**About Twine** Twine is a leading platform connecting top-tier freelancers, consultants, and contractors with companies that need creative and tech expertise. Trusted by Fortune 500 companies and innovative startups alike, Twine is the go-to marketplace for mission-critical projects. With a network of over 500,000 freelancers and 35,000+ companies, we provide a comprehensive solution for businesses looking to build agile teams and for freelancers seeking opportunities to work on high-impact projects. **Our Mission** At Twine, our mission is to empower creators, whether they're businesses or individual freelancers, to grow and thrive. As automation and AI reshape the workforce, we're driving the shift towards remote, freelance-driven work. We connect companies with top creative talent, enabling collaboration, innovation, and success on a global scale. **About The Role** We are seeking a programmer for a full-time contract position to work on a last-mile delivery solution. This role involves using React for front-end development and Supabase for managing services and back-end tasks. The position is fully remote, allowing candidates from any location to contribute to the project. We are open to hiring candidates at various experience levels, including beginners, juniors, or mid-level professionals, provided they demonstrate the required skills and a strong commitment to learning and delivering results. This is an excellent opportunity to contribute to an impactful solution and grow your technical expertise in a supportive environment. **Requirements**

*   Experience or knowledge of React for building user interfaces
*   Familiarity with Supabase or similar back-end service tools
*   Strong problem-solving skills and ability to adapt to technical challenges
*   Enthusiasm for last-mile delivery solutions and logistics technology
*   Open to feedback, collaboration, and continuous learning
*   Reliable internet connection and ability to work remotely in a full-time capacity

This position offers the chance to work on an innovative project while gaining valuable experience and contributing to real-world solutions. If you're passionate about programming and ready to grow, we'd love to hear from you!

Freelance Developer

**Job Title: React Developer (Remote)Location:Remote** We are looking for a talented React Developer to join our remote team. The ideal candidate will be proficient in React and have experience in building and maintaining high-performance web applications. You will be responsible for developing new user-facing features, optimizing applications for maximum speed, and ensuring that all components and the overall application are robust and easy to maintain. **Key Responsibilities**

*   Front-End Development:

*   Develop new user-facing features using React.js.
*   Build reusable components and front-end libraries for future use.
*   Translate designs and wireframes into high-quality code.

*   Performance Optimization:

*   Optimize components for maximum performance across a vast array of web-capable devices and browsers.
*   Ensure the technical feasibility of UI/UX designs.

*   Collaboration:

*   Work closely with product managers, designers, and back-end developers to implement versatile solutions.
*   Participate in discussions with team members to define and refine the product vision and strategy.

*   Code Quality & Maintenance:

*   Write clean, maintainable, and efficient code.
*   Conduct code reviews and ensure high code quality and best practices.
*   Identify and address performance bottlenecks and bugs in the codebase.

*   Testing & Debugging:

*   Write unit tests and perform debugging to ensure a robust and error-free application.
*   Collaborate with QA teams to guarantee that applications meet quality standards.

*   Documentation:

*   Maintain clear and comprehensive documentation of the development process, code, and API specifications.
*   Share knowledge and expertise with the team through documentation and code reviews.

**Qualifications**

*   Education:

*   Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent experience).

*   Experience:

*   Proven experience as a React Developer with a strong portfolio of web applications.
*   Proficient in JavaScript, including DOM manipulation and the JavaScript object model.
*   Experience with popular React.js workflows (such as Flux or Redux).
*   Familiarity with RESTful APIs and GraphQL.
*   Experience with modern front-end build pipelines and tools (e.g., Webpack, Babel, npm).
*   Strong knowledge of HTML5, CSS3, and responsive design principles.

*   Skills:

*   Deep understanding of React.js and its core principles.
*   Familiarity with modern front-end development practices and tools.
*   Experience with code versioning tools such as Git.
*   Knowledge of CI/CD pipelines and deployment strategies.
*   Ability to optimize performance and troubleshoot issues in a live production environment.

***** *********

**About Us:**

We are **Bettervits**, a fast-growing ecommerce brand dedicated to providing high-quality health and wellness products. Our mission is to help customers lead healthier lives by offering innovative, science-backed solutions. We pride ourselves on delivering exceptional digital experiences that drive engagement and conversions.

**About the Role:**

We’re looking for a **Marketing Front-End Developer** with a focus on building high-performing landing pages for our direct-response marketing campaigns. This role is perfect for a developer with a keen interest in marketing who can translate creative ideas into technical solutions that enhance user experience and drive conversions.

As a key part of our team, you’ll develop high-converting landing pages, interactive quizzes, and advertorials. You’ll collaborate closely with our marketing and design teams to craft engaging, user-friendly experiences that align with our brand and business goals.

**Responsibilities:**

*   Develop responsive, optimized landing pages, advertorials, and interactive quizzes using **HTML, CSS, and JavaScript**.
*   Utilise frameworks such as **Gatsby.js** to create performant, dynamic front-end experiences.
*   Collaborate with marketing and design teams to implement user-centric, high-converting designs.
*   Optimize landing pages for performance, SEO, and conversion rates.
*   Integrate third-party tools and platforms (e.g., Google Analytics, marketing automation tools, and A/B testing platforms).
*   Implement and monitor A/B tests, providing insights to improve conversion rates (CRO).
*   Troubleshoot and resolve technical issues to ensure seamless user experiences.
*   Ensure code quality, cross-browser compatibility, and adherence to best practices for responsiveness and accessibility.

**Requirements:**

*   Proven experience developing landing pages, preferably in an **ecommerce** or **marketing** environment.
*   Strong skills in **HTML5, CSS3, JavaScript**, and responsive design.
*   Experience with modern frameworks and tools such as **Gatsby.js** and React.
*   Knowledge of web performance optimization techniques (e.g., image optimization, lazy loading).
*   Familiarity with A/B testing tools (e.g., Optimizely, Google Optimize) and a basic understanding of CRO.
*   A strong eye for design and attention to detail.
*   Experience troubleshooting and debugging cross-browser and cross-platform issues.
*   Familiarity with Git for version control.

**Bonus Skills:**

*   Experience with headless CMS platforms or static site generators.
*   Familiarity with ecommerce platforms like Shopify, WooCommerce, or similar.
*   Knowledge of UX/UI design principles.
*   Understanding of marketing tools such as Google Tag Manager, HubSpot, or Klaviyo.

**What We Offer:**

*   Fully flexible, remote position.
*   Competitive salary and benefits.
*   Security and stability in a fast-growing, profitable brand.
*   A dynamic, collaborative environment where your contributions directly impact our growth.
*   Opportunities for professional development and upskilling.
*   The chance to work on exciting projects with a rapidly expanding brand.

Marketing Frontend Developer

Synchro is collaborating with one of the UK’s top software companies to recruit a Senior Frontend Developer specialising in React.js for a 6-month contract.

In this role, you will take primary responsibility for front-end development tasks within the backlog, completing some independently and others through pair programming. Working as part of a multidisciplinary squad, you may also contribute to Back-End development, QA, and other areas to ensure sprint goals are achieved.

Our client is currently addressing some technical debt and is on a real mission to rebuild their core platforms using the latest technologies. This platforms services millions of users with highly complex API integrations and a user friendly mobile customer journey. The back end of the new platforms will be primarily designed in a microservices way built using C#.Net Core and the front end UI will be built around React JS

Skills required:

*   Attention to detail - taking designs and translating into UI
*   Javascript (ES6/7/8)
*   HTML5
*   CSS3, SASS
*   Git experience
*   React
*   Unit and integration testing experience (ideally Jest, Testing Library, Cypress etc)
*   Flux style state management like Redux (Sagas or Thunks) or useReducer
*   Styled Components
*   Typescript
*   Experience with Docker/containers
*   Experience setting up projects - linting, formatting, project structure etc.

ROLE: Frontend Developer (JavaScript/ReactJS)

LOCATION: Fully Remote

DAY RATE: £400 - £500 per day (Outside IR35)

Please contact Joely Callaghan at Synchro to explore this fantastic exclusive opportunity further or apply through this job posting and we will be in touch shortly.

Senior Frontend Developer (Contract)

**We are looking for a full stack developer with a growth mindset to join our team to help build software that improves the lives of thousands of patients in the UK and abroad.Salary: £50kWho We Are** Ultramed is an award-winning, B-Corp certified company serving patients and healthcare providers in the UK and abroad. We won a King's Award for Enterprise: Innovation in 2023. We are backed by the NHS Innovation Accelerator and are recognised by the UK Department of International Trade as one of the UK's top 100 digital health companies. We have a smart, dynamic and diverse team working together to improve healthcare. Our Mission At Ultramed we're on a mission to empower patients through technology and freeing healthcare teams to do what matters: caring for their patients. We believe software has the potential to change the way we deliver healthcare and help us live happier, healthier lives. We work hard every day to move the needle and deliver on that promise. **Our Values**

*   Integrity: Upholding honesty, transparency, and reliability in all interactions and operations, fostering trust among team members, customers, and patients
*   Proactivity: Taking initiative to anticipate needs, solve problems, and drive continuous improvement, while remaining flexible and adaptable in the face of change and challenges
*   Collaboration: Embracing teamwork and cooperation, valuing diverse perspectives, and working together to achieve common goals and solve complex problems
*   Patient advocacy: Prioritising patient safety and well-being in all endeavours, and striving for excellence in delivering high-quality solutions

What we do Ultramed's platform allows patients to securely share their personal health information with their healthcare teams. With Ultramed, healthcare teams can request information from a patient to help plan upcoming operations or procedures. Our platform reduces the number of unnecessary appointments for patients, improves patient safety and increases efficiency for healthcare providers. **What You'll Work On**

*   Working in a team, you will build products that matter and help healthcare teams care for patients
*   You will have the opportunity to solve difficult problems in healthcare for real people using interesting technologies
*   You will design and deliver important features
*   Patient first - Everything we do is about helping patients. You will have the opportunity to work closely with our user experience and customer support teams to advocate for patients

**Stack** We use primarily Node.js, Typescript and React however we actively explore new technologies and use the right tool for the job. **Requirements**

*   You write performant, well-tested, accessible full stack applications
*   You can perform the development of features from ideation to production
*   You have experience running cloud based applications in any public cloud provider
*   You have a strong focus on user experience and product
*   You have excellent communication skills
*   You enjoy learning new tools, languages and technologies
*   We value your curiosity and ability to learn quickly more than your experience in a particular technology
*   You are resident for tax purposes in the United Kingdom

**Benefits**

*   Fully remote and flexible working Work from wherever you work best with control over your work hours\*\*
*   9-day working fortnight Alternating Fridays off with no reduction in salary or Annual Leave. Average of 36 hours per week
*   Working From Home allowance Tax-free monthly allowance to cover additional costs
*   Pension Match and Salary Exchange We will match your contributions above the statutory requirements up to a total contribution of 14% (6% employer, 8% employee split).
*   Profit-Sharing We set aside a proportion of our annual profits and distribute it equally amongst our team
*   Share Incentive Plan Tax-free shares are issued regularly so it builds up your shareholding and longer-term value for you
*   Loyalty Annual Leave Bonus Scheme Starting with 24 days of Annual Leave, including 1 day to take on your birthday, we award additional days for continuous employment with Ultramed
*   Annual Leave Purchasing Scheme Employees can purchase up to 5 additional days of Annual Leave every year
*   Top-notch equipment We will provide a new MacBook and other required peripherals as needed
*   Home office stipend You can request purchases to help equip your home office
*   Education budget You can request additional educational activities including courses, books, conferences and webinars
*   Contribution toward co-working space We will contribute towards a co-working space on a case-by-case basis if you are unable to work well at home
*   Flexibility for parents and carers We will work with you to structure work around your family, not the other way around
*   HealthShield cash back plan Claim back money used for health and wellness appointments and access to perks including 24/7 GP, counselling services, and subsidised gym memberships.
*   while being available for scheduled meetings within core hours of 10:00 - 16:00

Equity, Diversity and inclusion (EDI) Ultramed is committed to fostering an equitable, diverse and inclusive workplace. One of our core values is to do the right thing. That's why we know that continuing to work on our approach to equity, diversity and inclusion helps make us an outstanding remote employer. We are a small but growing team so it's important for us to make sure that we are representative of the patients and clinicians we help every day, as well as showing our employees that they matter. We use EDI approaches to recruitment, hold whole team learning sessions on a variety of topics including inclusive language at work, and regularly review our benefits package to make sure it suits the differing and changing needs of our team. We know that equity, diversity and inclusion is not a box-ticking exercise. We are fully committed to the ongoing work needed to review and improve our current processes, and are eager to keep learning and finding new ways to make Ultramed a truly inclusive workplace.

Full Stack Software Engineer

Career Renew is recruiting for one of its clients a Senior Front End Developer - Crypto - candidates need to live in CET +/-4 timezones. We lead the way in cryptocurrency trading, known as the fastest Telegram trading bot on Solana with an impressive $9 billion in traded volume. We deliver seamless, on-chain trading experiences with advanced tools such as DCA (Dollar Cost Averaging) orders, limit orders, and automatic wallet copy-trading. Our platform sets the standard in speed, innovation, and reliability. **Why Join Us?** We thrive on innovation and efficiency. Joining our team means contributing to projects that revolutionize the crypto trading landscape. We're continuously expanding our offerings to elevate user interaction and accessibility. This is your chance to contribute to a cutting-edge product that stands out in a competitive market for its reliability and speed. **Role Overview** We are looking for a highly autonomous and driven Front End Developer to collaborate with our existing developer and drive the creation of a high-performance app. **Key Responsibilities**

*   Build and Maintain: Develop and maintain a responsive and user-centric applications with React/NextJS and TypeScript
*   Collaborate with Vision: Work under the guidance of the Senior Full-Stack Developer to ensure seamless integration between the front and back end
*   Optimize for Speed: Implement best practices to maintain fast and responsive performance
*   Problem-Solve with Impact: Tackle complex challenges with effective, innovative solutions that enhance user experience
*   Champion Code Quality: Ensure clean, maintainable, and well-documented code, contributing to a sustainable development environment
*   Engage in Real-Time Features: Support the integration of real-time data and enhance user interactions for trading functionalities

**Requirements** 5+ years in front-end development with significant experience in React/NextJS and TypeScript. Expertise in creating fast, dynamic web interfaces. Experience working with trading platforms, DeFi, or similar tech. Familiarity with CI/CD workflows and collaborative development tools. Have held leading roles in crypto trading platforms/exchanges, contributing to critical platform components. **Benefits**

*   Flexibility: Work remotely on your own schedule
*   Growth and Innovation: Be part of a team that is constantly evolving and integrating the latest in trading technology
*   Impactful Work: Your contributions will directly shape the user experience of one of the fastest trading tools on the market

Senior Front End Developer - Crypto

We're recruiting a full-stack developer to join our product team at Spidergap/AirManual. This is a rare opportunity to join a small, 100% remote, profitable and ambitious company that also appreciates that there's more to work than revenue (!). At Spidergap/AirManual, we're:

*   Fueled by the passion and exceptional talent of a successful start-up
*   Hungry to amaze our customers and grow the business
*   Always looking to grow as individuals and a team
*   AND Focused on doing it all without unnecessary stress, and with a healthy work-life balance

If you're a software developer who moves quickly and values code quality, wants to grow by working in a small and experienced team, and loves helping real customers to achieve their goals... then read on! **What We Do** We're a SaaS business with two products: Spidergap and AirManual. You'll be working primarily on Spidergap, with opportunities to contribute to both products. **Spidergap** With Spidergap, our goal is to make it easy for organizations to support the personal development of their employees. We do this by providing a platform for employees to get feedback, plan personal development, and take action. We've been the top-rated 360° Feedback tool since 2017, and are used in 134+ countries by thousands of organizations including Samsung, 3M, Sony, the NHS, the European Commission, Breville, Konica Minolta and Philips. We've recently kicked off an ambitious plan to expand our product offering, as we look to support employees with all aspects of personal development. This includes a revamp of our product working in the latest technologies. **AirManual** We created AirManual in 2020 with the goal of helping other businesses to scale up, without constant stress. We provide tools for documenting and automating processes, working together in teams, and reviewing the health of the entire business. We're now supporting over 100 businesses, including big names such as Asahi Beer and with particular traction in the Accountancy market. As with Spidergap, we consistently get exceptionally positive reviews. We're currently expanding the AirManual product to support teams with wider challenges that cause stress in small businesses, such as managing the day-to-day issues that occur in teams. **Requirements** We're looking for someone who's a great fit for our company values, and who can bring the technical talent needed in this specific role. **Do you share our values?** We're looking for people who share our values:

*   Focus on impact: We know our growth is dependent on increasing the value we deliver to customers. We focus our energy on improvements that will make a real difference, with a desired outcome made clear up-front. We expect everyone to understand why they are working on a particular activity or objective, being clear on how it will benefit the business and our customers
*   Be proactive and dependable: Everyone can solve problems and remove barriers to growth — both personally and for the company. We are quick to raise issues and ideas, and to recommend next steps. We make it easier for others to feel they can depend on us by being proactive in our communication and action
*   Pay attention to detail: We believe the quality of everything we do is a competitive advantage. We expect high attention-to-detail, whether it's in how we write an email, review our analytics, or design the site. We delight in getting the details right, even in internal documents. High attention to detail isn't something you turn on and off — it's an attitude.
*   Always look to improve: We survive and grow by constantly looking for opportunities to improve our solutions, our processes and ourselves. We own our mistakes, using them as an opportunity to learn what changes we should make to processes and tools. We expect our people to proactively look for opportunities to develop and improve our own performance
*   Enjoy the journey: We consider our health and families to be more important than work. We ensure no-one feels that they are frequently required to work excessive hours. We support each other in overcoming problems and achieving work and life goals. We're positive and enthusiastic — helping everyone feel energized to take us to the next level. We don't pin our happiness on the attainment of a particular end goal — we delight in each step along the way

We don't just ‘say' these are our values. We use them all the time — to recruit the right people, manage individual performance, recognize good practice, and make decisions. **Is the role right for you?** A large part of the work will be developing and supporting new functionality using TypeScript/NodeJS/React. We follow "clean" code principles, agile processes and continuous integration tools to efficiently take features from concept to roll-out, and to continuously optimize our processes. Your attention to detail will help us to amaze our customers, and to grow our services and codebase in a robust and maintainable way. **Responsibilities:**

*   Collaborate to deliver solutions from design to release
*   Write reliable, modular, well-tested and "clean" code
*   Proactively raise ideas and issues, contributing to designs with feedback and suggestions for improvement
*   Support other team members through peer review
*   Help to optimize our development processes and build tools
*   Ensure progress, issues and ideas are communicated clearly to the right people
*   Help us to deliver outstanding customer support

**Tech stack (Spidergap):**

*   TypeScript
*   Node.js (NestJS)
*   Remix (React)
*   MySQL
*   Google Cloud

AirManual uses a similar tech stack, using PostgresSQL rather than MySQL and currently reviewing whether to adopt Remix + TypeScript. You may be occasionally asked asked to support legacy solutions developed with Express, Create React App, AngularJS, Loopback, and PHP. **Tools:**

*   GitHub
*   Slack
*   Codeship
*   Dropbox Paper
*   GMail
*   Hubspot
*   Sentry
*   (And many more!)

**Requirements:**

*   Passionate and driven — about software development, and about life outside work
*   Excellent attention to detail, including a focus on delivering high-quality code that is easy to maintain and scale
*   2+ years of JavaScript experience, working on production code
*   Experience with front-end libraries in production such as React or Vue
*   Experience with React, SQL, HTML, CSS and automated testing
*   Happy to work remotely
*   Loves 'going the extra mile' to deliver outstanding work
*   Believes in and practices self-improvement / personal development
*   Keen and able to learn
*   Loves technology and figuring out how things work and helping others to do the same
*   Communicates clearly, in a friendly way

**Location:**

*   This is a 100% remote job — you are responsible for having an effective work environment
*   You must be in a location that overlaps the working hours of our existing team members — we will only accept applications in timezones from UTC -5 (New York) to UTC +6 (Dhaka)
*   Due to local employment and/or international laws, we cannot currently employ people based in Brazil, France, Russia, or UAE

**Benefits** We strive to make Spidergap _the_ best place to work. We are doing this by creating the best products in our markets, building a great diverse team, encouraging great work-life balance (including taking lots of annual leave), being family-friendly, having fun, and maintaining a strong culture of continuous improvement (business and personally).

*   "Working at Spidergap has been a huge quality of life upgrade"
*   "This company truly works as a TEAM. The co-founders have brought together a top-notch group of A players who work together seamlessly."
*   "This is the best work-week I have ever had. I love it here."

**Benefits:**

*   Competitive salary. We calculate a competitive salary that represents the typical salary (50th percentile) for your role, experience and location. This is typically in the range of GBP £45k-£70k / USD $45k-$90k
*   Profit share bonus, paid annually. Based on company profit and individual performance (reviewed throughout the year, not just at the end!)
*   40 days paid vacation inclusive of public holidays. We'll make sure you take them!
*   Work remotely. As long as your internet connection is excellent and you're able to collaborate when needed, you're free to work from any location you wish
*   Flexible working. You'll need some set hours in which to collaborate with the team, but we'll do our best to be flexible so you can support your family, friends and/or hobbies!
*   Annual all-staff meet-up. Previous locations: Iceland, Barcelona, Berlin, Athens, Edinburgh, Budapest
*   4 months paid maternity/paternity leave.
*   Family-friendly work environment. Both co-founders work from home and have young children so we understand the challenges and what helps!
*   Health membership contribution — you can use this to pay for the gym or an equivalent activity
*   Bring your own device contribution. We'll make sure you have the equipment you need to work efficiently
*   Pension contribution. Typically 10%, depending on country laws

Full-Stack Developer with Work-Life Balance (JavaScript, Node.js, React)

We are seeking a React Frontend Expert to join our team. This role offers the opportunity to work on a cutting-edge, modular frontend architecture, collaborating with a talented team and leveraging your expertise to build scalable, performant, and beautiful user interfaces. If you thrive in fast-paced environments, have worked in early startups before, and are excited about shaping the frontend of a powerful enterprise AI platform, we’d love to hear from you!

**Location**

This role will be remote, based in London (UK).

Applicants must be legally authorized to work in the United Kingdom.

**Responsibilities**

You will develop expertise in using Viso Suite and leverage your knowledge to contribute across various areas, including:

*   Build, maintain, and optimize a library of reusable, modular React components.
*   Integrate seamlessly with backend APIs (REST/GraphQL) to deliver responsive UIs.
*   Collaborate with designers and product managers to create high-quality interfaces (Figma).
*   Architect, document, and enforce best practices for frontend development and component management.
*   Optimize for performance, accessibility, and maintainability in all projects.
*   Troubleshoot and debug frontend issues with speed and precision.
*   Contribute to improving CI/CD pipelines and overall development processes for frontend deployment.

**Qualifications**

We value diverse experiences and encourage candidates from various industries to apply. While the following qualifications will make for a strong candidate, alternative experiences that bring something new to the table are also welcome.

**Required Skills**

*   3+ years of professional experience with React.js.
*   Proficiency in JavaScript, TypeScript, HTML, and CSS.
*   Experience with state management libraries (e.g., Redux).
*   Proven ability to design and implement modular and reusable components.
*   Experience working with GraphQL APIs, and REST APIs.
*   Strong understanding of performance optimization and debugging in React.
*   Familiarity with modern build tools (Webpack, Vite, or similar).
*   Experience with micro-frontend architecture or component libraries (e.g., Storybook)
*   Knowledge of testing frameworks (e.g., Jest, React Testing Library).

**Desired**

*   Basic backend knowledge to assist with API design and integration.
*   Experience working in fast-paced, early startup environments.
*   Basic understanding of computer vision, machine learning and AI concepts.

**What We Offer**

We build the only end-to-end infrastructure for computer vision. It empowers enterprises to implement AI vision solutions significantly faster and better than ever before.

viso.ai is backed by the most successful investors who previously backed Facebook, Slack, Atlassian, DropBox, UiPath, Celonis, Segment, and many more. There are many benefits to working at viso.ai, including, in addition to competitive pay, being part of a small and agile, fast-growing company.

*   Opportunity to work in a fast-paced, innovative environment.
*   Competitive compensation package.
*   Private Medical Insurance (including optical and dental)
*   Flexible working hours and remote work options.
*   Professional development and career growth opportunities.

Join us in driving growth and shaping one of the most exciting AI industries.

We look forward to hearing from you!

Frontend Developer (React)

Frontend Developer - Tikz/PGF/LaTeX **Experience:** 3 - 25 Years **Location: -** Permanent Remote anywhere in the World **Contract Length:** 6 Months **Type: Full time** contract(8 hrs/day) Overlap Hours: 4 hrs/day with PST **Total Years Of exp: 3+ years experienceMandatory** React OR JavaScript OR Typescript: 3 yrs Tikz/LaTex: 1yr; (Basic knowledge of Tikz/LaTex will be ideal). **Nice to have:** Prior experience with graphical rendering, data visualization, or charting libraries in the context of front-end development, and Experience working with design tools (e.g., Figma, Sketch) or design systems. **About The Role** We are actively seeking talented developers proficient in React JS/TS and Tikz/PGF to join our dynamic team, dedicated to pushing the boundaries of innovative software and AI solutions. This opportunity is ideal for professionals who enjoy tackling challenging problems, developing creative solutions, and contributing to next-generation technologies in a fast-paced, collaborative environment. You will work with different companies across the US, developing both commercial and research-driven solutions at the intersection of front-end development and advanced visualization. **Required Skills**

*   Write readable, reusable, and maintainable code with a strong emphasis on scalability and efficiency.
*   Participate in code reviews, providing constructive feedback and ensuring code quality standards are met.
*   Demonstrate proficiency in React JS for building complex, dynamic UIs with modern web technologies.
*   Utilize Tikz/PGF for graphical and data-driven visualization within web applications, especially for complex charts, diagrams, and interactive graphics.
*   Strong experience with JavaScript/TypeScript in modern frameworks and libraries.
*   Create modular, component-driven architecture to ensure maintainability and extensibility of the codebase.
*   Strong knowledge of web performance optimization, responsive design, and cross-browser compatibility.
*   Strong understanding of ES6+ JavaScript, React, Redux, and state management principles.
*   Design, develop, and maintain reusable code and libraries.
*   Collaborate with back-end developers and other team members to integrate front-end and back-end components seamlessly.
*   Bachelor’s or Master’s degree in Engineering, Computer Science, or a related field (or equivalent experience).
*   At least 3+ years of relevant experience in front-end development using React JS, with experience in using Tikz/PGF for rendering complex diagrams and graphics within the web environment.
*   Experience with version control systems, especially Git, and familiarity with agile software development practices.
*   Demonstrable experience developing high-quality, high-performance, and maintainable web applications.
*   Proficient in written and spoken English, with strong communication skills to collaborate effectively across teams and time zones.

**Technologies**

*   Front-end: React, Redux, HTML5, CSS3, JavaScript/TypeScript
*   Visualization: Tikz/PGF, D3.js , SVG

Skills: pgf,html5,web,charting libraries,tikz,sketch,version control systems,figma,css3,latex,react,react js,git,svg,typescript,javascript,data visualization,d3.js,graphical rendering,front-end development,redux

Sr React Frontend Developer - Tikz/PGF/LaTeX

hackajob on-demand focuses on matching talented contractors like you with organizations seeking specific skills for their projects. We use our platform to connect you with exciting contract opportunities and discuss projects on behalf of the companies we partner with.

**Job Title:** React Developer – Outside of IR35 – Market Rate

**Contract:** 3 months minimum

**Start Date:** ASAP

**Location:** Remote (monthly on-site meet-ups preferred but optional)

**Project:** Government Institution

**Job Overview:**

We are looking for a skilled React Developer to join our team for a 3-month contract. You’ll work on government projects, leading a React team and ensuring high-quality, accessible platforms.

**Responsibilities:**

*   Develop and maintain user interfaces using React and TypeScript.
*   Lead the React team, setting best practices (no people management involved).
*   Simplify technical concepts for non-technical team members.
*   Ensure the platform meets GDS accessibility standards.

**Skills Required:**

*   Strong knowledge of React and TypeScript.
*   Leadership skills to guide the team.
*   Clear communication and ability to explain technical ideas simply.
*   Understanding of GDS accessibility requirements.
*   Experience with government projects (nice to have, not required).

**Other Details:**

*   IR35 Status: Outside IR35
*   Monthly on-site meet-ups (optional but preferred).
*   No special security clearance required.

This is a great chance to work on meaningful government projects with a flexible and remote-friendly setup. Apply now!

Freelance Developer

Job Description

Apply now

Twine

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