
Fulfil’s software engineers develop the next-generation technologies that change how millions of customer orders are fulfilled by merchants. Our products need to handle information at a massive scale. We're looking for engineers who bring fresh ideas from all areas into our technology.
As a Front End software engineer, you will work on the ReactJS powered user interface used by Fulfil merchants to manage their back-office operations. This is mission critical software and your primary focus will be on developing user interface components and implementing them following well-known React.js workflows. You will ensure that these components and the overall application are robust and easy to maintain. In this role, you will be collaborating closely with the rest of the team working on different layers of infrastructure in an international environment. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality are important.
What You’ll Do:
- Collaborate with a small yet extraordinarily talented team of engineers to implement front-end technologies
- Develop new user-facing features using React.js and React Native
- Work closely with the Design and Product teams to translate complex technical workflows into delightful user experiences
- Define how Fulfil builds user interfaces and ensure that we’re utilizing and keeping up with modern web standards
- Continually test, measure, and iterate on the results of your work in the spirit of continuous improvement
- Write clean, reusable, and well-tested front-end code
- Help to bridge the responsibilities of the Product and Engineering teams, spending time with both on the way to launching new products
- Architect efficient and reusable front-end abstractions and systems that drive complex web applications
- Create reliable and type-safe applications with Typescript
- Build and contribute to open source projects
- Build reusable components and front-end libraries for future use
- Optimize components for maximum performance across a vast array of web-capable devices and browsers
We’re Looking for Someone With:
- 5+ years of experience as a front end engineer
- Experience in building large-scale web applications in a fast-moving team environment
- A strong understanding of UX and UI design standards
- The perfectionist’s touch on a pragmatist’s deadline: you strive for pixel-perfection and intuitive functionality
- Strong proficiency in JavaScript (2-4 Years of experience), including DOM manipulation and the JavaScript object model
- Thorough understanding of React.js and its core principles, with experience in popular React.js workflows
- Experience with common front-end development tools such as Babel, Webpack, NPM, etc
- Experience with popular testing frameworks, like Jest, Cypress, and Testing Library.
- The ability to bring any design to life with HTML and CSS, with cross browser compatibility and accessibility
- Smarts, humility, communication skills, and equal willingness to teach and learn
- Familiarity with RESTful and GraphQL APIs
- Knowledge of modern authorization mechanisms, such as JSON Web Token
- Experience in developing large client side JavaScript applications
- Familiarity with code versioning tools like GIT
- Experience with Javascript testing tools and test automation
Nice to Haves:
- Prior experience at a growth stage Internet/Software company
- Demonstrated work beyond the front-end, experienced in integrating with a wide array of back-end technologies and services (e.g. experience with Python, AngularJS)
- Experience developing large client-side applications and optimizing them for performance
- You can straddle client and server development, creating APIs that drive web apps
- You understand the intricacies of timezones
- Web optimization, performance tools, and load testing
- You maintain or contribute to an open-source project

About Fulfil.IO
About
Connect with the team
Similar jobs
Job Title: Frontend Developer – Perpetual Trading
Location: Remote
Experience: 2+ Years
About the Company
We are a next-generation cryptocurrency exchange focused on building innovative and secure trading experiences for digital assets and derivatives. With a strong emphasis on perpetual trading and real-time market execution, we aim to redefine how traders interact with crypto markets — combining transparency, performance, and user-centric design.
Role Overview
We are seeking an experienced Frontend Developer with a strong background in perpetual trading platforms and Web3 projects. The ideal candidate has hands-on experience integrating perpetual trading APIs such as GMX, Hyperliquid, or similar decentralized perpetual exchanges. You will develop high-performance, real-time trading interfaces that deliver seamless user experiences.
Key Responsibilities
- Develop and maintain scalable, responsive, and real-time front-end interfaces for perpetual trading dashboards.
- Integrate APIs from decentralized perpetual trading platforms like GMX, Hyperliquid, or others.
- Implement real-time order books, charts, and market data using REST and WebSocket APIs.
- Collaborate with backend, blockchain, and UI/UX teams to deliver a cohesive trading experience.
- Optimize the interface for low latency and high-frequency data updates.
- Implement wallet connectivity (MetaMask, WalletConnect) and secure trade execution flows.
- Write clean, modular, and maintainable code following modern front-end practices.
Required Skills & Experience
- 2+ years of experience as a Frontend Developer in crypto, DeFi, or trading platforms.
- Proven experience integrating perpetual trading APIs (e.g., GMX, Hyperliquid, Drift, or similar).
- Strong skills in React.js / Next.js, TypeScript, HTML5, CSS3, and JavaScript (ES6+).
- Experience working with real-time data using WebSockets.
- Familiarity with charting libraries (TradingView, Recharts, D3.js).
- Understanding of Perpetual Trading, Futures, and DeFi trading mechanics.
- Hands-on experience with Web3 integration using ethers.js or web3.js.
- Knowledge of API integration, front-end performance optimization, and security best practices.
Good to Have
- Experience in DEX / Web3 UI development.
- Familiarity with Redux, Zustand, or other state management tools.
- Understanding of smart contracts and on-chain data.
- Strong eye for UI/UX design in complex trading applications.
Skills: Basic programming knowledge, Responsiveness Of All devices IPad ,Mobile,Tablet Laptop all resolution
Job Description:
Creative with design skills In hand HTML5.CSS3, Bootstrap, JS and Jquery.
Candidate should be able to develop logic and code independently.
Need to understand the client requirement and try to make creative design for the client.
Must good knowledge of PHOTOSHOP, HTML, CSS. Bootstrap, JavaScript, responsive structure.
Should be able to work Jquery and JS +points.
Should be able to deployment of Live Server.
Location :- Gomti Nagar, Lucknow
Work from office:- 9:30AM - 6:30 PM
Role & Responsibilities
4-7 years of Strong proficiency in Full stack Development of Web Applications and experience in shipping production applications.
Experience of using Typescript for development would be a mandate.
Frontend- next.js, react.js, vue.js and bit for svelte kit are highly preferred Backend- node.js, react.js, express.js
B.Tech in Computer Science Engineering from Tier 1 Colleges preferred
Experienced with Tailwind CSS
Experienced with TDD for component and end-to-end testing
Ableto set up CI/CD pipelines for testing and deployment (canary, staging) using Github actions according to project
Entrepreneurial mindset with strong decision-making skills
Ability to move quickly without breaking things too much (we are dreamers)
Ability to work under immense pressure which is balanced by a sense of responsibility and ownership
Comfortable working with a Git style workflow where every commit deploys to a staging environment and merged pull requests deploy to production
We are looking for a Frontend Developer who would be working on the bleeding edge of technologies. We work primarily with React, Typescript and Redux.
Responsibilities:
- Understand why a particular design was chosen and code accordingly.
- Will have to deliver clean bug-free unit-tested code with minimal guidance.
- Strive for continuous improvement by refactoring and applying best practices.
- Learn and adapt to new technologies as necessary.
Requirements:
- Must be proficient in React, Redux, Redux Toolkit and Typescript.
- Used Typescript for React Components.
- Unit Testing, Component Testing, and Custom React hook tests with React Testing Library.
- Integration Tests with Cypress.
- Data Fetching libraries like Axios, React Query, RTK Query etc.
- Should have maintained React Components with Storybook.
- Experience contributing to open-source software will be preferred.
- Used various CSS stylings methods like CSS Modules, LESS, SCSS, Tailwind, Styled Components, Emotion etc.
- Should understand Git.
- Ability to work in a fast-paced and dynamic work environment.
- Exceptional interpersonal skills and demonstrated leadership abilities.
Responsibilities:
Develop and maintain user-facing features for web applications
Collaborate with the design team to implement responsive and visually appealing interfaces
Ensure the technical feasibility of UI/UX designs
Optimize applications for maximum speed and scalability
Stay updated on emerging frontend technologies and industry best practices
Troubleshoot and resolve bugs and performance issues
Work closely with backend developers to integrate frontend components with server-side logic
Participate in code reviews and contribute to a collaborative development environment
Skills:
Proficient in HTML, CSS, and JavaScript
Experience with modern JavaScript frameworks (e.g., React, Angular, or Vue)
Strong understanding of responsive design and cross-browser compatibility
Familiarity with version control systems (e.g., Git)
Knowledge of build tools and package managers (e.g., Webpack, npm)
Ability to translate design mockups and wireframes into code
Excellent problem-solving and debugging skills
Strong communication and collaboration skills
Attention to detail and a passion for delivering high-quality user experiences
Qualifications:
Bachelor's degree in Computer Science, Web Development, or a related field (or equivalent work experience)
Proven experience as a Frontend Developer or similar role
Portfolio showcasing previous frontend projects and development work is a plus
Candidate will be responsible for designing, developing, testing, and debugging responsive web and mobile applications for the company. Using Angular/React, JavaScript, HTML, and CSS, this candidate will be able to translate user and business needs into functional front-end design.
Responsibilities :
- Designing, developing, and testing UI for mobile and web applications.
- Build reusable code and libraries for future use.
- Accurately translate user and business needs into functional front-end code.
Requirements :
- Bachelor's degree or equivalent in Computer Science, Information Technology or MCA.
- 2-5 years of experience
- Good in fundamentals of Computer Science and Programming Languages
- Understanding of HTML, CSS or JavaScript will be an added advantage.
Primary Responsibilities:
- Coding and debugging pure JavaScript, polyglot and multi-lingual applications.
- Working closely with Technical Lead/Project Manager to ensure development timelines are met.
- Contribute with ideas to improve system design or streamline product delivery.
- Working with challenging applications involving Real Time Data.
- Working on different platforms including the usage of the Native SDKs provided on JavaScript.
Required Skills:
- Strong experience in developing applications using Javascript and Jquery.
- Minimum 6 months of experience in React.JS is a must.
- Experience in any other Javascript libraries is an added advantage.
- Create different types of Charts and Graphics with the help of HTML5 Canvas, SVG etc.
- Should possess understanding of UI design and its behavior across devices (desktops to smart phones).
- Good to have worked with APIs exposed by social media sites like Facebook, Twitter, Instagram etc.
- Experience in working with data structures such as XML and JSON.
- Added knowledge of mobile development frameworks like jQuery Mobile is an added advantage.
- Good communication and problem-solving skills.
- Should be a self-starter and should have the ability to work under pressure.
- Should be passionate about sports.
Responsibilities:
Understand business and functional requirements to be developed.
Develop UI screens and Database interactions
Help applications teams to follow coding best practices, including our refence application scaffolding, build system and test coverage . Also the job involves writing React components for the application team if said component is not yet ready.
Framework development, Libraries Development , writing react components for the application.
Will be required to suggest improvements in the existing framework, suggest and implement best practices, be knowledgeable about the updated trends in UI development and ReactJS in particular.
Technical Skills:
Strong JavaScript experience using multiple frameworks and libraries across different project / applications.
Thorough understanding of React.js core principles along with React router , Redux workflows and data structures.
Thorough understanding of ES6, ES7, ES8 / newer specifications of ECMAScript
Strong knowledge in vanilla JavaScript, including DOM manipulation.
Knowledge of Isomorphic React.
Expertise with Web pack, gulp and other front end build tools (npm)
- Proficient in current React Versions and understanding of upcoming version(s) like 1.6.3.
Must have experience with Git.
Strong knowledge of CSS concepts and experience with pre-processors.
Understand Business requirement work with UX , business analyst teams to plan and translate mockups and wireframes to optimized , reusable , quality code.
Strong knowledge of code optimization techniques for maximum performance and cross browser compatibility along with authorization mechanism in multiple applications using different front-end frameworks.











