React.js Developer

We are seeking a highly skilled React JS Developer with exceptional DOM manipulation expertise and real-time data handling experience to join our team. You'll be building and optimizing high-performance user interfaces for stock market trading applications where milliseconds matter and data flows continuously.

The ideal candidate thrives in fast-paced environments, understands the intricacies of browser performance, and has hands-on experience with WebSockets and real-time data streaming architectures.

Key Responsibilities

Core Development

• Advanced DOM Operations: Implement complex, performance-optimized DOM manipulations for real-time trading interfaces
• Real-time Data Management: Build robust WebSocket connections and handle high-frequency data streams with minimal latency
• Performance Engineering: Create lightning-fast, scalable front-end applications that process thousands of market updates per second
• Custom Component Architecture: Design and build reusable, high-performance React components optimized for trading workflows

Collaboration & Integration

• Work closely with traders, quants, and backend developers to translate complex trading requirements into intuitive interfaces
• Collaborate with UX/UI designers and product managers to create responsive, trader-focused experiences
• Integrate with real-time market data APIs and trading execution systems

Technical Excellence

• Implement sophisticated data visualizations and interactive charts using libraries like Chartjs, TradingView, or custom D3.js solutions
• Ensure cross-browser compatibility and responsiveness across multiple devices and screen sizes
• Debug and resolve complex performance issues, particularly in real-time data processing and rendering
• Maintain high-quality code through reviews, testing, and comprehensive documentation

Required Skills & Experience

React & JavaScript Mastery

• 5+ years of professional React.js development with deep understanding of React internals, hooks, and advanced patterns
• Expert-level JavaScript (ES6+) with strong proficiency in asynchronous programming, closures, and memory management
• Advanced HTML5 & CSS3 skills with focus on performance and cross-browser compatibility

Real-time & Performance Expertise

• Proven experience with WebSockets and real-time data streaming protocols
• Strong DOM manipulation skills - direct DOM access, virtual scrolling, efficient updates, and performance optimization
• RESTful API integration with experience in handling high-frequency data feeds
• Browser performance optimization - understanding of rendering pipeline, memory management, and profiling tools

Development Tools & Practices

• Proficiency with modern build tools: Webpack, Babel, Vite, or similar
• Experience with Git version control and collaborative development workflows
• Agile/Scrum development environment experience
• Understanding of testing frameworks (Jest, React Testing Library)

Financial Data Visualization

• Experience with financial charting libraries: Chartjs, TradingView, D3.js, or custom visualization solutions
• Understanding of market data structures, order books, and trading terminology
• Knowledge of data streaming optimization techniques for financial applications

Nice-to-Have Skills

Domain Expertise

• Prior experience in stock market, trading, or financial services - understanding of trading workflows, order management, risk systems
• Algorithmic trading knowledge or exposure to quantitative trading systems
• Financial market understanding - equities, derivatives, commodities

Technical Plus Points

• Backend development experience with GoLang, Python, or Node.js
• Database knowledge: SQL, NoSQL, time-series databases (InfluxDB, TimescaleDB)
• Cloud platform experience: AWS, Azure, GCP for deploying scalable applications
• Message queue systems: Redis, RabbitMQ, Kafka, NATS for real-time data processing
• Microservices architecture understanding and API design principles

Advanced Skills

• Service Worker implementation for offline-first applications
• Progressive Web App (PWA) development
• Mobile-first responsive design expertise

Qualifications

• Bachelor's degree in Computer Science, Engineering, or related field (or equivalent professional experience)
• 5+ years of professional React.js development with demonstrable experience in performance-critical applications
• Portfolio or examples of complex real-time applications you've built
• Financial services experience strongly preferred

Why You'll Love Working Here

We're a team that hustles—plain and simple. But we also believe life outside work matters. No cubicles, no suits—just great people doing great work in a space built for comfort and creativity.

What We Offer

💰 Competitive salary – Get paid what you're worth

🌴 Generous paid time off – Recharge and come back sharper

🌍 Work with the best – Collaborate with top-tier global talent

✈️ Adventure together – Annual offsites (mostly outside India) and regular team outings

🎯 Performance rewards – Multiple bonuses for those who go above and beyond

🏥 Health covered – Comprehensive insurance so you're always protected

⚡ Fun, not just work – On-site sports, games, and a lively workspace

🧠 Learn and lead – Regular knowledge-sharing sessions led by your peers

📚 Annual Education Stipend – Take any external course, bootcamp, or certification that makes you better at your craft

🏋️ Stay fit – Gym memberships with equal employer contribution to keep you at your best

🚚 Relocation support – Smooth move? We've got your back

🏆 Friendly competition – Work challenges and extracurricular contests to keep things exciting

We work hard, play hard, and grow together. Join us.

Description of Skills/abilities:

We are looking for a great JavaScript developer who is proficient with React.js. Your primary focus will be on developing user interface components and implementing those with well-known React.js workflows such as Redux. You will ensure that these components and the overall application are robust and easy to maintain. You will coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product is a must.

You will be responsible for architecting and building the applications, as well as coordinating with the teams responsible for other layers of the product infrastructure. Building a product is a highly collaborative effort, and as such, a strong team player with a commitment to perfection is required.

Responsibilities

1. Developing new user-facing features using React.js, React hooks.
2. Building reusable components and front-end libraries for future use.
3. Translating designs and wireframes into high quality code.
4. Optimizing components for maximum performance across a vast array of web-capable devices and all browsers.
5. Build pixel-perfect, buttery smooth UIs across all web browsers.
6. Diagnose, fix bugs, maintain code and write automated tests to ensure the product is of the highest quality.
7. Key understanding about Object Oriented Programming, Web Architecture, SDLC, Rest Framework.
8. Should have understanding in Hybrid App Ecosystem, Code Once - Deploy Anywhere thought process.
9. Responsible for development of new highly-responsive, web-based user interface.
10. Construct visualizations that are able to depict vast amounts of data.
11. Work with product team and graphic designers.
12. Develop a flexible and well-structured front-end architecture, along with the APIs to support it React.js developer requirements and qualifications.
13. Support the entire application lifecycle (concept, design, test, release and support). Produce fully functional web, mobile applications writing clean code.

Skills

1. Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model.
2. Thorough understanding of React.js and its core principles.
3. Having Experience with popular React.js workflows such as Redux.
4. Familiarity with newer specifications of Typescript.
5. Having Experience with data structure libraries (e.g., Immutable.js).
6. Knowledge of isomorphic React is a plus.
7. Familiarity with RESTful APIs.
8. Knowledge of modern authorization mechanisms, such as JSON Web Token.
9. Familiarity with modern front-end build pipelines and tools.
10. Experience with common front-end development tools such as Babel, Webpack, NPM, etc.
11. Familiarity with code versioning tools such as Git, SVN.
12. Knowledge of functional or object-oriented programming.
13. Ability to write well-documented, clean typescript code.
14. Rock solid at working with third-party dependencies and debugging dependency conflicts.
15. Understanding of REST APIs, the document request model, and offline storage.

Skill Set:

React, React Hooks, Redux, and Typescript with minimum of 6+ Years of relevant Experience.

Your key responsibilities will be converting PSD/Figma into HTML/CSS. You will also be responsible for writing clean, semantic front end code - HTML5, CSS3, JQuery, Java Script.

Selection Criteria
If your profile has selected then you have to attend a 3 hours assignment to move your candidature to the final round of interview.

• Seek to enhance the user experience by creating seamless navigation through various digital programs and interfaces within the company
• Use coding to develop the aesthetics implemented within a website or product, from the layout menus and drop-down options to colors and fonts
• Combine interface design concepts with digital design and establish milestones to encourage cooperation and teamwork
• Develop overall concepts for improving the user experience within a business webpage or product, ensuring all interactions are intuitive and convenient for customers
• Collaborate with back-end web developers and programmers to improve usability

• 2-4 years of demonstrated experience in creating and implementing UI development
• Detailed experience with coding and the ability to troubleshoot and analyze websites using HTML, CSS and comparable languages
• Continued education and research into UI development trends and current design strategy and technology
• Professional written and interpersonal skills
• Ability to prioritize and manage multiple milestones and projects efficiently
• Advanced problem-solving skills and the ability to optimize code for the best possible outcome
• Ability to work effectively in a collaborative environment to create top-performing interfaces
• Proficient with visual design programs such as Adobe Photoshop

UI Architect / Developer

1.       A must have skills is Angular. NodeJs preferred but can be replaced with anything on server side scripting.  

a.       70% work for this role in angular based. At architect role without server side scripting understanding doesn’t a right fit. 

b.       Someone who can take sound decision for overall interaction with backend.  

c.        There are components written in node (Control Manager and aith server) which we have intentions to align with UI architect.  

d.       Given Node is technology primary in java script (same as angular), generally we are seeing people who have earlier exposure or are confident to pick it with little learning. But we would not penalize anyone who is week in node, but champ in angular for this role. 

2.       Design , develop and maintain client facing web applications. 

3.       Cooperating with backend developers in the process of building REST APIs. 

4.       Should demonstrate deep understanding of the following: 

·         Design - HTML/CSS  

·         Frontend languages - Experience with Javascript  and related frameworks - Angular(7/8/9), Angular Material, Bootstrap(or similar CSS frameworks), Node JS (preferred but not mandatory). 

·         Test frameworks - Mocha, Chai, Jasmine, Karma 

To be shared by you - 

1.     Can you lead frontend-backend integration? 

2.     Can you use linux machines? 

3.     Are you aware of websockets? 

4.     Has you workedon binary data communication over websockets? 

5.     Do you understand different types of communication protocols available between frontend-backend and it's working? 

6.       Do you have experience on electron framework? 

7.       Highest team size managed by you.

React.js Developer Responsibilities:

• Meeting with the development team to discuss user interface ideas and applications.
• Reviewing application requirements and interface designs.
• Identifying web-based user interactions.
• Developing and implementing highly-responsive user interface components using React concepts.
• Writing application interface codes using JavaScript following React.js workflows.
• Troubleshooting interface software and debugging application codes.
• Developing and implementing front-end architecture to support user interface concepts.
• Monitoring and improving front-end performance.
• Documenting application changes and developing updates.

React.js Developer Requirements:

• Bachelor’s degree in Computer Science, Information Technology, or a similar field.
• Previous experience working as a React.js Developer.
• In-depth knowledge of JavaScript, CSS, HTML and front-end languages.
• Knowledge of REACT tools including React.js, Webpack, Enzyme, Redux, and Flux.
• Experience with user interface design.
• Knowledge of performance testing frameworks including Mocha and Jest.
• Experience with browser-based debugging and performance testing software.
• Excellent troubleshooting skills.
• Good project management skills.