
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.

About iRage
About
At iRage, we harness the power of technology and quantitative finance to craft cutting-edge high-frequency trading systems and strategies. Our journey began in 2009, shortly after the introduction of Direct Market Access (DMA) in the Indian markets, which ushered in a new era of possibilities in algorithmic trading.
iRage was founded by a group of passionate quantitative trading professionals who saw the immense potential within this domain. Since our inception, we've been on a relentless pursuit of excellence, aiming to reshape the landscape of algorithmic trading in India.
When you join our team at iRage, you're not just an employee; you're an integral part of our mission to solve some of the most challenging engineering problems in the financial industry. You'll collaborate with exceptional programmers, quantitative analysts, and traders who share your enthusiasm for innovation.
Connect with the team
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The Opportunity:
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What You'll Do:
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You're a Great Fit If You:
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Why BeyondScale?
- Impact: Be a part of a revolutionary product that empowers service-based businesses to thrive.
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Build reusable code and libraries for future use
Ensure the technical feasibility of UI/UX designs
Optimize application for maximum speed and scalability
Assure that all user input is validated before submitting to back-end
Collaborate with other team members and stakeholders
Skills and Qualifications
Proficient understanding of markup language like HTML to create user friendly web pages
Strong experience in React JS
Proficient understanding of JavaScript, CSS and jQuery
Good experience of React native, algorithm and data structure
Good understanding of asynchronous request handling, partial page updates, and AJAX
Proficient understanding of cross-browser compatibility issues and ways to work around them.
Responsibilities:
- Review, Evaluate, and Validate technical requirements.
- Work and lead other team members to translate the requirements into final deliverables.
- Understand Storyboards and Visual mock-ups.
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- Ensure the deliverables meet Primathon standards, and guidelines.
- Developing your frontend capability in complex problems and expanding your horizon of technologies.
- Responsible for designing, coding and modifying web pages that are focused on content within the standards, guidelines and requirements of clients.
- Work with clients, and other team members as appropriate.
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- Work with CTO to keep on track with the project plan.
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Requirements:
- Experience with Frontend technologies (React.js ).
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Within Freshworks, our team is known by many names Frontend CoE, Frontend Platforms, and
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multiple products and scaled them to be highly performant.
We help develop tools and infrastructure services for the frontend tech stack that enables our product
teams to produce consistent and scalable applications on the web. Our goal is clear and
straightforward which is to create the next generation user experience of B2B SAAS.
When we are not building cross-platform features, we interact with frontend teams across the
company and provide expert opinions on various technology and scalability challenges. We
formulate best practices that are followed by teams across the organization.
We are builders and keepers of Crayons - Our own open-source design system is built on Web
components, making Crayons a truly cross-platform library of components and utilities.
We own the frontend performance analytics engine that is used by all the products across the company to track and measure the performance of our frontend system from initial load times to
Our team values a culture of inclusiveness, giving every team member the opportunity to share
opinions and pursue them based on collective alignment. We strongly believe that each one of us
should lift each other and success is achieved as a team.
What we are looking for?
A minimum of 7 years of relevant professional experience
You are very strong in web development fundamentals
You have worked on varied projects in the frontend area and thereby you have a broad
spectrum of exposure to building web-based products and solving problems in the frontend
space
You are extremely proactive and highly biased towards action and progress.
You are independent and self-driven
Responsibility
A well-rounded experience in building products and applications on the web.
Led a team to build highly maintainable web applications using Native JS and using any JS
library like React, ember etc.
Very comfortable with agile methodology and should have taken part in all the stages starting
from backlog management to sprint planning, managing team member’s sprint tasks to fully
delivering epics
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of review and PR workflows.
Should exhibit a strong capacity to deliver something regularly weekly or bi-weekly
Should have experience in collaborating with multiple cross-functional teams like design,
product management etc
Ability to distil specifications from different stakeholders and work with team members to
deliver epics on time with quality
Knowledge of how to make web applications performant by deploying to scaling
infrastructure such as CDN, Filestore etc.
Experience in building Accessible UI, including building applications that are optimized for keyboard, mouse and touch interactions.
Should have collaborated with Architects on the design and implementation of the frontend
application stack.
Nice to have
Experience in Micro frontend architecture and have built apps in this area
AWS systems that help in hosting and managing client infrastructure like S3, Cloudfront,
Lambda etc
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• Reviewing application requirements and interface designs.
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concepts.
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• Monitoring and improving front-end performance.
• Documenting application changes and developing updates.
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Requirements:
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