
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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About company
It is a fast-growing SaaS startup in the customer onboarding category and has raised $21M in capital (https://twitter.com/RocketlaneHQ/status/1483821563195850753">we rapped about it!) from global VCs such as 8VC, Nexus Venture Partners, Matrix Partners India, and super angels like Gokul Rajaram and Girish Mathrubootham.
Thanks to the rapid early traction and customer love the product has garnered globally from the likes of LinkSquares, AppCues, ContractPodAI, Chargebee, parcelLab, etc., we have been recognized as a Leader in the Client Onboarding category on G2 within six months of product launch.
With a mission to deliver chaos-free, consistent, accelerated, and delightful customer journeys through its purpose-built software the company was founded in April 2020 by second-time entrepreneur trio - Srikrishnan, Vignesh, and Deepak. Previously, the trio built a successful in-app messaging startup that was acquired by Freshworks (NASDAQ: FRSH) in 2015.
We became the https://www.producthunt.com/posts/rocketlane"> #1 Product of the Day on Product Hunt on the day we launched it. We are now building a global and diverse workplace that will empower passionate problem-solvers to innovate, collaborate, do their best work, and see the next phase of hyper-growth together!
What’s the opportunity?
Are you a front-end developer looking to fast-track your learning and growth? Have you looked at world class products like Asana, Notion, or Airtable, and felt “I wish I were part of the early team that built these products”?
We’re a team that has previously built and rolled out globally successful SaaS products used by tens of thousands of customers. We’re laser focused on delivering a world class new product again, and looking for an ambitious front-end engineer to join our existing team of 9 engineers.
If it excites you to think of a fast paced start-up environment, building something big from scratch, breaking down new problems, creating well structured UI components, executing on pixel perfect design, paying great attention to every little interaction detail, and doing demos of your work every Friday with a happy and passionate team, then this is the right opportunity for you.
Some of the tech problems you get to work-on as a front-end developer would include building real-time collaboration experiences across our product, building live document editing and modern spreadsheet experiences from scratch, creating flexible new Kanban-style views of work tasks, and crafting cool new UI components and interactions that we will use across our product.
About you:
- Knowledge in the following areas
- React
- SPA Framework patterns
- Hands-on experience in HTML, CSS, SASS & Object Oriented Javascript
- Worked with features provided by browsers (Caching / Storage / Compatibility etc )
Nice to have:
- Familiarity with AWS
- Experience with startups or early stage teams
- Knowledge of module bundlers like Webpack
What’s in it for me?
- Great opportunity: Rocketlane genuinely cares about everyone we hire. You’ll learn new things and grow no matter how experienced you are; you will be working with founders who have more than three decades of collective experience in building significant B2B SaaS startups.
- Great team: Work with a world-class, high-velocity team that truly embodies the values of empathy, curiosity, and customer-centricity. Check out the https://www.linkedin.com/feed/hashtag/?keywords=rocketlane_meet_the_team">MTT(Meet The Team) videos on our LinkedIn.
- Great culture: An open, fun, and exciting startup culture that empowers its people to champion big problems with the freedom to think and innovate.
- Growth: You could easily and quickly transition into other sales roles you might like.
- Impact: You get to be part of a global, passionate team in a fast-paced and growth-oriented environment. The team has a work philosophy of being high on ambition, ownership, and a bias for action.
- Monetary rewards and benefits: Competitive salary, flexible leave policy, and more!

Company Background:
Founded in 2016, they are one of the leading online scheduling software companies in the world, with over 200,000 customers globally. They are a profitable, high-growth bootstrapped platform-as-a-product company with 50+ team members looking to grow to $50M in revenue in the next 3 years.
Loction: Remote (Expenses paid quarterly travel to Head Office)
About this job
We are looking for a Senior Software Engineer with 5+ years of experience in Angular and frontend application development. You will work with a team of problem solvers working collaboratively to build custom solutions. If you are excited to learn new things and thrive in a team-based culture, and if you are looking for hyper-growth in your career then this could be a place for you!
What will you do
- Work with the team to break user stories into tasks and delegate them to the team members.
- Write code that meets standard and delivery guidelines.
- Mentor other engineers on the team to develop high-quality software (including the use of static analysis tools, Testing frameworks, and code reviews)
- Analyze solutions and help implement engineering best practices.
- Work with Project Managers for timely delivery and forecast.
- Lead and mentor junior engineers on technical issues. Perform blameless RCAs when issues occur and take ownership to resolve issues.
- Work closely with backend engineers, DevOps, and QA teams for seamless delivery.
What you should have
- Strong experience with front-end technologies including Angular, Javascript and gRPC, RESTful APIs, etc
- Ability to write efficient, secure, well-documented, and clean code
- Proven ability to work with multiple teams, multitask and prioritize.
- Experience with Git, JIRA, and Agile working methodology
Benefits
- Competitive compensation
- A chance to work and contribute to company's low-code platform which is soon to be open-source.
- Endless career opportunities and multiple paths for career development - Paid parental and maternity leave
- Hospitalization, health, and life insurance, and accident coverage
- Flexible hours
- Remote working flexibility
- Transparency and visibility throughout a fast-paced, successful growth organization
So what happens next?
Once we receive your application our recruitment team will go through it personally and will set up a chat to know more about your experience and interests. If we think you could be a good addition to our company, we will connect you to our team including managers so you can learn more about the life at the company and your responsibilities. We always try to give candidates a smooth onboarding experience.

- 3-5 years of experience developing and implementing software applications.
- Previous experience working as a React.js Developer.
- Knowledge in e-Commerce domain will be a plus.
- 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 REST API's
- In-depth understanding of Javascript, the DOM, and relevant concepts.
- Knowledge of modern authorization mechanisms, such as JSON Web Token.
- Experience with user interface design.
- Proficient understanding of cross-browser compatibility issues and ways to work around them.
- Experience with browser-based debugging and performance testing software.
- Proficient understanding of code versioning tools, such as Git, Github.
- Excellent troubleshooting skills.
As a Front-end Developer, your responsibility would be to create visual elements that users see and interact within our web platform. This makes your role crucial for the success of the product. We are looking for an exceptional problem solver, with attention to details. You will be working closely with design, product management and development teams to create elegant, usable, responsive and interactive interfaces across multiple devices.
You must take responsible actions in ensuring the application is optimised both in terms of technology and in delivering the best educational content.
Responsibilities:
- Build web platform for our live tutoring platform
- Creating interactive learning activities for K12 students
- Work on upcoming products
Requirements:
- Great programming skills
- Fundamentals of JavaScript and ES modules, new ECMASCRIPT concepts
- Experience in ReactJS web app development (1-4 years)
Brownie Points:
- Good HTML and CSS skills
- Experience in React-Native app development
- Ability to work in small teams and wear multiple hats
Ono Labs Private Limited is committed to providing equal opportunities without any discrimination on the grounds of age, ancestry, marital status, color, physical or mental disability, origin, nationality, political affiliation, religion, race, gender, sexual orientation, and any other characteristics protected by applicable law, regulations, and ordinances.
Responsibilities
- Develop new user-facing features
- 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 web markup, including HTML5, CSS3
- Basic understanding of server-side CSS pre-processing platforms, such as LESS and SASS
- Proficient understanding of client-side scripting and JavaScript frameworks, including jQuery
- Good understanding and knowledge of advanced JavaScript libraries and frameworks, such as AngularJS, KnockoutJS, BackboneJS, ReactJS, DurandalJS etc.
- Good understanding of asynchronous request handling, partial page updates, and AJAX
- Basic knowledge of image authoring tools, to be able to crop, resize, or perform small adjustments on an image
- Proficient understanding of cross-browser compatibility issues and ways to work around them.
- Proficient understanding of code versioning tools, such as Git
- Good understanding of SEO principles and ensuring that application will adhere to them
Yearly salary range: ₹4L - ₹8L + Profit share bonus (see below)
All employees will receive a proportional yearly profit share based on their salary. In total, 10% of WhyDonate’s profits will be paid out to employees.
Job Description
We are looking for a full-time remote MEAN-stack Developer with 3+ years of experience.
You will be working on new features and maintenance of the WhyDonate platform. Code quality and scalability are a must. Besides writing new code, you will be fixing bugs and monitoring any new errors that come in. You will be working in a fully remote team of 10+ people.
WhyDonate is a product-based company that has been live since 2013. WhyDonate is a fundraising platform that helps charities and individuals to collect donations online.
Hiring Process
- Introduction interview
- Technical interview
- Test assessment
Must-haves
- 4+ years of Software development experience
- 3+ years of experience with Angular 2+ (or similar framework)
- Experience with REST API's
- Good English language and communication skills
Nice to have
- Experience with back-end development (Node.js)
- Experience with DevOps and Cloud Hosting (Cloudflare, CI/CD)
- Experience with mobile development (React-Native)
- Worked on multiple publicly released web applications
- Knowledge of Elasticsearch
- Knowledge of Redis
- Knowledge of JavaScript testing frameworks
Responsibilities
- Feature development
- Monitoring and fixing bugs
- Uptime, performance and security
- Architecture
- Code quality
- Work closely with our customers to understand their needs and build high-quality user interfaces.
- Build, test and ship dashboards using frameworks like React, ES6, and Webpack.
- Work with engineers and senior leadership to turn our vision into a tangible roadmap every quarter.
- Add positive energy in every meeting or interaction with your coworkers.
Minimum Qualifications
- B.E/B.Tech/M.Tech in CS/CE/IT
- Must-have requirements for candidates include proficiency in the following areas/aspects:
- Git version control system
- Ability to collaborate and communicate complex technical concepts.
- Experience working with charting libraries (i.e. ChartJS, Chartist, Grafana).
- Experience with ReactJS
- Experience building highly scalable, high performance, responsive web applications
- Experience in fundamental front end web technologies including but not limited to HTML, CSS, JavaScript - Minimum work experience 2 years
Languages/Frameworks
Javascript, React, HTML/CSS
Preferred Qualifications
- Experience building, adopting and maintaining RESTful APIs.
- A passion for all things UI and Front End
- Ability to work in a fast-paced and agile development environment
- Strong customer focus and obsession with quality
- Experience working with UI for data-heavy products.









