Sr Frontend Software Engineer

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.

1.       Strong knowledge in Front end scripting like EJS, JavaScript, Jquery

2.       Proficiency with fundamental front-end languages such as HTML, CSS.

3.       Familiarity with JavaScript frameworks such as Angular JS, React, and Amber.

4.       Proficiency with server-side languages such as Python / Ruby / Java / PHP/ .Net

5.       Good Understand with database technology such as MySQL, Oracle, and MongoDB.

• Strong analytical skills -ability to turn business requirements into technical concepts and code
• Minimum 3 years of experience in React(at least 3 projects)and familiar with modern React (Hooks, Context API)
• At least one PWA project
• Deep knowledge of Typescript (at least 2 years)
• Excellent problem solving and communication skills
• Used to writing automated tests with tools like Jest & Cypress
• Working with a ticketing tool like Jira
• Experience with SCRUM/Agile Development
• Experiences with NodeJS is a plus
• Experiences with Monorepositorys and Nx is a plus

JD for Below position-

Preferred Technical Expertise-

1. Expertise in front end web application development
2. Solid Understanding of Javascript, JQuery.
3. Experience in HTML, CSS and Bootstrap library is required.
4. Experience with Django Framework.
5. Experience with source code versioning tools such as GIT, Bitbucket etc.

Secondary Skills/Good to have Skills:

1. Experience in developing REST API is a plus.
2. Experience in Python Programming is a plus.
3. Experience in Pandas and Numpy Libraries is a plus.
4. Experience with SQL is a plus.
5. Experience with any cloud platform ( GCP is a plus )

Experience in years: 3+.  Less than 7.

Type: Individual contributor with good hands on proficiency.

Specifics:

• Writing HTML, CSS, and JavaScript. Being up on latest practices is a must, e.g., HTML5, CSS3, and ECMAScript 6 (minimum)
• Familiarity with a relevant and globally supported framework— both front-end and back-end, if necessary — React & React Native.
• Ideally, familiarity with CSS preprocessors, bundlers, and associated languages/syntaxes/libraries - Sass, Less, webpack
• Experience implementing testing platforms and unit tests
• Integrating front-end UI with the constructed API, using REST, GraphQL api

Soft skills:

• Appreciation for clean and well documented code

What you will do at Tradyl

• Partner with a highly skilled external consultancy and lead the effort of building a new modern front end to our website. 
• We use a no code platform for rapid development in this phase of our Journey. You will develop features on this platform. This might involve integration with back end APIs via REST.  
• Do short experiments: Example,  Evaluate a backend headless commerce software as a potential candidate for our backend tech stack.

• Ability to design the overall architecture of UI components of the web application.
• Maintain quality and ensure responsiveness of applications.
• Collaborate with the rest of the engineering team to design and launch new features.
• Maintain code integrity and organization.
• Experience working with graphic designers and converting designs to visual elements using JavaScript, HTML, and CSS.
• Understanding and implementation of security and data protection.
• Good problem-solving skills and willingness to learn new technology

Qualifications:-

• 2+ year track record of relevant work experience and a Computer Science or a related technical discipline is required
• Excellent knowledge of JavaScript
• Proficient experience in ReactJS.
• OOPS, Concept, and Data Structure like Queue, Stack, Tree, Linked List, etc.
• Good knowledge in working with REST APIs
• Knowledge of converting designs to working web pages using HTML and CSS.
• Experience in Architecture and delivery of web applications.
• Knowledge of code versioning tool – Git

Good to have:

• Experience in AngularJS
• Experience in server-side programming

• 2+ years of experience participating in the delivery of technology services.
• A proven ability to learn new applications & innovate in technology
• Strong Experience in technologies like Redux, React
• Demonstrable knowledge of web technologies including HTML, CSS, Javascript, AJAX etc
• Exposure to Node, Angular desirable
• Experience in common third-party APIs (Google Maps, Google Charts, etc)
• Passion for best design and coding practices and a desire to develop new bold ideas
• Experience in integrating, designing and developing solutions is desirable
• Experience with CI/CD and TDD is desirable

Technical Lead Typescript Front End Developer:

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• Good communication skills
• Strong background in developing mobile games using OOJS, JavaScript , Typescript, HTML and CSS
• Experience in gaming framework and libraries like Phaser and Create JS
• Knowledge of Object Oriented design patterns
• Experience in game development for mobile devices (IOS/Android browsers)
• Excellent analytical skills for debugging and problem solving
• Excellent problem solving skills and aptitude 
• Ability to review code and design. ​

• Knowledge of various JavaScript libraries available for developing games
• Knowledge of Node JS, NPM & Grunt
• Knowledge of Pixi JS & Cocos2d-x
• Basic knowledge about graphics manipulation software like Photoshop, gimp etc.
• Experience in game development for mobile devices browser (IOS/Android browsers)

Responsibilities

• Delivering a complete front end application
• Ensuring high performance on mobile and desktop
• Writing tested, idiomatic, and documented JavaScript, HTML and CSS
• Coordinating the workflow between the graphic designer, the HTML coder, and yourself
• Cooperating with the back-end developer in the process of building the RESTful API
• Communicating with external web services

Skills and Qualifications

• Proficiency with JavaScript and HTML5
• Professional, precise communication skills
• Deep knowledge of AngularJS practices and commonly used modules based on extensive work experience
• Creating self-contained, reusable, and testable modules and components
• Ensuring a clear dependency chain, in regard to the app logic as well as the file system
• Ability to provide SEO solutions for single page apps
• Extensive knowledge of CSS and JS methods for providing performant visual effects and keeping the framerate above 30fps at all times
• Thorough understanding of the responsibilities of the platform, database, API, caching layer, proxies, and other web services used in the system
• Validating user actions on the client side and providing responsive feedback
• Writing non-blocking code, and resorting to advanced techniques such as multi-threading, when needed
• Creating custom, general use modules and components which extend the elements and modules of core AngularJS
• Experience with all levels of operation available to the front-end, such as from creating XHRs in vanilla JS to using a custom wrapper around $resource
• Experience with building the infrastructure for serving the front-end app and assets
• Architecting and automating the build process for production, using task runners or scripts
• Documenting the code inline using JSDoc or other conventions
• Writing extensive unit tests using automated TDD tasks
• Creating e2e test suites for all components, and running them with Protractor (or a well reasoned alternative)
• Creating configuration, build, and test scripts for Continuous Integration environments