React UI 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.

Responsibilities

• Work in a fun and fast-paced environment.
• Participate in requirements gathering, design, development, QA, support.
• Communicate with different stakeholders such as QA, Project Managers and Product Owners
• Discover, evaluate, and implement new technologies to maximize development efficiency.
• Groom, mentor and upskill team members with modern technologies and development practices

Key Competencies:

• 5-8 Years of relevant experience in front-end development.
• At least 5-4 years of working experience with the React ecosystem.
• In-depth knowledge of TypeScript, CSS, and HTML.
• Strong proficiency in Vanilla JavaScript, DOM, Browser API’s and ES6 Features.
• Strong Knowledge of State Management with React and relevant workflows.
• Good Understanding of Modern frontend workflows with NPM, Webpack, Babel etc.
• Knowledge of modern programming paradigms like functional and reactive programming.
• Knowledge of testing frameworks including Chai, Mocha and Sinon or equivalent.
• Experience with using browser-based dev tools for trouble shooting and enhancing the performance.

Good to have skills:

• Knowledge of cloud-based services like AWS and GCP.
• Working knowledge of Video streaming and playback
• Knowledge of modern programming paradigms like functional and reactive programming.

TAPPP is building the next-generation digital platform by leveraging cell-based architecture to integrate technologies like Artificial Intelligence, Rules, Workflows, Microservices, FaaS (Function as a Service), Micro-frontends, and Micro apps to create a highly extensible and cutting-edge technology platform that brings together sports fans with broadcasters, sports teams, and sportsbooks to create a marketplace for all aspects of sports and we are available across platforms via the Web, Mobile, Roku, and Tablets.

Building out this brand presents significant product and engineering challenges. At the center of solving those challenges is the TAPPP Product Engineering team which is responsible for the TAPPP product end to end.

TAPPP is led by a very able leadership team drawn from Industry leaders from companies like ESPN, Amazon, Blackhawk, Kargocard, Visa, and many others.

Who are we looking for:

A coding enthusiast who loves writing elegant code and developing software systems.

As a Roku developer, you will be a part of the core product development team that is responsible for building high-performant components of the TAPPP platform.

Your responsibility:

• You will be responsible for designing, coding, reviewing, testing, and bug-fixing different modules of the software product that needs to work seamlessly across different environments.
• Write production-quality code in Brightscript / Scenegraph.
• Write unit-test code for robustness, including edge cases, usability and general reliability.
• You will work in an Agile team, working on the TAPPP revolutionary platform. 
• Interface with other teams and/or third-party vendors to assist in the deployment of applications on Roku platforms.

Mandatory technical skills:

• At least 3 years of experience in developing apps for Roku devices.
• Strong knowledge of BrightScript, SceneGraph, and core scripting languages like JS.
• Experience with REST APIs interaction and a strong understanding of client-server architectures.
• Experience with Media Playback, streaming concepts, HLS, and manifests.

Other

Strong independent contributor.

Comfortable working in a start-up environment.

The position is based in Pune(India).

React Developer

Company - PragetX Technologies LLP

Location - Ahmedabad 

Position – React Developer

Company Description:

PragetX is a software development and digital marketing company based in Ahmedabad and USA. We provide different types of IT services like Web and App Development, Custom Software Development, ERP Solutions, UI/UX Design, Cloud Solutions and Database Management. 

Along with IT services, we also provide Digital Marketing and Branding services like SEO, SEM, SMM, SMO, PPC, Affiliate and Email Marketing, Brand Design, Brand Management, Brand Marketing etc.

Job Overview:

We're looking for a React Developer to join our growing frontend team. As a React Developer, you will help develop the next generation of our apps using tools such as React.js, Redux, Enzyme and Webpack.

Responsibilities:

• Developing and implementing highly-responsive user interface components using React concepts.
• Developing and implementing front-end architecture to support user interface concepts.
• Building reusable components and front-end libraries for future use
• Ability to build apps and websites that are extremely sensitive.
• Create data visualization tools, libraries, and reusable code for prospects
• Integrate designs and wireframes within the application code
• Translate wireframes and designs into good quality code
• Good understanding of CSS libraries, GIT, Sigma, Adobe XD etc.
• 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
• Design and develop new custom components to meet project requirements

Skill Required:

• Minimum 1.5+ years of experience
• Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
• Thorough understanding of React.js and its core principles
• Experience with popular React.js workflows (such as Flux, Redux,Create React App, data structure libraries.
• Understanding of RESTful APIs/GraphQL, HTML/CSS, ES6 (variables and scoping, array methods) 
• Familiarity with modern front-end build pipelines and tools (CI/CD tools, DevOps, performance testing frameworks like Mocha, Node + NPM)
• Experience with common front-end development tools such as Babel, Webpack, NPM, etc.
• Ability to understand business requirements and translate them into technical requirements
• Familiarity with code versioning tools (such as Git, SVN, and Mercurial)

Qualification:

Degree in computer science

MCA

Why LiftOff? 

We at LiftOff specialize in product creation, for our main forte lies in helping Entrepreneurs realize their dream. We have helped businesses and entrepreneurs launch more than 70 plus products.

Many on the team are serial entrepreneurs and have had a history of successful exits.

• 5+ years of experience, working on frontend technologies
• Individual contributor - responsible for the design, coding, and unit testing
• Should have good working experience in React and React Native
• Should have a good understanding of state management in frontend/UI applications
• Proficiency in Javascript / ECMAScript 6+
• Creating custom, general-use modules, and components that extend the elements and modules of React
• Good knowledge of data structures, problem-solving / algorithms
• Knowledge of creating custom / reusable components
• Should know OOP Concepts

We are a group of passionate people driven by a set of core values. We strive to make every process transparent and have flexible work timings along with great startup culture and vibe. There are no job designations because its a flat hierarchy.

Work Profile:

• Delivering a complete front end application in Agular
• Ensuring high performance on mobile and browser with reusable and modular components spanning cross multiple projects
• Coordinating the workflow between the graphic designer, the HTML coder, and yourself
• Integrate with the back-end developer in the process of building the RESTful API
• Communicating with external web services for 3rd Party tools and services integration
• Requirement  
• 2+ years of experience and proficiency with Angular, JavaScript and HTML5
• Deep knowledge of Angular practices and commonly used modules based on extensive work experience
• Creating self-contained, reusable, and testable modules and components
• Ability to provide SEO solutions and optimization
• 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 Angular

We are looking for highly skilled candidates with experience in frontend programming and are comfortable in dealing with backend tools.

• 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 ReactJS 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.

An enthusiastic individual with the following skills. Please do not hesitate to apply if you do not match all of it. We are open to promising candidates who are passionate about their work and are team players.

• 6 to 9 years of strong design and development experience in building massively large-scale distributed internet systems and products.
• Previous experience working as a React.js Developer.
• In-depth knowledge of JavaScript, CSS, HTML, and front-end languages.
• Strong experience using a client side MVC framework such as NodeJS, ReactJS, or Redux.
• Experience with user interface design.
• Knowledge of performance testing frameworks including Mocha and Jest.
• Experience with browser-based debugging and performance testing software.
• Experience in responsive design, cross browser compatibility, and website performance.
• Knowledge of frontend CSS frameworks like Bootstrap, Material UI, and preprocessors like SASS and LESS.
• Experience with handling Services, RESTful, APIs (NodeJS preferably).

You will be working with top-quality engineers who have built one of the best employee engagement SaaS platforms. You will be reporting to the Engineering Head and working closely with the Architect and other leads.

A wholesome opportunity in a fast-paced environment that will enable you to juggle between concepts, yet maintain the quality of content, interact, and share your ideas and have loads of learning while at work. Work with a team of highly talented young professionals and enjoy the benefits of being at this Company

We look forward to connecting with you. As you may take time to review this opportunity, we will wait for a reasonable time of around 3-5 days before we screen the collected applications and start lining up job discussions with the hiring manager. We assure you that we will attempt to maintain a reasonable time window for successfully closing this requirement. The candidates will be kept informed and updated on the feedback and application status.

• Experience building ReactNative apps
• Prior experience building scalable web and mobile web apps
• working in a super fast moving product startup
• Experience working with server side rendering, websockets etc

• Work on the most modern tech stack at the frontier of two of the hottest technology trends: Video and Mar-tech.
• Market leading compensation: salary plus equity
• Opportunity to work with tech's best talent spread across 5 continents: team mates come from the likes of InMobi, Walmart, Goldman Sachs, BCG.
• An incredible culture with a great blend of hustle, productivity and a ton of fun.
• Fully remote! Work from home, Goa, Europe- wherever you want to be.
• Potential opportunities to travel to the US

• Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
• Thorough understanding of React.js and its core principles
• Prior experience with popular React.js workflows (such as Flux or Redux)
• Familiarity with more current specifications of EcmaScript
• Prior experience with data structure libraries (e.g., Immutable.js)
• Knowledge of isomorphic React is a plus
• Familiarity with RESTful APIs
• Familiarity with HTML / CSS
• GIT experience is a plus
• Knowledge of modern authorization mechanisms, such as JSON Web Token
• Familiarity with modern front-end build pipelines and tools
• Experience with common front-end development tools such as Babel, Webpack, NPM, etc.
• Ability to understand business requirements and translate them into technical requirements
• A knack for benchmarking and optimization
• Familiarity with code versioning tools

• If you are interested in creating a user-friendly environment by writing code and moving forward in your career, then this job is for you.
• Collaborate with back-end developers and web designers to improvenusability.
• Writing tested and idiomatic JavaScript, HTML and CSS.
• Present key milestone deliverables to peers and execute level stakeholders.
• Build reusable code and libraries for future use.
• Tech-savvy professional, who is curious about new digital technologies and aspires to combine usability with visual design.

1. Bachelor's Degree in Computer Science
2. 1-5 years of professional software development experience
3. Experience with ES2015+, React, Webpack/Rollup, CSS, Node.js, Object oriented JS, FP in JS, TDD/BDD, Git, CSS
4. Ability to write clean, effective code
5. Strong problem solving and troubleshooting skills
6. Ability to work independently in a fast-paced environment with frequent production releases
7. Understanding of performance and efficiency with a strong customer focus
8. Work cross functionally to collaborate with designers o iterate on the design and implementation of our product
9. Be empathetic towards customers and appreciate the user's experience