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.

Front end Developer : (Group Manager )

Job Description

Join our product development team to develop our web applications

You are a creative web programmer that will focus on the front-end development and design, but also assist as needed with back-end development if needed.

Design, production, modification, and maintenance of web application’s user interface

Assist with the development and implementation of new features

Work with back-end developers to implement front-end and user interface requirements

Work with team on designing new interfaces to programs

Thoroughly document design and implemented code

Qualifications

- B.E. or B. Tech or MCA

- 5 to 8+ years of overall experience

5 years of frontend web application development

Proficient understanding of web markup, including HTML5, CSS3

Proficient understanding of client-side scripting and JavaScript frameworks, including jQuery. Strong understanding of JavaScript

Good working experience of any of advanced JavaScript libraries and frameworks such as AngularJS, KnockoutJS, BackboneJS, ReactJS

Good understanding of asynchronous request handling, partial page updates, and AJAX

Proficient understanding of code versioning tools GIT/SVN

Good understanding of browser rendering behavior and performance

Good knowledge of charting any frameworks like Highcharts, Highmaps or D3JS

Working with and leveraging cloud PaaS components for front end delivery

Experience in any server-side programming is a plus

Familiarity with Visio, Basic knowledge of image authoring tools, to be able to crop, resize, or perform small adjustments on an image is a plus.

UPCRED powers AI-Recommendation on Social Content Creators, helping them discover content monetisation and helping Brands/Businesses explore Influencer Marketing.

The company’s advert platform is powered by artificial intelligence, which is used by businesses for Influencer Discovery, Campaign Management, and Campaign Analytics through UPCRED Pixel Management.

Our technology visions to have one-third of the world's social consumers discover new things through recommendation feeds from their favourite social media creator and which connects advertisers to these audiences to grow their business.

UPCRED Social has long-term partnerships with a variety of digital content creators and has the vision to democratize the social earning for content creators in India.

UPCRED Advert wants to be an all-in-one influencer marketing platform designed to help businesses own their influencer relationships.

Responsibilities:

The React Developer will own and drive web development—including decisions about tools, technologies, and processes - for UPCRED.

This is an incredible opportunity for anyone interested in being a part of a high-performing, fast team with a massive learning curve. Our team moves fast and develops world-class products by pushing the boundaries of React development. If hired, you will be part of UPCRED's in-house Product & Engineering team.

Develop cross-browser & cross platform supported web applications in React which customers love using.

Work with product, design, backend teams to develop features.

Work on bindings and integrations required with react libraries & REST api's.

Plan, estimate, and delivery your project with minimal supervision.

Skills:

1 - 5 years of React experience with some hands-on experience with web application development.

Experience with React Ecosystem (React Router, Styled-components, Server-side rendering, Context API, React Hooks) is strongly preferred.

Experience with state management libraries such as Redux or MobX is a huge plus.

Proficient understanding of cross-browser compatibility issues and ways to work around such issues

Understanding of REST APIs, the document request model, offline storage, state

management.

Experience with Content/Video-based website.

Understanding of Social Video-based web Architecture

HOW?

Apply, and let us know your interest?

UPCRED, that's how we grow, fair and transparent!

Note: Candidates who is having a notice period of more than 45 do not apply

We are looking for a Front end Engineer with at least 1 year of experience. with a fast-moving organisation based out of Mumbai, India.

Skills Required:-

• java script
• React
• React native
• Knowledge of Angular, HTML/CSS3 is a plus
  
  

Roles and Responsibilities:-

• Develop new user-facing features.
• Defining Architecture & Flow for the enterprise-level project
• Writing reusable code and libraries for future use.
• Ability to write clean code with proper comments
• Ensure the technical feasibility of UI/UX designs.
• Optimise application for maximum speed and scalability.
• Integrating API's
• Excellent Debugging Skills
• Great Problem-Solving Skills
• knowledge of best practices in javascript framework and the ability to implement it
• Helping others if they got stuck with any problem

Profile Overview:

We are looking for passionate and keen-eyed front-end developers with 5+ years of experience in React JS for a major project to join our creative front-end development team who can add optimization and efficiency to the user experience and maintain brand consistency across all web page of the web products.

The front-end developer will closely coordinate with our back-end developers, graphic designers and UI designers to ensure all elements of the web creation are consistent.

Responsibilities:

• Turning UI/UX designs into prototypes, creating excellent interactive forms of designs, writing reusable modules and maintainability of the code.

• Implement UI development principles to ensure that the product client-side serves at scale.

• Review and optimize the application usage by monitoring key metrics and rectifying the issues proactively.

• Determining the structure and design of web pages.

• Ensuring user experience by analyzing the design choices.

• Developing features to enhance the user experience.

• Striking balance between functional and aesthetic design.

Requirements:

• Bachelor’s or Master’s degree in computer science, computer applications or related fields.
• Proven working experience as a React Developer for 5+ years and above.
• Hands-on experience with HTML5, CSS3, and  CSS frameworks.
• Demonstrable knowledge of Web services, Web API, REST services & GraphQL.
• Expertise in UI design and development of responsive web applications using React, Redux, Flask and Hooks.
• Applicable knowledge of Social API integration, Core location APIs, Web Views, Payments integration
• Proficiency in understanding layout aesthetics.
• Excellent analytical, problem-solving and multitasking skills.
• Ability to solve novel and challenging React problems.
• Capability to understand, develop and sustain continuous integration and delivery.

We are looking for a React Native developer interested in building performant mobile apps on both the iOS and Android platforms. You will be responsible for architecting and building these 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
Build pixel-perfect, buttery smooth UIs across both mobile platforms.
Leverage native APIs for deep integrations with both platforms.
Diagnose and fix bugs and performance bottlenecks for performance that feels native.
Reach out to the open-source community to encourage and help implement mission-critical software fixes—React Native moves fast and often breaks things.
Maintain code and write automated tests to ensure the product is of the highest quality.
Transition existing React web apps to React Native.

Skills
Firm grasp of the JavaScript, TypeScript, ClojureScript language and its nuances, including ES6+ syntax Knowledge of functional or object-oriented programming
Ability to write well-documented, clean Javascript code
Rock-solid at working with third-party dependencies and debugging dependency conflicts
Familiarity with native build tools, like XCode, Gradle Android Studio, IntelliJ
Understanding of REST APIs, the document request model, and offline storage
Experience with automated testing suites, like Jest or Mocha