React Native 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.

• Bachelor's degree in Computer Science, Software Engineering, or a related field.
• 2 to 12 years of professional experience in React Native development.
• Strong proficiency in JavaScript, TypeScript, and modern web technologies.
• Experience working with RESTful APIs and integrating third-party libraries.
• Solid understanding of mobile app architecture and design patterns.
• Knowledge of mobile UI/UX best practices and principles.
• Familiarity with version control systems such as Git.

• Participate heavily in the brainstorming of UI/UX architecture and feature design
• Interface with external customers and key stakeholders to understand and document design requirements
• Work cross-functionally with Engineering, Data Science, Product, UX, BD, and Infrastructure teams
• Drive best coding practices across the company (i.e. documentation, code reviews, coding standards, etc)
• Perform security, legal, and license reviews of committed code
• Complete projects with little or no supervision from senior leadership

• Must have at least 2+ years experience in front-end web development with the following tools: HTML5, CSS, Webpack, Responsive web design, ReactJS (Components, Router, Redux, Flux, Chart Libraries i.e. Google Charts), Node.js, REST APIs, and other essential features)
• Built and deployed customer-facing services and products at scale
• Developed unit and integration tests
• Solid instruction-level understanding of Object Oriented design, data structures, and software engineering principles

• You have a strong background in natural language processing, statistical modeling, and/or machine learning
• Experience with open source projects in a startup environment
• Experience with large-scale distributed systems that have thousands of microservices and manages millions of transactions per day
• Worked on products where experimentation and data science are core to the development
• Experience with Python and API frameworks (Flask)
• BS, MS or equivalent

We are looking for a talented Front-end Engineer capable frontend developer to join OneFin!

Responsibilities

• Work closely with the design and backend team to build and develop web applications for our forward-thinking products.
• Design large-scale systems with high complexity to support our high throughput applications.
• Understand how to leverage infrastructure for solving such large-scale problems.
• Develop tools and contribute to open source wherever possible.
• Adopt problem-solving as a way of life - always go to the root cause.
• Develop scalable front-end engineering, for the largest FinTech companies in India who use our product.
• Actively think about improving UX and UI.
• Collaborate with the team to discuss and implement ideas.
• Build responsive, robust, and optimized applications.

• Professional development experience with Angular 10
• At least 1-3 years of JavaScript development experience for web applications.
• Strong eye for design, UI, and UX.
• Passion for front-end development.
• Willingness to learn and experiment with new technologies.

Ideally  from IIT, NIT, IIIT ,top colleges or hackers with project demonstrating exceptional problem solving capability.

Note : This job is for immediate joining. Please apply ONLY IF you can join immediately.

Experience :- Junior role : 1 to 3 years/Senior : 5 to 7 Years

Industry: FinTech / BFSI

Functional Area: Core Platform Programming, Maintenance

Role Category: Programming & Design

Role: Software Developer

Employment Type: Permanent Job, Full Time

Overview:

We are looking for a passionate, talented, and motivated UI/UX  Front End Angular Developer to join our team and help build out the next set of kick-ass features.

FE/UIX  Developer at Konectbox, you’ll deliver high-quality technical solutions to build UI/UX  using a range of different technologies. You’ll be involved in the entire product development lifecycle including the design, development, deployment and maintenance of new and existing features.

You should apply to us if you’re excited about working on the newest technologies and delivering value with a sense of ownership. If selected, you get to be a part of a small but committed group of technologists who are trying to improve how events are ticketed and marketed in India.

About the role:

• Highly skilled at front-end engineering using Object-Oriented JavaScript, various JavaScript libraries and micro frameworks (Angular, Prototype, Backbone), HTML and CSS
• Translates designs and style guides provided by the UI/UX team into functional user interfaces, ensuring
• Well versed in software engineering principles, frameworks and technologies
• Self-directed team player who thrives in a continually changing environment
• Builds mobile software applications Follows coding standards, builds appropriate unit tests, integration tests and deployment scripts
• Assists in defining architectures Collaborates with teams to explore existing systems, determines areas of complexity and learns the applications capabilities
• Owns success Takes responsibility for successful delivery of the solutions
• Communicates continually with the project teams Explains progress on the development effort
• cross browser compatibility and performance
• Contributes to continual improvement by suggesting improvements to user interface, software architecture or use of new technologies
• Nice to have : 
• Complete understanding of internal code library (jquery or any other)
• Some record of contribution to any front end open source project.

Perks :

• You get to work at a fun filled atmosphere
• Have ample chances of learning leadership, mentor-ship skills
• A solid salary package along with chance to get good value of ESOPs.

Salary Range : 6 LPA to 12 LPA 

(based on qualifications, experience and skills)

Key Skills : Javascript, Angular, Backbone, Prototype, HTML, CSS

Job Location- Pune

Experience – 4 to 7 Years 
Notice Period - Immediate preferred 

The Ideal Candidate-

This position is for UI Developers with hands-on experience in leading-edge technologies, looking to mark a niche in the software Industry

Essential Skills-
.

• Strong Command on Core Javascript, Core Java
• Strong Command on Angular JS and React JS
• Strong Knowledge of HTML5, CSS3 
• Highly Preferred, experience in D3, Canvas API 
• Ability to work on advanced javascript frameworks

If you are interested in an exciting role with learning and rewards, do apply. 

Design, build and Maintain advanced applications for the Android/iOS platform using Angular 6+

Strong Exp with  Angular 6+

Demonstrated expertise with HTML5, CSS3 & Responsive Web Design, jQuery or jQueryMobile and consuming REST APIs.

Highly skilled Javascript developer using backbone, angular or similar frameworks

Exp with node js, NoSql databases.

Published atleast 2 apps in Google play store and Apple app store.

Functional Area:IT Software - Application Programming , Maintenance

Location : Andheri West, Mumbai

Responsibilities:

• Responsible for development of new highly-responsive, web-based user interface
• Develop a flexible and well-structured front-end architecture, along with the APIs to support it 3.
• Building reusable components and front-end libraries for future use
• Translating designs and wire frames into high quality code
• Construct visualisations that are able to depict vast amounts of data
• Work with product team and graphic designers
• Learn and understand user interactions

Requirements:

• Deep knowledge of web standards
• Deep knowledge of JavaScript concepts and fundamentals
• Strong understanding of ReactJs. development, and its core principles
• Experience with popular React.js workflows (such as Flux or Redux)
• Experience of working with code versioning tools (such as Git, SVN)
• Familiarity with RESTful APIs
• Familiar with HTML, CSS and SCSS development
• Knowledge of bundlers such as Gulp/Web pack, ES6, Node etc..
• B.Tech from Tier 1 college.
• 3+ yrs of experience with front end technologies HTML and JavaScript
• 1+ yrs of Project experience with react