Senior Frontend 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.

UI Architect: UI Architect role will be part of e-Commerce Team building Single Page Application on React-Redux & NodeJS. This role will lead the team in Analysis, Application Architecture, Design, Integration, Testing, and Implementation of business and technical information technology solutions in using software development life cycle methodology. Responsibilities:  Responsive UI / Front End Development using front technologies including ReactJS, Redux, AngularJS, JavaScript, JQuery, HTML5, CSS3 & Webpack  Developing Singe Page Application (SPA) on ReactJS, Redux & NodeJS  Deep knowledge of ReactJS practices and commonly used modules based on extensive work experience  Communicating with external web services or integrations  Cooperating with the back-end developer in the process of building the RESTful API/headless architecture  Must have experience in front end optimizations including performance bottlenecks debugging and tuning  Must have experience in using tools like web page test & chrome developer tools for synthetic testing  Deep understanding of how a web request works end – end  Ensuring high performance on mobile and web browser  Follow and contribute to Agile/SCRUM activities (e.g. daily stand-ups, retrospectives, iteration planning, estimating/reporting, acceptance criteria definition, etc.)  Train and mentor juniors / freshers on front end technologies  Design and conceptualize any new front-end development 

Qualification and Experience:  Minimum 9 years of experience in UI Development and last 2 years into ReactJS development using Redux  Hands on experience in Single Page Application (SPA) Development using latest JavaScript frameworks (React and similar)  Awareness on what’s new in the frontend technology world  Ability to multi-task  Experience in e-Commerce & Banking domain candidate preferred  Should have experience in Performance Monitoring tools  Bachelor's and Master's (preferred) in Computer Science with Strong communication skills  Behavioural Skills - Excellent Verbal/Written Communication skills in the English Language, Influence/Impact on decision making, Customer Orientation, Team Leading skills, Solution-oriented Leadership skills, Visionary mind-set Location: Mumbai / Bengaluru

For more information please visit the website - http://www.logixal.com

Overview of the Job:

We are looking for developers who are passionate about working in a highly entrepreneurial setup

developing products for enterprise clients and vendors in the Supply chain finance paradigm.

You will join a dynamic and fast-paced environment and work with cross-functional teams to design, develop and build products that deliver the company’s vision and strategy.

Overview of the Function:

The incumbent will work closely with the engineering leads and engineering managers along

with the product team on deploying and testing existing and potential products.

The Product and Engineering team conceptualizes designing, develop and customize

products.

Reporting to:

The incumbent will be working closely with the Engineering Lead.

Best things about the job:

• Working in a highly entrepreneurial setup with a visionary team passionate to help scale new

heights of business success.

• Exposure to exploring limitless possibilities and ideas no matter how impossible they may

seem today.

Your Role:

• Manage design projects across the entire product lifecycle and multiple product launches

• Prioritizing and articulate product and product features, and working cross-functionally with

engineers, product manager and Design Team to bring these products and features to reality

• Hands-on with design and challenges in interfaces

• Rapidly produce multiple concepts and prototypes; knowing when to apply pixel-perfect

attention to detail, and when to make low-fi sketches and prototypes.

• Making things happen execute good ideas that come from team, and make sure that the

whole team is doing its best work.

• Comfortable in working for interface designing

Skill Set:

• Expert Knowledge on Angluar Framework (8 and above)

• Hands On expertise on HTMS , CSS and JS.

• 5 years professional experience writing full-stack REST-based applications.
• Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model.
• 2-4 years of experience working with reactJS.
• Thorough understanding of the core principles of ReactJS.
• Prior experience with popular React.js workflows (such as Flux or Redux).
• Knowledge of modern authorization mechanisms, such as JSON Web Token.
• Knowledge of Spring Boot, Spring Security, Spring JPA & Hibernate.
• Experience working with SQL and NoSQL databases.
• Adopted opinionated Restful web services design patterns.
• Knowledge of Application containerization technologies, including Dockers, Kubernetes , and cloud-vendor implementations (AWS, Azure, other).
• Ability to pick up and learn new technologies quickly.
• Strong verbal and written communication skills.

• 2-7 years of experience in Mobile application development domain
• A minimum 2 years of React native production level dev experience
• At least 2 React native published apps
• A firm grasp of the JavaScript language and its nuances, including ES6+ syntax
• An expert level knowledge of React Native, Redux, Rx & related stack
• An excellent knowledge of Tools
• Some native Android & iOS development experience (preferable)

• Building reusable components and front-end libraries for future use
• Translating designs and wireframes into high-quality code
• Optimizing components for maximum performance across a vast array of web-capable devices and browsers
• Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
• Experience with popular React.js workflows (such as Flux or Redux)
• Familiarity with newer specifications of EcmaScript
• Experience with data structure libraries (e.g., Immutable.js)
• Knowledge of isomorphic React is a plus
• Familiarity with RESTful APIs
• Knowledge of modern authorization mechanisms, such as JSON Web Token
• 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
• Ability to work through new and difficult React Native Issues and contribute to libraries as needed.
• Ability to create and maintain continuous integration and delivery of React Native applications.

We are an IIT Bombay incubated, healthcare start up developing a mobile based Ai technology to help reduce health risks for women during their pregnancy. Our Founders are Harvard and Columbia University alums with extensive experience in digital health in the US and India.

Mobile Development Engineer - React Native (Location: Mumbai)

Requirements:

2-4 years of experience on React Native. Good understanding of start up environment.

1.     Advanced knowledge of React Native.

2.     Excellent knowledge of React native libraries, Redux, HTML5, CSS3, JavaScript.

3.     Excellent knowledge on android and iOS UI design principles, patterns and best practices.

4.     Experience working with publishing on stores.

5.     Experience working with Rest APIs.

6.    Knowledge of integration and utilization of cloud services and payment systems.

7.    Should have played a key role in conceptualising to deployment of apps using React Native.

8    Project management, scheduling, allocation and delivery.

9.    Proven experience of agile development, sprint planning and backlog management.

10.   Keen focus on customer, excellent communication skills, with high level of responsiveness and responsibility.

Good to Have:

Full Stack experience.

Experience working on chat apps, community, and healthcare domain. 

Exposure or Interest in NLP, Machine Learning.