Senior ReactJS Frontend Engineer at Wishberry

Job Title: Senior Software Engineer – Frontend

About the Role

We are looking for a highly skilled Senior Frontend Engineer to join our fast-growing product engineering team. As a senior contributor, you will play a key role in designing, building, and scaling modern, intuitive, and performant web applications that delight our users. You will collaborate closely with product managers, designers, and backend engineers to bring ideas to life—while mentoring junior engineers and driving best practices across the frontend discipline.

Key Responsibilities

• Build & Deliver: Design, develop, and maintain high-quality, scalable, and responsive web applications using React.js and modern JavaScript/TypeScript.
• Own the Frontend: Drive architecture decisions, contribute to reusable component libraries, and ensure the frontend stack remains cutting-edge.
• Collaborate: Work with cross-functional teams (Product, Design, Backend) to translate business needs into elegant technical solutions.
• Performance & UX: Optimize applications for maximum speed, responsiveness, accessibility, and seamless user experience.
• Best Practices: Champion code quality through code reviews, automated testing, CI/CD pipelines, and documentation.
• Mentorship: Provide technical guidance, support, and mentorship to junior and mid-level engineers.
• Innovation: Stay current with frontend technologies, tools, and frameworks, continuously improving how we build software.

What We’re Looking For

• Bachelor’s degree in Computer Science, Engineering, or related field (or equivalent experience).
• 5–8 years of professional experience in frontend or full-stack software development.
• Deep expertise in React.js, JavaScript (ES6+), and modern frontend ecosystems (Webpack, Babel, NPM/Yarn, etc.).
• Solid understanding of data structures, algorithms, and software design patterns.
• Strong experience with unit testing, debugging, and performance profiling.
• Familiarity with RESTful APIs, and micro-frontend architectures is a plus.
• Experience working in Agile/Scrum environments.
• Excellent problem-solving skills, with strong attention to detail and a focus on delivering value.
• Strong communication and collaboration skills, with a passion for teamwork.

Why Join Us

• Opportunity to own impactful projects end-to-end, from ideation to deployment.
• A culture that values technical excellence, continuous learning, and innovation.
• Work alongside talented engineers and thought leaders in a fast-paced, growth-oriented environment.
• Competitive compensation, flexible work options, and comprehensive benefits.

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.

We are looking for a passionate Senior Software Engineer - UI/UX to join our fast growing team at LogiNext. You’ll collaborate with Product Managers and other UI designers to design new features, translate concepts into living and breathing prototypes, and rapidly iterate on interactions, animations, and details to deliver the best user experience. You will be responsible for conceptualizing & creating highly interactive user interfaces across all supported platforms.

You are passionate about design and are driven to create solutions for our clients that combine business objectives, design principles, and continuous user research into a compelling user experience. You have experience in designing a consistent and adaptable platform-based approach to user experience within a technology-driven and Software-as-a-Service (SaaS) based environment. You are a compulsive problem-solver with excellent visualization and communication skills.

Responsibilities:

• Gather, analyse & process data to determine the user needs & enhance the user experience
• Research & learn new, or re- emerging front- end technologies that facilitate improved user experience.
• Conceptualise designs through storyboards & concept presentations
• Design beautiful digital interfaces and present ideas in a compelling manner
• Perform usability testing with prototypes
• Create wireframes & prototypes to create a perfect user interface
• Create the best visual communication design with graphic design, website design, drawing and illustration, animation, client discussion and standard layouts.
• Mentor other team members in conceptualising and visually articulating design solutions
•  

Requirements:

• Bachelor’s degree or higher in Arts/Commerce/Science/Technology
• 4 to 7 years of experience in UI/UX designing
• Must have experience in designing user interfaces for B2B SaaS Products
• Must have excellent experience using tools such as Sketch, Photoshop, Adobe Illustrator
• Able to work and thrive in a fast-paced, rapidly changing work environment
• Should have excellent communication skills, with an ability to convey ideas clearly & precisely
• Must have leadership skills & a good team player
• Must be pro-active & a self-starter

Type, Location

Full-time, Remote

Desired Experience

2+ years

Roles and Responsibilities :

● A great JavaScript developer who is proficient with React.js (preferred).

● Your primary focus will be on developing user interface components and implementing

them following well-known React.js workflows (such as Flux or Redux).

● You will ensure that these components and the overall application are robust and easy to

maintain.

● You will coordinate with the rest of the team working on different layers of the

infrastructure. Therefore, a commitment to collaborative problem-solving, sophisticated

design, and a quality product is important.

● Generating error-free code and compliance with SOW

● Managing development processes & working notes

● Growing technical skills and being an active part of the technical transformation in the company

● When required manage client communication for projects assigned

● Reporting on project activities and ensuring timely completion of projects/assignments

● Guiding Jr. Developers for the completion of their work

Desired Candidate Profile

Primary Skills :

● Hands-on experience in React.js, HTML/CSS, JavaScript, and People Management.

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.

Job Requirements :

- Advanced Javascript, CSS, HTML 5, Sass, Less, JSON, DOM Concepts

- Candidate should have 2-3 years of regular working experience.

- Must have expertise in React js, Redux, node js, ExpressJS MongoDB, MySql, NoSQL Flux,

javascript html5 core concepts.

-Fluent in responsive design and mobile / tablet UI / UX, HTML5, CSS3 along with

bootstrap

-UI Performance: should have hands-on experience of optimizing page load, rendering,

caching.

- Familiarity and experience with Container architecture - Docker/Jenkins and build scripts,

help maintain code quality, organisation, and automation

- Must have done multiple projects using React js, Redux, node js, and MongoDB with

Cross browser/device compatibility.

-Working Knowledge of common Javascript Libraries such as jQuery.

-Working understanding of Webpack, Babel & other pre-processing tools.

-Good Understanding of REST Apis

-Good understanding of AJAX and its UI implications

- Good knowledge of events handling in client-side and server-side.

- Good knowledge of code versioning tools, such as Git/bitbucket

- Good logical and mathematical programming skills with good communication skills.

- At Least 2-3 live projects

- NodeJS knowledge is a plus

-Good hands-on experience with ES6 & knowledge of the upcoming syntax of ECMAScript.

-Huge plus if you have experience in working with state management libraries like Redux, MobX etc. in React.js.

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, Saga, Thunk and Webpack. You should be familiar with React and its ecosystem. Past experience with a React codebase is a requirement.

We're looking for someone who is comfortable with a fast-moving environment and can learn quickly.

• Develop new components and features for our frontend app(s)
• Write, audit, and improve our test coverage
• Document and refactor our frontend codebase
• Profile and improve our frontend performance
• Write about your work and contribute back to open source

While these requirements are a guideline, feel free to apply even if you don't meet some of these.

• 3+ years’ experience working with a Javascript framework, preferably React
• In-depth understanding of Javascript, the DOM, and relevant concepts
• In-depth understanding of Redux/React Hooks/Saga/Thunk
• Proficiency with browser based debugging and performance testing
• Understanding of progressive web apps
• Experience with a testing framework (Jest/Mocha)
• Experience using Git
• Excellent communication skills, both written and verbal

Responsibilities 
- Develop new user-facing features 
- Ensure the technical feasibility of UI/UX designs 
- Optimize application for maximum speed

Skills And Qualifications 
- 2+ years of experience in ReactJS and Redux 
- 1+ completed project of reasonable size using server-side rendering 
- Knowledge of Preact is a plus 
- Proficient understanding of web markup, including HTML5, CSS3 
- Basic understanding of server-side CSS pre-processing platforms, such as LESS and SASS 
- Good understanding of asynchronous request handling, partial page updates, and AJAX 
- Proficient understanding of cross-browser compatibility issues and ways to work around them. 
- Proficient understanding of Git