ReactJS Developer (ReactJS and Redux)

JD: React Frontend Engineer (Web)

Role: React Engineer – Real-Time Web Applications

We are building data-intensive, real-time web applications. We need engineers who can handle dynamic data, performance constraints, and complex UI states at scale.

What You’ll Do

• Build scalable frontend systems using React
• Handle real-time data flows (WebSockets, streaming updates)
• Optimize rendering performance for high-frequency updates
• Build reusable component systems and state management
• Work closely with backend teams on API design
• Ensure observability (logging, error tracking, performance metrics)

Must-Have Skills

• Strong experience in React (hooks, state management)
• Experience with:
• Real-time data handling
• Large datasets / dynamic UI
• Performance optimization:
• Memoization, virtualization, rendering control
• Solid understanding of:
• Browser performance
• Network behavior

Good-to-Have

• Experience with dashboards / analytics tools
• Experience in streaming or content platforms
• Familiarity with WebRTC or RTC integrations
• Experience with SSR (Next.js)

What We Value

• Ability to handle high-frequency UI updates without lag
• Strong debugging and profiling mindset
• Clean architecture and reusable design systems

The Opportunity At Certa, we are building the AI-native Operating System for global enterprise relationships. We have the clients (Fortune 100/500) and the robust backend technology. Now, under the guidance of our new Head of Design, we are elevating our experience to match the best consumer products in the world. We are looking for our First Design Engineer. You are the "missing link" between our pragmatic engineering requirements and our ambitious design vision. You won't just implement tickets; you will define how our product feels.

The Role This is not a standard Frontend Engineer role, nor is it a Product Designer role. This role is equal parts: Craft-focused Frontend Engineering: You write production-grade code, but you obsess over the details that others miss. Systems Thinking: You don't just build components; you build the architecture (Design System) that allows the rest of the team to build beautiful UI faster. Figma-to-Code Mastery: You bridge the gap between static Figma files and dynamic browser realities, moving fluidly between design and implementation.

What You Will Do

1. Architect the Design System & UI Patterns Take ownership of our internal design system. You will treat it as an internal product, creating a type-safe, accessible, and composable library in React & TypeScript. Manage the tokens, components, patterns, documentation, and governance required to scale design across a remote engineering team. Bridge the gap between Figma Variables/Tokens and code, ensuring a single source of truth for our visual language.
2. Make AI-Native UX Feel Trustworthy & Human Implement interaction patterns specifically for AI workflows: streaming states, progressive disclosure, and optimistic UI. Build for "explainability" and human-in-the-loop controls, ensuring users trust the system even when it automates complex tasks. Make complexity feel simple—especially when the system is performing sophisticated "smart" operations in the background.
3. Maximize Output with AI-Assisted Tooling Hyper-automate the mundane: Use AI coding assistants (Cursor, Copilot, etc.) to handle boilerplate and scaffolding, allowing you to spend 80% of your time on the 20% of the "feel" and "craft." Build tooling and guardrails (linting rules, visual checks, component playground workflows) that help the team ship high-fidelity UI consistently.
4. Bridge Design & Code (Figma-First) Live in Figma: You are expected to be as comfortable in Figma as you are in VS Code. You’ll tweak layouts, design missing states, and refine prototypes yourself. Push performance beyond just metrics: focus on rendering, bundle size, perceived speed, and interaction responsiveness. Raise the bar on accessibility and cross-browser behavior, ensuring the product is usable by everyone.

Must Haves

1. Expert Figma Skills: This is a primary requirement. You should be fluent in auto-layout, components, variables, and prototyping. You view Figma as a design environment and a technical spec.
2. AI-Assisted Workflow: You are a "power user" of AI tools (Cursor, Copilot, v0, etc.). You know how to leverage AI to move faster without sacrificing the quality of the final output.
3. Strong Frontend Foundation: Deep expertise in React + TypeScript with a track record of shipping complex, data-heavy UIs in production.
4. Demonstrated UI Craft: A portfolio showing obsession with spacing, typography, interaction detail, and motion. You likely have a "Folder of Inspiration" from the best apps in the world.
5. Design System Experience: Strong experience building and maintaining a design system: tokens, components, patterns, and documentation.
6. Accessibility Expertise: You build keyboard-first UX, understand screen reader behavior, and enforce correct ARIA usage by default.
7. Modern Tooling: Experience with Vite and modern frontend tooling; comfortable setting up and customizing JS tooling/build systems.

Why You? (The "Craft" Factor)

1. You are inspired by the design-engineering cultures of companies like Linear, Vercel, Family, or Arc (The Browser Company).
2. You get annoyed when a modal closes without an exit animation.
3. You understand that latency is a UX problem, and you use optimistic UI updates to make the app feel instant.
4. You believe enterprise software doesn't have to look like a spreadsheet from 2005—it should feel as fluid as the best consumer apps.
5. You are an "AI-augmented" engineer who uses modern tools to do the work of three people while maintaining the taste of an artisan.

React JS Developers

Experience: 3-6 Years

Location: Bangalore (onsite)

Responsibilities:

Design and implement user interface components for JavaScript-based web applications

using React JS

 Work as a part of a small team that includes other react JS developers, designers, QA

experts, and managers

 Build app and UI components from prototypes and wireframes

 Built REST APIs for tight integrations with the Backend

 Write automated tests to ensure error-free code and performance

 Improve front-end performance by eliminating performance bottlenecks

 Create front-end modules with maximum code reusability and efficiency

 Work with third-party dependencies and APIs

 Work with Redux architecture to improve the performance of the websites/mobile apps

 Coordinate with the cross-functional teams to build apps in the stipulated time/budget

 Knowledge of TypeScript 

 Knowledge of HTML, JavaScript, CSS, Bootstrap

 React routing, React Hooks, Internationalization

The ideal candidate will have at least 2 years of experience in developing scalable and responsive web

applications, and will be able to work collaboratively with other developers and stakeholders to deliver

high-quality software products.

Responsibilities

● Develop and maintain responsive and scalable web applications using React and JavaScript

● Write clean, efficient, and maintainable code that adheres to coding standards and best practices

● Collaborate with other developers and stakeholders to design and implement software solutions

that meet business requirements

● Work with UX/UI designers to implement user interfaces that are intuitive and visually appealing

● Optimize web applications for maximum speed and scalability

● Participate in code reviews, testing, and debugging to ensure that the software meets quality

standards

● Stay up-to-date with the latest industry trends and technologies, and make recommendations to

the company on how to best incorporate them into its products and services

● Proficient in client & server-side JavaScript, HTML5, CSS3 and webpack

● Competent in building single page web applications using Node.js and React Js

● Redux for state management

● Universal rendering (Client-side rendering and Server-side rendering)

● Experience with cross-browser, cross-platform, and design constraints on the web

● Experience in developing automated unit and functional tests

● Experience in an agile development process

● Solid knowledge of algorithms and design patterns

● Have a passion for quality and writing clean, readable code that scales and performs well

● Good interpersonal communication skills

Desired Candidate Profile

● At least 2 years of experience in developing web applications using React/NextJS/VueJs and

JavaScript

JOB DESCRIPTION

About Company:-
It's digital consultancy that partners with the world’s leading brands to design and deliver compelling digital products and services for their customers & digital engagement provider for more than 200 of the world’s leading brands. We are a collective of consultants, designers, developers, cloud advisors, and data scientists – spread across 3 continents and 9 offices - who create compelling digital experiences to help clients show they care to the people who matter most - their consumers, patients, and employees.

Required Skills:-

-Should have 2+ years of hands on development experience with a degree in computer science, related to information technology, ideally with the focus on banking and wealth management.

-Should have spent most of the career in development

- Hands-on experience in Backbase

- Hands-on experience in Java

- Proficiency in understanding the application architecture

- Able to customize based on the demand and working to coding standards to ensure a robust and mature, development of the functionality within the platform.

-Independently design Responsive design

-Backbase CXP (customer experience portal), CXP Web Library (built-in JS)

-RESTful web services

-HTML5, JS frameworks like JQuery, Angular JS, Bootstrap JS

 -CSS (cascading style-sheets)

-Experience working with Servlets, Filters, Listeners and data sources

-Security, User Access ControlGood to have

• Maven
• Any Source code repository like SVN, Git, etc
• Resolving cross browser compatibility issues
• Resolving page load / performance issues
• Experience working with templates (JSP, Google Closure Tools for RIA, Mustache), Backbase widgets, Caches

Location :- Ahmedabad

Preffered companies:-

Variyas Global Solutions Inc
Capgemini
TCS 
Accenture
IBM
BlueRose Technologies Pvt. Ltd
Xebia 
Sellcraft Global Solutions

Responsibilities:

- Creating the website architecture.

- Designing and building the website front-end.

- Managing website back-end including database and server integration.

- Managing WordPress themes and plugins.

- Conducting website performance tests.

- Troubleshooting content issues.

- Monitoring the performance of the live website.

Skill Requirements:

- Proven work experience as a WordPress developer.

- Knowledge of front-end technologies including CSS3, JavaScript, HTML5, and jQuery.

- Knowledge of code version tools including Git, Mercurial, and SVN.

- Experience working with debugging tools such as Chrome Inspector and Firebug.

- Good understanding of website architecture and aesthetics.

- Ability to manage projects.

- Good communication skills.

- Bachelor’s degree in computer science or a similar field.

• Expertise in React tools including React.js, Webpack, Babel, Redux/Flux, React router.
• In-depth knowledge of JavaScript, CSS, HTML, and front-end languages.
• Practised in any one CSS frameworks like material UI, Semantic UI, Bootstrap, ANT design.
• Experient working on web API like RESTful Web services, • Proficiency in using Graphql, WebSocket, webhooks.
• Should be able to design and build modern user interfaces to enhance application performance.
• Hands-on experience in browser-based debugging, performance testing software and deployment, with an attention to detail that supports the software development cycle.
• Experience with automated testing suites, like Jest or Mocha
• Experience in an Agile environment