React.js Developer

Ideal Candidate

8+ years of experience in front-end development, with at least 3–5 years in technical/architectural leadership roles across web and mobile platforms.

Expert in React.js and React Native, with hands-on experience designing and building scalable, modular applications using modern front-end frameworks and reusable component libraries.

Strong geospatial capabilities—proven experience integrating and optimizing mapping solutions (e.g., Google Maps, HERE Maps) with features like routing, clustering, and overlays.

Mobile-first mindset, with deep knowledge of responsive UI design, performance optimization for low-bandwidth environments, and cross-platform compatibility.

Architectural expertise in modular design, micro-frontends, SSR/SSG, PWAs, and cross-platform solutions—ideally with experience in monorepo environments and BFF patterns.

Technical leadership skills, including mentoring developers, enforcing best practices, driving autonomous development, and aligning technical solutions with business needs.

CI/CD & DevOps familiarity—strong understanding of build tools (Webpack, Vite, Metro), containerization (Docker), and deployment automation using Jenkins, GitLab CI, etc.

Security, accessibility, and testing focus—capable of implementing WCAG-compliant UIs, secure data handling, and robust test strategies using tools like Jest, Cypress, Detox, and Appium

Who are we :

Trendlyne, an Series-A funded, profitable products startup in the financial markets space with cutting edge analytics products aimed at businesses in stock markets and mutual funds.

Our founders are IIT + IIM graduates, with strong tech, analytics and marketing experience. We have top finance and management experts on the Board of Directors.

What do we do :

We build powerful analytics products in the stock market space that are best in class. Organic growth in B2B and B2C products have already made the company profitable. We deliver 800 million+ APIs every month to B2B customers.

Trendlyne analytics deals with 100s of millions rows of data to generate insights, scores and visualisations which are an industry benchmark.

Technical Skills Required :

- Hands-on development experience on ReactJS, React Native

- Excellent front-end development skills - Javascript ES6, HTML5, CSS3, Bootstrap/Flex

- Excellent understanding of web browsers, mobile browsers and responsiveness

- Experience in UI Build using Webpack/ Gulp

- Proficient understanding of code versioning tools, such as Git, Bitbucket, Github

- Proficient understanding of the performance of web and mobile applications

- Knowledge of Django web framework or Python will be an added advantage

Responsibilities :

- Develop new user-facing features, web and mobile applications

- Use HTML, CSS, JS, to deliver front-end of projects on time

- Work with UI & UX designers and project managers to ensure timely delivery of code

- Work with Backend developers and ensure smooth integration with CMS or APIs

- Build reusable code and libraries for future use

- Ensure the technical feasibility of UI/UX designs

- Optimize website for maximum speed and scalability

- As part of the core team, you will be working on cutting edge technologies like Spark, Flume, online backtesting and data visualization, and machine learning.

- All Developers will be involved with the entire lifecycle of the product right from product conceptualization, design, implementation and mobile app and web delivery.

- Salary on par with the industry, with company equity.

Responsibilities include:

• You will design and build web applications
• Collaborate with cross-functional teams to define, design, and ship new features
• Do Unit-test code for robustness, including edge cases, usability, and general reliability
• Participate in all phases of development, from design to implementation, unit testing, and release.
• In close collaboration with project teams, you will have the chance to redefine the development process for modern web-based applications.
• You will work highly customer-focused and be given the time to learn and experiment with the latest frontend technologies

ESSENTIAL SKILLS / EXPERIENCE REQUIRED:

• Bachelor's degree in Computer Science or equivalent
• 3 - 8 years of experience
• Experience in HTML, JavaScript, CSS, and JavaScript frameworks.
• Experience with the latest frontend technologies (e.g. ECMAScript, Webpack, ESLint, Service workers, etc.)
• In-depth knowledge of at least one JavaScript framework (e.g. React, Vue, Angular, etc.)
• Experience or Knowledge of web application optimizations.

We are looking for a front-end developer who will be responsible for developing and designing front-end web architecture, ensuring the responsiveness of applications, and working alongside graphic designers for web design features, among other duties.

Roles & Responsibilities:

● Develop and implement responsive and intuitive user interfaces for web applications using HTML, CSS, and JavaScript frameworks (e.g., React, Angular, Vue.js, Node.js)."

● Designing user interactions on web pages.

● Developing SDKs.

● Ensuring cross-platform optimization for mobile phones.

● Collaborate with UI/UX designers, back-end developers, and other stakeholders to transform design concepts into functional, feature-rich web interfaces

● Designing and developing APIs.

● Meeting both technical and consumer needs.

● Collaborate in an Agile development environment, participating in sprint planning, stand-ups, and other team meetings.

Qualifications & Skills:

● 5-9 years of experience in the relevant field.

● Proficiency with fundamental front-end languages such as HTML, CSS, and

JavaScript/Typescript

● Proficiency with JavaScript frameworks such as React-JS.

● Familiarity with database technology such as MySQL or Postgres.

● Knowledge of GitHUb, Docker,Project Versioning,SCSS/SASS style framework will be an added advantage

● Excellent verbal communication skills.

● Good problem-solving skills..

● Attention to details.

Why should you join:

● You prefer working in small groups. We're a start-up, and we think smaller teams have a lot of power. There is less management overhead and more discussion about the important work

● You care about the end-user and developer experience, as well as how the backend affects them. Rather than taking the path of least resistance, work backwards from what the user experience requires

● We offer competitive pay (above market average). We've received adequate funding from a number of well-known fintech investors, and we're planning to stay in the game for the long haul. It will be an exciting and interesting adventure ahead, and we are looking forward to working with some fantastic teammates!

What's on offer:

● Best in class compensation package

● Stock options for long term wealth creation

● Group health insurance that covers your family

● A vibrant, open and fun work culture

• Great knowledge of Javascript
• Minimum experience of 6 months to 1 year
• After 3 months, assured permanent job.
• Must have knowledge of Three.js 
• Energetic and eager to tackle new projects and ideas

. 3.5+ years of work experience on React.JS framework

· Has expertise in following front- end optimization techniques:

· Lazy Loading

· Asynchronous Module Definition

· Image Compression and Minification

· Other front-end tooling using Grunt / Webpack and NPM

· Familiarity with NodeJS, Jasmine / Karma and other unit testing frameworks

· Foundation data structure – Arrays, dictionaries, sets and lists

· Proficient in evaluating front end performance and measure accordingly

· Strong appetite to learn industry trends and new & emerging technologies

• We use cutting edge technologies to build our products which means you get to be updated on the latest tech stack.
• You don’t need to have experience in any of our specific technologies;we are good at teaching our Engineers. Our diverse group of Engineers are a great team to work with and to learn.

• We deploy changes to production multiple times a day.
• Blameless culture and a continuous learning mindset

• Making a global platform with the scale of millions of users.
• Working directly with designers and PMs to make a world class test taking experience.
• Building a platform for companies and writing an ML based algorithm to match candidates and companies.
• Building an Ed-Tech product for the upskilling of candidates.

• Strong understanding of JS fundamentals and going deep into it coupled with experience in modern frameworks like ReactJs, Vuejs etc.
• The ideal person has worked with product teams in startups and taken features (or entire product modules) to production deployment which was then consumed by real users.
• Proficiency in building a highly scalable frontend.
• Ownership mindset- Taking end to end ownership of frontend initiatives and being part of the core team in driving the overall growth of the organisation in achieving its vision.

•  Lead the design and implementation of our new web-based user interface for our partner management service
  •    Work effectively with product management, UX designers and backend engineers
  •    Commit to deliver high quality, robust, and accessible user interface
  •    Follow software development best practices including writing unit tests and perform code reviews
  •    Build reusable components and libraries and optimize for maximum performance
  •    Provide production deployment support and troubleshooting

What you need to be ready: 

•  Minimum 3+ years of experience in UI Development
•  Thorough understanding of React.js and its core principles with minimum 2 years of experience
•  Prior experience in building customer facing web Application
  •    In-depth knowledge of HTML, Typescript/JavaScript, CSS/Sass, and related frameworks and libraries
  •    Thorough understanding of React.js and its core principles with minimum 2 years of experience
  •    Experience in Single Page Application architecture
  •    Proficient in writing tests using Jest, Mocha or any similar framework
  •    Strong computer science fundamentals in design, data structures, and problem solving
  •    Excellent troubleshooting skills