Frontend Developer

About the Role

We are looking for a Senior Web Engineer to architect and build the entire web experience using Next.js and

React — a consumer-facing trading app with real-time data, SEO-optimised public pages, and internal admin

tooling. What We’re Looking For

You have built production web applications from zero to launch using Next.js. You are comfortable across the

full web stack — SSR/SSG, real-time WebSocket handling, responsive design, and performance optimization.

Ideally, you have worked on trading platforms, dashboards, or data-rich fintech products. You take ownership of

your codebase, care about developer experience, and can work independently to deliver high-quality, production-ready code. What You’ll Do

• Architect and build the Next.js web platform from scratch — project structure, CI/CD, component library, and design system. • Build real-time, data-intensive interfaces — live price rendering, interactive charting, and responsive

dashboards. • Build SEO-optimised content pages and public-facing discovery surfaces. • Build internal admin and operations tooling — dashboards, data tables, configuration interfaces, and

monitoring views. • Define frontend engineering standards — component architecture, testing strategy, accessibility, and

performance budgets. • Own cross-browser compatibility, Core Web Vitals, and responsive design across devices. • Drive code reviews, mentor team members, and champion best practices across the web team. Must-Have

• 4+ years frontend engineering with React in production; 2+ years with Next.js specifically. • Strong TypeScript skills and experience with SSR, SSG, and incremental static regeneration. • Experience building real-time features with WebSockets in web applications. • Experience with Tailwind CSS or utility-first CSS frameworks. • Experience building both consumer-facing and internal admin/dashboard UIs. • Understanding of SEO best practices — structured data, meta tags, Core Web Vitals.

• Familiarity with CI/CD, CDN deployment, and web performance optimization. Nice-to-Have

• Prior experience building trading platforms, brokerage dashboards, or fintech web apps. • Experience with charting library embeds (TradingView, Lightweight Charts, Highcharts). • Experience building complex admin portals with advanced table views, filters, and real-time updates. • Familiarity with search integration (Typesense, Algolia). • Experience with accessibility standards (WCAG 2.1) and internationalization (i18n). Tech Stack

Framework Next.js 14+, React 18+

Language TypeScript

Styling Tailwind CSS, Headless UI / Radix

Real-time WebSocket, SWR / React Query

Charting Charting library embed, Recharts / D3

Admin TanStack Table, React Hook Form

Deployment Vercel / AWS CloudFront, CDN, Edge functions

Testing Jest, Playwright (E2E), Lighthouse CI

Exp: 3 - 6yrs
Notice period : Immediate - Max 60 days
Job Location : Gurgaon

Experience with client side Web technologies/frameworks such as Angular.js 1.x, React.js, Backbone, KnockoutJS, Bootstrap Experience with AngularJS 2+ is a strong plus.

Strong understanding of Web markup with HTML(5) and CSS(3) is a strong plus.

Ability to write high-performance, reusable code for UI components Build and support scalable, re-usable software Ability to work independently and within a team environment

Good written and verbal communication skills Solid understanding of cross-browser/platform consistency and compatibility Experience with frameworks such as jQuery Mobile, ReactNative, Appcelerator, Mootools, Kendo UI, Sencha Touch and ActionScript is a plus

Experience with Node.js, Bower, Yeoman, Gulp etc. is a plus Basic understanding of server-side CSS pre-processing platforms, such as LESS and SASS is a plus Proficient understanding of code versioning tools, such as SVN and Git is mandatory.

• Relevant experience in React JS  5+ Year

• Experience in Hooks, Typescript

• Experience in GraphQL (Query & Mutations)
• Strong experience in Jest for Unit Testing
• Knowledge on docker, K8 and Kafka

• Use markup languages like HTML to create user-friendly web pages
• Maintain and improve website
• Optimize applications for maximum speed
• Design mobile-based features
• Collaborate with back-end developers and web designers to improve usability
• Get feedback from, and build solutions for, users and customers
• Write functional requirement documents and guides
• Create quality mockups and prototypes
• Help back-end developers with coding and troubleshooting
• Ensure high quality graphic standards and brand consistency
• Stay up-to-date on emerging technologies

• Proven work experience as a Front-end developer
• Hands on experience with markup languages
• Experience with JavaScript, CSS and jQuery
• Familiarity with browser testing and debugging
• In-depth understanding of the entire web development process (design, development and deployment)
• Understanding of layout aesthetics
• Knowledge of SEO principles
• Familiarity with software like Adobe Suite, Photoshop and content management systems
• An ability to perform well in a fast-paced environment
• Excellent analytical and multitasking skills
• BSc degree in Computer Science or relevant field

FrontEnd Developer

Job Description

Introduction-:

Synapsica is a growth stage HealthTech startup founded by alumni from IIT Kharagpur, AIIMS New Delhi, and IIM Ahmedabad. We believe healthcare needs to be transparent and objective, while being affordable. Every patient has the right to know exactly what is happening in their bodies and they don’t have to rely on cryptic 2 liners given to them as diagnosis. Towards this aim, we are building an artificial intelligence enabled cloud based platform to analyse medical images and create v2.0 of advanced radiology reporting. We are backed by YCombinator and other investors from India, US and Japan. We are proud to have GE, AIIMS, the Spinal Kinetics as our partners.

Your Roles and Responsibilities

Who can apply:

We are looking for a passionate, self-starting, competent professional who is comfortable with all aspects of software development in FrontEnd. You will get hands-on experience in the latest technology and skills such as ReactJS, VueJS, VanillaJS etc. This role is ideal for you if you have a background in Front End development and are looking for ­­­­­the next level of career growth and competence in interface design and development.

What will you do:     
                  ­­­­

• Responsible for  developing, testing and maintaining the  front-end of the product interface.
  
  
• Interacting with APIs and middlewares through Front-end action items.
  
  
• Ensuring responsiveness and cross-platform compatibility of applications.
  
  
• Owning and delivering end-to-end products, features, enhancements
  .
• Write clean, well-documented and functional code with unit test cases.

Required Skills and Technologies

• Degree in Computer Science or related discipline with 3-7 years of experience.
• Proficiency with VanillaJS, html and css, and fundamental front-end libraries and frameworks such as ReactJS, AngularJS, Vue.JS, .
• Hands on with React.JS or similar frontend framework/library.
• Well versed with UI and UX.
• Good to have knowledge of CI/CD tools.
• Hands on with investigating and fixing technical bottlenecks and performance assessment and improvement.
• Familiarity with agile methodologies.
• Prior experience with at least one no-sql database such as MongoDB.
• Excellent verbal communication skills.
• Good problem solving and troubleshooting skills.
• High sense of ownership along with deep interest and passion for technology.

JD:
Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model

Thorough understanding of React.js and its core principles

Experience with popular React.js workflows (such as Flux or Redux)

Familiarity with newer specifications of EcmaScript

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

Familiarity with code versioning tools such as Git

•    Angular developer (3 - 5 years of experience)

•      Should have expert level knowledge to Design, Develop and test Web Apps with Angular versions 6 and above.

•      Primary Skills – Angular6+, HTML, CSS3, JavaScript.

•      Node JS as backend will be advantage

•      Knowledge of Mongo, MySql will be advantage

•      Highly skilled at front-end engineering using Object-Oriented JavaScript, TypeScript, various JavaScript,TypeScript patterns and frameworks.

•      Should have experience in publishing and consuming Services using REST API

•      Excellent time-management, multi-tasking, and communication skills. Capable of handling multiple projects and related complexities at the same time.

•      Compensation - As per industry standards.

•      Joining – at earliest.