Full Stack Developer

OpenFX; Bengaluru; On-site; INR 3,000,000 - 6,000,000; Full time

Job summary

OpenFX in Bengaluru seeks an experienced frontend engineer with 5–7 years building production web apps, primarily on the frontend, and with a trading background. You will design and implement client‑facing systems for live trade or order paths using TypeScript, React, and Redux, emphasizing robust frontend architecture, data fetching, error handling, and performance.

You will also own backend touchpoints (CRUD REST APIs, PostgreSQL) and work with Next.js and Hono.

Qualifications

• 5–7 years building production web apps with frontend focus.
• Trading industry experience at a trading company/exchange/broker.
• Deep expertise in TypeScript, React, and Redux or similar state management.
• SSR and code-splitting experience; know when each is worth the cost.
• Frontend architecture, data fetching, error handling, and data synchronization between client and server.
• Experience building reliable UIs on top of asynchronous systems with partial failures.
• Experience writing automated frontend tests and using frontend test frameworks.
• Backend familiarity: CRUD REST APIs, PostgreSQL, Next.js & Hono; own backend of feature.
• Strong OO principles and low-level design patterns.
• Ability to turn vague mandates into scoped deliverables; high agency.
• Heavy AI usage to increase productivity; data-driven and async communication.

Skills

TypeScript

React

Redux

Frontend architecture

SSR

Code splitting

Trading domain experience

Automated frontend testing

AI-assisted coding

Data synchronization

Performance tuning

REST APIs

PostgreSQL

Next.js

Hono

Tools

Next.js

Hono

REST APIs

PostgreSQL

Job description

Requirements

• 5-7 years of experience building production web applications, with the majority of that depth on the frontend.
• A trading background: you've worked at a trading company, exchange, or brokerage and have built client-facing systems on a live trade or order path (e. g., CoinDCX, Groww, CoinSwitch Kuber, or similar).
• Deep expertise in TypeScript and React, and strong command of Redux or equivalent state management on non-trivial applications.
• Hands-on experience with server-side rendering and code splitting, and a clear sense of when each is worth the cost.
• Strong grasp of frontend architecture, component design, data fetching, error handling, and data synchronization between client and server.
• Experience building reliable UIs on top of asynchronous systems, where ordering isn't guaranteed, and failures are partial.
• Experience writing automated tests for the frontend and working with frontend test frameworks.
• Track record on frontend performance: you've diagnosed and fixed a slow production surface.
• Working backend proficiency: building CRUD and REST APIs, designing schemas and queries on PostgreSQL, and comfort in Next.js and Hono (or similar) server runtime. You should be able to own the backend of your own feature.
• Solid command of object-oriented programming principles and low-level design patterns.
• Comfort with abstract, ambiguous problems: you can turn a vague mandate into scoped, sequenced deliverables without waiting for someone to specify it for you.
• Hands‑on and high agency. You find the important problem and go solve it rather than waiting to be assigned it.
• Heavy AI user. You use AI coding tools with real technique and get materially more done because of it.
• Data‑driven and a clear written communicator; we are async‑heavy and globally distributed.

What helps you stand out

• Experience building real‑time financial surfaces with live pricing, order books, or streaming quote updates.
• Experience with complex financial dashboards, reconciliation views, or transaction history at scale.
• Experience with FX, multi‑currency systems, or cross‑border payments.
• Experience with frontend testing, observability, and monitoring tooling.
• Experience building a design system or shared component library that other engineers actually used.