Lead Full Stack Engineer

The Company Our client is a leading crypto F&O trading platform in India, offering futures and options trading on BTC, ETH, SOL, and other top crypto derivatives with INR settlement. Their mission is to create a secure sanctuary for everyday crypto futures traders, embodying innovation and dynamism in every aspect of our operations. At our client, they are dedicated to accelerating the widespread adoption of cryptocurrencies in India, ushering in a new era of financial possibilities. What sets them apart is their unwavering commitment to being a catalyst for change in the crypto landscape. They are architects of a future where financial markets seamlessly integrate with the world of digital assets. Job Summary Our client is seeking an experienced Lead Full Stack Engineer to build and scale critical systems across backend services and user-facing applications on their trading platform. This role is ideal for a strong individual contributor who enjoys solving complex engineering problems in environments where latency, correctness, reliability, and user experience are essential. The Lead Full Stack Engineer will contribute hands-on across core backend systems and frontend applications, working on components such as trading workflows, user lifecycle, risk and margin flows, financial data surfaces, and real-time interfaces. The ideal candidate will combine strong backend depth with frontend ownership and will be comfortable driving technical execution, code quality, and architectural decisions as an individual contributor. Roles and Responsibilities Build and enhance backend services powering the trading platform, including user lifecycle, trade processing, and core financial workflows. Develop and maintain frontend applications and interfaces used by traders for order placement, positions tracking, portfolio monitoring, and related workflows. Contribute to the design and implementation of systems related to margin workflows, risk checks, balances, P&L calculations, and financial data accuracy. Build scalable and performant APIs and services using Node.js or Golang, with strong attention to latency, concurrency, and system reliability. Build responsive, intuitive, and high-performance user interfaces using React.js or equivalent frontend frameworks. Work on real-time systems and interfaces, including APIs and WebSocket-based data flows used by retail traders, algorithmic traders, and institutional clients. Make sound technical decisions for performance-critical and correctness-sensitive systems in collaboration with senior engineering stakeholders. Review code and designs to identify scalability bottlenecks, concurrency issues, edge cases, and potential failure modes. Participate actively in debugging production issues, incident response, root cause analysis, and follow-through fixes. Collaborate closely with Product, Design, QA, Risk, and backend/frontend peers to deliver reliable and high-impact product features. Drive engineering best practices around code quality, testing, observability, and maintainability through hands-on contribution and technical leadership. Take end-to-end ownership of modules and features, from design and development to deployment and production support. Experience and Qualifications Bachelor's degree in Computer Science, Engineering, or a related field. 5–8 years of experience building production-grade software systems as a backend or full stack engineer. Strong hands-on experience with backend technologies such as Node.js or Golang. Strong hands-on experience with React.js or equivalent modern frontend frameworks. Experience building and shipping systems where performance, reliability, data integrity, and user experience are critical. Solid understanding of concurrency, asynchronous programming, API design, and distributed systems fundamentals. Experience building frontend applications with complex state management, data-heavy interfaces, and real-time updates. Ability to independently own and deliver features in a fast-paced environment while collaborating with cross-functional teams. Strong problem-solving, debugging, system design, and communication skills. Preferred Skills Experience building trading systems, fintech products, or exchange infrastructure. Experience working on real-time dashboards, transaction-heavy systems, or high-throughput platforms. Familiarity with WebSockets, event-driven systems, caching layers, and performance optimization. Experience with cloud-native deployment environments, observability tooling, and production troubleshooting. Ability to act as a technical anchor for modules and guide engineering decisions without people-management responsibility.