Senior Software Engineer - Fullstack

Title: Senior Software Engineer (Fullstack) Location: Mumbai, India Are you excited by the idea of helping scale a fast-growing tech business across London, Mumbai and Austin? Do you want to contribute towards building cutting-edge automation systems that power real-time analytics and GenAI tools? If so, we’d love to hear from you! About Blenheim Chalcot  Blenheim Chalcot India is part of Blenheim Chalcot, a global venture builder headquartered in London. With over 26 years of innovation, we've been at the forefront of creating some of the most groundbreaking GenAI-enabled companies. Our ventures lead the charge in digital disruption across a spectrum of industries, from FinTech to EdTech, GovTech to Media, and beyond. Our global presence spans the US, Europe, and Southeast Asia, with a portfolio that employs over 3,000 individuals, manages assets exceeding £1.8 billion, and boasts total portfolio sales of over £500 million.  About Fospha: Fospha is dedicated to building the world's most powerful measurement solution for online retail. For over a decade, we've helped teams make smarter decisions with full-funnel marketing insights, forecasting, and optimisation. With Fospha, every team moves faster and grows smarter. Trusted by over 200 leading brands across three continents, including Huel, Oh Polly, and Represent, Fospha manages $2.5 billion in annual ad spend. Founded and backed by Blenheim Chalcot, Fospha combines startup agility with the scale, expertise, and support of one of the world’s leading venture builders. Ready to make your mark? Let’s go! 🚀 The Role  As a Senior Software Engineer, you'll build the products our customers rely on every day to make multi-million dollar media decisions. You'll work across the full stack - from crafting responsive, intuitive frontend experiences through to designing and scaling the backend microservices that power them - and, given the seniority of this role, you'll also help shape system design and infrastructure decisions as we scale.You'll work alongside engineers, product managers, and AI agents as part of our AI-first operating model, where lean, high-autonomy teams ship fast and learn faster. This is a hands-on engineering role for someone who's comfortable owning a feature end-to-end - from initial design through to production - and who wants to grow their craft in a fast-moving, ambitious environment. Where you'll focus• Frontend development using modern JavaScript frameworks (React.js or Next.js)• Backend development using Python-based microservices• System design and infrastructure, contributing to architectural decisions as we scale• End-to-end feature ownership across the stack• (Nice-to-have) Exposure to Data Science / Data Engineering workflows Key Responsibilities• Design, build, and maintain full stack features - from frontend UI/UX through to backend services and APIs in Python.• Contribute to system design and infrastructure dec...