Staff Software Engineer (Node.js & TypeScript)

Sia Partners is a next-generation global management consulting firm, founded in 1999 and headquartered in Paris, France. The firm is recognised for its innovative approach, combining strategy and management consulting with data science and creativity. Sia Partners serves a diverse range of sectors, including energy, banking, healthcare, and technology, providing services to over 1,000 clients worldwide, including many Fortune 500 companies. With a strong emphasis on delivering tangible results and superior value, Sia Partners is committed to helping clients navigate the digital revolution and achieve transformation. The firm operates with a global presence, employing over 3,500 consultants across 48 locations in 20 countries Our Mumbai office was launched in 2024, marking an exciting phase for us. We’re building the team here with people who are excited about the opportunity to shape something from the ground up — having the best of 2 worlds- the agility and entrepreneurial energy of a startup with the backing and reach of a global brand. We are seeking a Staff Software Engineer to provide technical leadership in the design, development, and scaling of our core SaaS platforms and backend systems. This role combines hands-on engineering expertise in the Node.js ecosystem with architectural ownership and client-facing consulting responsibilities. You will drive the technical strategy for our backend services, ensuring high performance, type safety, and scalability while mentoring a growing team of engineers. Key Responsibilities Technical Architecture & Development Architect Scalable Systems: Lead the design and implementation of distributed backend systems using TypeScript and Node.js (NestJS/Express/Fastify) that can handle high throughput and complex data processing. System Integration: Design robust APIs (REST and GraphQL) and event-driven architectures (Kafka/RabbitMQ) to integrate our SaaS products with AI models, external data sources, and third-party services.