Senior Full Stack Engineer (.NET / C#)

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 new chapter for us. We’re building the team with people who are eager to shape something from the ground up — combining the agility and entrepreneurial energy of a startup with the backing and reach of a global brand. We are hiring a Senior Full Stack Engineer (.NET / C#) to join the Sia Partners Mumbai Tech Hub. This role is a hands-on, individual contributor position with strong ownership across backend and frontend development. The engineer will primarily focus on backend development using .NET Core / C#. while also owning key frontend components built using Angular (12+). This role is client-facing, supporting delivery teams by translating business requirements into robust technical solutions, reducing dependency on the Tech Lead, and independently owning full-stack features where required. Key Responsibilities Back-End Development: Design, develop, and optimize APIs and application services using .NET Core / .NET 6+, following clean architecture and SOLID principles. Front-End Development: Develop and maintain modern, scalable user interfaces using Angular 12+, ensuring performance, usability, and maintainable UI structure. Full-Stack Ownership: Own and deliver features end-to-end