Senior Full Stack Engineer (.NET / C#)

Location: Mumbai, MH, in

Company Description

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.

Job Description

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 when work spans both backend and frontend layers, coordinating with the Tech Lead for alignment where needed. 

• Client-Facing Delivery: Engage in technical discussions with clients, understand functional requirements, articulate solution approaches, and explain technical trade-offs clearly. 

• Cloud Deployment: Build and deploy applications on cloud platforms (Azure / AWS / GCP) using containerized workloads. 

• Containerization: Work with Docker and Kubernetes as part of application deployment and runtime environments, in collaboration with DevOps teams. 

• CI/CD Practices: Work with existing CI/CD pipelines (GitLab CI / Azure DevOps) to ensure stable builds, testing, and deployments. 

• Code Quality & Reviews: Maintain high engineering standards through code reviews, unit testing, documentation, and adherence to best practices. 

• System Design Contribution: Contribute to application-level design discussions related to scalability, performance, and maintainability. 

Qualifications

• Education: Bachelor’s/master's degree in computer science, Software Engineering, or a related field. 

• Experience: 4-6 years of experience with strong hands-on exposure to both backend and frontend development. 
  
  Skills: 

• Strong proficiency in C# and .NET Core / .NET 6+ 

• Experience building RESTful APIs and backend services 

• AI-Native Engineering: Experience utilize Cursor, GitHub Copilot, or Claude Code as a core part of their daily workflow. 

• Hands-on experience with Angular 12+, TypeScript, HTML, and CSS 

• Experience with relational databases (SQL Server / PostgreSQL) and NoSQL databases (MongoDB) 

• Familiarity with Docker and Kubernetes 

• Experience working with CI/CD pipelines 

Additional Information

What We Offer: 

• Opportunity to lead cutting-edge AI projects in a global consulting environment. 

• Leadership development programs and training sessions at our global centers. 

• A dynamic and collaborative team environment with diverse projects. 

Position based in Mumbai (onsite)

Sia is an equal opportunity employer. All aspects of employment, including hiring, promotion, remuneration, or discipline, are based solely on performance, competence, conduct, or business needs.