Senior Full Stack Engineer (React + Python)

About the role

Sia is a next-generation, global management consulting group. Founded in 1999, we were born digital. Today our strategy and management capabilities are augmented by data science, enhanced by creativity and driven by responsibility. We’re optimists for change and we help clients initiate, navigate and benefit from transformation. We believe optimism is a force multiplier, helping clients to mitigate downside and maximize opportunity.

With expertise across a broad range of sectors and services, our 3,000 consultants serve clients worldwide from 48 locations in 19 countries. Our expertise delivers results. Our optimism transforms outcomes.

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 looking for a skilled Senior Full Stack Engineer (React + Python) for our Mumbai location. This role involves developing scalable, high-performing web applications for our AI-powered SaaS solutions. You will work across frontend and backend systems, building intuitive user interfaces using React and robust backend services using Python, while collaborating closely with product, design, DevOps, and engineering teams.

Key Responsibilities

Frontend Development: Develop and optimize responsive, user-friendly interfaces using ReactJS, TypeScript, JavaScript, HTML, and CSS. Ensure the technical feasibility of UI/UX designs.

Backend Development: Design, develop, and maintain scalable backend services and APIs using Python frameworks such as FastAPI, Django, or Flask.

API Development & Integration: Build, maintain, and optimize RESTful APIs; integrate frontend applications with backend services, databases, and third-party platforms.

Database Management: Work with SQL and NoSQL databases such as PostgreSQL and MongoDB, ensuring data integrity, performance, and scalability.

Performance Optimization: Improve frontend rendering, application responsiveness, backend performance, and API reliability.

Code Integrity: Maintain and improve code quality through unit testing, integration testing, automation, documentation, and code reviews.

Containerization & Cloud Deployment: Use Docker and Kubernetes to deploy and manage containerized applications. Work with GCP, AWS, or Azure for cloud deployment and application management.

Infrastructure as Code (IaC): Utilize Terraform and Helm to manage cloud infrastructure and ensure scalable, efficient deployment environments.

CI/CD Management: Contribute to continuous integration and deployment processes, including test automation, build artifact creation, and application releases.

3–6 years of software development experience, with hands-on experience in full stack development using ReactJS and Python.

Skills

• Strong expertise in ReactJS, JavaScript, TypeScript, HTML, and CSS.

• Proficiency in Python and backend frameworks such as FastAPI, Django, or Flask.

• Experience with REST APIs; familiarity with GraphQL is a plus.

• Experience with frontend state management solutions such as Redux, Context API, React Query, or Zustand.

• Database management experience with PostgreSQL, MongoDB, or similar SQL/NoSQL databases.

• Familiarity with Docker, Kubernetes, Git, CI/CD pipelines, and microservices architecture.

• Hands-on experience deploying and managing applications using GCP, AWS, or Azure.

• Infrastructure as Code (IaC) skills with Terraform and Helm.

• Understanding of unit testing, API testing, code reviews, and secure coding practices.

• Familiarity with Figma, responsive design, accessibility standards, and cross-browser compatibility.

Education

Bachelor’s/Master’s degree in Computer Science, Software Engineering, or a related field.

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)