Senior Full Stack Engineer (Frontend)

sia· Data Science
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📍 MH📍 Mumbai📍 Mumbai, MH, India📍 inFull time

About this role

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 looking for a skilled Senior Software Engineer to play a key role in our front-end development using ReactJS. This role involves enhancing user interface components and implementing well-conceived designs into our AI-powered SaaS solutions. You will collaborate with backend teams and designers to ensure seamless application performance and a high-quality user experience. 

Key Responsibilities 

  • Front-End Development: Develop and optimize sophisticated user interfaces using ReactJS. Ensure technical feasibility of UI/UX designs. 

  • Performance Optimization: Enhance application performance on the client side by implementing state management solutions and optimizing component rendering. 

  • Cross-Browser Compatibility: Ensure that applications perform consistently across different browsers and platforms. 

  • Collaboration: Work closely with backend developers and web designers to meet technical and consumer needs. 

  • Code Integrity: Maintain and improve code quality through writing unit tests, automation, and performing code reviews. 

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

  • Cloud Deployment & CI Management: Work with GCP / AWS / Azure for deploying and managing applications in the cloud. Oversee continuous software integration processes including tests writing and artifacts building. 

Qualifications

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

  • Experience: 3-6 years of experience in frontend development, with significant expertise in ReactJS. 

Skills:  

  • Expertise in ReactJS, NextJS, and Node.js. 

  • Experience with REST and GraphQL APIs. 

  • Proficient in JavaScript, TypeScript, and HTML/CSS. 

  • Familiar with Git, CI/CD, and Figma. 

  • Strong knowledge of micro-frontends, accessibility standards, and APM tools. 

  • Familiar with newer specifications of ECMAScript. 

  • Knowledge of isomorphic React is a plus. 

  • Infrastructure as Code (IaC) skills with Terraform and Helm for efficient cloud infrastructure management. 

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

  • Ability to understand business requirements and translate them into technical requirements. 

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. 

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Frequently Asked Questions

Is the salary disclosed for the Senior Full Stack Engineer (Frontend) position at sia?
The salary for this Senior Full Stack Engineer (Frontend) role at sia is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Senior Full Stack Engineer (Frontend) position at sia located?
This Senior Full Stack Engineer (Frontend) role at sia is based in MH, Mumbai, Mumbai, MH, India, in. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Senior Full Stack Engineer (Frontend) role at sia full-time or part-time?
This is listed as a Full time position. It is posted as a Senior Full Stack Engineer (Frontend) role in the Data Science department at sia.
Which team or department does the Senior Full Stack Engineer (Frontend) at sia belong to?
This Senior Full Stack Engineer (Frontend) position is part of the Data Science department at sia. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Senior Full Stack Engineer (Frontend) position at sia?
Click the "Apply Now" button on this page. You will be redirected to sia's official application portal hosted on smartrecruiters where you can submit your application directly.
When was the Senior Full Stack Engineer (Frontend) job at sia posted?
This Senior Full Stack Engineer (Frontend) position at sia was posted on Mar 16, 2026. Apply as soon as possible — early applications are often reviewed first.
Senior Full Stack Engineer (Frontend)
sia
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