QA Engineer – MERN Stack (4+ yrs)

About the role

We are looking for a QA Engineer with strong hands‑on experience in the MERN stack to ensure the quality and performance of our multi‑tenant SaaS products. You will work closely with product and development teams to deliver reliable, scalable solutions that meet real user needs.

Key responsibilities

• Design, develop, and maintain RESTful APIs and complex data flows.
• Improve and refactor legacy codebases to support scaling and performance goals.
• Collaborate on version‑controlled projects using Git and follow CI/CD pipelines.
• Validate SaaS architecture components, including authentication and role‑based access systems.
• Participate in testing activities using modern testing frameworks.
• Monitor and optimise database design, performance, and scalability.

Required profile

• 4+ years of hands‑on experience with the MERN stack in a product environment.
• Strong product mindset focused on usability, performance, and user impact.
• Experience working on multi‑tenant SaaS applications.
• Familiarity with cloud platforms such as AWS or Azure.
• Proven ability to work in collaborative development workflows.

Required skills

• MERN stack
• JavaScript (ES6+)
• React
• RESTful APIs
• Database design
• Performance optimization
• Scalability engineering
• SaaS architectures
• Authentication & role‑based access
• Git
• AWS
• Azure
• Testing frameworks
• CI/CD pipelines
• Legacy codebase refactoring