Abhishek Kumar

Full Stack JavaScript (MERN) Developer with 4+ years of experience designing and deploying scalable cloud-native applications using MongoDB, Express.js, React.js, Node.js. Strong expertise in RESTful API development, microservices architecture, authentication and authorization (JWT, OAuth 2.0, RBAC, SSO), AWS cloud services, CI/CD pipelines. Proven track record of performance optimization, secure API design (OWASP), and delivery of production-ready applications in Agile/Scrum environments.

Digital Specialist Engineer at Infosys Ltd. (2022-04 – Present)

• Owned end-to-end design and delivery of scalable, enterprise-grade MERN applications across consumer, retail, and logistics domains, improving overall system performance by ~30% while supporting business-critical workflows
• Engineered and optimized high-throughput RESTful APIs, reducing average response time from ~800 ms to ~300 ms through caching, asynchronous processing, and backend performance tuning, ensuring consistent performance under peak traffic
• Led migration from on-premises infrastructure to AWS, architecting cloud-native solutions that improved horizontal scalability, availability, and reduced infrastructure costs by ~20%
• Architected and implemented secure authentication and authorization architectures using JWT, RBAC, AWS Cognito, and Azure AD (SSO), enabling SSO and fine-grained access control
• Improved MongoDB performance by ~40% through schema design optimization, strategic indexing, and query tuning, significantly reducing read/write latency for high-volume data operations
• Architected and standardized CI/CD pipelines using GitHub Actions and Docker, automating build, test, and deployment workflows to cut deployment time by ~50% and improve release stability
• Built scalable, asynchronous, event-driven microservices using API Gateway, caching layers, and message queues (Redis, Kafka), reducing system latency by ~40% during peak traffic and improving backend resilience
• Built and maintained unit, component, and integration test suites using Jest and React Testing Library, leveraging AI-assisted tools (GitHub Copilot, LLMs) to accelerate test generation and improve code quality

B. Tech in Electrical Engineering – Madan Mohan Malaviya University of Technology, Gorakhpur (2019)