Contributed to the design and development of high-scale, cloud-native microservices using Python (FastAPI, Flask) with a focus on secure API standards and PCI-DSS compliance. Built and maintained RESTful and GraphQL APIs with OAuth2, JWT, and SAML authentication. Developed backend services in Kotlin with Micronaut for optimized performance in financial transactions. Integrated internal systems and external gateways via gRPC for real-time, fault-tolerant processing. Delivered full-stack features using React.js, TypeScript, and Node.js. Adopted Kafka for asynchronous, high-throughput event-driven architectures. Migrated legacy monoliths to AWS-based microservices, improving performance by 30%. Managed deployments using Docker, Kubernetes, and Jenkins, and integrated observability tools like Datadog, Splunk, and New Relic. Practiced TDD and secure coding with PyTest.

Contributed to full-cycle software development in Agile teams, from requirements gathering to deployment and support. Developed scalable REST APIs and webhook integrations using Flask/FastAPI, handling 10M+ daily requests. Built logistics modules and internal dashboards with Python, React.js, Vue.js, and SQL databases (MySQL/PostgreSQL/Redis). Implemented asynchronous processing with RabbitMQ and Celery, and improved query performance by 40%. Integrated third-party APIs (Razorpay, Delhivery), built analytics pipelines, and ensured quality through PyTest, Mocha, and Selenium. Deployed applications on AWS using Docker, Kubernetes, and GitLab CI/CD