Sr Software Engineer (Full Stack - Contract) at Sainsburys, UK

Expertise in NestJS, TypeScript, Java, React/NextJS, and AWS, with strong focus on resilient, secure, and well-tested backend services as well as UI apps. Hands-on experience with REST, GraphQL, event-driven messaging (Kafka, pub/sub), ensuring robust inter-service communication. Used testing libraries for TDD (Jest, Cucumber, Junit) and AWS CodePipeline for CI/CD. Developed applications that process 2+ million transactions per day and enabled communication between robust, high-performance microservices. Deployed microservices to AWS ECS as well as Lambda. Used MySQL, PostgreSQL and DynamoDB for data storage and Redis for cache. Refactored legacy code to improve readability and maintainability and transformed to cloud-based microservices. Developed automated unit tests along with integration tests to ensure code quality and reduce production bugs.