Built and optimized RESTful APIs and microservices using ASP.NET Core (.NET 6+), Spring Boot, and Express.js, applying DDD principles for scalable architectures.
Integrated SQL Server, PostgreSQL, and MongoDB, implementing Redis caching, query optimization, and async data processing for high-performance operations.
Applied OAuth2/JWT authentication, RBAC, and API gateways with Spring Cloud Gateway and reverse proxy routing for secure, distributed systems.
Automated CI/CD pipelines using GitLab CI, GitHub Actions, and Jenkins, deploying containerized services via Docker, Kubernetes, Terraform, and Helm.
Deployed across AWS (ECS/EKS, Lambda) and Azure (App Service, Functions) with multi-cloud scalability and reproducible IaC environments.
Enhanced Angular frontends with lazy loading, OnPush detection, RxJS/NgRx, and AOT compilation for improved performance and responsiveness.
Strengthened security, monitoring, and observability with Vault, AWS KMS, Azure Key Vault, Prometheus, Grafana, and the ELK stack.