Develop and maintain scalable Java full-stack applications, backend services, microservices, REST and GraphQL APIs, PostgreSQL databases, and GCP deployments. Build data pipelines with BigQuery, Dataflow, or Dataproc; integrate generative AI capabilities; implement CI/CD, Docker, Kubernetes, Terraform, authentication, and security practices. Collaborate in Agile teams, participate in code reviews and troubleshooting, and mentor junior engineers.