Senior Java backend Engineer

Backend Developer Profile Core Tech Stack Languages & Frameworks Java 11–25 (LTS focus: 11, 17, 21), modern language features (records, sealed classes, pattern matching, virtual threads) Spring Boot 3–4 (Spring Framework 6+, native compilation awareness a plus) Quarkus 1–2 (CDI, Panache, native image builds) Data & Messaging PostgreSQL (schema design, indexing, query optimization, migrations via Liquibase/Flyway) Kafka (producers/consumers, partitioning strategy, exactly-once semantics, schema registry/Avro or Protobuf) Elasticsearch (indexing strategy, query DSL, aggregations) Redis (caching patterns, TTL strategy, pub/sub, distributed locks) APIs & Integration REST (resource design, versioning, OpenAPI/contract-first) gRPC (protobuf contracts, streaming) GraphQL (schema design, resolver performance, N+1 avoidance) Architecture Microservices (service boundaries, decoupling patterns, anti-corruption layers) Event-driven architecture (choreography vs. orchestration, eventual consistency, outbox pattern) 12-factor app principles as a baseline design discipline Platform, Containers & Delivery Azure DevOps (pipelines as code, release management, boards) Docker (writing/reading Dockerfiles, image optimization) Kubernetes (pods, services, Config

Maps/Secrets, HPA, resource limits) Helm charts and GitOps-based deployment (ArgoCD) Testing & Quality Gates J

Unit 5, Mockito, Testcontainers Contract testing (Pact), static analysis (SonarQube/Checkstyle) Chaos/res