Java job support online

What we help with

• Spring Boot & Spring Cloud — auto-configuration, profiles, actuator, config server, service discovery, resilience (Resilience4j), Spring Security and OAuth2.
• Microservices — service boundaries, inter-service communication, API gateways, distributed tracing, saga and outbox patterns.
• Messaging — Kafka and RabbitMQ: consumers, partitioning, offsets, idempotency, dead-letter handling.
• Persistence — Hibernate/JPA mappings, the N+1 problem, fetch strategies, transactions, Flyway/Liquibase migrations, query tuning.
• Concurrency — executors, CompletableFuture, thread-safety, virtual threads, debugging deadlocks and race conditions.
• Testing — JUnit 5, Mockito, Testcontainers, integration tests, contract tests, raising coverage on legacy code.
• Performance — reading heap dumps and thread dumps, GC tuning, profiling with JFR/async-profiler, fixing slow endpoints.
• Build & CI — Maven and Gradle multi-module setups, dependency conflicts, Docker images, failing pipelines.

Typical situations

• You have joined a large Spring microservices codebase and need to make changes safely without understanding all of it yet.
• A production endpoint is slow or the service is running out of memory and you need to find the cause.
• You are comfortable with core Java but new to Spring, Kafka or Kubernetes-deployed services.
• A sprint task involves a pattern you have not implemented before and you want to talk through the design first.

How Java job support works

You book a free consultation and tell us your version (Java 8, 11, 17, 21), your frameworks and the task in front of you. We match you with a senior Java engineer in your timezone. In sessions we screen-share, walk through the code and the stack traces, and get you to a working, understood solution — then review your PR before it goes up. See the full process and plans.

Related tracks

Working across the stack? We also cover DevOps (deploying and running your Java services), AWS and JavaScript & front-end. For interviews, see interview preparation.