Senior Backend Engineer

Jappware

Що робити

Build maintainable backend services and APIs using modern Java, Spring Boot, and appropriate Spring modules, following the platform’s defined architecture and standards.
Read and understand existing code across services to grasp feature sets, data flows, and integration points, and build on them effectively.
Develop reactive, non-blocking services with Spring WebFlux and Project Reactor, with practical judgment about when reactive programming is — and is not — the right choice.
Build event-driven integrations using Kafka and/or RabbitMQ, applying sound practices for message delivery, idempotency, retries, ordering, and dead-letter handling.
Model and access data in relational databases (PostgreSQL/MySQL) and NoSQL databases, apply caching effectively with Redis, and use Elasticsearch/OpenSearch for indexing and search workloads.

Strong Java development skills: object-oriented design, collections, concurrency, asynchronous processing, and JVM fundamentals.
Production experience with Spring Boot; practical knowledge of Spring WebFlux/Project Reactor and reactive programming principles.
Demonstrated ability to ramp up quickly on unfamiliar codebases: tracing code paths, understanding existing features and conventions, and making changes that fit the established design.
Strong API engineering skills: REST/HTTP semantics, API contracts, validation, error handling, pagination, versioning, and OpenAPI documentation.
Distributed-systems fundamentals: timeouts, retries, circuit breakers, rate limiting, idempotency, caching, and graceful degradation.

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