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Senior Java Developer

Randstad Hungary KftHungary

5 days ago

Job description

Backend Development : You'll implement and optimize Spring Boot services, specifically using WebFlux and R2DBC / JDBC, to handle high volumes of data (thousands of messages per minute).

Database Management : You will be responsible for designing database schemas and writing efficient SQL for Postgres, as well as working with batch loaders.

API Development : You'll develop REST and GraphQL endpoints and contribute to gRPC / Protobuf contracts.

Testing and Optimization : A key part of the role is writing comprehensive unit and integration tests using JUnit 5 and Testcontainers, as well as profiling and tuning performance.

Our client is an innovative cybersecurity company working on products for the telecommunication and IoT industries. They are currently building a new software development team in Budapest and are looking for a skilled Senior Java Developer to join their team.

Experience : You should have at least 5 years of professional Java experience, with a minimum of 3 years using Spring Boot.
Technical Skills : Asynchronous / reactive programming experience (WebFlux, Reactor, or RxJava) is a must-have, along with familiarity with messaging / streaming technologies like Kafka or MQTT.
Database & DevOps : Strong SQL and schema design skills are required, as is a basic understanding of Docker / Kubernetes and CI / CD pipelines.
Strong knowledge of written and spoken English.
Flexible hybrid work, core hours 10 : 00–16 : 00
Choice of personal laptop
Small, senior team : low bureaucracy, high impact

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Senior Java Developer • Hungary