Senior Java Backend Engineer | REST Microservices - Hybrid

thecodest; Warszawa; Hybrid; PLN 150,000 - 230,000; Full time

Job summary

The Codest in Poland is seeking a skilled Java backend developer to build and maintain Java-based services and REST APIs. You will collaborate with cross-functional teams, participate in CI/CD, automated testing, and code reviews, and contribute to reliable, secure system design.

You will work in a hybrid setup, visiting the Kraków office 6-8 days per month. Strong English, experience with Java, Spring Boot, and microservices are essential for success.

Qualifications

• Advanced English in speaking and writing.
• Strong commercial experience with Java (8+/11+/17+/21) and Spring Boot.
• Hands-on experience with REST APIs, microservices, and SQL databases (PostgreSQL, Oracle).
• Familiarity with React, MQ/Solace, Redis, and Kubernetes.
• Experience with CI/CD, Git, Maven/Gradle, and DevOps tooling.
• Knowledge of monitoring and observability tools (Grafana, Splunk, Prometheus, Jenkins, etc.).
• Understanding of application security and testing practices.
• Experience working in Agile / DevOps environments.
• Strong communication skills and ability to work across distributed teams.
• Self-driven, customer-oriented, and comfortable owning tasks end-to-end.

Responsibilities

• Develop and maintain Java backend services, REST APIs, and microservices.
• Collaborate with cross-functional teams to deliver scalable solutions.
• Support production systems, resolve incidents, and troubleshoot issues.
• Contribute to system architecture focused on performance and reliability.
• Work in Agile teams using CI/CD, automated testing, and code reviews.
• Maintain technical documentation and improve engineering practices.
• Act as a technical SME for application and support-related topics.
• Identify and manage risks, dependencies, and delivery blockers.

Skills

Java 8+/11+/17+/21

Spring Boot

REST APIs

Microservices

SQL (PostgreSQL, Oracle)

React

MQ/Solace

Redis

Kubernetes

CI/CD

Git

Maven/Gradle

DevOps tooling

Monitoring/Observability

Security & Testing

Agile/DevOps

Communication

Self-driven/Customer-oriented

Tools

Git

Maven/Gradle

CI/CD tooling

Kubernetes

Jenkins

Job description

The Codest in Poland is seeking a skilled Java backend developer to build and maintain Java-based services and REST APIs. You will collaborate with cross-functional teams, participate in CI/CD, automated testing, and code reviews, and contribute to reliable, secure system design.

You will work in a hybrid setup, visiting the Kraków office 6-8 days per month. Strong English, experience with Java, Spring Boot, and microservices are essential for success.