Back End Developer

K&K Talents is an international recruiting agency that has been providing technical resources in the European region since 1993. This position is with one of our clients in Poland who is actively hiring candidates to expand their teams.

Role: Java Backend Developer

Location: Cracow, Poland (Hybrid)

Employment type: Permanent Fulltime

Requirements:

• Minimum 5 years of commercial experience developing web applications using the Java/Spring stack- obligatory requirement
• Proven team lead experience, including requirements handling, decomposing user stories, and managing middle/junior engineers.
• Strong understanding of scrum team roles and agile development methodology.
• Extensive DevOps experience, including creating and improving CI/CD pipelines in cloud environments, networking, Unix, and understanding Kubernetes and Docker registries.
• Expertise in distributed systems design and software architecture.
• Proficiency in refactoring, performance, and memory tuning.
• Experience with build systems (Maven or Gradle): dependency management, build lifecycle, release, and version management.
• Knowledge of Git branching models (git flow, GitHub flow).
• Excellent knowledge of Spring Framework and related technologies (ORM, messaging, security, batch, integration).
• Strong understanding of databases, including consistency models, SQL, and distributed transactions.
• Familiarity with microservice architecture patterns and best practices, communication patterns (HTTP, messaging, gRPC, CQRS).
• Proficiency in API design best practices, including API First approach.
• Strong algorithms and problem-solving skills.
• Proficiency in CI/CD tools and best practices, including Jenkins, SonarQube, unit testing, and git flow.
• Expertise in asynchronous programming and reactive programming.
• Familiarity with technologies such as Kafka and MQ.
• Knowledge of relational databases as well as NoSQL, understanding differences and applications.
• Understanding of Kubernetes/Docker Swarm-based architecture and deployment.
• Experience with JIRA and Confluence.
• Experience using GenAI tools such as Cline, Aider, or Github Copilot.
• Knowledge of Vert.X is a plus.

Note: Applicants for employment in Poland should possess work authorization which does not require sponsorship by the employer for a visa.