Senior Back-End Java Developer

Position: Senior Back-End Java Developer

Location: Kraków, Wrocław, Warsaw

Work Setup: Hybrid (2–3 days per week in office – mandatory)

Employment Type: Full-time/ Umowa o Pracę

Compensation: Competitive base salary + financial bonus

Please note: Only candidates who are already eligible to live and work in Poland can be considered for this role. Relocation to Poland is required if applying from abroad.

Key Responsibilities

• Lead the design and development of complex web applications using the Java/Spring ecosystem.
• Break down requirements, manage user stories, and mentor mid-level and junior engineers.
• Drive agile practices, fully embracing scrum roles and methodologies.
• Architect and implement distributed systems and robust software solutions.
• Refactor and optimize code with a focus on performance and memory efficiency.
• Manage build systems (Maven/Gradle) for dependencies, lifecycle, releases, and versioning.
• Apply Git branching strategies (git flow, GitHub flow).
• Work with Spring modules (ORM, messaging, security, batch, integration).
• Design and maintain databases, including SQL and distributed transactions.
• Implement microservice architecture patterns with communication approaches such as HTTP, messaging, gRPC, and CQRS.
• Design APIs following best practices with an API-First mindset.
• Tackle complex algorithms and deliver efficient solutions.

Requirements

• 5+ years of hands-on experience developing web applications with Java & Spring (mandatory).
• Proven experience in team leadership, requirements handling, and mentoring engineers.
• Solid understanding of Agile/Scrum methodologies.
• Strong DevOps expertise: CI/CD pipelines, cloud environments, networking, Unix, Kubernetes, Docker registries.
• Deep knowledge of distributed systems design and architecture.
• Skilled in refactoring, performance tuning, and memory optimization.
• Practical experience with Maven or Gradle.
• Proficiency in Git workflows.
• Advanced knowledge of Spring Framework and related technologies.
• Strong understanding of databases: consistency models, SQL, NoSQL, distributed transactions.
• Experience with microservices, including communication patterns (HTTP, messaging, gRPC, CQRS).
• Expertise in API design with API-First principles.
• Strong problem-solving and algorithmic skills.
• Proficiency in CI/CD tools: Jenkins, SonarQube, unit testing, Git flow.
• Experience with asynchronous and reactive programming.
• Familiarity with Kafka, MQ, and other messaging systems.
• Hands-on experience with Kubernetes/Docker Swarm deployments.
• Knowledge of JIRA and Confluence.
• Experience with GenAI tools (e.g., Cline, Aider, GitHub Copilot).
• Knowledge of Vert.X is a plus.

What We Offer

• Private medical care.
• Multisport card and access to the MyBenefit platform.
• A career within a multinational company with global opportunities.
• and many more

Please apply here or email Paulina Laurie at p.laurie@tenthrevolution.com to chat about the details of this opportunity.