Senior Java Back End Developer

Job Description
Position:
Senior Back End Java Developer

Location:
Krakow,Wroclaw,Warsaw

**Type of work: Hybrid (2-3 days per week in office)- obligatory

Contract: only contract of employment
Salaries:**
base+ financial bonus

Please note: for this role we can not consider candidates who require company support to legally live and work in Poland
Responsibilities

• Develop web applications using the Java/Spring stack.
• Handle requirements, decompose user stories, and manage middle/junior engineers.
• Understand and implement scrum team roles and agile development methodology.
• Design and develop distributed systems and software architecture.
• Refactor code, perform performance and memory tuning.
• Manage build systems (Maven or Gradle), including dependency management, build lifecycle, release, and version management.
• Utilize Git branching models (git flow, GitHub flow) for version control.
• Work with frameworks such as Spring, ORM, messaging, security, batch, and integration.
• Design and manage databases, ensuring consistency models, SQL, and distributed transactions. Implement microservice architecture patterns and best practices, including communication patterns (HTTP, messaging, gRPC, CQRS).
• Design APIs following best practices, including API First approach.
• Solve complex algorithms and problems efficiently.

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.

We Offer

• Multisport card and MyBenefit program
• Medical care
• Career in the multinational company
• Opportunity to take part in international projects and gain experience with various businesses
• Set of social benefits to choose from
• Salary adequate to your competencies + quarter bonus
• Training program

Why Infosys
Infosys is a global leader in next-generation digital services and consulting. We enable clients in more than 50 countries to navigate their digital transformation. With over three decades of experience in managing the systems and workings of global enterprises, we expertly steer our clients through their digital journey. We do it by enabling the enterprise with an AI-powered core that helps prioritize the execution of change.