Java Developer - CC Digital (f/m/x)

Sii Poland; Poznań; On-site; PLN 170,000 - 250,000; Full time

Benefits offered by this job

Great Place to Work

Solid financial situation

Centre of internal trainings

Open and accessible management team

Profit sharing

Medical care

Job summary

Sii Poland is seeking an experienced Java Developer to join our Digital Competence Center in Poznań. You will work on global projects using Java, Spring Boot/MVC, and microservices with Docker, Kubernetes, and Kafka. You will contribute to REST/GraphQL APIs, ensure code quality, and collaborate across teams.

The role requires strong English, 5+ years of experience, and a commitment to best practices, testing, and documentation. Join a large, diverse tech community at Sii Poland.

Qualifications

• 5+ years of commercial programming experience in Java.
• Practical knowledge of Spring frameworks (Spring Boot, Spring MVC) and Hibernate/JPA.
• Experience with microservices and tools: Docker, Kubernetes, Kafka.
• Relational and non-relational databases such as Oracle, PostgreSQL, MongoDB.
• Experience in developing and integrating web APIs (REST, GraphQL).
• Good engineering practices: SOLID, unit testing (JUnit), code reviews, clean code.
• Strong communication, teamwork, and English language skills.

Responsibilities

• Create, implement and test software using modern technologies.
• Add new functionalities and improve existing ones.
• Troubleshoot software problems and resolve issues.
• Prepare technical documentation for projects.
• Ensure code quality and follow programming standards.
• Collaborate with team members to understand and solve problems.
• Propose optimization options and changes.

Skills

Java programming

Spring frameworks

Hibernate/JPA

Microservices

Docker

Kubernetes

Kafka

Databases

REST/GraphQL APIs

Unit testing

Clean code

English communication

Tools

Spring Boot

Spring MVC

Hibernate/JPA

Docker

Kubernetes

Kafka

REST

GraphQL

JUnit

Job description

Sii is a place where experienced Java Developers execute global projects, working with modern technologies, microservices architecture and cloud. Our Digital Competence Center is more than 1500 experts who develop enterprise solutions for the following industries: finance, telco, e-commerce, manufacturing, retail or healthcare.

If you're looking for a stable environment, projects with real impact and opportunities for continuous development, there's a place for you at Sii. Check out what we can offer you.

Your tasks

• Creation, implementation and testing of software using modern technologies
• Adding new functionalities
• Troubleshooting software problems (troubleshooting)
• Preparing technical documentation
• Ensuring code quality and adherence to programming standards in projects
• Collaborating with other team members to better understand the problem
• Proposing new optimization options and changes

Requirements

• Minimum 5 years of commercial programming experience in Java
• Practical knowledge of Spring frameworks (Spring Boot, Spring MVC) and Hibernate/JPA
• Experience working with microservices architecture and tools: Docker, Kubernetes, Kafka
• Knowledge of relational and non-relational databases (e.g. Oracle, PostgreSQL, MongoDB)
• Experience in developing and integrating web APIs (REST, GraphQL)
• Ability to apply good engineering practices: SOLID, unit testing (JUnit), code review, clean code
• Communication skills, openness and commitment to teamwork
• Very good oral and written English language skills

Nice to have

• Cloud experience: AWS, Azure or GCP
• Knowledge of frontend technologies (e.g. Angular, React)

Job no. 260126-GW12X

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.

Benefits For You

• Great Place to Work
• Solid financial situation
• Contracts with the biggest brands
• Centre of internal trainings
• Many experts you can learn from
• Open and accessible management team
• Profit sharing
• Passion Sponsorship program
• Regular integration events and trips
• Comfortable and well-equipped offices
• MySii app
• Medical care