Senior Java Software Engineer

• Position: Senior Java Software Engineer

• Salary: up to 30 000 PLN

• Working model: hybrid from Katowice

We are looking for a Senior Software Engineer for our client — a global technology organization providing large-scale, high-performance software solutions used by hundreds of thousands of users daily.The company combines strong in-house engineering expertise, advanced technology, and a people-first approach to deliver top-tier products and services.

You’ll be part of a growing Tech Hub based in Katowice, collaborating closely with international teams across Europe and other global locations.

The role:

In this role, you will design, build, and deliver core applications that power the company’s main platform.You’ll work alongside Product Managers, Business Analysts, and QA specialists to create high-quality software, implement new features, and ensure top performance and scalability.

This position is a great opportunity for someone who enjoys working in a collaborative, global environment and wants to have a real impact on key business applications.

Responsibilities:

• Design, develop, and enhance complex software solutions

• Collaborate with Product, Architecture, and QA teams through all phases of SDLC

• Write unit and integration tests, participate in design and code reviews

• Develop prototypes and test programs when needed

• Provide technical evaluation and recommendations on key engineering decisions

• Offer technical guidance and mentorship to less-experienced team members

Requirements:

• At least 5 years of experience with Java

• Strong knowledge of Object-Oriented Programming, principles, and design patterns

• Solid experience with SQL and exposure to Hibernate / JPA / Spring JDBC

• Proven experience building RESTful services

• Focus on performance and scalability optimization

• Familiarity with development tools such as IntelliJ, JUnit, JMeter, Maven, Jenkins, Git, Jira

• Ability to lead technical projects; Tech Lead experience is a plus

• Excellent communication and problem-solving skills, proactive and collaborative approach

Nice to have:

• Experience working with multi-tier, asynchronous, distributed architectures

• Understanding of multithreading and concurrency

• Experience with data modeling and transformations (XML, XML Schema, XSLT)

• Exposure to message brokers (e.g. RabbitMQ)

• Knowledge of NoSQL databases (e.g. MongoDB)

• Cloud experience (AWS, Azure, or GCP) and containerization (Docker, Kubernetes)

• Understanding of network protocols and basic Unix skills

The offer:

• Flexible form of cooperation (B2B or Employment Contract)

• Competitive salary and annual bonus plan

• Private medical care and group life insurance

• Hybrid work model — 2 days per week from home

• MyBenefit cafeteria platform and lunch vouchers

• Holiday allowance and paid lunch break (30 minutes)

• Tax-deductible costs and other financial advantages