Senior Java Architect

💼 B2B contract | Full-time | Level: Senior 

🕐 Hybrid work model (1–2 days per week in the office) 

🌍 Remote recruitment 

Technologies we use 

Required:  Spring Framework, Hibernate, Oracle, PLSQL, Docker, Linux, AWS 

Tech environment:   Java 8 / Java 17, Spring (Core), Hibernate, EclipseLink, Oracle, PL/SQL, RESTful APIs, SOAP, Tomcat / Tomee, JSP, Struts (legacy), GitHub, TeamCity, JUnit 

Your responsibilities 

• Shaping and evolving the architecture of backend systems, focusing on long-term maintainability and performance 

• Preparing and maintaining technical documentation and architectural guidelines 

• Collaborating closely with developers on implementation strategies, reviews, and hands-on support when needed 

• Participating in technical analysis and proposing scalable solutions for business requirements 

• Establishing and promoting best practices in software quality, security, and maintainability 

• Choosing appropriate tools and technologies for continuous improvement of the tech stack 

• Troubleshooting and resolving complex issues, including performance bottlenecks 

• Sharing expertise across the team and supporting the development of less experienced engineers 

• Contributing to the definition of the technical roadmap and participating in architecture board meetings 

Our requirements 

• Minimum 10 years of professional experience in backend development with Java 

• Experience in similar senior roles (e.g. Software Architect, Tech Lead, Principal Engineer) 

• Excellent knowledge of Spring, Hibernate, Oracle/PLSQL, and integration patterns (REST/SOAP) 

• Solid understanding of Docker, Linux, and cloud services – ideally AWS 

• Comfort in working with both legacy code and modernizing complex systems 

• Strong communication skills – ability to work closely with business stakeholders, lead discussions, and explain technical decisions 

• Confidence in presenting and defending architectural choices in an international context 

• Very good command of English (C1 level) – both spoken and written 

• Willingness to join the office once a week (Katowice – hybrid model) 

• Openness to work across the stack (e.g. understanding frontend architecture or collaborating with frontend teams – React is used internally) 

Growth & Benefits 

• Participation in conferences in Poland and abroad 

• Development budget, internal and external trainings 

• Time for developing your own ideas 

• Knowledge-sharing and support of IT events 

• English lessons 

• Flexible working hours 

• Partially or fully funded training 

Would you like to join an international team and work on ambitious projects?  Apply today and grow with us!