Lead Java Developer (f/m/x)

Sii Polska offers contracts with major brands and a diverse portfolio of clients, supported by internal training, mentoring, and numerous employee programs. The company has comfortable, well-equipped offices and a solid financial position.

• At least 8 years of professional experience in software engineering with Java
• Previous experience as a Technical Lead, Lead Developer, Senior Developer with mentoring responsibilities, or a similar leadership role
• Strong expertise in Java 17+ and Spring Boot
• Solid understanding of software architecture, distributed systems, and RESTful API design
• Fluency in English and Polish
• Residing in Poland
• Open to a hybrid working model with presence in the office 3 days per week
• Availability to support production releases approximately 1–2 times per month during weekends (around 2 hours per occurrence)

• Leading technical design discussions and driving architectural decisions across the team
• Evaluating and proposing technical solutions to ensure scalability, maintainability, and performance
• Providing technical guidance and support to developers throughout the software development lifecycle
• Designing and developing backend services and REST APIs using Java and Spring Boot
• Performing hands-on coding for complex features and critical system components
• Supporting production releases and ensuring platform stability

• Fluency in English and Polish required
• Residing in Poland required
• Hybrid working model with presence in the office 3 days per week
• Availability to support production releases on weekends (1–2 times per month)