Senior Java Developer

Quick Facts

• Role: Senior Java Developer

• Work mode: Hybrid (1x per week onsite with the client in Warsaw)

Description

You will design, develop, and maintain backend solutions for a new CRM system in a microservices-based architecture. The work includes database design and SQL optimization, plus integration mechanisms using REST and SOAP. You will also contribute to code reviews, refactoring, and technical documentation.

Responsibilities

• Design, develop, and maintain solutions for a new CRM system
• Create and optimize database schemas and SQL queries
• Design and develop integration mechanisms using REST and SOAP
• Develop microservices-based services
• Apply design patterns and software best practices
• Participate in code reviews and refactoring to ensure high code quality
• Collaborate with project teams on technical analysis and implementation
• Prepare and update technical documentation

Requirements

• Senior-level commercial experience in Java programming, including backend application design and development
• Degree in Computer Science, Mathematics, or related field
• Strong knowledge of relational databases and SQL (schema/data structure design, indexes, transactions, and database locking)
• Knowledge of integration technologies: REST, JSON, SOAP Web Services, XML, XSD
• Experience designing and developing distributed applications based on microservices architecture
• Knowledge of design and architectural patterns
• Experience with code review using Git, Gerrit, or similar tools; experience refactoring code
• Experience with Jira and Confluence
• English proficiency enabling reading and writing technical documentation

Benefits

• B2B collaboration with transparent engagement rules and project opportunities matched to your experience and preferences
• Dedicated contract manager as the main point of contact
• Training, certifications, and conference participation (rules and funding agreed individually)
• Opportunities to join community initiatives (e.g., webinars) and optional physical activity initiatives
• Optional additional services such as private medical care, sports card, insurance, and psychological support
• Cafeteria platform to use points for selected services/products