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Senior Java Engineer (AI-Assisted Modernization) Job Opening In Warsaw – Now Hiring Confidential


Job description

About the Company:


The Client is a European tech consultancy operating in the SaaS and enterprise solutions sector.
They build large-scale modernization and automation projects using modern technologies such as Java, AI-assisted development, cloud platforms, and microservices architectures.


The team is international, innovation-driven, and remote-first, and they’re now looking for a Senior Java Engineer (AI-Assisted Modernization) to join them and support the next stage of growth.

Responsibilities:



  • Analyze and refactor a large-scale Java monolith (5M+ lines of code) into a microservices architecture




  • Design, implement, and maintain microservices and REST APIs




  • Integrate backend services with modern frontends (Vue.js 3)




  • Introduce and promote AI-assisted development practices (GitHub Copilot, Cursor)




  • Collaborate with architects, backend, and frontend teams to ensure cohesive solutions




  • Write and maintain automated tests, ensuring code quality and security standards




  • Participate in CI/CD processes and optimize delivery pipelines




  • Mentor junior team members and share best practices



Qualifications:



  • 6+ years of experience as a Backend/Java Engineer




  • Proven track record of migrating monolithic systems to microservices




  • Strong proficiency in designing and implementing REST APIs




  • Experience integrating with modern frontend frameworks (Vue.js, React, Angular)




  • Hands-on practice with AI code assistants (GitHub Copilot, Cursor)




  • Knowledge of CI/CD tools (Azure DevOps, GitLab, Docker)




  • Strong communication skills and ability to work in distributed teams (English B2+)




  • Nice to have: Python + LangChain (AI pipelines), Kubernetes (AKS), SonarQube, automated API testing



Benefits:



  • B2B contract: 170–180 PLN/h (net)




  • Contract duration: minimum 6 months with extension option




  • Remote-first work model within CET ±2h time zone




  • Opportunity to modernize a large-scale enterprise system (monolith → microservices)




  • Work with cutting-edge AI-assisted development tools (Copilot, Cursor)




  • Transparent recruitment process with fast decision-making




  • Flexible working environment and experienced engineering team



Required Skill Profession

Computer Occupations


  • Job Details

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