Senior Full-Stack Java Engineer – Cloud, APIs & Mentoring

SoftServe; Polska; On-site; PLN 180,000 - 240,000; Full time

Job summary

SoftServe is seeking a Senior Full-Stack Java Engineer to work on large-scale corporate systems supporting calls, proposals, grants, audits, and funding management within a European public-sector environment.

You will develop and maintain secure, scalable applications across backend, frontend, APIs, databases, cloud, and CI/CD while also contributing to code reviews, mentoring, requirements refinement, and production support.

Qualifications

• University degree corresponding to EQF Level 6 (Bachelor’s degree or equivalent).
• 7+ years of professional IT experience.
• Strong Java backend expertise with Spring Boot, Hibernate, and REST API development.
• Strong knowledge of JavaScript, HTML, and CSS.
• Experience with PostgreSQL, Oracle, and MongoDB; schema design and query optimization.
• Experience with WebLogic, JEE, and EJB.
• Experience with AWS or Azure and cloud deployment.
• Experience designing and securing REST APIs with OpenAPI/Swagger.
• Strong knowledge of OAuth 2.0, OpenID Connect, and JWT.
• Knowledge of Angular, React, Vue, or Bootstrap.
• Experience with Maven, GitLab, Bamboo, Jenkins, Nexus, or similar CI/CD/build tools.
• Experience with Jira, Git, Bitbucket, and wiki-based collaboration tools.
• Experience with Docker and Kubernetes.
• Knowledge of SOA and service bus architectures.
• Experience with Agile and Scrum.
• Experience with JUnit and Mockito.
• Experience with SonarQube, SonarLint, Fortify, or similar code analysis tools.
• Experience with Apache Camel.
• Experience with Drools or similar rule engines.
• Experience with AI coding tools such as Amazon Q or Kiro.
• Knowledge of system analysis and project management will be a plus.
• Strong mentoring, communication, and technical leadership skills.
• English or French proficiency at B2 level or higher.

Responsibilities

• Develop and maintain front-end and back-end application components.
• Implement business logic, responsive UI, APIs, and database interactions.
• Design and secure RESTful APIs and web services.
• Apply security best practices for authentication, authorization, storage, logging, and monitoring.
• Perform unit and integration testing, debugging, and production troubleshooting.
• Deploy applications using cloud platforms, CI/CD pipelines, Docker, and Kubernetes.
• Monitor lower environments, performance, and application stability.
• Perform code reviews and support technical onboarding and mentoring.
• Collaborate with QA teams and participate in requirements refinement and estimation.
• Maintain technical documentation and code quality standards.

Job description

SoftServe is seeking a Senior Full-Stack Java Engineer to work on large-scale corporate systems supporting calls, proposals, grants, audits, and funding management within a European public-sector environment.

You will develop and maintain secure, scalable applications across backend, frontend, APIs, databases, cloud, and CI/CD while also contributing to code reviews, mentoring, requirements refinement, and production support.