Senior Fullstack Developer

Mission &

• ResponsibilitiesAs a Senior Fullstack Developer, you will design, build, and maintain modern, secure, and scalable applications that support critical business processes. You will work hands-on across both backend and frontend, contributing directly to software development rather than people management.Your mission is to ensure service continuity, high code quality, and alignment with business and security standards, while actively collaborating with international stakeholders in an English-speaking environment.Key ResponsibilitiesDesign, develop, and maintain fullstack applications (backend-focused with modern frontend)Build secure, scalable, maintainable, and testable softwareDevelop Java-based microservices using Spring BootContribute to Single Page Applications (SPA) developmentCollaborate with business and technical stakeholders on requirementsParticipate in architecture design and technical decisionsIntegrate systems using event-driven architectures (Kafka)Optimize and maintain existing codebasesImplement automated testing and CI/CD pipelinesEnsure application security (authentication, identity management)Maintain technical documentationShare best practices within developer communitiesContinuously improve skills and stay up to date with modern technologiesRequirementsBackend &
• ArchitectureJava 17–21 (modern Java, no legacy)Spring Boot 3.x (microservices)Kafka (event-driven systems)SQL (Oracle)Redis (experience or strong understanding)Domain Driven Design (DDD)FrontendNode.jsTypeScriptAngular (SPA development)Strong knowledge of Angular best practicesWebpack (nice to have)SecurityStrong web security knowledgeOIDC &
• OAuth2Identity management platforms (nice to have)OWASP awareness (certifications are a plus)DevOps &
• ToolsGitCI/CD: GitLab CI (Jenkins nice to have)Maven (nice to have)Docker &
• Kubernetes (nice to have)IntelliJ, VS CodeJira &
• ConfluenceAdditionalPython (nice to have)AI-based coding tools (nice to have)Ways of WorkingAgile (Scrum, Kanban)DevOps mindsetDistributed, international collaborationSoft SkillsStrong teamwork and collaborationAnalytical and problem-solving mindsetIndependent work on complex topicsAdaptability and results-driven attitudeContinuous learning mindsetCandidate Profile (Must-have)Strong fullstack experience (backend-only profiles will not be considered)Senior-level hands-on developer (not a manager or lead)Experience with large-scale applicationsExcellent English communication skillsWillingness to work from the office in Warsaw 2x/weekIf you're a hands-on engineer who enjoys building high-quality systems and working in an international environment — we’d love to hear from you.