Senior Full Stack Developer

🇵🇱 Poland 100% Remote 35–45 EUR/hour b2b or permanent (2 seats) A market leader in automotive financing and mobility runs its customer-facing sales journey on one large platform. We're hiring engineers to join the team that builds and evolves it. Who We Are Specific-Group is an owner-managed software company with 25 years on the market and around 550 engineers across 10+ countries. Approximately 80% of our engineers are senior-level professionals, and our employee retention is nearly twice the industry average. We work primarily in the financial sector, with additional projects in insurance, healthcare, automotive, and AI. The Project Our client is a market leader in automotive financing and mobility, providing leasing, loans, insurance, vehicle maintenance, car-sharing, and car-subscription services across 15 countries. You'll help build the platform that takes customers from an initial offer to a signed contract. The system includes a backend of Java microservices and an Angular frontend with complex forms, integrating dozens of external providers and brokers. Tech Stack: Java 17 • Spring Boot 3.x • Angular (LTS) • Spring Security/OAuth2 • Spring Integration/WebClient • PostgreSQL • OpenShift • GitLab CI/CD • Datadog The Challenges Complex Forms Develop Angular Reactive Forms with cross-field validation and asynchronous state handling driven by external provider feedback. Provider Integration Build fault-tolerant, non-blocking communication with external provider systems while maintaining high performance under third-party latency. Regulated Domain Work with leasing, credit, and insurance processes requiring data consistency, strict schema versioning, and optimized query performance. Responsibilities Build full-stack features end-to-end using Java/Spring Boot and Angular.Develop microservices integrating with external provider systems using WebClient and Spring Integration.Implement advanced Angular Reactive Forms with cross-field validation and asynchronous workflows.Collaborate with the Technical Architect on interface design and provider authentication (Spring Security, OAuth2/OIDC).Ensure quality together with a dedicated QA engineer and monitor system performance using Datadog. Requirements Must Have Strong commercial experience with Java 17 and Spring Boot 3.x in large-scale production systemsAngular (LTS) and TypeScript, including solid experience with Reactive FormsSpring Security and OAuth2/OIDCHands-on experience with microservices in production environmentsEnglish level C1 or higher Nice to Have PostgreSQLOpenShiftGitLab CI/CDDatadogExperience in finance, insurance, or other regulated, data-heavy industriesGerman language skills The Team Fully senior environment with an average of 14+ years of development experience.Scrum teams distributed across Vienna, Salzburg, and Poland.Team setup: 5 Engineers, 1 Technical Architect, 1 QA Engineer, and 1 Scrum Master.You will join an existing Specific-Group engineering cluster in Poland. Hiring Process Screening call with Specific-Group Recruiting (~30 min)Technical interview with the Technical Architect/Lead Developer (~60–90 min)Interview with the Client Project Lead and Lead Developer (~45–60 min)Contract offerTypical timeline: 2–3 weeks end-to-end. Location: Fully remote from Poland, with 2–3 business trips to Vienna per year. Diversity & Inclusion Specific-Group is an equal opportunity employer. We welcome applications regardless of gender, age, origin, religion, disability, or sexual orientation. Privacy Notice GDPR: https://spg-docs.s3.eu-central-1.amazonaws.com/PL/GDPR_recruitment.pdf