Middle Fullstack Engineer

What You'll Do Build and maintain full-stack applications using Java/Spring Boot and React/TypeScript. Develop new functionality for our Internal Operational Platform and support existing applications as the platform continues to expand. Transform AI-generated and vibe-coded MVPs into reliable, production-ready applications while preserving the original product intent. Refactor prototype logic into clean backend services, typed APIs, PostgreSQL schemas, and maintainable frontend workflows. Design and implement PostgreSQL schemas and manage database migrations with Liquibase. Develop REST APIs following an OpenAPI contract-first approach and work with typed frontend API clients. Integrate applications with BigQuery and support reliable data publishing and integration flows. Implement and maintain backend observability using Spring Boot Actuator, Prometheus metrics, and structured logging. Contribute to application quality through testing, monitoring, maintenance, and production support. Collaborate with business stakeholders and other engineers to translate real workflows into practical technical solutions. Must-have Backend: solid experience with Java, Spring Boot, REST APIs, PostgreSQL, Maven, Liquibase, Spring Security, and OpenAPI-based development. Frontend: practical experience with React and TypeScript, API-driven interfaces, and server-state management such as TanStack Query. Data & Integration: experience with BigQuery or another data warehouse and integrating applications with external APIs and data sources. Production Engineering: good understanding of authentication, persistence, logging, monitoring, testing, and maintainability. AI-Assisted Development: hands-on experience with tools such as Cursor, Claude/Anthropic, OpenAI, Replit AI, or similar, including reviewing and improving AI-generated code. Comfortable collaborating with both engineers and business stakeholders in an evolving product environment. English profficiency: level B2 or higher. Strong verbal and written communication skills. What You Get Competitive сompensation that values your expertise. 31 days of paid time off : 21 days of annual leave + 10 days of sick leave, because your health and work-life balance matter. Growth-focused environment : access to learning resources and clear pathways for growth. Fun team events: virtual cooking classes, yoga sessions, team quizzes and more A culture of trust: we cut the red tape — results over rules always. Open talk, ownership, and getting things done together. Private health insurance and FitPass: supporting your well-being both inside and outside of work. Hiring Flow Screening Interview (45 minutes): initial conversation with a recruiter. Technical Interview (up to 120 minutes): A deep dive into your functional expertise, problem-solving approach, and practical skills relevant to the role. Final Interview (Up to 60 minutes): Meet with the Team Lead for an in-depth discussion of your experience and skills. Offer: if successful, you’ll receive an offer to join our team. Location & Eligibility This role is open to applicants from Serbia. Please note that we’re unable to consider applications from outside these locations. Thanks for your understanding! #J-18808-Ljbffr AI Digital