Lead Software Fullstack Engineer

O projekcie: 📍 Location: Warsaw or Kraków (hybrid - 2 days in the office per week) 📄 B2B: 200–250 PLN / h 🏦 Industry: Financial Services / Payments We are looking for a Lead Software Engineer (Java) to work on an international payment platform used in a large-scale enterprise environment. The system supports a variety of financial transfers and payment operations across multiple regions. This role combines technical leadership and hands-on development, including mentoring a development team and designing modern software solutions. You will work in an Agile environment with a focus on microservices, API-first architecture, and DevOps practices. What We Offer: - Work on a long-term, international project with high scale and complexity. - Real impact on architecture, standards, and best practices. - Luxmed healthcare package and Multisport card. - Mature engineering environment focused on quality and automation. Wymagania: - Minimum 10 years of professional experience in IT. - At least 3 years experience as a Lead / Tech Lead. - Strong knowledge of Java 11+ (Java 17+ preferred). - Experience with Spring / Spring Boot. - Strong SQL and relational database knowledge (Oracle preferred). - Experience designing REST APIs and microservice architectures. - Experience working in DevOps teams. - Knowledge of JavaScript / React (preferred). - Experience with Kubernetes and Git (required). Codzienne zadania: - Provide technical leadership and mentorship to the development team. - Design, develop, and maintain applications and microservices (backend and frontend). - Work with Java 11/17/21 and frontend technologies such as React. - Modernize existing systems and migrate to API/microservice-based architectures. - Implement and improve automated testing frameworks. - Enhance efficiency and automation of processing workflows (STP). - Collaborate closely with technical teams and business stakeholders.