Lead Software Fullstack Engineer

📍 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.

Key Responsibilities:

• 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.

Requirements:

• 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).

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.