Senior Fullstack Engineer
ref nr: 240/2/2026/MG/94486
In Antal we have been dealing with recruitment for over 20 years. Thanks to the fact that we operate in 10 specialised divisions, we have an excellent orientation in current industry trends. We precisely determine the specific nature of the job, classifying key skills and necessary qualifications. Our mission is not only to find a candidate whose competences fit the requirements of the given job advertisement, but first and foremost a position which meets the candidate’s expectations. Employment agency registration number: 496.
📍 Location: Warsaw or Kraków (hybrid - 2 days in the office per week)
📄 B2B: 170 - 200 PLN / h
🏦 Industry: Financial Services / Payments
We are looking for a Senior Fullstack Engineer to join a team working on a large-scale payment platform used in enterprise environments. The platform enables fast, secure, and multi-channel financial operations.
The role focuses on building and maintaining backend and frontend services, modernizing legacy systems, and improving automation and efficiency. You will work in an Agile, DevOps-aligned environment with experienced teams.
Key Responsibilities:
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Develop and maintain services, microservices, and applications (backend and frontend) using Java 11/17/21 and ReactJS.
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Modernize legacy systems, migrating from mainframe and IBM WebSphere to API/microservice-based architectures.
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Reduce testing costs by implementing automated testing frameworks.
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Improve Straight-Through-Processing (STP) efficiency in services.
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Collaborate closely with DevOps and solution delivery teams.
Requirements:
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Strong experience with Java 11+ (Java 17+ preferred).
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Experience with Kubernetes and Git (required).
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Fluency in navigating Unix-based systems and command-line interfaces.
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Solid knowledge of SQL and relational databases (Oracle preferred).
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Practical understanding of REST APIs and microservice architectures.
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Knowledge of HTTP/Web technologies, JavaScript and React (preferred).
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Experience working in DevOps teams (preferred).
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Understanding of application monitoring (desirable).
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Knowledge of Spring / Spring Boot (desirable).
What We Offer:
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Work on a long-term, large-scale payment platform.
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Real impact on architecture, processes, and modernisation of services.
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Hybrid work model (Warsaw or Kraków).
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Mature engineering environment with focus on automation and best practices.
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Luxmed healthcare package and Multisport card.
