Fullstack Developer

Senior • Hybrid

Krakow, Poland

Fullstack Developer
Location: Kraków, Poland (hybrid – 2 days per week in the office)
Contract Type: B2B
Industry: Financial Services / Payments

About the Project

We are looking for an experienced Fullstack Developer (Java + React) to join an international payments platform operating in a large-scale enterprise environment. The system supports a wide range of financial transactions and payment operations across multiple regions worldwide. As part of a cross-functional Agile team, you will be involved in both backend and frontend development, contributing to the design and delivery of modern, scalable solutions built on microservices and API-first architecture.

Key Responsibilities

Design, develop, and maintain backend applications and microservices using Java.
Build and enhance modern web applications using React.
Develop and maintain RESTful APIs and microservice-based solutions.
Participate in the modernization of existing systems and migration to modern architectures.
Write clean, maintainable, and well-tested code following engineering best practices.
Contribute to automated testing, CI/CD pipelines, and DevOps initiatives.
Collaborate closely with architects, business analysts, product owners, and other development teams.
Participate in code reviews and support continuous improvement of development standards.
Troubleshoot, optimize, and enhance system performance, reliability, and scalability.

Requirements

5+ years of professional software development experience.
Strong hands-on experience with Java 11+ (Java 17 or Java 21 preferred).
Solid experience with Spring Framework and Spring Boot.
Experience designing and developing REST APIs.
Good understanding of microservices architecture.
Commercial experience with React and JavaScript/TypeScript.
Strong SQL skills and experience working with relational databases (Oracle is a plus).
Experience with Git and modern software development practices.
Hands-on experience with Kubernetes and containerized environments.
Experience working in Agile teams.
Understanding of CI/CD processes and collaboration within DevOps environments.

Nice to Have

Experience in the financial services, banking, or payments industry.
Experience with automated testing frameworks and test automation practices.
Exposure to cloud platforms such as AWS, Azure, or GCP.
Familiarity with integration patterns and high-availability systems.

What We Offer

Opportunity to work on a long-term international project with significant scale and complexity.
Exposure to modern technologies, microservices architecture, and cloud-native practices.
Real impact on product development and technical solutions.
Luxmed private healthcare package.
Multisport card.
Collaborative engineering culture focused on quality, automation, and continuous improvement.

Antal Sp. z o.o.

Antal Sp. z o.o. is a leading company in the recruitment and HR consulting industry. Established in Poland in 1996, Antal has expanded its presence to 35 countries, demonstrating a strong international footprint. The company is renowned for its flexible and comprehensive approach to recruitment, having successfully built numerous careers over the years. Antal employs over 130 professional recruitment consultants who are not only effective recruiters but also skilled advisors specializing in specific sectors and positions. The company's mission revolves around providing high-quality recruitment services and HR advice, ensuring a seamless and effective hiring process for both candidates and employers.

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