Senior Java Developer (Payment Systems)

SPEEDNET is a software company based in Gdańsk specializing in applications for the banking, finance, and insurance industries. With over 230 developers and more than 24 years of experience, they deliver complex software solutions including product design, development, testing, and technology consulting. Their portfolio includes startup projects, business support applications, and multiplatform banking systems, focusing on banking, fintech, and insurtech sectors.

• Minimum 5 years of commercial experience developing backend applications in Java.
• Strong knowledge of Java and Spring Boot.
• Experience designing and implementing REST API.
• Knowledge of jPOS (Packager, Channel, MUX) or experience with solutions based on ISO 8583.
• Experience in designing and developing system integrations.
• Familiarity with TCP/IP communication and synchronous/asynchronous communication.
• Experience with reliability mechanisms such as retry, timeout, and idempotency.
• Experience working with application containerization using Docker.
• Proficient in English language (C1 level) for collaboration in an international environment.

Nice to have:

• Practical experience working with payment systems based on the ISO 8583 standard.

• Develop key components responsible for communication between payment systems and transaction processing.
• Implement and maintain REST API integrations.
• Participate in architectural and technological decisions for a project built from scratch.

Data controller is Speednet Sp. z o.o. based in Gdańsk. Data is processed for recruitment purposes and, with consent, future recruitments. Consent is voluntary and can be withdrawn anytime. Rights under GDPR and complaints to the UODO President apply. Details at https://speednetsoftware.com/klauzula-rekrutacyjna/