JVM Software Engineer with GoCardless (f/m/x)

Senior • Remote

Bialystok, Poland

We are looking for a Senior Backend Engineer experienced in JVM technologies to join a remote product development team working on large‑scale payment processing solutions. The role involves contributing to a long‑term initiative aimed at enhancing payment flows and supporting key business requirements through modern, service‑oriented architecture.

Your tasks

Designing and developing backend services using JVM technologies in a cloud‑native environment
Creating and maintaining integrations between internal systems and external payment providers
Implementing event‑driven communication patterns and message‑based workflows
Ensuring the scalability, performance, and reliability of distributed microservices
Collaborating closely with product and architecture teams to deliver compliant payment features
Participating in code reviews and contributing to the continuous improvement of engineering practices

Requirements

Minimum 5 years of commercial experience in backend development within the JVM ecosystem
Hands‑on background in integrating external payment platforms or similar financial APIs
GoCardless integration experience
Familiarity with cloud‑based relational databases and container orchestration tools
Experience with messaging systems and asynchronous communication patterns
Knowledge of direct debit flows or instant bank transfer mechanisms will be a strong advantage
Strong command of English, both spoken and written
Residing in Poland required

Sii

Sii is a company recognized as a "Great Place to Work" since 2015, thanks to employee feedback and the implementation of new ideas. Established in 2006, Sii has demonstrated financial stability with a revenue of 2.1 billion PLN and no debts. The company shares its profits with employees, having allocated over 76 million PLN for this purpose since 2022. Sii offers a rich benefits package, including private healthcare, a cafeteria platform, and discounts on cars. Employees can work in comfortable A-class offices or remotely. Sii is involved in numerous fascinating projects for prestigious global brands and invests 1 million PLN annually to support employee passions and volunteer actions. The company emphasizes personal development through meetups, webinars, a training platform, and a technology blog. Sii is characterized by a fantastic atmosphere created by its "Sii Power People."

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