Senior Software Engineer - Java / AWS

We are a joint venture between OBI and Reply Group, responsible for co-designing, building and operating mission-critical digital platforms for commerce, customer service, and omnichannel retail. Our mission is to unite technology leadership with deep retail vision to implement standardized processes and scalable digital products that drive efficient support for one of Europe’s largest DIY retailers. We leverage proven best practices to advance the internationalization of products and the digital mindset of our partners, delivering consistent and business-critical solutions to support the targets of our customer.

• Successfully completed a degree in computer science, mathematics, physics, or a comparable field.
• Several years of professional experience in backend development of web-based, scalable systems and applications.
• In-depth knowledge of Java, Spring Boot, AWS, and SQL-based databases such as PostgreSQL.
• Experience in development, deployment, and operation of distributed systems; familiarity with Docker, Kafka, and Terraform.
• Extensive experience in e-commerce, especially with payment processes like authorizations, captures, refunds, or integration with payment providers such as Adyen, Stripe, Paypal.
• High quality awareness including unit and integration tests, static code analysis, and performance tests to enable continuous deployment.
• Interest in areas beyond backend development/architecture such as frontend, DevOps, security, process optimization, with active pursuit of further training and knowledge sharing.
• Fluent communication skills in English and Polish.
• Openness to hybrid work and regular visits to the Katowice office.

• Design and implement highly available and scalable backend components for payment services within the transactional platform using Java, Spring Boot, Apache Kafka, and AWS.
• Support the product development process from initial idea through implementation to continuous operation, in constant exchange with the Product Owner.
• Take end-to-end responsibility for systems developed by the team, including architecture, development, technology selection, QA, security, DevOps with continuous deployment, and operations with monitoring and alerting.
• Collaborate closely in a cross-functional Scrum team with pair programming and code reviews, proactively sharing knowledge and experience.