This is a fully remote position, open to applicants in Poland.

• Design, develop, and maintain backend services within the 3DS Payments platform.

• Build and uphold RESTful APIs and distributed systems.

• Develop and support Java applications deployed on Apache Tomcat.

• Design, optimize, and maintain MySQL database schemas and queries.

• Identify and resolve performance, stability, and production issues.

• Contribute to architectural decisions and technical trade-offs.

• Ensure systems comply with secure coding practices and regulatory requirements.

• Collaborate with product, QA, and DevOps teams throughout the delivery lifecycle.

• Mentor and support fellow engineers within the team.

• Take ownership of features and services from design to production.

• 5 - 8+ years of professional software engineering experience with a strong proficiency in Java (Java 11+ required; newer LTS versions are a plus).

• Experience in developing applications that run on Apache Tomcat.

• Solid experience with MySQL or similar relational databases, covering:

• Schema design.

• Query optimization and indexing.

• Performance tuning and troubleshooting.

• Experience in building RESTful APIs and working with distributed systems.

• Strong understanding of software design principles (OOP, SOLID, clean architecture).

• Experience using Git or similar version control systems.

• Strong understanding of secure coding practices, including OWASP Top 10.

• Experience working in regulated environments (e.g., PCI DSS, GDPR).

• Experience handling sensitive data such as cardholder data or PII.

• Nice-to-have:

• Experience with AWS (EC2, RDS, S3, IAM, CloudWatch).

• Exposure to cloud-native or cloud-migrated architectures.

• Experience with Docker and/or Kubernetes.

• Familiarity with CI/CD pipelines and DevOps practices.

• Experience in payments, fintech, or other high-security domains.

• Flexible hours.

• Remote work.

• Plenty of growth opportunities.

Senior Software Engineer – 3DS Payments

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