One cross-channel platform for secure authentication of customers and payments alike, without unnecessary friction.
Senior Software Engineer – 3DS Payments
Location
Poland
Posted
2 days ago
Salary
0
Seniority
Senior
Job Description
Senior Software Engineer – 3DS Payments
Entersekt
• Design, develop and maintain backend services within the 3DS Payment’s platform • Build and maintain RESTful APIs and distributed systems • Develop and support Java applications deployed on Apache Tomcat • Design, optimise and maintain MySQL database schemas and queries • Identify and resolve performance, stability and production issues • Contribute to architectural decisions and technical tradeoffs • Ensure systems adhere to secure coding practices and compliance requirements • Collaborate with product, QA and DevOps teams throughout the delivery lifecycle • Mentor and support other engineers within the team • Take ownership of features and services from design through to production
Job Requirements
- 5 - 8+ years of professional software engineering experience with strong proficiency in Java (Java 11+ required; newer LTS versions a plus).
- Experience developing applications running on Apache Tomcat.
- Solid experience with MySQL or similar relational databases, including:
- Schema design
- Query optimisation and indexing
- Performance tuning and troubleshooting
- Experience 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
Benefits
- flexible hours
- remote work
- plenty of growth opportunities
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