Senior Software Engineer: 3DS Payments

About the Role

Why Entersekt

Responsibilities

• You are confident working independently, contributing to architectural decisions, and mentoring other engineers, while collaborating closely with product, QA and DevOps teams. Experience in payments, fintech or other high‑security environments will be a strong advantage.
• You will contribute to system design, guide technical decision‑making, and help drive continuous improvement across the codebase and platform.
• 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

Requirements

• Successful candidates for this role will generally possess the following qualifications and skills:
• 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
• Strong problem‑solving and analytical thinking skills.
• Clear and effective communicator with both technical and non‑technical stakeholders.
• Comfortable working independently and taking ownership.
• Collaborative team player with a pragmatic, delivery‑focused mindset.
• Strong attention to quality, security and maintainability.
• We place a lot of value on how we treat prospective employees and appreciate the time and effort that goes into job hunting. That is why we aim to keep the hiring process as quick and seamless as possible while ensuring the best possible fit for both you and the company.
• Working at Entersekt is truly a dream. You get exposed to cutting-edge technology, colleagues who are leaders in their fields, and an awesome working environment that includes flexible hours, remote work, and plenty of growth opportunities.
• Apply for this position by following the "apply now" tab and or viewing our other roles at Entersekt Careers page.