Full Stack Developer at Centah managing integrations and API features for a scalable SaaS platform. Contributing to system reliability and mentoring less experienced engineers.
About the role
- Senior Software Engineer developing and maintaining payment processing solutions for a global fintech company. Collaborating with cross-functional teams and mentoring junior engineers.
Responsibilities
- Design, build, and maintain backend services for payment processing
- Integrate and support payment service providers (PSPs) and acquirers such as Adyen, Checkout.com, JP Morgan Chase, and others
- Build scalable, event-driven architectures to handle high-throughput, low-latency payment workloads
- Write clean, testable, well-documented code with strong unit and integration test coverage
- Optimize database queries and schema design across MySQL
- Contribute to system design discussions, code reviews, and technical decision-making
- Monitor system health, troubleshoot production issues, and drive continuous improvements in observability and reliability
- Participate actively in CI/CD pipeline improvements and deployment processes
- Mentor junior engineers and contribute to a culture of engineering excellence
Requirements
- 4+ years of backend engineering experience in production-grade systems — preferably within Fintech, Banking, or Payments — with strong proficiency in PHP and/or Golang; candidates with equivalent experience in comparable languages will be considered.
- Hands-on experience with payment processing and PSP/acquirer integrations
- Solid understanding of end-to-end payment flows: authorization, capture, refunds, chargebacks, and reconciliation
- Strong grasp of OOP principles, design patterns, and clean architecture
- Proficiency in SQL, database design, and query optimization
- Experience with message queues (RabbitMQ, Kafka) and caching layers (Redis)
- Strong fundamentals in algorithms and data structures with practical application
- Experience writing unit and integration tests as a core part of your workflow.
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