Senior Backend Engineer

Why PayNet / Why Now

• Strengthen backend platforms critical to onboarding participants into Malaysia’s payment ecosystem
• Scale and stabilize systems as onboarding volumes, complexity, and integration demands increase
• Reduce long-term operational and performance risk through better backend architecture and design
• Own backend decisions that directly affect platform reliability, security, and partner experience

TL;DR

• Design and own backend services that underpin critical participant onboarding platforms
• Build scalable, secure, and high-performance systems used at national scale
• Act as a senior technical owner, shaping architecture and delivery standards
• Mentor engineers while ensuring production-grade reliability and maintainability

Why This Role Matters

• Backend systems directly impact the reliability and scalability of national payment onboarding
• Poor architectural decisions create long-term operational risk and rework
• Senior engineers set the technical bar for quality, performance, and security
• Strong backend ownership enables faster delivery without compromising stability

What You Will Actually Do

• Design and lead architecture for scalable, high-performance backend systems
• Develop and maintain backend services and RESTful APIs using Java, Golang, or Python
• Design and optimize database schemas and queries to ensure performance and data integrity
• Own end-to-end delivery from design through deployment and post-release stability
• Review code, mentor junior engineers, and uphold engineering best practices
• Troubleshoot complex production issues and drive continuous system improvement

Examples of This Role in Practice

• Designing a backend service that scales onboarding without latency or failure risk
• Refactoring database queries to remove performance bottlenecks
• Leading code reviews that prevent security or reliability issues
• Resolving a critical production incident through deep root-cause analysis
• Collaborating with frontend, DevOps, and product teams to deliver secure solutions

What Will Help You Succeed

Required

• Strong proficiency in Java with deep understanding of OOP, SOLID principles, and Design Patterns, along with strong hands-on experience in Spring Boot, including core concepts such as dependency injection, request lifecycle, and framework design decisions.
• Proven ability to design and build end-to-end scalable backend systems, including RESTful APIs and overall system architecture.
• Strong understanding of system design principles, including scalability, performance, reliability, and maintainability.
• Solid experience with relational databases (SQL), including schema design, query optimisation, and performance tuning.
• Strong problem-solving ability to analyse, debug, and resolve complex technical issues systematically.
• Good understanding of unit testing and test strategy design.
• Ability to mentor junior engineers, conduct code reviews, and drive engineering best practices.
• Experience working in an Agile environment.

Good to Have

• Exposure to other backend languages/frameworks (e.g. Golang, Node.js)
• Experience with microservices and distributed systems architecture
• Experience with AWS cloud services
• Experience with Linux command-line
• Integration with third-party APIs and external services
• Familiarity with CI/CD pipelines and deployment automation
• Knowledge of backend security practices (authentication, authorization, data protection)
• Experience with monitoring, logging, and performance tuning tools