Job description

Key Responsibilities

• Develop and maintain backend services using TypeScript, Node.js, and NestJS.
• Investigate production incidents involving duplicate payments, failed transactions, payment gateway outages, and security key issues.
• Identify root causes, propose solutions, and implement fixes in collaboration with the Tech Lead.
• Optimize PostgreSQL or MySQL queries, indexes, transactions, and database performance.
• Work with microservices communication, distributed transactions, and high-load processing scenarios.
• Implement and maintain reliable transaction flows, including idempotency and failure handling.
• Analyze data, monitor system performance, and improve application stability.
• Deliver planned development tasks and system enhancements.
• Participate in code reviews and contribute to engineering standards.
• Handle occasional frontend development tasks using React.
• Join the on-call rotation when the 24/7 SLA is introduced.

Your skills and experience

• 3+ years of commercial software development experience.
• 3+ years of hands-on, commercial NestJS experience in a production environment.
• Strong TypeScript and Node.js skills. Express-only experience does not meet this requirement.
• Experience with PostgreSQL or MySQL, including:
  • Complex SQL queries and query optimization
  • Indexing and performance tuning
  • Database transactions and concurrency considerations
• Basic React or Next.js experience and willingness to contribute to frontend tasks.
• Practical experience supporting or implementing high-load systems, such as:
  • Database and transaction optimization
  • Communication between services
  • Distributed transactions and Saga patterns
  • Identifying bottlenecks and reliability issues
• Understanding of microservices architecture and its trade-offs.
• Understanding of payment idempotency, monitoring, and testing practices.
• Experience investigating production issues and implementing corrective actions.
• English proficiency.
• Ability to work independently, take initiative, and communicate technical issues clearly.

Why you'll love working here

• Birthday leave
• Competitive salary package
• Learning & development opportunities