Full-Stack Developer

OrgScale Recruitment; Malaysia; On-site; MYR 120,000 - 180,000; Full time

Job summary

OrgScale Recruitment is seeking a Senior Backend Engineer in Malaysia to design, build, and maintain backend services using TypeScript, Node.js, and NestJS. You will tackle production incidents, optimize database queries, and collaborate with the Tech Lead on robust solutions.

You will work on high-load systems, implement idempotent transaction flows, and contribute to microservices architecture while occasionally handling frontend tasks with React. On-call rotation may be required.

Qualifications

• 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, and 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, 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.
• Ability to work independently, take initiative, and communicate technical issues clearly.

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.

Skills

TypeScript

Node.js

NestJS

React

Next.js

High-load systems

Distributed transactions

Saga patterns

Code reviews

Independent work

Tools

PostgreSQL

MySQL

SQL optimization

Indexes

Transactions

Job description

• 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.

Requirements

• 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
  
  
  • 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.


• Ability to work independently, take initiative, and communicate technical issues clearly.