Senior/Staff Backend Engineer - AI Platform

ExpressVPN; Singapore; On-site; SGD 80,000 - 110,000; Full time

Job summary

A leading technology company in Singapore is looking for a Senior Backend Engineer (Node.js) to join their infrastructure team. This role involves designing and maintaining backend services for a large-scale AI-driven platform. The ideal candidate should have over 5 years of experience in backend development, particularly in Node.js, and a strong understanding of system design and AWS. This position emphasizes code ownership and high-performance systems.

Qualifications

• 5+ years of backend development experience.
• Deep understanding of system design and distributed services.
• Production experience with AWS.

Responsibilities

• Design, build, and maintain backend services and APIs.
• Implement high-performance data and caching layers.
• Ensure observability, stability, and scalability.

Skills

Node.js (Express / Fastify / Nest)

System design

Redis

Keycloak or OpenID Connect

AWS

Docker

Tools

TypeScript

Kubernetes

Terraform

Job description

We’re looking for a Senior Backend Engineer (Node.js) to join a small, focused infrastructure team inside an enterprise company. The team is building a new large-scale, AI-driven platform - designed for performance, security, and reliability from day one.

What You’ll Do

• Design, build, and maintain backend services and APIs
• Develop authentication, authorization, and token-based systems
• Implement high-performance data and caching layers (Redis, etc.)
• Ensure production-grade observability, stability, and scalability
• Collaborate with senior engineers across infrastructure and AI teams

What We’re Looking For

• 5+ years of backend development in Node.js (Express / Fastify / Nest)
• Deep understanding of system design, distributed services, and scaling
• Solid experience with Redis (clustering, atomic ops, pub/sub)
• Hands‑on experience with Keycloak or OpenID Connect
• Production experience with AWS (EC2, ElastiCache, IAM, CloudWatch) and Docker
• Proven ability to deliver secure, reliable, and maintainable backend code

Nice to Have

• Experience with TypeScript
• Familiarity with Kubernetes or Terraform
• Background in high‑performance or GPU‑based systems

Why you will like it here:

An enterprise company with a small, experienced team. The work focuses on building and maintaining backend infrastructure for AI‑related systems, using modern technologies, clear engineering standards, and full ownership of your code.

#LI-NL1

Before you apply

• At the moment, we do not sponsor visas in the EU. For Hong Kong, we require at least two years of working experience and a university degree in a related field. For Singapore and the UK, we can only sponsor visas for mid‑career or above.
• Please upload your resume as a PDF and do not include any salary or compensation information in it.