Senior Backend Engineer - AWS APIs & Leadership

OnebyZero .; Singapore; On-site; SGD 120,000 - 180,000; Full time

Benefits offered by this job

Competitive compensation

Professional growth & mentorship

Global exposure with APAC focus

Equal opportunity employer

Job summary

OnebyZero, a Singapore-based Data and AI consulting company, seeks a Senior Software Engineer I – Backend with 7–9 years of experience to lead backend development for complex, scalable systems.

You will design, implement, and optimize backend services, mentor engineers, and collaborate with cross-functional teams while delivering secure, reliable solutions on AWS. Join a fast-growing team in APAC.

Qualifications

• Strong programming in Python or TypeScript with solid backend patterns.
• Experience building scalable APIs on AWS with security in mind.
• Proven ability to design, review, and deliver robust backend systems.
• Experience leading engineers and guiding architecture decisions.

Responsibilities

• Lead backend system design, estimation, and implementation efforts.
• Build and deploy highly scalable APIs on AWS, applying best practices in networking (VPC, DNS, NLB, Cloud NAT).
• Own and optimize CI/CD pipelines and ensure secure deployments with CORS, WAF, and IAM policies.
• Act as the client-facing technical lead during discussions, deep-dives, and delivery presentations.
• Guide L3–L5 engineers, review architecture decisions, and mentor team members.
• Deliver large components/modules, ensuring reliability, maintainability, and scale.
• Balance 50% leadership (reviews, client alignment) and 50% individual contribution (core components, POCs).

Skills

Python

TypeScript

AWS

API Design

CI/CD

Leadership

Tools

Kafka

SQS

Docker

Job description

OnebyZero, a Singapore-based Data and AI consulting company, seeks a Senior Software Engineer I – Backend with 7–9 years of experience to lead backend development for complex, scalable systems.

You will design, implement, and optimize backend services, mentor engineers, and collaborate with cross-functional teams while delivering secure, reliable solutions on AWS. Join a fast-growing team in APAC.