Full-Stack Engineer (Cloud & DevOps)

About theRole:

At Xtremax, we are looking for an experienced DevSecOps Engineer (Senior Consultant) to design, build, and operate secure, cloud-native, containerised infrastructure on AWS for a Singapore public sector modernisation project. The role combines infrastructure engineering, cloud security, and secure software delivery, embedding security across infrastructure and the development lifecycle.

Responsibilities

● Set up modern cloud-native, containerised infrastructure on AWS using Infrastructure as Code (e.g. Terraform), covering VPC networking, EKS/ECS, RDS, and container registry across dev, staging, and production environments.

● Apply cloud security practices and controls, including least-privilege IAM, EKS Pod Identity, network isolation, system and container hardening, mTLS, secrets management, and encryption at rest and in transit.

● Build security into the development process by integrating SAST, dependency, secret, container image, and IaC scanning into GitLab CI/CD pipelines, with defined pass/fail gates.

● Set up and maintain monitoring, alerting, and observability using tools such as Dynatrace or Datadog.

● Support production deployments and incident resolution, including writing and maintaining runbooks.

● Design, implement, and regularly test backup and restore procedures.

● Integrate infrastructure with identity and access controls (e.g. ADFS, WOG AD, SAML, OIDC, CAM). Additional responsibilities for Senior Consultant

● Define the secured infrastructure architecture and security baseline for the platform.

● Set up and govern secure infrastructure standards, guardrails, and practices across the team.

● Provide guidance and mentoring to engineers on secure infrastructure and DevSecOps practices.

● Work with agency security teams on security reviews, compliance requirements, and remediation of findings.

Requirements Experience

● Senior Consultant: 7+ years of experience, including at least 2–3 years defining secure cloud architecture or leading DevSecOps implementation.

● Experience with Singapore Government or public sector security and compliance requirements is an advantage.

Technical skills (must have)

● AWS: hands-on experience with setting up AWS cloud infrastructure ● Infrastructure as Code: hands-on experience with Terraform (or equivalent)

● Containers: hands-on experience with Docker, Kubernetes (EKS) ● CI/CD: hands-on experience in setting up CI/CD

● Security: hands-on experience with application and infra security practices

● Security scanning tools: hands-on experience with security scanning tools

● Observability: hands-on experience with at least one observability tool

● Operations: hands-on experience in production operations

Technical skills (good to have)

● Familiarity with observability tools such as Dynatrace, Datadog

● Familiarity with building, containerising, and deploying applications in Golang, Kotlin, and Next.js/TypeScript, and with operating a workflow engine such as Temporal on Kubernetes

● Identity: ADFS, WOG AD, SAML, OIDC, CAM (GovTech Central Accounts Management)

● Trend Micro FAM and other infrastructure/container security tooling ● OutSystems, Oracle Policy Automation (OPA) / Oracle Intelligent Advisor (OIA), Sitefinity, Oracle Soft skills

● Security-first mindset with a practical, delivery-focused approach. ● Clear documentation and communication skills.

● Senior Consultant: ability to influence engineering teams and explain security trade-offs to stakeholders.

Data Protection Notice:

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