Senior Full Stack Engineer - A26423

ACTIVATE INTERACTIVE PTE LTD; Singapore; On-site; SGD 120,000 - 180,000; Full time

Benefits offered by this job

Market-competitive salary

Flexible benefits

Wellness & learning

Job summary

ACTIVATE INTERACTIVE PTE LTD is seeking Senior Full Stack Engineers to modernise a Singapore public sector digital service. You will migrate legacy systems to a cloud-native, containerised platform on AWS, building frontends with ReactJS/TypeScript and backends in Golang/Kotlin.

You will set up secure AWS infrastructure with Terraform, integrate authentication (Singpass/Corppass) and RBAC/ABAC, and lead multi-workstream delivery while mentoring the team.

Qualifications

• Experience migrating or modernising legacy systems.
• Experience delivering government/public sector projects is a plus.
• Frontend: ReactJS, TypeScript.
• Backend: Golang and/or Kotlin.
• DevOps: CI/CD, Docker, Kubernetes.
• Cloud: AWS architecture and services.
• Infrastructure as Code: Terraform.
• Observability: tool experience (e.g., Dynatrace, Datadog).
• Knowledge of Singpass, Corppass, OIDC, or SAML is advantageous.

Responsibilities

• Migrate legacy applications to a modern, cloud-native stack.
• Build responsive web frontends using ReactJS and Next.js.
• Develop backend services in Golang and/or Kotlin and implement workflows with Temporal.
• Configure secure AWS infrastructure with Terraform and manage CI/CD pipelines in GitLab.
• Integrate security controls and authentication (OIDC, SAML, Singpass).
• Lead delivery across multiple workstreams and mentor junior engineers.
• Define architecture and target state for the modernised platform.

Skills

ReactJS

TypeScript

Golang

Kotlin

AWS

Docker

Kubernetes

CI/CD

Security

Next.js

RBAC/ABAC

Observability

Temporal

Tools

GitLab

Terraform

Dynatrace/Datadog

S3/EKS/ECS/EC2/Lambda/RDS

Job description

Activate Interactive Pte Ltd (\"Activate\") is a leading technology consultancy headquartered in Singapore with a presence in Malaysia and Indonesia. Our clients are empowered with quality, cost-effective, and impactful end-to-end application development, like mobile and web applications, and cloud technology that remove technology roadblocks and increase their business efficiency.

We believe in positively impacting the lives of people around us and the environment we live in through the use of technology. Hence, we are committed to providing a conducive environment for all employees to realise their full potential, who in turn have the opportunity to continuously drive innovation.

We are searching for our next team members to join our growing team.

If you love the idea of being part of a growing company with exciting prospects in mobile and web technologies that create positive impact on people's lives, then we would love to hear from you.

What will you do?

We are looking for Full Stack Engineers to modernise a Singapore public sector digital service. The team will migrate a legacy tech stack to a modern, cloud-native, containerised platform on AWS. Engineers will build and configure products end to end, from frontend to backend, infrastructure, security integration, and production support.

• Develop and configure products, migrating legacy applications to a modern cloud-native, containerised tech stack.


• Build responsive, accessible web frontends using ReactJS, TypeScript, and Next.js.


• Develop backend services and APIs in Golang and/or Kotlin, including long-running business processes using a workflow engine (e.g. Temporal).


• Set up and maintain secure AWS infrastructure using Infrastructure as Code (e.g. Terraform).


• Implement security controls and monitoring, including authentication and identity integration with Singpass, Corppass, OIDC, and SAML.


• Build and maintain CI/CD pipelines in GitLab, and deploy workloads to Kubernetes (EKS). Instrument applications for observability using tools such as Dynatrace or Datadog.


• Support production deployments, troubleshoot issues, and take part in incident resolution.


• Define the technical architecture and target state for the modernised platform.


• Lead delivery across multiple workstreams, coordinating with product owners, DevSecOps, and agency stakeholders.


• Provide strategic technical guidance, set engineering standards, and mentor team members. Plan legacy-to-modern migration approaches, including sequencing, risk management, and cutover. Write clean, tested, well-documented code and take part in code reviews.

What are we looking for?

• Experience migrating or modernising legacy systems is strongly preferred.


• Experience delivering Singapore Government or public sector projects is an advantage.


• Frontend: ReactJS, TypeScript


• Backend: Golang and/or Kotlin;


• DevOps: CI/CD, Docker, Kubernetes


• Cloud: AWS architecture and services


• Infrastructure as Code: Terraform (or equivalent)


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


• Experience with Next.js


• Experience in setting up AWS cloud infrastructure (e.g. S3, EKS / ECS, EC2, Lambda, RDS, Load Balancers, API Gateway)


• Experience with a workflow engine (e.g. Temporal)


• Experience with a rules engine (e.g. Gorules, Open Policy Agent)


• Familiarity with observability tools such as Dynatrace, Datadog


• Implemented authentication using OIDC, SAML


• Implemented authorisation using RBAC, ABAC


• Government identity and security tooling: Singpass, Corppass, ADFS, WOG AD, CAM (GovTech Central Accounts Management), Trend Micro FAM


• Infrastructure and container security practices


• OutSystems, Oracle Policy Automation (OPA) / Oracle Intelligent Advisor (OIA), Sitefinity, Oracle


• Strong problem-solving and debugging skills in production environments.


• Clear communication with technical and non-technical stakeholders.


• Senior Consultant: proven leadership, stakeholder management, and ability to drive decisions.

What do we offer in return?

• Competitive Compensation: Market competitive salary and variable performance bonus aligned to your skills, impact, and contribution.


• Benefits: Outpatient medical, specialist medical coverage and generous customisable flexi benefits, or flexi allowance; life and health insurance, thoughtful perks like special occasions \"red packet\" and CNY goodies, etc.


• Employee Wellness: Support for your physical, mental, and overall well-being through year-round initiatives.


• Growth & Development: Learning programmes, certification support, and a dedicated staff development budget. (We are a \"SHRI 2025 Gold winner\" in \"Learning & Development; Coaching & Mentoring\")


• Career Progression: Structured career pathways that enable you to grow along a technical/domain expert track or a leadership track.


• Competency Framework: A structured and practical framework to support you to develop, perform, and succeed.


• Flexible Work Arrangement: Staff may choose to work flexi-place, fle