Senior Software Engineer (Kotlin, ReactJS) - A26423

Activate Interactive Pte Ltd; Singapore; On-site; SGD 120,000 - 180,000; Full time

Benefits offered by this job

Outpatient medical

Specialist medical coverage

Life and health insurance

Learning programmes & budget

Structured career pathways

Flexi-place / flexi-time

Job summary

Activate Interactive Pte Ltd in Singapore is seeking Senior Full Stack Engineers to modernise a Singapore public sector digital service. You will migrate a legacy stack to a cloud-native, containerised AWS platform and build end-to-end frontend to backend, infrastructure, security integration, and production support.

You will work across ReactJS, TypeScript, Next.js on the frontend and Golang and/or Kotlin on the backend, with Terraform, Docker, Kubernetes, CI/CD in GitLab, and observability

Qualifications

• Experience migrating or modernising legacy systems.
• Experience delivering Singapore Government or public sector projects is a plus.
• Frontend: ReactJS, TypeScript; Backend: Golang and/or Kotlin.
• DevOps: CI/CD, Docker, Kubernetes; Cloud: AWS; IaC: Terraform.

Responsibilities

• Migrate legacy applications to a modern cloud-native, containerised stack.
• Build responsive web frontends with ReactJS, TypeScript, Next.js.
• Develop backend services in Golang and/or Kotlin with workflow engines.
• Set up secure AWS infrastructure using Terraform.
• Implement security controls and monitoring; integrate Singpass/Corppass.
• Lead delivery across workstreams and mentor team members.
• Define architecture and guide legacy-to-modern migrations.

Skills

ReactJS

TypeScript

Next.js

Golang

Kotlin

AWS

Terraform

Docker

Kubernetes

CI/CD

GitLab

Observability tools

OWASP/Security integration

Tools

Temporal

Open Policy Agent

Terraform

GitLab CI/CD

Dynatrace

Datadog

AWS services

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.

Co-Development Business Unit is hiring

You will work in Singapore Government Agencies

This is a fixed term contract role. The engagement is 1 year.

Internal Code: A26423

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.

• Outpatient medical
• Specialist medical coverage and generouscustomisableflexi benefits, or flexi allowance
• Life and health insurance
• Thoughtfulperkslike special occasions “red packet” and CNY goodies, etc.
• Support foryour physical, mental, and overall well-being through year-round initiatives.
• Learningprogrammes, certification support, and a dedicated staff development budget.
• We are a “SHRI 2025 Gold winner” in “Learning & Development; Coaching & Mentoring”
• Structured career pathways that enable you to grow along a technical/domain expert track or a leadership track.
• A structured and practical framework to support you to develop, perform, and succeed.
• Staff may choose to work flexi-place, flexi-time, and flexi-load based on existing framework

Whyyou'lllove working with us?

If you are looking for opportunities to collaborate with leading industry experts andbesurrounded by highly motivated and talented peers, we welcome you to join us. We provide all employees with equal opportunities to grow and develop with us. Webelieveyour success is our success.

Activate Interactive Singapore is an equal opportunity employer. Employment decisions will be based on merit,qualificationsand abilities. Activate Interactive Pte Ltd does not discriminate in employment opportunities or practiceson the basis ofrace,colour, religion,gender, sexuality, national origin, age, disability, maritalstatusor any other characteristics protected by law.

Please consult our Privacy Notice (https://www.activate.sg/privacy-policy) to know more about how we collect, use, and transfer the personal data of our candidates. Here you can find how you can request for access, correction and/or withdrawal of your Personal Data.

Protecting your privacy and the security of your data are longstanding top priorities for Activate Interactive Pte Ltd.

Your personal data will be processed for the purposes of managing Activate Interactive PteLtd’s recruitment related activities, which include setting up and conducting interviews and tests for applicants, evaluating and assessing the results, and as is otherwise needed in the recruitment and hiring processes.