Senior Software Engineer - Kotlin, ReactJS

Senior Software Engineer (Kotlin, ReactJS) - A26440

Activate Interactive Pte Ltd · Singapore, Singapore · Full-time · Posted 2026-11-11

Workplace: on_site

Department: Co-Development

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: A26440

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.

Requirements

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.

Benefits

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, flexi-time, and flexi-load based on existing framework 

Why you'll love working with us? 

If you are looking for opportunities to collaborate with leading industry experts and be surrounded 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. We believe your success is our success. 

Does it sound like something you are interested in exploring further? Please be in touch with our team for an initial chat at [email protected]

Activate Interactive Singapore is an equal opportunity employer. Employment decisions will be based on merit, qualifications and abilities. Activate Interactive Pte Ltd does not discriminate in employment opportunities or practices on the basis of race, colour, religion, gender, sexuality, national origin, age, disability, marital status or any other characteristics protected by law. 

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 Pte Ltd’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. 

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.

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