Senior Full Stack Engineer

User Experience Researchers Pte Ltd; Singapore; On-site; SGD 120,000 - 160,000; Full time

Job summary

User Experience Researchers Pte Ltd is seeking Senior Consultants to lead the transformation of public sector digital services. You will migrate legacy systems to a modern cloud-native platform on AWS, building frontend to backend, infrastructure, security integration, and production support.

You will guide multiple workstreams, set engineering standards, and mentor engineers while coordinating with product owners and DevSecOps.

Qualifications

• Senior Consultant with 7+ years of experience, including 2-3 years leading delivery or defining solution architecture.
• Experience migrating or modernising legacy systems is strongly preferred.
• Experience delivering large-scale enterprise or public sector projects is an advantage.

Responsibilities

• Develop and configure products, migrating legacy applications to a modern cloud-native, containerised tech stack.
• Build responsive web frontends using ReactJS and TypeScript.
• Develop backend services and APIs in Golang and/or Kotlin.
• Set up and maintain secure AWS infrastructure with Infrastructure as Code (Terraform).
• Implement security controls and monitoring, including OIDC and SAML integration.
• Build and maintain CI/CD pipelines in GitLab; deploy workloads to Kubernetes (EKS).
• Instrument apps for observability with Dynatrace or Datadog.
• Support production deployments, troubleshoot issues, and participate in incident resolution.
• Write clean, tested, well-documented code and participate in code reviews.
• Define the technical architecture and target state for the modernised platform.
• Lead delivery across multiple workstreams with stakeholders.
• Provide strategic technical guidance and mentor team members.
• Plan legacy-to-modern migration approaches, including sequencing, risk management, and cutover.

Skills

ReactJS

TypeScript

Golang

Kotlin

CI/CD

Observability

Tools

ReactJS

TypeScript

Next.js

Golang

Kotlin

AWS

Terraform

Docker

Kubernetes

Temporal

Open Policy Agent

Dynatrace

Datadog

OIDC

SAML

RBAC

ABAC

Job description

We are looking for Full Stack Engineers to modernise a 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.

Key Responsibilities

• 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 enterprise identity platforms, 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.
• Write clean, tested, well-documented code and take part in code reviews.
• Define the technical architecture and target state for the modernised platform.
• Lead delivery across multiple workstreams, coordinating with product owners, DevSecOps, and relevant stakeholders.
• Provide strategic technical guidance, set engineering standards, and mentor team members.
• Plan legacy-to-modern migration approaches, including sequencing, risk management, and cutover.

Requirements:

Experience

• Senior Consultant: 7+ years of experience, including at least 2-3 years leading technical delivery or defining solution architecture.
• Experience migrating or modernising legacy systems is strongly preferred.
• Experience delivering large-scale enterprise or public sector projects is an advantage.

Technical Skills (Must Have)

• 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

Technical Skills (Good to Have)

• 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
• Experience with enterprise identity and security tools, directory services, access management, and endpoint security solutions
• Infrastructure and container security practices
• OutSystems, Oracle Policy Automation (OPA) / Oracle Intelligent Advisor (OIA), Sitefinity, Oracle technologies

Soft Skills

• 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.