Senior Full Stack Engineer

User Experience Researchers Pte Ltd; Singapore; On-site; SGD 140,000 - 190,000; Full time

Job summary

User Experience Researchers Pte Ltd in Singapore is seeking a Senior Consultant to drive the delivery of a large-scale modernization project, spanning frontend to backend, infrastructure and security integration. The role demands hands-on leadership and strategic technical guidance.

You will lead the migration of legacy systems to a cloud-native AWS stack, mentor engineers, and coordinate with product owners and DevSecOps to ensure secure, scalable solutions.

Qualifications

• Senior Consultant with 7+ years of experience and 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.

Responsibilities

• Migrate legacy applications to a modern cloud-native stack.
• Build and configure products end to end, from frontend to backend, infrastructure and security integration.
• Lead delivery across multiple workstreams with product owners, DevSecOps, and stakeholders.
• Define the technical architecture and target state for the modernised platform.
• Mentor team members and set engineering standards.

Skills

ReactJS

TypeScript

Golang

Kotlin

CI/CD

Docker

Kubernetes

AWS

Terraform

Observability

Tools

Next.js

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.