Mobile Application Developer – Full Stack (Flutter, .NET, React)

About the role

Helius Technologies is seeking a Mobile Application Developer to join its Singapore team. The role involves working across mobile, web and backend layers to deliver reliable, enterprise‑grade solutions for regulated environments.

Key responsibilities

• Design, develop and maintain mobile applications using Flutter and Dart.
• Build web applications with ReactJS.
• Create and support backend services and REST APIs using .NET/C#.
• Write and optimise SQL queries for Microsoft SQL Server and Oracle databases.
• Integrate systems and APIs, and troubleshoot issues across the full stack.
• Produce clean, reusable, testable code and participate in code reviews.
• Collaborate with product, UX/UI, QA and other engineering teams.
• Leverage AI‑assisted tools such as GitHub Copilot to enhance development efficiency.

Required profile

• Strong technical capability with a structured, accountable delivery approach.
• Hands‑on experience developing mobile, web and backend components.
• Ability to troubleshoot across frontend, backend, integration and database layers.

Required skills

• Flutter & Dart
• .NET & C#
• REST API development and integration
• ReactJS
• SQL
• Microsoft SQL Server and/or Oracle
• Git and source‑control workflows
• GitHub Copilot or similar AI‑assisted development tools