Mobile Application Developer

re-zoo-me; Singapore; Hybrid; SGD 90,000 - 140,000; Full time

Job summary

Helius Technologies, based in Singapore, is seeking a hands-on Mobile Application Developer to join the development team. You will work across mobile, web, backend APIs and databases, tackling end-to-end delivery challenges.

This role requires strong Flutter/Dart and .NET/C#, REST API integration, ReactJS, and cloud-backed development. You will collaborate with Product, UX/UI, QA, and other engineers to ship reliable, scalable applications.

Qualifications

• Proficiency in Flutter/Dart for mobile apps.
• Strong experience with .NET/C# backend development.
• Skilled in REST API development and integration.
• Proficient in ReactJS for web interfaces.

Responsibilities

• Develop and maintain mobile applications using Flutter/Dart.
• Develop web applications using ReactJS.
• Develop and maintain backend services and REST APIs using .NET/C#.
• Work with SQL Server and Oracle, including SQL queries for development and troubleshooting.
• Support system and API integrations and troubleshoot across stack.

Skills

Flutter/Dart

Dotnet/C#

REST APIs

ReactJS

SQL

SQL Server/Oracle

AI-assisted tools

Git

Troubleshooting

Tools

GitHub Copilot

Azure DevOps

Job description

About the job

At Helius Technologies, we help organisations deliver technology outcomes that work in the real world.

Our teams support complex technology initiatives across Asia and the Middle East, particularly in regulated and enterprise environments where reliability, governance, and execution matter.

Our focus is simple: to be a trusted partner in technology transformation - delivering outcomes reliably and built to last.

We are currently looking for a [Mobile Application Developer] to join our team in [Singapore].

In this role, you will work with engineering teams, stakeholders, and delivery leads to support the execution of technology initiatives. The role is suited to professionals who combine strong technical capability with a structured and accountable approach to delivery.

We value individuals who bring depth, accountability, and a strong commitment to quality.

We are looking for a hands-on Full Stack Developer to join the development team.

The developer will work across mobile, web, backend APIs, system integration and databases, and should be comfortable troubleshooting issues across the full application stack.

Key responsibilities

• Develop and maintain mobile applications using Flutter / Dart.
• Develop web applications using ReactJS.
• Develop and maintain backend services and REST APIs using .NET / C#.
• Work with Microsoft SQL Server and Oracle, including writing SQL queries for development and troubleshooting.
• Support system and API integrations.
• Troubleshoot application issues across frontend, backend, integration and database layers.
• Write maintainable, reusable and testable code.
• Participate in code reviews, testing and technical discussions.
• Work closely with Product, UX/UI, QA and other engineering teams.
• Use GitHub Copilot or similar AI-assisted development tools to support development, debugging and productivity.

Must-have skills

• Flutter / Dart
• .NET / C#
• REST API development and integration
• ReactJS
• SQL
• Microsoft SQL Server and/or Oracle
• GitHub Copilot or other AI-assisted development tools
• Git / source control
• Strong troubleshooting and problem-solving skills

Preferred skills

• Azure DevOps / CI/CD
• Experience with both Oracle and Microsoft SQL Server
• Enterprise application integration
• Authentication and authorisation