Senior .NET Backend Engineer: Microservices & Card APIs

re-zoo-me; Singapore; Hybrid; SGD 70,000 - 110,000; Full time

Job summary

re-zoo-me is seeking experienced .NET Developers to design and scale high-concurrency backend services, focusing on membership systems and card transaction processing. You will build microservices with ASP.NET Core and ensure robust integration with infrastructure and external vendors.

You will collaborate with product, infrastructure, and external partners, write clean, well-tested code, and help drive performance, reliability, and CI/CD practices in a cloud environment.

Qualifications

• Strong proficiency in C# / .NET Core / ASP.NET Core.
• Basic understanding or exposure to AI / automation technologies (e.g., APIs, workflow automation, or AI-driven solutions).
• Strong problem-solving skills with the ability to troubleshoot complex technical issues.
• Good communication skills and ability to work effectively with cross-functional teams.
• Experience with microservices architecture is an added advantage.

Responsibilities

• Design and develop microservices using ASP.NET Core / .NET Core
• Build and maintain backend services for membership profiles and card transaction systems
• Develop and integrate Card APIs and core membership engine functionalities
• Ensure system performance, scalability, and reliability in high-traffic environments
• Collaborate with cross-functional teams including product, infrastructure, and external vendors
• Write clean, maintainable, and well-tested code

Skills

C# / .NET Core / ASP.NET Core

AI / automation exposure

problem solving

communication

microservices architecture

Tools

Azure Cloud

CI/CD

API integrations

Job description

re-zoo-me is seeking experienced .NET Developers to design and scale high-concurrency backend services, focusing on membership systems and card transaction processing. You will build microservices with ASP.NET Core and ensure robust integration with infrastructure and external vendors.

You will collaborate with product, infrastructure, and external partners, write clean, well-tested code, and help drive performance, reliability, and CI/CD practices in a cloud environment.