Back End Developer

INFOWIZ PTE LTD; Singapore; On-site; SGD 90,000 - 140,000; Full time

Job summary

INFOWIZ PTE LTD in Singapore is seeking an experienced backend engineer to design, develop, and maintain robust services and APIs. You will own features end-to-end, review code, test, and rollout, while optimizing performance, queries, and scalability.

Collaborate with product, frontend, QA, and DevOps, and mentor junior engineers to raise engineering standards. The role emphasizes strong C#/.NET expertise, RESTful design, and reliable data processing in a fast-paced environment.

Qualifications

• Bachelor's degree in CS, SE, or equivalent.
• 3–5 years backend dev experience with production ownership.
• Strong C# and .NET Core/.NET experience.
• RESTful API design and backend system design.
• SQL optimisation and relational databases.
• Ability to write clean, thread-safe code and scale for fault tolerance.
• Experience diagnosing production incidents and fixes.
• Clear cross-team communication.

Responsibilities

• Design, develop, and maintain backend services and APIs.
• Build workflows for configuration, operational controls, data processing, and platform integrations.
• Own technical design and delivery for complex features, including reviews, testing, and rollout.
• Improve service performance, queries, concurrency, and availability.
• Investigate incidents, identify root causes, and implement fixes.
• Collaborate with product, frontend, QA, and DevOps to deliver backend features.
• Mentor junior engineers and raise engineering standards.

Skills

C# / .NET

Backend development

REST APIs

SQL optimisation

Production ownership

Code reviews

Distributed systems

Clear communication

Education

Bachelor's degree in CS/SE

Tools

Docker

Kubernetes

Monitoring tools

Job description

• Design, develop, and maintain backend services and APIs supporting product operations and internal management platforms.
• Build reliable workflows for configuration, operational controls, data processing, and platform integrations.
• Own technical design and delivery for complex features, including code reviews, testing, documentation, and production rollout.
• Improve service performance, database queries, concurrency handling, and availability.
• Investigate production incidents, identify root causes, and implement lasting fixes.
• Work with product, frontend, QA, and DevOps teams to deliver and support backend features.
• Mentor junior engineers and help improve engineering standards and system maintainability.

Required Qualifications and Skills:

• Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience
• At least 3-5 years of hands-on backend development experience, including ownership of production services.
• Strong practical experience with C# and .NET Core / .NET.
• Solid understanding of RESTful API design, HTTP, service integrations, and backend system design.
• Experience with relational databases, including SQL optimisation
• Ability to write clean, maintainable, thread-safe code and design for data consistency, scalability, and fault tolerance.
• Experience diagnosing performance issues and resolving incidents in production systems.
• Clear communication skills and the ability to make technical decisions while working across teams.

Preferred Skills:

• Experience with high-traffic digital platforms or operational systems
• Familiarity with Docker, Kubernetes, microservices, distributed systems, and monitoring tools
• Experience building internal tools, configuration systems, or integrations with external platforms