Senior API Software Engineer

SG Consulting Limited; Auckland; On-site; NZD 120,000 - 170,000; Full time

Job summary

SG Consulting Limited in Auckland, New Zealand, seeks a Senior API Software Engineer to design, develop and support enterprise-scale APIs, microservices and domain services in a banking environment. You will work hands-on with .NET 8, C#, REST, cloud-native deployments and API gateway integrations.

The ideal candidate has 7-10 years of software development experience, with at least 4 years in API engineering and banking domain exposure. Strong collaboration with DevOps and SRE teams is essential.

Qualifications

• 7-10 years of software development experience
• Minimum 4 years of hands-on API engineering experience
• Banking or financial services domain experience is mandatory
• Experience developing and supporting enterprise-scale applications
• Excellent communication and stakeholder collaboration skills
• Must hold valid New Zealand working rights

Responsibilities

• Design, develop and maintain enterprise-grade APIs using .NET 8, C# and ASP.NET Core.
• Build reusable microservices and domain-driven services.
• Define and maintain API contracts and Swagger/OpenAPI specifications.
• Implement API security controls and gateway integrations.
• Integrate APIs with Kong Gateway.
• Deploy and support microservices running on Azure Kubernetes Service (AKS).
• Optimise API performance, scalability, reliability and availability.
• Participate in architecture discussions, design reviews and peer code reviews.
• Support production incidents, troubleshooting and root cause analysis.
• Collaborate with DevOps and SRE teams on CI/CD pipelines and deployments.
• Mentor junior developers and promote engineering best practices.

Skills

NET 8

C#

ASP.NET Core

REST API

Microservices

API design

Unit testing

SQL/NoSQL

Security

Tools

AKS

Kong Gateway

Swagger/OpenAPI

GitHub Enterprise

Job description

Role Purpose

Position: Senior API Software Engineer

Technology: .NET 8, C#, ASP.NET Core, Azure AKS, Kong Gateway

Experience: 7-10 years overall, with 4+ years in API engineering

Location: Auckland, New Zealand

Work Rights: Valid New Zealand working rights required

Role Purpose

We are seeking an experienced Senior API Software Engineer to design, develop, optimise and support enterprise-scale APIs, microservices and domain services within a banking environment.

The successful candidate will have strong hands-on experience with .NET 8, C#, REST API development, cloud-native deployments and API gateway integrations.

Key Responsibilities

• Design, develop and maintain enterprise-grade APIs using .NET 8, C# and ASP.NET Core.
• Build reusable microservices and domain-driven services.
• Define and maintain API contracts and Swagger/OpenAPI specifications.
• Implement API security controls and gateway integrations.
• Integrate APIs with Kong Gateway.
• Deploy and support microservices running on Azure Kubernetes Service (AKS).
• Optimise API performance, scalability, reliability and availability.
• Participate in architecture discussions, design reviews and peer code reviews.
• Support production incidents, troubleshooting and root cause analysis.
• Collaborate with DevOps and SRE teams on CI/CD pipelines and deployments.
• Mentor junior developers and promote engineering best practices.

Required Technical Skills

• Strong experience with .NET 8 or later.
• C# and ASP.NET Core.
• REST API development and microservices architecture.
• Swagger / OpenAPI specifications.
• Azure Kubernetes Service (AKS).
• Kong API Gateway integration.
• GitHub Enterprise.
• Unit testing and integration testing.
• SQL and NoSQL databases.
• API security, performance optimisation and scalability.

Experience & Eligibility

• 7-10 years of software development experience.
• Minimum 4 years of hands-on API engineering experience.
• Banking or financial services domain experience is mandatory.
• Experience developing and supporting enterprise-scale applications.
• Excellent communication and stakeholder collaboration skills.
• Must hold valid New Zealand working rights.