Senior C#/.NET Engineer - Enterprise APIs & Cloud

ARM International; England; On-site; GBP 60,000 - 90,000; Full time

Job summary

ARM International is seeking an experienced .NET engineer to design, develop and maintain enterprise applications in the UK. You will build scalable RESTful APIs, work on distributed services and contribute to architecture while collaborating with analysts and business stakeholders.

The role emphasizes secure coding, automated testing and support for DevOps practices within a modern cloud environment. Strong communication with technical and non-technical teams is essential.

Qualifications

• Proven experience delivering enterprise C#/.NET applications.
• Strong background in REST APIs and microservices design.
• Experience with SQL Server and complex queries.
• Proficient in ORM (EF) and unit testing.
• Familiar with distributed systems and enterprise integration.
• Exposure to DevSecOps and secure coding practices.

Responsibilities

• Design, develop and maintain enterprise apps using C#/.NET.
• Develop scalable RESTful APIs and distributed services.
• Collaborate with analysts and stakeholders to translate requirements.
• Contribute to solution architecture, design reviews and code quality.
• Support CI/CD, DevOps practices and production troubleshooting.

Skills

NET Core / .NET 6+

ASP.NET Core / Web API

REST APIs & microservices

SQL Server advanced queries

Entity Framework / ORM

Distributed systems / enterprise integ

Unit testing / automation

CI/CD / Git workflows

Secure coding / DevSecOps

React / Angular

Kafka / RabbitMQ / Service Bus

Event-driven architectures

Troubleshooting / problem-solving

Stakeholder communication

Tools

Azure DevOps

Git

CI/CD tooling

Job description

ARM International is seeking an experienced .NET engineer to design, develop and maintain enterprise applications in the UK. You will build scalable RESTful APIs, work on distributed services and contribute to architecture while collaborating with analysts and business stakeholders.

The role emphasizes secure coding, automated testing and support for DevOps practices within a modern cloud environment. Strong communication with technical and non-technical teams is essential.