Senior C#/.NET Developer - Banking API & Cloud (Hybrid)

ARM International; Greater London; Hybrid; GBP 80,000 - 105,000; Part time

Job summary

ARM International in London is seeking experienced Senior C# .NET Developers to join a strategic technology transformation programme within a leading international banking environment.

Design, develop and enhance enterprise-grade applications across front-, middle- and back-office domains. Collaborate with architects, analysts, data engineers and QA to deliver scalable, secure, high-performing solutions in a regulated setting.

Qualifications

• Must have proven experience with senior C#/.NET development in banking or regulated environments.
• Experience delivering enterprise-grade applications across front, middle and back offices.

Responsibilities

• Design, develop and maintain enterprise applications using C# and .NET.
• Develop scalable, secure APIs, services and distributed apps.
• Translate requirements with analysts and stakeholders into technical solutions.
• Contribute to solution architecture, design and code reviews.
• Develop RESTful APIs and integration services.
• Implement monitoring, logging and error handling.
• Work with relational and non-relational databases.
• Develop automated unit, integration and regression tests.
• Support CI/CD and DevOps practices.
• Troubleshoot production issues and perform root-cause analysis.
• Follow engineering, security and development standards.
• Support modernization and cloud adoption.

Skills

.NET Core / .NET 6+

ASP.NET Core / Web API

REST APIs and microservices

SQL Server

Entity Framework / ORM

Object-oriented design

Distributed systems

Unit testing

Azure DevOps

Git and CI/CD

Troubleshooting

Stakeholder communication

Kafka / RabbitMQ / Service Bus

Event-driven architectures

React / Angular

Observability and performance

Tools

Azure DevOps

Job description

ARM International in London is seeking experienced Senior C# .NET Developers to join a strategic technology transformation programme within a leading international banking environment.

Design, develop and enhance enterprise-grade applications across front-, middle- and back-office domains. Collaborate with architects, analysts, data engineers and QA to deliver scalable, secure, high-performing solutions in a regulated setting.