Senior Software Engineer

Senior .NET Engineer role building cloud-native microservices with full lifecycle ownership Your new company
You'll be joininga modern, product-led engineering environment built around smallcross-functional squads. Each squad typically consists of backend, frontend,mobile, and platform engineers, working together to own services end-to-end.The organisation operates with strong DevOps practices, mature CI/CD pipelines,and high expectations around reliability, risk, and system availability withina regulated environment.

Your new role
As a Senior .NETEngineer, you will design, build, and maintain scalable .NET Core microservicesthat power high-availability, mission-critical systems. You'll contribute toarchitectural decisions, API design, distributed systems patterns, and securecoding practices. You will support CI/CD automation, automated testing,production monitoring, on-call rotations, and continuous delivery. The roleincludes operating confidently in cloud environments such as AWS or Kubernetes,integrating backend services with modern cloud platforms, and contributing totechnical leadership and engineering best practices within your squad.

What you'll need to succeed

Expert-level experience with C#, .NET Core, ASP.NET Core

Proven experience building RESTful APIs, microservices, and event-driven systems

Strong understanding of: asynchronous programming, dependency injection, SOLID, clean architecture, domain-driven design, and secure coding practices

Experience with automated testing frameworks such as xUnit, NUnit, MSTest

Familiarity with observability tools like OpenTelemetry, CloudWatch, AppDynamics, Grafana, Splunk

Hands-on experience deploying services to AWS or Kubernetes

Understanding of distributed systems patterns (circuit breakers, retries, messaging)

Exposure to event-streaming or messaging tools such as Kafka, SNS/SQS, Service Bus

Strong CI/CD experience, ideally with GitHub Actions , or tools like TeamCity/Jenkins

Belief in shift-left testing, automation, infrastructure-as-code (Terraform advantageous), and modern DevOps practices

Experience owning production services end-to-end, including on-call participation

Strong communication skills and ability to work with Product, Design, Risk, and Compliance

Comfortable operating in ambiguous environments and making senior engineering decisions

What you'll get in return
You will join asquad-based engineering environment where you own the full lifecycle of thesystems you build-from design through to deployment, monitoring, and on-call.You'll work with modern .NET, cloud-native architectures, mature DevOpstooling, and high-scale distributed systems. You'll have the opportunity toinfluence architecture, uplift engineering practices, and contribute to ahigh-performance delivery culture. The role offers strong career developmentfor experienced engineers who enjoy autonomy, ownership, and technical depth.

What you need to do now
If you'reinterested in this role, click 'apply now' to forward an up-to-date copy of your CV, or contact Grant White via email at [email protected] .If this job isn't quite right for you, but you are looking for a new position,please contact us for a confidential discussion about your career.
At Hays, we valuediversity and are passionate about placing people in a role where they canflourish and succeed. We actively encourage people from diverse backgrounds toapply.
If you'reinterested in this role, click 'apply now' to forward an up-to-date copy ofyour CV, or call us now.
If this job isn'tquite right for you, but you are looking for a new position, please contact usfor a confidential discussion on your career.
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