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Senior .NET Engineer

Defence Division
Contract/Interim
01782 203040
£400 - £500 per day
London
04/02 - .NET
04-02-2026 05:14 PM
Senior .NET Engineer
6 Month contract initially
Based: Onsite - Coventry/London (max 1-2 days)
£400 - £500 p/d via Umbrella

We have a great opportunity with a world leading organisation where you will be provided with all of the support and development to succeed. A progressive organisation where you can really make a difference. We have a great opportunity for a Senior .NET Engineer on a long term program of work.

Ready for your next big role to own and deliver high quality, secure .NET services that meet business outcomes. You will set the bar for engineering standards, champion secure-by-design practices, mentor teammates, and ensure scope is delivered reliably, on time, and with clear operational ownership.
* To lead team in solving business problems by designing and building services in .NET and resilient messaging (e.g., Kafka/Event Hubs) and API-first data delivery patterns.
* To collaborate with Engineering on CICD pipelines, automation, release processes, and DevSecOps to ensure solutions are reliable and well-instrumented.

Key Responsibilities:
* Translate scope into actionable plans, estimates, and milestones; actively manage risks, dependencies, and non-functional requirements.
* Mentor engineers (pairing, design reviews, coaching), improve team productivity, and cultivate a healthy engineering culture.
* Work closely with Product, QA, and Platform teams to unblock delivery; maintain crisp communication to stakeholders on progress and trade-offs.
* Embed secure coding practices (OWASP Top 10/ASVS), threat modelling, secrets management (e.g., Azure Key Vault), least privilege, and zero-trust principles.
* Implement strong authentication/authorization (OAuth2/OIDC), TLS everywhere, and secure API contracts.
* Partner with InfoSec and Data Governance to evidence controls, handle vulnerabilities, and pass security reviews.
* Align to internal Tech Standards for Information Security, Data Governance, and Regulatory Compliance
* Define, document, and uphold standards for coding, reviews, branching, and versioning (e.g., Trunk based development or GitFlow, mandatory PR reviews, automated quality gates).
* Drive CI/CD excellence (GitHub Actions), including build quality, unit/integration tests, static analysis, and automated deployments.
* Establish and enforce performance, reliability, and maintainability baselines; lead refactoring and modernization where needed.
* Implement comprehensive observability (metrics, distributed tracing-OpenTelemetry) and SLOs for critical services.

Key Skills & Experiences:
* .NET Expertise: .NET 8, C#, ASP.NET Core, RESTful APIs, background jobs, async programming, dependency injection, unit/integration testing frameworks.
* Security Concepts: OWASP Top 10/ASVS, threat modelling, OAuth2/OIDC, TLS, input validation, secrets management, RBAC/ABAC.
* Cloud & DevOps: Azure (App Service/AKS/Functions), IaC (Terraform/Bicep), CI/CD pipelines, containers (Docker), observability (logs/metrics/traces).
* Architecture: DDD, modular monolith/microservices, event-driven patterns, idempotency, resiliency (circuit breakers/retries), API versioning.
* Collaboration: Proven record of mentoring, elevating engineering standards, and delivering scoped outcomes in cross-functional teams.
* Apply unit testing and component testing using tools like Xunit
* Participate in Agile/SCRUM ceremonies including sprint planning, reviews, and retrospectives.

This is an excellent opportunity on a great project of work, If you are looking for your next exciting opportunity, apply now for your CV to reach me directly, we will respond as soon as possible.


LA International is a HMG approved ICT Recruitment and Project Solutions Consultancy, operating globally from the largest single site in the UK as an IT Consultancy or as an Employment Business & Agency depending upon the precise nature of the work, for security cleared jobs or non-clearance vacancies, LA International welcome applications from all sections of the community and from people with diverse experience and backgrounds.

Award Winning LA International, winner of the Recruiter Awards for Excellence, Best IT Recruitment Company, Best Public Sector Recruitment Company and overall Gold Award winner, has now secured the most prestigious business award that any business can receive, The Queens Award for Enterprise: International Trade, for the second consecutive period.

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