Design and build scalable applications using .NET / C# / ASP.NET Core. Lead architecture decisions across microservices and distributed systems. Collaborate with US-based product, DevOps, and engineering teams.
Key Highlights
Key Responsibilities
Technical Skills Required
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Job Description
Senior .NET Software Engineer
Fully Remote – Ireland ¦¦ Contract ¦¦ Rate: €500 - €550 per day DOE ¦¦ 12 Month Contract (Extension Likely)
Architect, build, and scale software used by global users - while working remotely from Ireland.
TechHeads is currently seeking a Senior .NET Software Engineer to join one of our high-growth US clients. This is an opportunity to take ownership of complex systems, influence architecture, and work directly with US-based engineering leadership.
As a Senior .NET Engineer, you’ll play a key role in designing and delivering scalable, high-performance applications. You’ll work in a modern cloud-first environment, collaborating with distributed teams across the US and Ireland.
Responsibilities
- Design and build scalable applications using .NET / C# / ASP.NET Core
- Lead architecture decisions across microservices and distributed systems
- Develop and maintain high-quality RESTful APIs
- Collaborate with US-based product, DevOps, and engineering teams
- Mentor junior and mid-level engineers
- Drive best practices in coding, testing, and deployment
- Contribute to performance optimisation and system reliability
- Participate in agile ceremonies and technical planning
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You’ll typically be working with:
- Backend: .NET 6/7+, C#, ASP.NET Core
- Cloud: Microsoft Azure (or AWS depending on client)
- Architecture: Microservices, event-driven systems
- Databases: SQL Server, PostgreSQL
- DevOps: Docker, Kubernetes, CI/CD pipelines
- Tools: Git, Azure DevOps, Jira
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Requirements:
- 6+ years’ experience in .NET development
- Strong experience with ASP.NET Core and API design
- Proven experience designing scalable, maintainable systems
- Solid understanding of software architecture patterns
- Experience working in cloud environments (Azure preferred)
- Strong communication skills—comfortable working with US teams
- Experience mentoring or leading developers
Desirable:
- Experience with distributed systems or high-scale platforms
- Exposure to frontend frameworks (React/Angular)
- DevOps mindset (CI/CD, infrastructure awareness)
- Experience in fast-paced product environments
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