Salary: £75,000 – 80,000 per year
Requirements:
- Strong experience with C# and .NET, including migration to modern .NET Core/.NET versions, and building systems such as web APIs and background services using technologies such as HTTP, JSON, XML and message brokers.
- Proficiency in SQL Server (T-SQL) and PostgreSQL – schema design, stored procedures, performance optimization.
- Familiarity with cloud-based development and deployment, ideally in AWS (EC2, RDS, Lambda, S3, etc.).
- Experience with CI/CD pipelines and automated deployments using TeamCity and Octopus Deploy (or equivalent services).
- Version control expertise with GitHub (branching strategies, pull requests, code reviews).
- Ability to develop integration and unit tests with tools such as xUnit, and knowledge of when to use either type of test.
- Good understanding of software design principles (SOLID, clean architecture, layered design).
- Proven ability to work with legacy systems and progressively modernize them.
- Knowledge of containerization (Docker, ECS, or Kubernetes in AWS) – desirable.
- Familiarity with microservices and event-driven architectures – desirable.
- Experience with monitoring and logging solutions (e.g., CloudWatch, ELK stack, Grafana) – desirable.
- Exposure to Agile methodologies and DevOps practices – desirable.
- Comfortable working with both legacy and modern technologies.
- Good written and verbal skills with the ability to clearly document and explain business processes and solution designs.
- Able to work well in a small team either with peers or mentoring less experienced colleagues.
- Proactive in identifying improvements to codebases, processes, and systems.
- Detail-oriented with a focus on writing reliable and maintainable software.
Responsibilities:
- Upgrade, refactor, and modernize legacy .NET applications, web APIs and services to supported frameworks (.NET 6/8/10).
- Analyse existing codebases to identify risks, dependencies, and opportunities for improvement.
- Collaborate with stakeholders to understand business needs and translate them into technical solutions.
- Work with both SQL Server (MSSQL) and PostgreSQL databases, ensuring data integrity and performance tuning.
- Integrate with and deploy to AWS cloud services, leveraging best practices in scalability, security, and reliability.
- Use GitHub for version control and collaborative development workflows (PRs, code reviews).
- Build, release, and deploy applications via TeamCity and Octopus Deploy.
- Write clean, maintainable, and well-documented code with appropriate unit or integration tests, in a test-driven manner where appropriate.
- Maintain and enhance our monitoring and alerting systems to ensure rapid response to production incidents.
- Provide ongoing support and troubleshooting for applications, ensuring minimal downtime and performance issues.
Technologies:
- AWS
- Lambda
- C#
- CI/CD
- Cloud
- CloudWatch
- DevOps
- Docker
- EC2
- ELK
- GitHub
- Grafana
- HTTP
- Support
- JSON
- Kubernetes
- LESS
- PostgreSQL
- SQL
- Security
- Teamcity
- Web
- XML
- microservices
- ASP.NET
More:
We are seeking a skilled .NET engineer to modernize and support our portfolio of legacy applications and services. Many of our existing systems are built on older, unsupported .NET versions, and you will play a key role in refactoring and/or re-architecting and future-proofing them for long-term stability. This is a hands-on role that requires strong problem-solving skills, a solid understanding of enterprise application design, and experience working across the full development lifecycle. Working alongside colleagues in both the UK and India, you will be part of a team that collaborates closely with the commercial side of the business. If you enjoy building systems using the .NET platform, with a focus on delivering quality software whilst continuing to learn and improve with colleagues, then this is an excellent opportunity to further your career. The salary range for this position is £75,000 – £80,000 per year.
last updated 40 week of 2026
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