Senior C#/.NET Engineer — Backend, APIs & Azure

BrickRed Systems LLC; Reading; On-site; GBP 90,000 - 130,000; Full time

Job summary

BrickRed Systems LLC is seeking an experienced Senior Software Engineer in Reading, UK, to design, develop and deliver enterprise-grade software using C# and .NET. You will own complex tasks, contribute to technical design decisions, and mentor junior developers as part of cross-functional teams.

The role requires strong fundamentals, experience building scalable applications, and exposure to Microsoft Azure environments, with collaboration across architects, product owners and testers in an

Qualifications

• 6–10 years of hands-on software development experience.
• Strong proficiency in C# and .NET / .NET Core.
• Experience developing REST APIs, backend services, and web applications.
• Good understanding of application architecture and design patterns.
• Strong experience with SQL Server and database development.
• Experience with Git and version control systems.
• Understanding of application security, performance optimisation, and debugging.
• Basic to working knowledge of Microsoft Azure.
• Experience working in Agile/Scrum development environments.
• Strong problem-solving, communication, and collaboration skills.
• Experience designing and developing enterprise-scale applications.
• Exposure to CI/CD pipelines and DevOps practices.
• Experience with automated unit testing and test-driven development.
• Familiarity with cloud-based application deployments.
• Experience mentoring developers and contributing to technical standards.

Responsibilities

• Design, develop, and maintain enterprise applications using C# and .NET / .NET Core.
• Develop scalable, reliable, and maintainable backend services and REST APIs.
• Contribute to application architecture, technical design, and solution implementation.
• Write clean, efficient, and secure code following established engineering standards.
• Perform code reviews and ensure adherence to development best practices.
• Troubleshoot complex technical issues and drive effective resolutions.
• Work with SQL Server and optimise database queries and application performance.
• Collaborate with architects, business analysts, testers, and other development teams.
• Mentor junior developers and provide technical guidance to the engineering team.
• Participate in Agile ceremonies, sprint planning, and delivery activities.
• Support application deployment, release management, and production fixes.

Skills

C# & .NET

OOP fundamentals

REST APIs

App architecture

SQL Server

Git

Security

Azure

Agile/Scrum

Communication

Enterprise apps

CI/CD

DevOps

TDD

Cloud deployments

Mentoring

Job description

BrickRed Systems LLC is seeking an experienced Senior Software Engineer in Reading, UK, to design, develop and deliver enterprise-grade software using C# and .NET. You will own complex tasks, contribute to technical design decisions, and mentor junior developers as part of cross-functional teams.

The role requires strong fundamentals, experience building scalable applications, and exposure to Microsoft Azure environments, with collaboration across architects, product owners and testers in an