Backend Software Engineer (C#)

SAGE GROUP PLC; Newcastle upon Tyne; Hybrid; GBP 40,000 - 55,000; Full time

Job summary

A leading tech company in Newcastle upon Tyne is seeking a Software Engineer to design and enhance Sage products. This hybrid role involves hands-on development and collaboration within a cross-functional team. Ideal candidates will have experience in C#, .NET, MySQL, and Agile methodologies. The company promotes professional growth and offers a comprehensive benefits package including flexible work patterns and various training opportunities.

Benefits

Comprehensive health, dental and vision coverage

Work away scheme for up to 10 weeks a year

On-going training and professional development

Paid 5 days yearly to volunteer

Flexible work patterns and hybrid working

Qualifications

• Proven experience in software development.
• Solid understanding of Agile practices.
• Hands-on experience with SaaS architecture.

Responsibilities

• Design, develop, and maintain core Sage software products.
• Implement features and fix defects.
• Participate in code reviews and enhance documentation.

Skills

Building and maintaining high-quality software solutions

C# programming

Agile methodologies (Scrum, XP)

MySQL

Troubleshooting and diagnosing defects

Cross-functional collaboration

Documentation and attention to detail

Tools

AWS

.NET Framework

CI/CD pipelines

Job description

We’re looking for a Software Engineer to help design, build, and enhance the next generation of Sage products. You’ll contribute to high-quality, scalable solutions that support Sage’s long-term strategy and delight our customers. This role blends hands‑on development, collaboration across cross‑functional teams, and continuous improvement. You’ll be joining a team that values engineering excellence, craftsmanship, and shared knowledge. This role offers the opportunity to contribute to core backend services that support our cloud‑based products. You’ll work within a collaborative engineering team, building scalable APIs and enhancing platform capabilities. You’ll gain exposure to domain knowledge, modern tooling like GitHub Copilot, and cross‑team collaboration, while continuously developing your technical skills. This is a hybrid role requiring 3 days per week in our Newcastle office.

Your First 90 Days

• 30 days - Learn the product ecosystem, architecture, tooling, and team workflows.
• 60 days - Contribute to feature development, bug resolution, and code reviews.
• 90 days - Own development tasks end‑to‑end and actively support team delivery, quality standards, and technical improvements.

Meet the Team

You’ll join a collaborative engineering team working closely with Product Management, QA/XD, and other product lines across Sage. The team thrives on shared ownership, agile practices, and empowering one another to deliver meaningful outcomes for our customers.

How Success Will Be Measured

• Quality and reliability of the software you deliver.
• Contribution to peer reviews, testing, and continuous improvement.
• Ability to collaborate effectively across disciplines.
• Responsiveness and ownership in resolving defects and supporting releases.
• Contribution to knowledge sharing, documentation, and team growth.

Skills You’ll Gain

• End‑to‑end delivery experience across the full software development lifecycle.
• Exposure to modern Agile methodologies (Scrum, XP, iterative delivery).
• Hands‑on experience with scalable SaaS architecture and cloud tooling.
• Skills in debugging, performance optimisation, and high‑quality code design.
• Cross‑functional collaboration with design, product, and QA teams.

Key Responsibilities Snapshot of Your Day‑to‑Day

You’ll design, develop, and maintain software that supports core Sage products. This includes implementing features, fixing defects, participating in code reviews, refining estimates, enhancing technical documentation, and supporting production systems when needed. You’ll work closely with cross‑functional partners and continuously look for opportunities to improve code quality, performance, and user experience.

• Proven experience building and maintaining high‑quality software solutions.
• Experience with SaaS or cloud‑based systems and modern development tooling.
• Solid understanding of Agile practices such as Scrum, XP, or iterative development.
• Ability to troubleshoot, diagnose, and resolve defects across environments.
• Willingness to collaborate, participate in code reviews, and support team delivery.
• Good documentation habits and attention to detail.
• Ability to provide 3rd‑tier support for your area when needed.
• Solid hands‑on experience with C#, .NET Framework, and MySQL.
• Understanding of microservices and RESTful APIs.
• Basic understanding of event‑driven architecture.
• Experience working in an Agile/Scrum environment.
• Good problem‑solving skills and ability to work collaboratively in a team.

Nice to Have

• Exposure to AWS or other cloud platforms.
• Familiarity with BDD or automated testing frameworks.
• Understanding of CI/CD pipelines.

Advert

Working at Sage means you’re supporting millions of small and medium sized businesses globally with technology to work faster and smarter. We leverage the future of AI, meaning business owners spend less time doing routine tasks, like entering invoices and generating reports, and more time pursuing their ambitions.

At Sage, we offer you an environment where you can grow professionally without compromising your personal well‑being. Our benefits package is designed to provide stability, flexibility, and balance.

Benefits

Benefits video - https://youtu.be/TCMtTYUUiuU

• Comprehensive health, dental and vision coverage.
• Work away scheme for up to 10 weeks a year.
• On‑going training and professional development.
• Paid 5 days yearly to volunteer through our Sage Foundation.
• Flexible work patterns and hybrid working.