Software Engineer, Platform (C#)

Location: Hybrid, Newcastle or Remote (UK Based)
Reports to: Engineering Manager
Type: Full-time

Join Oak Engage – Where Communication Meets Connection

At Oak Engage, we’re on an exciting growth journey—backed by a major investment from NorthEdge to scale our impact and redefine the future of employee engagement. Trusted by some of the UK’s biggest brands, including Aldi, Five Guys, and ITV, we help organisations connect, engage, and empower their people through smarter, more personalised internal communication. With our next stage of expansion underway, we’re building a team of bold, ambitious thinkers ready to make their mark at a high-growth, purpose-driven SaaS company. If you’re looking to shape the future of work and grow alongside a company that’s going places, now’s the time to join Oak.

About the Role

We’re looking for a skilled Back-End Engineer with strong C#/.NET experience to join our growing development team and help develop the services that power Oak’s platform. You’ll be responsible for building and maintaining the underlying systems that drive our core functionality, working with a modern tech stack and helping shape the future of our product architecture.

This is an ideal role for someone who enjoys solving technical challenges, designing performant scalable, secure systems, and working in a fast-moving SaaS environment.

What You’ll Do

• Design, build, and maintain scalable and secure APIs and backend services using C# and .NET
• Collaborate with front-end engineers and product teams to deliver seamless features
• Optimise database queries and application performance
• Contribute to architectural planning and system design
• Implement unit tests and support automated deployment pipelines
• Maintain code quality and documentation across projects, participate in code reviews

Requirements

What We’re Looking For

• 3+ years of back-end development experience using C# and .NET Core/.NET 6+
• Strong knowledge of SQL and/or NoSQL databases
• Experience building REST APIs and microservices
• Solid understanding of software design principles, scalability, and performance
• Familiarity with CI/CD, Docker, "Familiarity with CI/CD pipelines, Docker and cloud infrastructure - Azure is an advantage"
  
  

Benefits

Why Join Oak?

• A meaningful role in a mission-led SaaS company with strong growth and product-market fit
• The chance to work with household brands and solve real-world enterprise challenges
• Flexible hybrid or remote working options
• Private health insurance, life insurance, and Employee Assistance Programme (EAP)
• Gym contribution and travel allowance
• Enhanced maternity, paternity, and discretionary leave
• Generous holiday policy (25 days + Bank Holidays + additional discretionary days)
• Regular team socials and a positive, collaborative culture

Our Recruitment Process 

Hiring Manager Interview

• Deep dive into architecture, problem-solving, and team contributions
• Assess communication and curiosity

Technical Task or Live Pairing

• Realistic, time-bound task or live coding session
• Use structured rubric for fairness (avoid freeform “whiteboarding”)
• "Focus on team collaboration, code quality, and feedback" 

Peer Technical Panel/Culture Fit / CTO Chat - In person at our NCL HQ

• Includes cross-functional devs, product manager or designer
• Assess long-term growth potential and alignment with tech principles
• Opportunity for candidate to ask strategic questions

Equality & Diversity at Oak

At Oak, we’re committed to building a diverse and inclusive workplace where everyone feels welcome, supported, and able to thrive.

We believe that different perspectives make us stronger, and we actively encourage applications from people of all backgrounds, experiences, and identities — including, but not limited to, race, ethnicity, gender, age, disability, sexual orientation, and socio-economic status.

We are an equal opportunities employer. All hiring decisions are based on business needs, role requirements, and individual qualifications — without bias or discrimination.

If you require any adjustments to the interview process or the role itself to support accessibility, please let us know — we’re happy to help.