Software Engineer, Platform (C#)

Location: Hybrid, Newcastle or Remote (UK Based)Reports to: Engineering ManagerType: Full-timeJoin Oak Engage - Where Communication Meets ConnectionAt 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 RoleWe'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 DoDesign, build, and maintain scalable and secure APIs and backend services using C# and .

NETCollaborate with front-end engineers and product teams to deliver seamless featuresOptimise database queries and application performanceContribute to architectural planning and system designImplement unit tests and support automated deployment pipelinesMaintain code quality and documentation across projects, participate in code reviewsRequirementsWhat We're Looking For3+ years of back-end development experience using C# and . NET Core/.

NET 6+Strong knowledge of SQL and/or NoSQL databasesExperience building REST APIs and microservicesSolid understanding of software design principles, scalability, and performanceFamiliarity with CI/CD, Docker, "Familiarity with CI/CD pipelines, Docker and cloud infrastructure - Azure is an advantage"BenefitsWhy Join Oak?A meaningful role in a mission-led SaaS company with strong growth and product-market fitThe chance to work with household brands and solve real-world enterprise challengesFlexible hybrid or remote working optionsPrivate health insurance, life insurance, and Employee Assistance Programme (EAP)Gym contribution and travel allowanceEnhanced maternity, paternity, and discretionary leaveGenerous holiday policy (25 days + Bank Holidays + additional discretionary days)Regular team socials and a positive, collaborative cultureOur Recruitment Process Hiring Manager InterviewDeep dive into architecture, problem-solving, and team contributionsAssess communication and curiosityTechnical Task or Live PairingRealistic, time-bound task or live coding sessionUse 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 HQIncludes cross-functional devs, product manager or designerAssess long-term growth potential and alignment with tech principlesOpportunity for candidate to ask strategic questionsEquality & Diversity at OakAt 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.