Senior Software Engineer (.Net

Stratospherec is recruiting a senior software engineer for its client who is an award-winning software company providing financial management systems to primary industry businesses across the UK.

The company based in West Sussex is migrating its established desktop product to a cloud-native SaaS platform so this exciting role combines hands‑on development with responsibility for architectural decisions, technical standards and mentoring, working in a collaborative environment amongst a talented team of developers.

This is a hybrid role with 2 days week in the office which is easilly accessible from the Midhurst, Horsham, Crawley, Arundel, Worthing and Brighton and close to rail networks and other public transport links.

• Lead technical decisions concerning multi-tenancy, data modelling and platform architecture.
• Work with engineering, product and domain specialists to define appropriate solutions.
• Mentor senior engineers and improve design, code review and delivery practices.
• Investigate complex issues across application code, data and infrastructure.
• Develop AI-supported product features and engineering processes.

• Extensive full-stack development using .NET/C#, Type Script and Vue, React or Angular to senior, lead or staff engineer level.
• Previous responsibilty for significant architectural decisions.
• Multi‑tenant SaaS and cloud delivery on Azure, including containers, Kubernetes and CI/CD.
• Strong diagnostic skills and sound technical judgement.
• Some practical experience of AI development tools and LLM-based features, including retrieval, semantic search or agents.
• The ability to guide technical discussions and support colleagues.

The technology stack includes Vue 3, PostgreSQL, Azure Dev Ops and real‑time messaging.

This role offers a salary of 65K-75K alongside full professional development and a performance/profit-related annual bonus, subject to business results. Hybrid working with 2–3 office days per week, birthday leave, Christmas office closure, pension with 5% employer contribution after a qualifying period, private health insurance, enhanced sick pay, death-in-service cover and free parking.