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Full Stack Developer – .NET / Azure
Eastleigh (3 days onsite / 2 days WFH)
£55,000 – £65,000 + 15% bonus + benefits
My client, a rapidly growing leader in the water treatment and utilities technology sector, is seeking an experienced Backend Focused Full Stack Developer to join their expanding engineering team. This is an exciting opportunity to work on a greenfield enterprise platform, building the next generation of IoT/telemetry monitoring solutions used across water treatment, pump systems, and utility environments.
The business has grown significantly over the last 18 months and plans to scale by a further 30% next year. As a Backend Focused Full Stack Developer, you’ll be a key contributor in designing and delivering the company’s new customer portal, backend APIs, and integrations with real-time IoT infrastructure.
The Role
You will design, build, and maintain secure, scalable software across both backend (.NET) and frontend (React) ecosystems, **my client is willing to train you up on the Front End requirement** You will be working closely with product, engineering, and operations teams. You’ll help shape best practices, support junior developers, and ensure the delivery of robust cloud-native solutions.
Technical Environment
Backend (primary focus)
* .NET 8
* Mix of .NET Core and .NET Framework (approx. 50/50)
* Building APIs powering the IoT device fleet and customer portal
* RESTful API design (GraphQL beneficial, not essential)
Cloud
* Azure preferred (App Services, Storage, IoT Hub, Event Hub, Data Explorer)
* Open to AWS or GCP candidates with strong cloud integration experience
* Must understand cloud deployments, monitoring, and API integration
* CI/CD pipeline setup and maintenance
* Monitoring, observability, automated deployments
Security
* Experience deploying secure code on enterprise applications.
* Authentication/authorisation (OAuth2, Entra ID/B2C)
* Role-based access control (RBAC)
Desirable skills
* Frontend languages such as ReactJS, Angular, Node, Typescript etc.
* React Native experience is a plus
Key Responsibilities
* Design, develop, and deploy full stack web applications using .NET and React.
* Build and maintain backend APIs to support internal systems, IoT telemetry, and customer-facing applications.
* Develop new features for the customer portal including dashboards, mapping, device status, alerts, and access control.
* Integrate cloud resources and ensure scalable, secure deployments.
* Contribute to CI/CD pipeline development and best practices.
* Support the engineering team through code reviews, mentoring, and technical guidance.
* Collaborate with technical and non-technical stakeholders across the business.
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