Full Stack Engineer

About ClearWatt

ClearWatt is on a mission to make electric vehicle ownership transparent and accessible. Our platform combines real-world data, telematics, and proprietary analytics to deliver trusted insights into EV battery health, real-world range, and performance. We partner with car dealers, leasing companies, energy companies and consumers to help them understand the true condition of electric vehicles - unlocking confidence across the EV ecosystem.

We’re scaling rapidly, building the UK’s most comprehensive EV data intelligence platform - spanning OBD diagnostics, API-based vehicle integrations, and real-time energy data streams.

The Role

We’re looking for a skilled  Backend Developer with strong experience in  C# and the .NET ecosystem to help us scale and evolve our core data and API infrastructure.

You’ll play a central role in designing, building, and optimising services that power our EV testing, reporting, and data-sharing products. This role is primarily backend-focused, but familiarity with modern frontend frameworks (React/React Native/Next.js) is a bonus.

Key Responsibilities

• Develop and maintain robust, high-performance  .NET 8+APIs and services.
• Work with  Azure Functions ,  Blob Storage ,  Queues , and  SQL/NoSQL databases to build scalable, event-driven systems.
• Design and optimise APIs that serve our mobile and web products, including partner integrations.
• Implement efficient RAG AI backend systems for introducing advanced LLM based features
• Collaborate with product managers, data engineers, and frontend developers to deliver new features end to end.
• Write clean, maintainable, and well-tested code, following modern CI/CD practices (GitHub Actions).
• Contribute to architecture discussions around performance, scalability, and data integrity.
• Help evolve our internal tools and services to support ClearWatt’s growing product suite.

What We’re Looking For

• 2+ years of professional experience with  C# and .NET Core .
• Experience building REST APIs or microservices at scale.
• Familiarity with cloud-native design and  Azure services .
• Understanding of async programming, dependency injection, and distributed systems.
• Strong grasp of database design and query optimisation (SQL and/or NoSQL).
• Comfortable working in a small, fast-paced team where you’ll have end-to-end ownership.
• Passion for clean architecture, performance, and testable code.
• Interest in the EV, sustainability, or data analytics space is a plus.

Nice to Have

• Experience with  React / Next.js / React Native or  TypeScript .
• Experience integrating third-party APIs (OEM, OBD, or telematics data).
• Familiarity with data pipelines and event-driven design.
• Understanding of CI/CD automation and GitHub Actions workflows.

What We Offer

• Competitive salary and equity options.
• Hybrid working (London-based team with flexible hours).
• Work directly with founders and management on industry-defining technology.
• Opportunity to shape the architecture of a platform at the forefront of EV intelligence.
• A culture of autonomy, purpose, and impact - your work will be shipped, seen, and used.