At a Glance
- Tasks: Develop high-impact backend solutions using C# .NET and support frontend with React.
- Company: Join ONYX Insight, a leader in renewable energy technology.
- Benefits: Competitive contract pay, flexible work environment, and opportunity to make a real impact.
- Other info: Dynamic role with opportunities for growth in a fast-paced environment.
- Why this job: Be part of a team revolutionising renewable energy with cutting-edge technology.
- Qualifications: 5+ years in C# .NET, experience with React, and strong communication skills.
The predicted salary is between 50000 - 70000 £ per year.
The Role
Are you a highly skilled full stack contractor looking to make an immediate impact on a modern, high‑visibility platform? At ONYX Insight, we’re looking for a Senior Software Contractor to join our team, with a primary focus on backend delivery using C# .NET, alongside contributing to our React frontend services. This is a hands‑on contract role where you’ll be trusted to hit the ground running, deliver high‑quality code, and contribute to the evolution of our core platforms supporting the renewable energy sector. You’ll work closely with product, design, and engineering teams to build scalable, performant user interfaces, while also supporting backend integrations where needed.
Key Responsibilities
- Deliver High‑Impact Backend Solutions: Own the development of responsive, high‑performance applications using C# .NET (primary focus).
- Full‑Stack Contribution: Support frontend development with React (secondary focus), ensuring seamless integration between frontend and services.
- Build & Ship Quickly: Work in an agile environment to design, develop, and release features efficiently with minimal oversight.
- Collaborate Effectively: Partner with cross‑functional teams to translate requirements into practical, user‑focused solutions.
- Drive Code Quality: Write clean, maintainable, and scalable code, following best practices.
- Support Delivery & DevOps: Contribute to CI/CD pipelines and deployment processes to ensure reliable and consistent releases.
Ideally, you’ll have/be
- Strong commercial experience with C# .NET (5+ years preferred) – this is the core focus of the role.
- Solid experience with modern frontend tooling (state management, component libraries, testing frameworks).
- Working knowledge of React (2+ years) to support frontend services.
- Proven track record delivering software in contract or fast‑paced environments.
- Experience building scalable, performant web applications.
- Familiarity with cloud platforms (AWS preferred).
- Experience with relational databases (PostgreSQL ideal).
- Comfortable working autonomously, managing priorities, and delivering to tight timelines.
- Strong communication skills and a pragmatic, delivery‑focused mindset.
ONYX Insight is a growing technology and engineering organization in the renewable energy sector. Our vision is to build a more efficient future by becoming the world’s most innovative provider of predictive technology solutions. Our advanced sensing, software and analytics combined with our engineering experience are deployed on wind turbines around the world to maximize production and make turbines more reliable for longer, optimizing energy production.
ONYX Insight is part of the Macquarie Group. Macquarie is a global financial services group operating in 34 markets in asset management, leasing and asset financing, market access, commodity trading, renewables development, specialist advisory services, capital raising and principal investment. The diversity of the Macquarie Group operations combined with a strong capital position and robust risk management framework has contributed to a 54‑year record of unbroken profitability.
ONYX Insight are an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.
Senior Backend Engineer (C# .NET) – High-Impact Contract in Nottingham employer: ONYX Insight
At ONYX Insight, we pride ourselves on being an exceptional employer, offering a dynamic work culture that fosters innovation and collaboration in the renewable energy sector. Our team enjoys the benefits of working on high-impact projects with cutting-edge technology, alongside ample opportunities for professional growth and development. Located within the supportive framework of the Macquarie Group, employees can thrive in a diverse environment that values their contributions and encourages a strong work-life balance.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Backend Engineer (C# .NET) – High-Impact Contract in Nottingham
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech industry, especially those who work with C# .NET or in renewable energy. A personal recommendation can make all the difference when you're trying to land that contract.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your best backend projects using C# .NET. Include any relevant frontend work with React too. This will give potential employers a taste of what you can bring to their team.
✨Tip Number 3
Prepare for interviews by brushing up on your technical knowledge and soft skills. Be ready to discuss your experience with CI/CD pipelines and how you've contributed to agile teams in the past. Confidence is key!
✨Tip Number 4
Don't forget to apply through our website! We love seeing candidates who are genuinely interested in joining ONYX Insight. Plus, it makes it easier for us to keep track of your application and get back to you quickly.
We think you need these skills to ace Senior Backend Engineer (C# .NET) – High-Impact Contract in Nottingham
Some tips for your application 🫡
Tailor Your CV:Make sure your CV highlights your experience with C# .NET and any relevant projects. We want to see how your skills align with the role, so don’t be shy about showcasing your achievements!
Craft a Compelling Cover Letter:Your cover letter is your chance to shine! Use it to explain why you’re the perfect fit for this contract role. Share specific examples of your past work that demonstrate your ability to deliver high-impact backend solutions.
Showcase Your Full-Stack Skills:Even though the focus is on backend development, we love seeing candidates who can contribute to frontend work too. Mention your experience with React and how you’ve integrated it with backend services in previous roles.
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for this exciting opportunity at ONYX Insight!
How to prepare for a job interview at ONYX Insight
✨Know Your Tech Stack
Make sure you brush up on your C# .NET skills, as this is the core focus of the role. Be prepared to discuss your past projects and how you've used these technologies to deliver high-impact solutions.
✨Showcase Your Full-Stack Experience
Since the role involves some frontend work with React, be ready to talk about your experience with modern frontend tooling. Highlight any projects where you've successfully integrated backend and frontend services.
✨Demonstrate Agile Mindset
This position requires working in an agile environment, so come prepared to discuss how you've designed, developed, and released features efficiently. Share examples of how you've managed tight timelines and delivered quality code.
✨Communicate Effectively
Strong communication skills are key for collaborating with cross-functional teams. Practice articulating your thoughts clearly and concisely, especially when discussing technical concepts or project requirements.
