Senior Software Developer

ONYX Insight; Nottingham; On-site; GBP 55,000 - 75,000; Full time

Job summary

A leading renewable energy technology firm in Nottingham is looking for a Senior Software Developer. You will lead the design and development of software solutions using modern C# .NET and React. The role involves mentoring developers and shaping the technology strategy. Ideal candidates will have over 5 years of development experience, a solid background in React, and strong communication skills. This position offers an opportunity to work on impactful renewable energy technologies.

Qualifications

• 5+ years of experience in commercial software development focused on modern C# .NET.
• Hands-on background in React and frontend development (2+ years).
• Experience in leading technical initiatives and owning system architecture.

Responsibilities

• Own the design, development, and deployment of new features across backend and frontend systems.
• Provide guidance and mentorship to developers, promoting best practices.
• Collaborate with cross-functional teams to create high-performance solutions.

Skills

C# .NET

React

Agile methodologies

Microservices architecture

Communication skills

Tools

PostgreSQL

AWS

Job description

The Role

Are you a seasoned developer with a passion for building scalable, high-impact software solutions? Do you thrive in an environment where you can make strategic, hands‑on contributions to cutting‑edge technology? At ONYX Insight, we’re looking for a Senior Software Developer to join our growing team and play a key role in shaping the future of our tech stack.

This is not just another developer role – it’s an opportunity to architect, develop, and refine the technology that powers the future of renewable energy. With your expertise in modern C# .NET and React, you’ll be pivotal in delivering robust solutions that support our core platforms and products.

At ONYX Insight, we believe in empowering our teams to innovate, solve complex problems, and have a real‑world impact. As a senior developer, you’ll be in the driver’s seat, making critical decisions, mentoring your peers, and driving the technical direction of our platforms.

Key Responsibilities

• Lead, Build, Deliver: Own the design, development, and deployment of new features across both backend and frontend systems.
• Mentor & Inspire: Provide guidance and mentorship to developers, promoting best practices, knowledge sharing, and a culture of continuous improvement.
• Innovate: Collaborate with cross‑functional teams to create intuitive, high‑performance solutions that deliver value to our users.
• Shape the Future: Influence our system architecture and contribute to the long‑term technology strategy.
• Craft Scalable Solutions: Write clean, maintainable, and scalable code using modern C# .NET (6‑9) and React that stands the test of time.
• Champion DevOps: Partner with platform engineers to support CI/CD pipelines and infrastructure automation, ensuring efficiency and reliability.

Ideally, you’ll have/be:

• 5+ years of experience in commercial software development with a focus on modern C# .NET.
• A strong, hands‑on background in React and frontend development (2+ years).
• Proven experience leading technical initiatives and owning system architecture.
• Deep understanding of scalable, secure application design and microservices architecture.
• Familiarity with cloud platforms, preferably AWS.
• Proficiency with relational databases, ideally PostgreSQL.
• Knowledge of Agile methodologies and modern software delivery practices.
• Exceptional communication and collaboration skills, with a proactive mindset focused on delivering tangible results.
• A passion for solving real‑world problems with technology.

About ONYX

ONYX Insight is a growing technology and engineering organisation 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 maximise production and make turbines more reliable for longer, optimising 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.

For any further information, or to understand our products and services better, please feel free to look through our website: https://onyxinsight.com/

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.