Software Engineer jobs in United Kingdom

Are you a developer ready to grow your skills while contributing to impactful, scalable software solutions?

At ONYX Insight, we’re looking for a Mid-Level Software Developer to join our growing team and help shape the future of our tech stack and renewable energy platforms.

This is a fantastic opportunity to be hands-on in developing and refining technology that powers the renewable energy sector. Working with modern C# .NET and React, you'll contribute to building robust, high-performance systems that support our core products.

At ONYX Insight, we foster a collaborative environment where developers can innovate, solve real-world problems, and make meaningful contributions.

What you'll do:

• Build and Deliver: Contribute to the design, development, and deployment of new features across backend and frontend systems.

• Collaborate: Work with cross-functional teams, including designers, engineers, and product managers, to deliver user-focused solutions.

• Write Clean Code: Develop maintainable and scalable applications using C# .NET (6-9) and React.

• Support DevOps: Work alongside platform engineers to integrate CI/CD pipelines and support infrastructure automation.

What you'll have/be:

• 2–4 years of experience in commercial software development using C# .NET.

• Some hands-on experience with frontend development using React (at least 1 year).

• Exposure to application architecture concepts, such as APIs and microservices.

• Familiarity with cloud environments, ideally AWS.

• Basic experience with relational databases such as PostgreSQL.

• Understanding of Agile development practices and modern software delivery.

• Strong collaboration and communication skills, with a willingness to learn and grow.

• Enthusiasm for solving real-world problems through technology.

About ONYX

ONYX Insight is a growing technology and engineering organisation inthe renewable energy sector. Our vision is to build a more efficientfuture by becoming the world’s most innovative provider of predictivetechnology solutions. Our advanced sensing, software and analyticscombined with our engineering experience are deployed on wind turbinesaround the world to maximise production and make turbines more reliablefor longer, optimising energy production.

ONYX Insight is part of the Macquarie Group. Macquarie is a globalfinancial services group operating in 34 markets in asset management,leasing and asset financing, market access, commodity trading,renewables development, specialist advisory services, capital raisingand principal investment. The diversity of the Macquarie Groupoperations combined with a strong capital position and robust riskmanagement framework has contributed to a 54 year-record of unbrokenprofitability.

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 atour company. We do not discriminate based on race, religion, colour,national origin, gender, sexual orientation, age, marital status,veteran status, or disability status.