Principal Software Developer

TN United Kingdom; Nottingham; On-site; GBP 60,000 - 100,000; Full time

Job summary

An innovative technology firm is seeking a Principal Software Developer passionate about building scalable software solutions. In this hands-on role, you will lead the design and development of robust applications using modern C# .NET and React. Collaborating closely with cross-functional teams, you will drive technical excellence and mentor fellow developers. This position offers the opportunity to shape the future of technology in the renewable energy sector, making a meaningful impact on sustainable solutions. Join a dynamic organization focused on innovation and collaboration to optimize energy production worldwide.

Qualifications

• 5+ years of experience in commercial software development with C# .NET.
• 2+ years of hands-on experience with React and frontend development.
• Strong understanding of scalable application design.

Responsibilities

• Lead the design, development, and deployment of software features.
• Provide technical guidance and mentorship to developers.
• Influence system architecture and contribute to technology strategy.

Skills

C# .NET

React

Cloud Platforms (AWS)

Microservices Architecture

Agile Methodologies

Relational Databases (PostgreSQL)

CI/CD Pipelines

Technical Mentorship

Collaboration Skills

Job description

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Principal Software Developer, Nottingham

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Client:

ONYX Insight

Location:

Nottingham, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Reference:

316d8826ed49

Job Views:

3

Posted:

08.05.2025

Expiry Date:

22.06.2025

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Job Description:

The Role

We're looking for a Principal Software Developer who is passionate about building high-quality, scalable software and driving technical excellence across teams. This is a hands-on role that combines deep technical expertise with architectural leadership. You'll work across the full stack—primarily with modern C# .NET and React—delivering robust solutions that underpin our core platforms and products.

In this role, you'll take ownership of critical systems, guide technical decisions, and help shape the future of our technology landscape. You'll collaborate closely with engineers, product managers, and stakeholders to deliver impactful software that meets real-world needs.

Key Responsibilities:

• Architect and Develop: Lead the design, development, and deployment of features across backend and frontend systems.
• Mentor and Collaborate: Provide technical guidance and mentorship to developers, encouraging best practices and knowledge sharing.
• Drive Innovation: Work cross-functionally to design and deliver intuitive, high-performance solutions.
• Shape Technical Direction: Influence system architecture and contribute to long-term technology strategy.
• Ensure Code Quality: Write clean, scalable, and maintainable code using modern C# .NET (6–9) and React.
• Champion DevOps: Support CI/CD pipelines and infrastructure automation in partnership with platform engineers.

Ideally, you'll have/be:

• 5+ years of experience in commercial software development using modern C# .NET.
• At least 2 years of hands-on experience with React and frontend development.
• A proven track record in leading technical initiatives or owning system architecture.
• Strong understanding of scalable, secure application design and micro-services architecture.
• Experience working with cloud platforms (preferably AWS).
• Proficiency with relational databases, ideally PostgreSQL.
• Familiarity with Agile methodologies and modern software delivery practices.
• Strong collaboration and communication skills.
• A proactive, solution-oriented mindset and a focus on delivering value.

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.