Software Consultancy

Friendly pragmatic
software consultancy,
grounded in
real-world experience.

OnyxBox Solutions Ltd provides senior software consultancy and technical leadership to businesses across the UK.

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Software development and
technical leadership, for hire.

OnyxBox Solutions Ltd is a UK-based software consultancy run by Gareth, a software engineer with experience across the full project lifecycle - from hands-on development and system architecture through to technical leadership and stakeholder engagement.

Bringing a friendly, pragmatic, no-nonsense approach to every engagement: finding solutions that fit the problem rather than reaching for unnecessary complexity.

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Pragmatic by default

Favouring solutions that are straightforward to build, understand, and maintain - avoiding complexity unless it's genuinely warranted.

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Grounded in practice

Consultancy rooted in current, hands-on technical experience - not theory. Advice informed by what actually works in production.

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Work with your team

Love working closely with existing teams and within established processes, rather than operating at arm's length.

What we can help with.

Happy to discuss short advisory engagements, longer-term work or anything in-between.

01

Technical Leadership & Strategy

Part-time or interim technical leadership, helping organisations align technology decisions with business objectives and build effective engineering teams.

02

Software Architecture & Development

Design and delivery of robust, maintainable software - from greenfield systems to iterative improvements on existing platforms, including AI-assisted and data-driven applications.

03

Digital Transformation

Practical support for technology change: platform migrations, cloud adoption, process modernisation and identifying where AI and automation can deliver genuine business value.

04

Advisory & Reviews

Independent technical reviews and guidance on technology selection โ€” including vibe coded AI solutions, LLM integration strategies and evaluating where AI tooling is (and isn't) the right fit for your business.

Get in touch.

If you have a project or problem you'd like to discuss, we'd be happy to hear from you. Get in touch for an initial conversation to explore how we can help.

📍 United Kingdom  —  remote and on-site engagements available

We aim to respond within one to two business days.

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