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EXPLORE THE POSSIBLE WITH D55

Book a complimentary discovery session with our senior team.

Book now
EXPLORE THE POSSIBLE WITH D55

Book a complimentary discovery session with our senior team.

Book now

WHY D55?

We believe technology should make business simpler, not more complicated.

Technology has transformed the way businesses operate, but too often it creates complexity instead of reducing it. That's why D55 exists.

We help ambitious organisations make better business decisions by aligning strategy, people, process and technology around what matters most. Because when the business is understood, the technology becomes much easier to get right.

We think differently

Before recommending a platform, discussing AI or writing a line of code, we take the time to understand your ambitions, your people and the way your business works today.

Only then do we simplify processes and introduce technology that supports long-term growth. That's why every engagement follows the same philosophy. That's why every engagement follows the same philosophy.

  1. Mindset
  2. People
  3. Process
  4. Technology

Meet Our Directors

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Jonathan Rothwell
Founder & CEO
Jonathan Rothwell is the Founder & CEO of D55, with over 23 years’ experience as a Managing Director and IT Director, building and scaling digital businesses globally. He founded D55 in 2018 to help organisations turn complex technology change into clear commercial outcomes.
A serial entrepreneur and transformation leader, Jonathan specialises in large-scale digital transformation and lean MVP delivery, using cloud and software to unlock new revenue, improve efficiency, and modernise core systems.
He leads D55 with a relationship-first mindset, grounded in clarity, trust, and long-term partnership — values that continue to shape how D55 helps organisations modernise, innovate, and grow.
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Rhys Jacob
Co-Founder & CTO
Rhys Jacob is Co-Founder & CTO of D55, with over 20 years’ experience designing and delivering complex digital platforms. With a background in distributed systems, he has led products from early concept through to scalable, enterprise-grade applications.
Passionate about architecting solutions that deliver real-world results, Rhys combines deep engineering expertise with pragmatic delivery. At D55, he ensures cloud and application modernisation programmes are secure, scalable, and built for long-term value.

We work with you, not around you.

No one understands your business better than you do. Our role is to combine your knowledge of your business with our experience of helping organisations overcome similar challenges.

Together, we bring fresh perspective, transfer skills and build the confidence to move your business forward.

Senior people. Trusted relationships.

From your first conversation to long after delivery, you'll work directly with experienced specialists who stay with you throughout the journey.

The people shaping the strategy are the same people designing the architecture, solving technical challenges and supporting your business as it evolves.

Why businesses trust D55

  • AWS Advanced Consulting Partner expertise
  • More than 30 senior specialists
  • Senior people from strategy through to delivery
  • Trusted by Bryt Energy, Amber Energy, Switch2, ENSEK, Kooomo, Lloyd's List Intelligence, Janes and many more
  • More than 50 AWS certifications
  • Direct access to senior engineers throughout every engagement

Technology should create confidence.

Technology isn't the goal. Better business decisions are. Our clients aren't looking for another platform or another dashboard. They're looking for confidence. Confidence in their data and the decisions they make. Confidence that the next stage of growth is built on solid foundations.

That's why we always start with the business before recommending the technology.

Why businesses choose D55

  • Diagnose First approach
  • Complimentary Data Strategy Diagnostic
  • Complimentary AI Inspire Workshop
  • AWS Funding unlocked
  • One team from discovery to delivery

Building capability, not dependency.

Our aim is simple. To leave your team stronger than we found it. That's why skills transfer is built into every engagement. We work openly alongside your people, explain our thinking and share our knowledge so your team has the confidence to own what we've built together.

We're here to help your business become more capable.

Built on relationships.

We believe in partnerships. We'd rather earn a trusted relationship than win a project. Many of our client relationships have grown over years as their businesses have evolved.

They trust us because we'll always recommend what's right for their organisation, even if that means waiting, simplifying the solution or deciding that now isn't the right time. When our clients grow, we grow with them.

“While we led the initial business scoping and discussions with key stakeholders, it was a very smooth process working the D55 team to expand on this vision. The D55 team took ownership of building the solution and worked closely with us throughout the process. The quality of the work, combined with the excellent support during the handover, is exactly what we value in a partner.”

Andrew Thomas
CTO
Amber

"D55 enabled us to migrate from on-premise to a cloud-based solution, resulting in monthly cost savings of about 40%. Cloud-based systems give us a high level of resiliency and an unlimited capacity to scale. We’ve really put in place the foundations for later phases of work and further cost reduction as we scale. It was a partnership as opposed to a service - we work well together. "

Roger Worsley
CTO
kooomo

"Excellent technical knowledge, productive and responsive. Will go the extra mile to ensure customer satisfaction."

Chris Trigg
Co-Founder, Managing Director
ongen

"D55 are a highly experienced team that helped lead our business to push for and deliver an innovative and ambitious legacy to AWS transformation, with confidence. D55 have become a valued development and consultancy partner thanks to their excellent practical capability and their ability to apply the most appropriate working methodology to the challenge at hand."

Ed Berry
Head of Digital Products
switch2

"D55 have helped to develop our CRM system and have been a valued partner in this process. We continue to work with D55 on our application development and would have no hesitation to recommend them."

Andrew Bright
Director
itp-energised

"D55 have proved to be an excellent development partner offering expertise and predictable delivery, with flexibility to respond to changing business needs. They have helped us explore new AWS technologies, challenged our thinking and sped up our adoption of relevant platform services."

Arran Stevenson
Director of Architecture
ensek

“D55 has been transformative for our business. They understood the business and our challenges and built a system that supports how we work now, as well as leveraging new technologies which are more cost-effective and increase our speed to deliver. Thanks to D55 we don’t have to worry about the day-to-day, so we can focus on the exceptional issues facing our industry."

D55 Client
CTO
energy

Trusted. Energised. Ready to act.

Whether you're looking to unlock the value of your data, modernise applications, prepare for AI or simply understand what's holding your business back, we'd love to hear your story.

Every successful engagement starts the same way. With your business. Not the technology.

We believe in partnerships. We'd rather earn a trusted relationship than win a project.