Modernise Your Legacy Infrastructure with Confidence

D55 helps businesses unlock the full power of cloud computing by modernising legacy systems into agile, secure, and cloud-native applications.

Why Modernise Legacy Infrastructure?

Outdated IT systems drain resources, slow innovation, and create compliance risks. For businesses looking to embrace cloud transformation, DevOps practices, and data engineering, modernisation is no longer optional, it’s essential for growth. By moving away from legacy infrastructure and adopting AWS cloud solutions and cloud-native architectures, organisations unlock greater efficiency and resilience.
Agility – Respond faster to customer and market demands.
Cost Reduction – Lower maintenance and infrastructure spend.
Scalability – Handle workloads and user demand without disruption.
Security & Compliance – Mitigate risks with cloud-ready architectures.
Legacy Infrastructure
Modern Cloud-Native Apps

Our Approach to Modernisation

Funding Options
Full review of legacy systems, workloads, and dependencies.predictive maintenance
Identify quick wins and cloud migration pathways.
Explore available AWS/Azure funding support.
Strategy & Roadmap
Define modernisation priorities: refactor, replatform, or rebuild.
Align technology decisions with business goals.
Set milestones for your digital transformation roadmap.
xecution & Optimisation
Define modernisation priorities: refactor, replatform, or rebuild.
Align technology decisions with business goals.
Set milestones for your digital transformation roadmap.

Why Choose D55 for HR Digital Solutions

Every legacy application is different. We don't believe in a "one-size-fits-all" approach. We work with you to choose the right strategy, from simple migration to a full cloud-native rebuild, to maximise your return on investment.

Rehost (Lift & Shift)

Move apps to the cloud with minimal changes. Fastest way to exit data centres, cut costs, and handle legacy apps.

Replatform (Lift & Reshape)

Make small optimisations during migration (e.g., managed DB).Gain quick performance and cost benefits without a full rewrite.

Rearchitect / Refactor

Redesign apps into microservices for cloud-native use. Best for critical apps needing agility, scalability, and innovation

What Modernisation Unlocks

Cloud-Native Architecture
Refactor legacy applications into microservices, containers, and serverless designs.
Enable greater resilience with DevOps automation.
Improved Performance
Optimised applications with faster load times and responsiveness.
Enhance scalability through cloud infrastructure modernisation.
Support advanced data engineering for real-time insights.
Cost Efficiency
Pay-as-you-go infrastructure and reduced overhead.
Lower operational costs by consolidating legacy systems.
Future-Proofing
Built-in compatibility with evolving cloud technologies.
Stay ahead with scalable, secure, and compliant digital infrastructure.

 Outcomes You Can Expect

Enhanced Agility

Adapt quickly to market and customer changes.

Greater Innovation

Faster feature releases and new digital services. Enable experimentation with serverless computing.

Seamless Scalability

Apps designed to grow with your business.

Why Choose D55?

Cloud Specialists
Deep AWS, Azure, and multi-cloud expertise.
Tailored Solutions
Strategies designed around your infrastructure, not one-size-fits-all.
Agile Delivery
Minimal disruption, faster results.
Cross-Industry Success
Energy, pharma, retail, finance, HR.

Unlock the Full Potential of Your Data

With D55, you can integrate systems, centralise data, and build a data lake that fuels insights and innovation.

FAQs

1.  Do I need to migrate everything at once?

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No. We often recommend phased modernisation to reduce risk and disruption.

2. Which legacy systems can D55 modernise?

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From ERP and CRM platforms to bespoke applications, we modernise a wide range of systems.

3. Is funding available for modernisation projects?

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Yes — AWS and other providers often co-fund assessments and migrations.

4.How quickly will I see results?

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Clients often achieve cost savings and performance improvements within weeks of initial phases.

What our Clients Say

“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
uk-b2b-energy-company
Solving problems and supporting innovation
Real-World Success Stories
Our notable area of specialism is the energy sector, where we have deep domain knowledge. However, the commonality of the challenges means that frequently work across diverse industries, including for private equity backed growth businesses, and would love to talk to you about how D55 can redefine how you think about modernisation.

Take a look at our collection of case studies showcasing the transformative impact of partnering with D55 and AWS.

All case studies