Application Modernisation Services

Unlock the value of your applications with AWS-aligned, cloud-first application modernisation services tailored to your business needs.

Modernise More Than Just Applications

At D55, we go beyond migrating workloads, we rebuild, refactor, and reimagine your entire application landscape on AWS for performance, scalability, and innovation.

Our Focus Areas:

Applications: Refactor or replatform legacy systems into agile, cloud-native architectures.

Databases: Migrate and optimise with AWS services like Aurora, DynamoDB, and RDS.

DevOps & Automation: Accelerate delivery through CI/CD pipelines and automated workflows.

Serverless & Containers: Deploy faster, scale seamlessly, and eliminate infrastructure overhead.

Security & Compliance: Embed AWS-native controls aligned with GDPR, HIPAA, and ISO standards.

With proven AWS expertise, we help you unlock cost savings, resilience, and faster innovation, turning legacy systems into modern business assets.

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Lift and Shift

Also called rehosting, this approach moves your applications from on-premises to AWS with minimal changes to code or architecture, ideal for quick wins.

Replatforming

The middle ground between lift-and-shift and refactoring. Applications are migrated to AWS with targeted updates, such as switching to a managed database (e.g., Amazon Aurora), to improve performance and reduce costs.

Refactoring

The most transformative approach. Applications are restructured or rebuilt using cloud-native architectures like containers, microservices, and serverless to maximize agility, scalability, and innovation.

Get Your Free Modernisation Assessment

AWS Microsoft Modernisation Programme with D55

Free your Microsoft workloads and cut licensing costs by moving to AWS. With D55’s Microsoft Workloads Competency and access to AWS funding programmes, we help you modernise with less risk and more impact.

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Viability Assessment

Our free Modernisation Viability Assessment pinpoints the best opportunities for cloud transformation, complete with target architecture and projected business outcomes.

Roadmap

A clear, tailored plan for moving to AWS, detailing project costs, resources, and timelines upfront so you know exactly what to expect.

Get a Free Modernisation Viability Assessment

Why Modernise with D55?

Modernising on AWS with D55 isn’t just a tech upgrade, it’s a partnership that delivers lasting value:

Proven Expertise

As an AWS Advanced Consulting and Migration Competency Partner, we bring deep experience to simplify even the most complex migration and modernisation projects.

Funding Support

Alongside innovation, we help unlock AWS funding options to keep your modernisation journey cost-efficient.

Adaptable Approaches

Whether you’re modernising during migration, fine-tuning after the move, or tackling full or partial upgrades, we shape our support around your priorities.

Integrated Support

From DevOps enablement to governance, we cover the full lifecycle.

Collaboration

Our team will blend right into yours, working closely with your systems and teams (and upskilling your people along the way).

Start your journey

Ready to Modernise? Let’s Build What’s Next.

Book a free assessment with our cloud team. We'll review your setup and provide a tailored roadmap for success, including cost and funding options.

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Frequently Asked Question

1. How do I know if I should modernise or just migrate?

We assess your applications and business goals to determine the best-fit approach. Some workloads may need refactoring; others can lift-and-shift.

2. How long does modernisation take?

It depends on system complexity. We typically deliver initial modernisation within 6–12 weeks.

3. Can we access AWS funding support?

Yes. D55 works with AWS to secure MAP or Microsoft Modernisation support based on your environment.

4. What if we’ve already migrated to AWS?

We can still help you optimise or modernise post-migration to fully leverage cloud benefits.

Download the E-book: Building Modern Applications with AWS.

This eBook explores how organisations can accelerate innovation, reduce costs, and enhance digital experiences by modernising applications on AWS through three pathways — rebuilding for the cloud, adopting containers and serverless, and embracing modern DevOps.

Download the E-book

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."

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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