Cloud Application Modernization and Migration Services in the UK

Cloud Application Modernization and Migration Services in the UK

Rigid on-prem systems, rising infrastructure costs, security pressure, and slow feature delivery are clear signs to rethink how your applications run. Devox Software helps UK companies modernize applications for the cloud and implement a strong application cloud migration strategy that keeps the business running while you move forward.

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Our Services

Cloud Application Migration Strategy in the UK

  • Cloud Migration Strategy

    We evaluate your applications and infrastructure to define the optimal migration path per workload, providing total cost and risk transparency before writing code.

    • Application portfolio assessment. We analyze each application and recommend the right path for it, from a quick rehost to a full re-architecture.
    • Dependency discovery. We trace application dependencies and environment-specific configuration before workloads are split into migration waves.
    • Total cost of ownership analysis. We compare current run-rates against right-sized cloud projections, fully factoring in licensing and egress fees.
    • Cloud platform selection. We compare the major cloud platforms against your workloads and recommend the best fit, including hybrid and multi-cloud options.
    • Migration roadmap. We build a phased migration plan with rollback options and sequence the work around your business priorities.
  • Legacy Application Modernization

    We retain your proven business logic while modernizing surrounding code, accelerating release velocity, and enabling native cloud auto-scaling.

    • Replatforming. We move applications to managed cloud services with targeted changes that deliver quick wins.
    • Runtime upgrades. We move older .NET and Java applications to current long-term support versions.
    • Behavior-preserving refactoring. We restructure critical logic, establish comprehensive test coverage around existing behavior, and modernize behind validated boundaries instead of rebuilding from scratch.
    • Containerization. By packaging applications in containers, we ensure consistent deployment across environments.
    • AI-ready modernization. We prepare your applications and data so AI features can be added later without another major rebuild.
  • Monolith-to-Microservices Modernization

    Monoliths slow team velocity as products scale. We decompose them incrementally along domain boundaries without downtime, validating each service in production before extracting the next.

    • Service boundary mapping. We combine domain boundaries with system dependencies, so the service that looks right on a diagram is also safe to extract.
    • Strangler fig migration. New services gradually take over functionality from the monolith, one capability at a time.
    • Parallel data writes. Data flows to both old and new systems until parity is proven.
    • Feature-flag releases. With new paths going live behind feature flags, you can switch back instantly if needed.
    • Kubernetes orchestration. Your services run on Kubernetes with automated scaling and self-healing deployments.
  • Cloud Database Migration

    We move legacy databases to modern cloud-native platforms with careful validation at every step.

    • Legacy database conversion. We migrate Oracle and SQL Server databases to cloud-native platforms, along with older engines such as IBM DB2 and Informix.
    • Schema optimization. We restructure schemas and tune queries for cloud performance.
    • Online migration. Continuous replication via tools like AWS DMS or Azure Database Migration Service minimizes cutover downtime.
    • Automated validation. AI-assisted checks confirm that every record arrives complete and correct.
    • Cross-cloud data migration. We move databases between cloud providers and operating systems whenever your strategy changes.
  • Multi-Cloud Migration

    Inter-cloud migration in the UK is increasingly viable due to reduced egress fees and better interoperability. Whether shifting providers or executing a multi-cloud strategy, we engineer workloads for portability and cost predictability.

    • Cloud-to-cloud migration. We move workloads from one provider to another with phased cutovers and tested rollback plans.
    • Multi-cloud architecture. Designing tailored environments allows us to place each workload where it runs best.
    • Portable infrastructure as code. Terraform definitions let you rebuild environments consistently across platforms.
    • Egress cost planning. We plan data movement to make the most of reduced switching costs.
    • Licensing review. We assess how your software licenses affect cost on each cloud before you commit.
  • Cloud Platform Engineering

    By automating deployments, monitoring, and cost controls, we make the new environment much easier to run.

    • CI/CD pipelines. We build automated build and deployment pipelines with GitOps practices for repeatable releases.
    • Infrastructure as Code & Secrets Management. We automate infrastructure deployment via Terraform and secure credentials using HashiCorp Vault.
    • Observability and alerting. We set up Datadog, Prometheus, or similar tools so your team can spot problems before they turn into incidents.
    • Continuous validation. Running automated tests through CI/CD on every change ensures quality, while production monitoring gives the team evidence that each release behaves as expected.
    • Cloud cost optimization. Right-sizing and regular usage reviews trim cloud waste month after month.
Our Process

Cloud Migration Workflow

We talk you through every decision and keep a way back ready at each stage.

01.

01. Getting to know your system

We map codebases and infrastructure to surface every hidden dependency, including undocumented legacy configurations. What you walk away with: Full visibility into current architecture, target state requirements, and precise effort estimates.

02.

02. Planning the move together

We align on migration strategies per application, rehosting where appropriate and modernizing core assets. We build ROI models comparing current operating costs against cloud run rates, inclusive of licensing and data transfer. What you walk away with: a phased roadmap and budget you can take to your leadership team.

03.

03. Proving it on something small

Before full execution, we establish pilot exit criteria: dependency validation, data migration speeds, operational monitoring, and rollback protocols. Mission-critical workloads move only after passing pilot checks. What you walk away with: a working cloud pilot and a migration plan tested against a real workload.

04.

04. Moving in waves

We execute phased wave migrations. Background data replication ensures continuous uptime, with cutovers scheduled during off-peak hours. Every wave includes automated rollback plans and real-time execution tracking. What you walk away with: applications running in the cloud and documentation that stays current with every change.

05.

05. Settling in

We optimize cloud utilization, tune performance, and drive down ongoing spend. Finally, we complete a full operational handover and team enablement. What you walk away with: a stable cloud environment and a team that knows how to run it.

  • 01. Getting to know your system

  • 02. Planning the move together

  • 03. Proving it on something small

  • 04. Moving in waves

  • 05. Settling in

Our Benefits

Benefits of Our Cloud Application Modernization and Migration Services in the UK

  • We've handled the hard migrations

    We specialize in high-risk enterprise migrations. Past engagements include migrating a fintech platform with 450,000 LOC to Azure with zero downtime, modernizing an insurance platform serving over 2M users, and improving core system response times by over 40%.

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  • AI does the heavy lifting. People make the calls.

    We leverage AI to map codebases, trace dependencies, draft refactoring plans, and generate test suites. All automated changes pass through secure controls with full logging and mandatory senior engineer code review before merging.

  • Trusted by teams in the UK

    We already work with companies across the UK, including Magma Trading and M3 Network, whose reviews mention both our technical depth and how easy the team is to work with. Across all our clients, 98% would recommend us, and we hold a 5.0 rating from 45 verified reviews on Clutch.

  • A team that works your hours and leaves the system in better shape

    Operating from Central and Eastern Europe (UTC+1/UTC+2), our team provides complete daily overlap with London working hours. We continuously update architectural documentation, equipping your internal team for long-term ownership.

Our Vision

We’ve worked extensively in terms of geography and sector, developing a variety of work — products, services, and experiences — that has taught us that a well-defined visual strategy is key to bring visibility, credibility, and funds to any organisation. Starting in 2018, we decided to plant a tree for each client that we work with.

70

+

Successfully completed projects

71

%

Devox Software annual growth

100

+

Tech specialists on board

82

%

Clients with us for more than 2 years

Case Studies

Our Latest Works

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Multilogin Multilogin

Multilogin: Anti-Detection Browser and Multi-Account Management Platform for Global Marketers

A purpose-built platform that empowers marketers to manage multiple social media accounts safely, bypass detection, and run scalable campaigns without interruptions.

Additional Info

Core Tech:
  • Chromium
  • Firefox
  • JavaScript
  • Node.js
Country:

Estonia Estonia

Offshore Development Center for a UK Software Provider

Offshore Development Center for a UK Software Provider

We’ve operated an Offshore Development Center in the UK, driving nearly 20 fintech projects as part of a long-standing agile collaboration.

Additional Info

Green Space Pro: Franchise Management Platform for a Highly-Regulated Industry Green Space Pro: Franchise Management Platform for a Highly-Regulated Industry

Green Space Pro: Franchise Management Platform for a Highly-Regulated Industry

A centralized digital workspace for cannabis franchise vendors and regulators to manage operations, ensure compliance, and streamline regulatory communication in a highly regulated industry.

Additional Info

Core Tech:
  • Svelte.js
  • Node.js
  • REST API
  • CI/CD
  • Progressive Web App (PWA)
  • manual and automated QA
Country:

USA USA

Awards & Certifications

Industry Contribution Awards & Certifications

Check Devox Software’s awards on rating and review platforms, recognized among the top software development companies, along with the certifications our team members hold.

  • Awards
  • Certifications
  • UpWork

    UpWork

  • Clutch

    Clutch

  • The Manifest

    The Manifest

  • DesignRush

    DesignRush

  • MC.today

    MC.today

  • Clutch

    Clutch

  • Clutch

    Clutch

  • AppFutura

    AppFutura

  • Clutch

    Clutch

  • GoodFirms

    GoodFirms

  • DesignRush

    DesignRush

  • UpWork

    UpWork

  • Professional Scrum Master™ II (PSM II)

    Professional Scrum Master™ II (PSM II)

  • Professional Scrum Product Owner™ I (PSPO I)

    Professional Scrum Product Owner™ I (PSPO I)

  • Microsoft Certified: DevOps Engineer Expert

    Microsoft Certified: DevOps Engineer Expert

  • Microsoft Certified: Azure Administrator Associate

    Microsoft Certified: Azure Administrator Associate

  • Quality Assurance ISTQB Foundation Level

    Quality Assurance ISTQB Foundation Level

  • Java Development Certified Professional

    Java Development Certified Professional

  • JavaScript Developer Certificate – W3Schools

    JavaScript Developer Certificate – W3Schools

  • Certified Artificial Intelligence Scientist (CAIS)

    Certified Artificial Intelligence Scientist (CAIS)

  • Oracle Database SQL Certified Associate

    Oracle Database SQL Certified Associate

Insights

Some Insights into Cloud Migration and Modernization Services

Transparent Consulting Over “Cheap Outsourcing”: How We Integrate AI into the Client’s SDLC

AR Internal Research Automation: How We Built a Research Automation Script Using Web Archives

Top Software Development Companies in Miami, Florida (2026)

Testimonials

Testimonials

Carl-Fredrik Linné                                            Sweden

The solutions they’re providing is helping our business run more smoothly. We’ve been able to make quick developments with them, meeting our product vision within the timeline we set up. Listen to them because they can give strong advice about how to build good products.

Darrin Lipscomb Darrin Lipscomb
Darrin Lipscomb United States

We are a software startup and using Devox allowed us to get an MVP to market faster and less cost than trying to build and fund an R&D team initially. Communication was excellent with Devox. This is a top notch firm.

Daniel Bertuccio Daniel Bertuccio
Daniel Bertuccio Australia

Their level of understanding, detail, and work ethic was great. We had 2 designers, 2 developers, PM and QA specialist. I am extremely satisfied with the end deliverables. Devox Software was always on time during the process.

Trent Allan Trent Allan
Trent Allan Australia

We get great satisfaction working with them. They help us produce a product we’re happy with as co-founders. The feedback we got from customers was really great, too. Customers get what we do and we feel like we’re really reaching our target market.

Andy Morrey                                            United Kingdom

I’m blown up with the level of professionalism that’s been shown, as well as the welcoming nature and the social aspects. Devox Software is really on the ball technically.

Vadim Ivanenko Vadim Ivanenko
Vadim Ivanenko Switzerland

Great job! We met the deadlines and brought happiness to our customers. Communication was perfect. Quick response. No problems with anything during the project. Their experienced team and perfect communication offer the best mix of quality and rates.

Jason Leffakis Jason Leffakis
Jason Leffakis United States

The project continues to be a success. As an early-stage company, we're continuously iterating to find product success. Devox has been quick and effective at iterating alongside us. I'm happy with the team, their responsiveness, and their output.

John Boman John Boman
John Boman Sweden

We hired the Devox team for a complicated (unusual interaction) UX/UI assignment. The team managed the project well both for initial time estimates and also weekly follow-ups throughout delivery. Overall, efficient work with a nice professional team.

Tamas Pataky Tamas Pataky
Tamas Pataky Canada

Their intuition about the product and their willingness to try new approaches and show them to our team as alternatives to our set course were impressive. The Devox team makes it incredibly easy to work with, and their ability to manage our team and set expectations was outstanding.

Stan Sadokov Stan Sadokov
Stan Sadokov Estonia

Devox is a team of exepctional talent and responsible executives. All of the talent we outstaffed from the company were experts in their fields and delivered quality work. They also take full ownership to what they deliver to you. If you work with Devox you will get actual results and you can rest assured that the result will procude value.

Mark Lamb Mark Lamb
Mark Lamb United Kingdom

The work that the team has done on our project has been nothing short of incredible – it has surpassed all expectations I had and really is something I could only have dreamt of finding. Team is hard working, dedicated, personable and passionate. I have worked with people literally all over the world both in business and as freelancer, and people from Devox Software are 1 in a million.

FAQ

Questions and Answers

  • Where do we start with a legacy system?

    We analyze codebase dependencies and interview key engineering stakeholders to capture institutional knowledge that isn’t documented.

    Working across several markets? We also offer application modernization in the UK.

  • Will customers notice?

    No. Data syncs continuously in the background while legacy systems remain online. Cutovers are dry-runs in advance, executed during low-traffic maintenance windows, and backed by instantaneous rollback mechanisms.

  • Lift and shift or modernize?

    We evaluate this application by application. Rehosting offers immediate exit from legacy data centers, while modernizing yields high ROI for core applications requiring high release velocity. Many clients rehost first, then refactor incrementally.

  • How do you prevent vendor lock-in?

    We mandate cloud-agnostic patterns from the start. Infrastructure is codified in Terraform, workloads are containerized for portability, and software licensing impact is modeled across providers before deployment.

  • Will the cloud actually save money?

    Yes, provided resources are correctly sized and managed. We build upfront TCO models including licensing and data egress, then enforce continuous FinOps review post-launch to eliminate waste.

  • Who will we be working with?

    You will work with dedicated senior engineers based in CEE. You evaluate team members before kickoff, and they integrate directly into your communication channels and agile ceremonies.

  • How do we get started?

    Book a call with one of our engineers. We’ll talk through your system and what’s pushing you to move.

Book a call

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Contact Us

We Fix, Transform, and Skyrocket Your Software.

Tell us where your system needs help — we’ll show you how to move forward with clarity and speed. From architecture to launch — we’re your engineering partner.

Book your free consultation. We’ll help you move faster, and smarter.

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Share the details of your project – like scope or business challenges. Our team will carefully study them and then we’ll figure out the next move together.







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