Legacy apps slowing down your business? Our software modernisation services help UK enterprises accelerate application modernization, implement 3x faster UI/UX upgrades, and transform legacy systems over 10+ years old into future-ready platforms with full lifecycle management.
Square Root Solutions UK is a trusted software upgrade company serving businesses across the UK with end-to-end modernisation strategies. As a leading application modernisation firm, we help you shift from outdated legacy tools to agile, secure, and scalable platforms. With 100+ legacy systems transformed and a 98% project success rate in modernization, we’re known as a technology transformation provider for growing UK enterprises.
Backed by ISO 27001 & GDPR compliant software services, we’re the legacy software solution partner rated 4.9/5 by UK-based reviews that ensures lasting impact. Partner with Square Root Solutions UK top Software development company London and future-proof your systems, get your upgrade roadmap today.
We offer full-scale software modernisation services for UK businesses seeking to upgrade outdated systems. From legacy system overhaul and application re-architecture to custom software refactoring and digital system transformation, our experts help modernise and future-proof your enterprise stack.
Our services include cloud-readiness evaluation, business logic reengineering, and modern UI implemented in <30 days. Clients report up to 70% performance improvement post-modernisation, seamless third-party system integration, and cost savings of up to 40% with phased modernisation.
We conduct a complete legacy software audit involving application architecture review, system dependency mapping, and technical debt analysis. Expect 100% audit transparency, a 3-day full system diagnostics, and an actionable roadmap within 7 business days. We help evaluate outdated software, run infrastructure and code assessment, and identify performance bottlenecks to produce a full modernisation readiness report.
Our code optimisation services improve structure and performance via source code restructuring, codebase cleanup, and modularisation of software. These updates improve maintainability and scalability, offering up to 60% faster app loading speed and 40% fewer bugs after refactoring. Clients benefit from 100% maintainable and version-controlled code.
We manage end-to-end cloud infrastructure migration to platforms like Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP). Our team handles on-premise to cloud transition and shifts legacy to cloud architecture with zero data loss guarantee during migration, 99.9% SLA uptime post migration, and 30% operational cost reduction with cloud adoption.
We offer application redevelopment through advanced software reengineering services, including architecture redesign, tech stack revamp, and rebuild legacy applications from scratch. Our process delivers 3x faster user flows after reengineering and a 95% UX satisfaction rate from clients, with MVPs typically ready in 6–8 weeks.
Square Root Solutions is a UK-based modernisation firm helping businesses upgrade and streamline outdated software systems. As a trusted IT consulting partner UK enterprises rely on, we offer agile and compliant digital transformations tailored to your infrastructure. Our team brings 10+ years of modernisation experience, with local expertise in legacy system upgrades and enterprise-scale delivery.
We’re known for ISO-certified processes for security and performance, backed by 24/7 UK-based technical support. Businesses choose us as their enterprise transformation partner to reduce risk, cut costs, and modernise faster with minimal disruption.
We follow a structured, agile-first modernisation workflow that ensures legacy systems are upgraded with minimal risk and maximum value. Our approach focuses on efficiency, speed, and alignment with your long-term goals.
Begin with a full system review to map architecture, dependencies, and assess technical debt. This kicks off the 5-phase modernisation lifecycle.
Define a phased legacy system upgrade plan, backed by business logic mapping, KPIs, and a 2-week sprint delivery cadence.
Use our software reengineering process to decouple, refactor, or rebuild systems. Adopt continuous integration for restructured apps to accelerate delivery.
Execute development using our agile software modernisation framework. Each sprint delivers testable modules with stakeholder feedback loops.
Integrate upgraded modules, run full QA, and support go-live with weekly reporting cycles for transparency throughout the app upgrade lifecycle.
Software modernization is the process of updating legacy systems to current technologies and architectures. It is important because it improves performance, security, scalability, and compatibility with modern platforms. Modernization also reduces maintenance costs and enables faster innovation in competitive digital environments.
Modernising legacy applications improves performance, enhances security, reduces maintenance costs, and increases scalability. It also enables cloud integration, supports modern user experiences, and ensures compliance with current regulations. These upgrades help businesses stay competitive and adapt to evolving technology demands.
The main difference between legacy systems and modern software is that legacy systems use outdated technology and are harder to maintain, while modern software uses current frameworks, supports integration, scales easily, and receives regular updates. Modern software also offers better security and user experience.
Common challenges with outdated enterprise software include security vulnerabilities, high maintenance costs, poor integration capabilities, lack of scalability, and user dissatisfaction. These systems often fail to support modern features, slow down innovation, and increase the risk of data breaches or compliance failures.
Signs your legacy system needs an upgrade include frequent crashes, slow performance, security risks, high maintenance costs, and lack of integration with modern tools. Other indicators are poor user experience, difficulty scaling, and inability to meet current business or compliance requirements.
Application modernisation in cloud computing is the process of updating legacy apps to use cloud-native technologies like microservices, containers, and serverless architecture. This approach improves scalability, reduces operational costs, enhances security, and accelerates deployment across cloud platforms.
In the UK, the cost of legacy system modernisation typically ranges from £20,000 to over £800,000. Pricing depends on system size, code complexity, data volume, and the level of reengineering required. Cloud migration, compliance standards, and labour rates also significantly influence total cost.
Legacy software modernisation typically takes 3 to 12 months, depending on system size, complexity, and chosen modernization strategy. Small systems with limited dependencies may take under 3 months, while large-scale transformations involving cloud migration or refactoring can exceed one year.
The main difference between SaaS and custom rebuild for legacy systems is that SaaS offers faster deployment, lower upfront costs, and ongoing vendor support, while a custom rebuild provides full control, tailored features, and long-term flexibility. The choice depends on business needs and technical goals.
Top legacy software modernisation tools and platforms include Microsoft Azure Migrate, AWS Migration Hub, Google Cloud Anthos, IBM Cloud Pak, and Red Hat OpenShift. These platforms support rehosting, refactoring, containerization, and integration with modern cloud-native architectures for scalable transformation.