Application modernisation services for UK companies
Ageing applications slow teams down, limit innovation, and make every new integration a struggle. Vention’s legacy application modernisation services replace technical debt with adaptability, helping UK organisations scale faster, adopt AI securely, and stay competitive.
With AI-enabled teams, seamless delivery, and transparent daily communication, we give you true peace of mind at every stage of transformation.
Key signs your software needs a revamp
Software obsolescence is not always as obvious as one may think and is not necessarily shown as legacy code. Working with businesses of various sizes and industries, we know what the signs that your system requires modernisation look like.
Business perspective
- Increased maintenance and operational costs
- Compliance and security risks
- Outdated user experience
- Inability of the software to support business growth goals
- Difficulty integrating with modern tools and platforms
Technical perspective
- Outdated technology stack
- Accumulation of technical debt
- Performance and reliability issues
- Monolithic or tightly coupled architecture
- Existing data siloes
- Existing security vulnerabilities
Vention’s application modernisation services
Software modernisation consultancy
Vention doesn’t do modernisation for the sake of it. We help companies transform legacy systems into modern, high-performing, and future-proof software, which is aligned with their short- and long-term business growth goals.
Our consultants assess the current state of your software systems, spot bottlenecks and opportunities for modernisation and revamp. We also help choose tools and technologies and create a step-by-step roadmap up to the software launch.
Cloud enablement
Looking for convenient global system accessibility, boosted scalability, and rapid deployments? Then the cloud should be your priority.
Partnered with AWS, Microsoft, Google Cloud, and Oracle, we know how to make the most out of your cloud, whether it is a public, private, or hybrid deployment. Vention helps transfer your applications and data from on-premises to the cloud environment, ensuring business continuity and complete data safety.
Tech stack modernisation
Keeping your technology stack up to date helps ensure top performance, best security, and long-term reliability. Vention migrates outdated frameworks to the latest languages and architectures, rearchitects monolithic systems into modular or service-oriented designs, and improves scalability to match your evolving business needs.
Integration services
Isolated applications rarely deliver value. As a well-established application modernisation company, Vention helps integrate your disconnected systems, ensuring seamless data flow for even the most critical business operations. Whether connecting analytics platforms, adding AI capabilities, or linking IoT devices through custom APIs or pre-built connectors, we ensure your systems operate as one.
UI/UX revamp
Meeting modern design standards and user expectations can be just as challenging as maintaining the backend. We start by analysing pain points, design gaps, and user behaviour, then refine every aspect of the interface, from layout and colours to navigation and performance. Each design update supports your business goals and delivers a smoother, more accessible user experience.
Ongoing application support and optimisation
Want to reduce maintenance costs or lack in-house resources to ensure your app’s continuous support? Vention establishes ongoing security and performance monitoring over your software, timely identifying and addressing issues, as well as introducing regular updates and necessary enhancements.
Don’t let your legacy app drain money out of your pocket
Vention will help with secure, safe, and time-optimal modernisation, giving you the engineering peace of mind to focus on your business, not managing software.
Modernisation tactics we offer
Each case of legacy application modernisation requires a unique approach, depending on the type of your software, existing issues, and the objectives you want to achieve. As a legacy software modernisation company, Vention takes care of every step, from diagnosing issues and defining the right strategy to executing changes that align technology with your growth vision.
What’s under the bonnet
When to use
Business value
Risks and limitations
Rehost
What’s under the bonnet
We move your application from one hosting environment with no or minimal changes to the app’s code.
When to use
You do not need to change your app's functionality, and you want to move to the cloud quickly.
Business value
You benefit from cloud infrastructure advantages, like better scalability, reliability, and cost savings.
Risks and limitations
A low-risk modernisation approach. Yet, as code and architectural changes are out of scope, app-related issues may persist.
Replatform
What’s under the bonnet
Similar to rehosting, we transfer your app from one environment to another, but with code adaptation and minor architectural changes.
When to use
You need to migrate to the cloud and ensure seamless adaptability of your app to the new platform.
Business value
You stand to benefit from cloud efficiency, scalability, and optimised expenses.
Risks and limitations
A medium-risk modernisation approach, as it may require additional modifications over time.
Refactor
What’s under the bonnet
Our developers improve the design of your app’s code by cleaning it, removing duplicates, and reconsidering some fragments without altering the core functionality.
When to use
You have solid application functionality, but a messy codebase that is resource-intensive to maintain.
Business value
You have a reduced technical debt and clean, readable code that is easy to maintain, update, add new features, or move to the cloud.
Risks and limitations
Low risks, but the modernisation is limited only to the codebase, with no architectural changes made.
Rearchitect
What’s under the bonnet
Vention moves your app from monolithic to microservices/ serverless/cloud-native/event-driven architecture, refactoring core app components, revising data flows and integration patterns, adding load balancing, caching, or asynchronous messaging.
When to use
Adding new features to your app requires major code rewrites, you experience scalability or performance issues, it’s hard to integrate with modern systems, or your business plans require architectural changes, e.g., to move further to the cloud.
Business value
You gain improved software agility and scalability, reduced maintenance costs in the long run, as well as easier integration with advanced techs and solutions.
Risks and limitations
Rearchitecting involves high risks related to greater upfront costs, possible challenges related to integration and operational complexity.
Rebuild
What’s under the bonnet
Instead of migrating or refactoring existing code, our team develops a new system, using modern technologies and architectures, while preserving its core purpose and functionality and adding new features and enhancements.
When to use
You have deep-rooted design flaws and obsolete technologies, which make refactoring or rearchitecting insufficient to ensure your app adapts to your evolving requirements for the app’s capabilities.
Business value
You entirely eliminate technical debt and get a modern, high-performing application that is scalable, easy to integrate with AI and data analytics, and easy to maintain.
Risks and limitations
A high-risk and the most time-consuming and expensive modernisation approach. Plus, you have to maintain two projects at the same time: build a new app while retaining the old one for users.
Our case studies
Who Vention helps with app modernisation
Regardless of the size of your business, modernising legacy systems can enhance your efficiency and competitiveness, help you strengthen your compliance, and improve the reliability that your customers expect.
We modernise software for:
- Startups to eliminate technical debt early and support active growth;
- Ambitious SMBs to streamline workflow efficiency and reduce operational costs;
- Enterprises to ensure better IT ecosystem efficiency and stability under high loads, support compliance, and reduce maintenance expenses.
We serve every need of your industry
Industry trends don’t stand still, and neither should your software. Drawing on expertise in 30+ industries, Vention is a trusted legacy application modernisation company that works closely with you to build a refinement strategy that fits your goals and industry requirements.
Modernising your fintech software strengthens security, ensures compliance with evolving regulations, and opens the door to AI-powered insights.
With scalable, cloud-first architectures, you’ll deliver faster transactions and frictionless experiences, as well as stay ahead of FCA regulatory changes, all while building stronger customer trust.
Ageing technology can hinder patient outcomes. At Vention, we modernise clinical systems to run securely in the cloud, ensuring full interoperability and helping maintain compliance with NHS and GDPR standards.
With AI-powered analytics, telemedicine integration, and secure data sharing, your teams can gain real-time insights that improve patient care, operational efficiency, and clinical decision-making.
Manufacturing
By modernising your ERP, MES, and SCADA solutions, you create a unified digital backbone of your factory powered by modern APIs, industrial IoT integrations, and predictive analytics.
Vention replatforms your systems on modern infrastructure, sets up containerised deployments, and redesigns dashboards for real-time visibility.
Transportation and logistics
From warehouse to fleet management, even minor system inefficiencies can incur significant operational costs.
We refactor your existing software, enable system integrations with GPS, telematics, and partner APIs, and deploy scalable architectures that support real-time monitoring.
Vention offers application modernisation services to help automotive companies stay competitive as the industry advances towards electrification, connected vehicles, and stricter safety standards.
We rearchitect legacy diagnostics platforms, dealer management systems, as well as OEM and production software onto secure, cloud-native foundations that support real-time data, telematics integrations, and compliance with evolving regulatory frameworks.
Vention modernises legacy CRMs, analytics platforms, and booking systems with cloud-based solutions that integrate seamlessly with IoT property data and AI-powered valuation models.
From automated workflows to virtual viewing tools, you’ll gain a modern ecosystem that empowers agents, engages clients, and drives smarter investment decisions.
We modernise marketing platforms by migrating data pipelines and ad servers to the cloud, enabling real-time bidding, dynamic segmentation, and AI-driven personalisation.
With modern architectures and privacy-by-design compliance, you can unlock omnichannel campaign optimisation, improve ROI, and react instantly to audience behaviour across all channels.
Whether you’re supporting thousands of learners globally or running a local e-learning app, modernisation ensures your platform delivers the smooth experience your users expect.
Vention transforms outdated edtech platforms into scalable, cloud-native ecosystems with AI-driven personalisation, adaptive learning paths, and analytics dashboards.
Shoppers expect instant, personalised, and secure experiences, which legacy platforms rarely deliver.
Vention helps ecommerce businesses migrate to cloud-native architectures, implement microservices, and harness AI for product recommendations, dynamic pricing, and customer insights.
Behind every great game is great technology, but legacy engines can limit performance and creativity.
We modernise game development infrastructures with cloud-based build systems, CI/CD pipelines, and AI-driven QA automation. Our team also helps you accelerate updates and deliver seamless player experiences while reducing operational overheads.
Revamping your software with compliance in mind
Vention helps you innovate with confidence while protecting your business and your customers' data and helping align with UK standards and regulations, including GDPR, FCA requirements, NHS Digital frameworks, and ISO 27001 certification.
If you’re seeking scalability, sustainable growth, cutting-edge technology, improved user experiences, and meaningful data insights, we’re here to support you.
Hear from our expert
Many organisations perceive software modernisation as a waste of money on something that already works. But our long-standing client partnerships prove the opposite.
When done right, application modernisation doesn’t drain your budget. It actually helps reduce your operational bills, strengthen security, and, most importantly, drive innovation and new revenue streams. By opting in for software modernisation services, you turn your IT from a cost centre into a value driver.”
Jamie French
Technical Engagement Manager at Vention,
UK
Ready to modernise your app and stay ahead of the competition?
Legacy modernisation doesn’t have to be complicated. With Vention, every stage of the process is clear and built around your business goals.
Why Vention
Years of experience in software modernisation
Clients served to date (and counting!)
Experts on tap
Per year saved by our clients through our services
Expertise in developing and integrating modern techs, including AI, VR, IoT, and blockchain
ISO 27001-certified to guarantee our clients’ data security
Peace of Mind Promise, committing to a fast kickoff, frictionless scaling, dedicated project advocates, and regular quality assessments
Compliance with UK national and industry standards and regulations
Testimonials
Our strongest endorsement comes from partnerships that last, with clients staying an average of 28 months as we bring their vision to life.
Nauris Bloks
“After receiving Investment Brokerage services license we needed to re-design our web application according to new business model and offering. Project is still in development, but implemented features makes page much more compelling and with better user experience. Also implementation speed due to new tech is much faster and easier. They are interested to give best to our project and team. They are not the cheapest, but performance is great."
Christopher Osborn
“Our mobile application lagged behind or didn't include the features of our web application. Our mobile application feature set is now on par or ahead of our web application. We continue to work with Vention on this project. For a completed projects, we handed off the upgrade of our application from a deprecated version of Python. Without this upgrade, we would not have been in compliance with security standards.”
“We have used the team for a large scope of work, but key things have been upgrading our Python backend, migrating our database to SQL and updating our JavaSript code base to use React. Their team is easy to work with, and they all continue to work hard.”
Anonymous
“They helped us refactor and modernize 4 of our projects. Vention freed up the rest of the team, allowing them to focus on our primary strategic project, which was time-sensitive. They never dragged anything on, were very clear, and, surprisingly, figured things out faster than we expected. We had some legacy spaghetti code which was not well-documented, but they did reverse-engineering and figured things out. Vention is good at scoping out projects, delivering on time and acting as a strike team which can jump in and sort out things, especially with less glamorous refactoring work. They were very eager and thorough in their work. The whole experience was very positive.”
Vention’s approach to modernising legacy apps
Vention knows how important it is to ensure uninterrupted business operation and remain compliant during software updates. We always tailor the process to individual needs and follow a four-pillar legacy modernisation strategy.
Discovery and assessment
Before making any changes to your app’s code, our team takes a deep dive into your software ecosystem to identify bottlenecks and modernisation opportunities. Vention selects the most suitable technologies to drive improvement and develop a clear roadmap that leads your product from concept to launch.
Compliance and risk management
For each modernisation project, Vention considers your business and industry-specific needs to minimise risks during the modernisation process. We also ensure the process itself and the upgraded software comply with your industry regulatory requirements.
Collaborative delivery
Your app modernisation isn’t just an IT initiative. We bring business stakeholders together with our development and security expertise to align priorities, confirm feasibility, ensure security and continuity, and deliver modern, resilient software.
Local expertise, global scale
Our UK-based CTO ensures onsite support and local guidance, while our Europe-based developers provide the needed cost-efficiency for your projects. Our teams are located in Poland, Lithuania, Bulgaria, and Slovakia, which ensures minimal time differences with our UK clients.
Legacy application modernisation tools Vention employs
Technologies work best when applied in situations for which they were created. Vention always chooses the most suitable techs that will perfectly fit your project and help achieve your business goals.
Programming languages
Java
Python
.NET
Golang
Ruby
JavaScript
C++
Go
Rust
PHP
Swift
Kotlin
Objective-C
Java
React Native
Flutter
.NET MAUI
Frameworks and libraries
Spring (Java)
Spring Boot (Java)
Django (Python)
Flask (Python)
ASP.NET (C#)
Ruby On Rails (Ruby)
React
Angular
Vue.js
Cloud services
AWS
Microsoft
Google Cloud Platform
Heroku
Red Hat OpenShift
Database systems
PostgreSQL
MySQL
MSSQL
MongoDB
ElasticSearch
Redis
Cassandra
ClickHouse
Oracle
Flyway
LiquiBase
Neo4j
Tarantool
Teradata
CI/CD tools
Jenkins
GitLab CI/CD
GitHub Actions
DevOps tools
Docker
Kubernetes
Terraform
Ansible
Puppet
API tools
RESTful APIs
GraphQL
GRPC
Swagger/OpenAPI
Amazon SageMaker
Azure Machine Learning
Catboost
Google AI Platform
Google Cloud AutoML
Keras
LightGMB
PyTorch
TensorFlow
XGBoost
Pandas
scikit-learn
In London? So are we
We’d be delighted to meet you in person or talk online to discuss your modernisation needs.
Churchill Place
London E14 5RE, UK
FAQs
What are the key factors influencing the costs of legacy app modernisation services?
The investment required for legacy app modernisation typically ranges from £30K to £110K or more. The final cost depends on several factors, including the complexity of your application, the chosen approach, the volume of data migration, and the size and expertise of the team involved.
Contact our team and share a few details about your software to get a ballpark estimation for your modernisation project.
How can Vention eliminate or minimise operational downtime during app modernisation?
Being a legacy software modernisation company, Vention follows a multi-faceted approach to ensure the continuity of your business throughout the modernisation process.
- Modernise your application piece by piece, directing traffic gradually to new components and/or keep your old and new environments running in parallel, routing traffic to the new one only after testing and validating its stability and performance.
- Implement CI/CD pipelines to automate builds, testing, and deployments, reducing human error and shortening rollback times if issues arise.
- Set up proactive monitoring to detect issues early and trigger rollback if needed.
- Perform necessary downtime activities during low-traffic windows.
Do you use AI or automation in the modernisation process?
Only with a client’s consent, our team utilises approved AI tools that help our application modernisation experts do more in less time, while ensuring the quality of the work we do and the security of our clients’ data.