Modernisation and migration, Kraków Poland

01Our legacy systems and app migration services

Your legacy systems shouldn’t be a roadblock. We help businesses move forward by modernizing outdated applications, ensuring they stay efficient, scalable, and secure. Whether it’s refactoring old React Native code, upgrading a monolithic backend to microservices, or transitioning from a PHP system to a high-performance Node.js solution, we handle migrations with precision. Our approach isn’t just about rewriting code—it’s about designing seamless transitions that keep your operations running smoothly. No downtime, no disruptions—just progress.

From cloud migrations to CI/CD pipeline optimization, we create resilient, future-ready architectures. Our DevOps experts build orchestrator services that maintain data integrity during transitions, while our cloud specialists leverage Kubernetes and scalable databases to ensure your infrastructure is prepared for growth. Need a thorough audit before making changes? We assess your software’s performance, security, and UX to identify bottlenecks and opportunities. Modernization isn’t just an upgrade—it’s a strategy for long-term success, and we’re here to make it happen.

Modernisation

Is your codebase stuck in the past? We specialize in breathing new life into outdated systems, transforming them into modern, efficient solutions. Whether it’s updating an old React Native project or transitioning your Node.js backend from Express to the more robust and structured NestJS, we surely can help you out.

But that’s not all. We also upgrade websites, replacing vulnerable platforms like WordPress with cutting-edge technologies like React or Next.js. The result? Faster, safer, and future-ready systems that align with your business needs.

Migration

We specialize in bringing "back to life" legacy code by migrating it to modern, robust technologies like Node.js or React.js. Over the years, we’ve successfully guided clients through seamless transitions—from PHP to Node.js, Java to Node.js, monoliths to microservices, and even the reverse when it made sense. Our team doesn’t just rewrite code; we build smart bridges and orchestrator services that ensure your current system keeps running smoothly while the transformation unfolds. It’s a balance of stability and progress, tailored to your needs.

Orchestration during migration

Our DevOps and senior development team will design and implement all the necessary orchestrator services to ensure your data remains consistent throughout the transition. We understand that migrations can be a delicate process, fraught with challenges. That’s why we leave nothing to chance. Every system, every dependency—handled with precision.

Our team carefully maps out workflows to ensure all systems remain in sync, even during complex data movements. You can trust us to minimize downtime while safeguarding the integrity of your data. Forget about disruptions or messy rollbacks. We’ve got this.

With years of experience under our belts, we know what it takes to make your migration seamless. And we won’t just stop at ensuring data consistency—we’ll provide you with a smooth, future-ready infrastructure to grow upon.

Cloud migration

Struggling to scale your infrastructure? No problem - we can help! Our team specializes in seamless cloud deployments, utilizing Kubernetes (K8s) and other cutting-edge solutions to transform your architecture into a scalable powerhouse. Whether it’s modernizing your application or rethinking your infrastructure, we ensure the migration process is smooth and efficient. Beyond that, our deep expertise in scalable databases allows us to optimize your data for both speed and security, so you’re ready to handle whatever comes next. Let us help you grow without limits.

CI/CD process

Stability is non-negotiable. Every core solution must be reliable, but it also needs flexibility—a seamless way to deploy changes or roll back when necessary. That’s where we excel. Our team specializes in building and refining CI/CD processes that work for your unique setup.

Whether you’re starting from scratch or improving an existing cloud infrastructure, we can design robust pipelines for automated deployment, rigorous testing, app builds, and even streamlined app store submissions. Need dynamic environments for your developers or QA teams? We’ve got you covered. By optimizing your CI/CD process, we don’t just save you time; we make your workflows smarter, your costs leaner, and your releases smoother.

UX/UI audits

The UI and UX landscape is always shifting, keeping pace with new trends, technologies, and user expectations. What worked perfectly two years ago might now feel outdated or even frustrate users. That’s where we step in. We’ll thoroughly analyze your frontend solutions to ensure they are effective, seamless, and user-friendly. Are there design bottlenecks causing frustration? Missed opportunities to engage users? We uncover issues, enhance UX, and pinpoint ways to increase your conversions. Let’s make your digital experience as impactful as it should be.

Software audits

Is your software feeling outdated? Sluggish? It’s not uncommon. In today’s fast-paced tech landscape, systems can quickly fall behind. That’s where we step in. Our team will thoroughly audit your codebase, evaluate your architecture, and analyze your processes. We’ll identify what’s holding you back and provide actionable steps to not just keep up but, in most cases, leap ahead of the competition. Let’s future-proof your technology together.

02Modernisation and migration process

Analysis

audits / migration - modernisation scope / choose tools / evaluate time and cost

Code & tools preparation

prepare source / tests / POCs / plan orchestration / adapt the CI/CD / choose tools

Migration & modernisation

develop / migrate DBs / sync the data

Testing

verify data integrity / QA / automated tests

Deploy & launch

cross-browser compatibility & screen resolution tests / code optimization / approvals

Maintenance

keep the code updated / monitoring / new features and improvements

Analysis

Prepare code and data

Select approach & tools

Migration & modernisation

Testing

Deploy & launch

Maintenance

Analysis is where everything begins. Before diving into the migration process, we take a deep dive into the project’s scope, identifying unique challenges and opportunities, running various audits. Being specialists in JavaScript technologies, we excel at migrations where the end solution is built entirely in JS. Whether it’s React, Node.js, or advanced frameworks like Next.js and Nest.js, we know how to leverage these tools to their fullest potential. Choosing the right technologies is critical, and we carefully assess the available options to ensure they align seamlessly with your vision. Time and cost matter too. We craft precise estimates, considering every detail to create a plan that’s efficient yet realistic. By the end of this phase, you’ll have a roadmap that prioritizes innovation, fits your budget, and guarantees a smooth transition into a modern, JavaScript-driven future.

03Our latest modernisation and migration projects

Reduce management time and costs

Improve functionality

Reducing IT management time and costs is a key benefit of modernising legacy applications. By upgrading outdated systems, you can eliminate inefficiencies and streamline workflows, allowing your team to focus on more strategic tasks rather than spending time managing cumbersome, legacy software. With modernized, scalable solutions, you’re not only cutting down on maintenance costs but also future-proofing your infrastructure. This means fewer manual updates, less troubleshooting, and a significant reduction in the time spent on day-to-day system management. The result? A more agile and efficient IT environment, where resources are used effectively, and operations run smoothly.

At our company, we specialize in JavaScript frameworks like React, Node.js, Next.js, and Nest.js, making us particularly well-equipped to modernize your legacy applications using these powerful tools. By embracing personalized legacy application modernisation services, you gain the opportunity to innovate without the burden of outdated technology holding you back. Modernisation opens the door to new features, enhanced security, and improved user experiences, all while reducing the risks associated with using old systems. The shift to scalable software solutions means you can grow and adapt with ease, without worrying about your infrastructure slowing you down. Ultimately, modernizing your legacy applications is not just about reducing costs—it’s about unlocking new potential, driving innovation, and positioning your business for long-term success in a rapidly evolving digital landscape.

Improving functionality through modernisation is about more than just keeping up—it’s about setting your software up for future success. Upgrading your app with a better UX/UI improves the overall user experience, making it more intuitive, faster, and visually appealing. With modern JavaScript frameworks like React and Next.js, we ensure that your app’s interface is responsive, fluid, and meets the expectations of today’s tech-savvy users. Cloud integration is another key upgrade, allowing your application to scale effortlessly while reducing infrastructure costs. This ensures that your system can handle increased demand without sacrificing performance. Moreover, adopting a scalable microservice architecture breaks down your application into manageable, independently deployable units, making it easier to update, maintain, and scale over time.

Modernisation prepares your app to not only survive but thrive in a rapidly changing market. By embracing the latest technologies, we future-proof your system, allowing you to quickly adapt and introduce new features as customer needs evolve. This approach keeps your software competitive, enabling you to stay ahead of trends and leverage the latest innovations in cloud and software development. At the heart of it, modernization isn’t just about technology—it’s about creating a foundation that supports continuous growth and innovation. With our expertise in JavaScript frameworks, we help ensure that your migration and modersization journey sets you up for long-term success.

04FAQ

What types of companies do we usually work with?

Are the migration / modernisation consultations free?

What’s the standard length of the migration project?

What’s the standard length of the modernisation project?

What team works on my migration/modernisation development?

What happens if I am not satisfied at any of the steps of the migration/modernisation process?

Need help migrating your legacy code to Node?

Do you also migrate other backend languages to Node?

Can you help me modernise my existing application into a scalable microservice architecture?

Can you modernize my legacy mobile app?

05Recent posts

06Our clients

They’ve already trusted us.

07Testimonials

Dev and Deliver have become our trusted partner during the development of recruitment platform GigPlug! We have really valued their technology insight, expertise and professionalism during the tech build process, and they always exceed expectations to help our business. We also enjoy working with Michal, our Dev and Deliver PM!

Elaine Relihan, GigPlug / Co-Founder and CEO

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Legacy app and code migration specialists from Kraków, Poland

(+48) 789 188 353

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hi@devanddeliver.com