Legacy App Modernization Consulting

Eliminate tech debt, accelerate growth

Confront your architectural limitations under expert guidance and transform outdated code into a secure, agile foundation for business growth.

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Legacy App Modernization ConsultingLegacy App Modernization Consulting
TUI
Empik Go
Diagnostyka
Dolby
Skyscanner
BNP Paribas

When you need legacy platform modernization

Maintaining outdated systems generates hidden operational costs and paralyzes daily business execution. When your existing infrastructure becomes a bottleneck for expansion, the time has come for a technological breakthrough.

01

When technical debt paralyzes you

Every attempt to deploy a new feature requires touching complex code that nobody fully understands. Compounding architectural compromises grow into a pressing business problem, drastically inflating the cost of operational changes. This accumulation eventually leads to a complete freeze where any innovation breaks existing functionality.

02

When you risk security reputation

Outdated core software opens dangerous vulnerabilities for cybercriminals and exposes critical corporate platforms to sudden, catastrophic downtime. A failure within a central API Gateway point or minor access configuration errors can abruptly disconnect users from services. Even worse, unsecured legacy networks can compromise connected partner systems.

03

When mobile revenue falls flat

Architectures built a decade ago cannot scale to handle millions of active concurrent users accessing your mobile application simultaneously. Rigid frameworks prevent you from leveraging telemetry data or safely integrating modern LLM models. Consequently, you lose out on 24/7 direct client connectivity and cost-saving process automation.

04

When integrations block daily operations

Rendering a single application screen requires pulling data across dozens of restrictive backends, meaning a glitch in one disrupts the entire user interface. Relying on an ESB integration layer forces multiple engineering teams to coordinate for minor updates, delaying data synchronization. Disconnected backend systems present clients with outdated information.

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How we build your modern platform

We guide your enterprise through a complete structural transformation without disrupting ongoing commercial windows or sales performance. We take full responsibility for your codebase from day one to eliminate deployment downtime.

Rapid technical assessment

In the first two weeks, we conduct a structured review of your architecture, dependencies, crash patterns, and CI/CD maturity across iOS and Android. We identify exactly what is driving operational risk, what blocks delivery, and what components can be stabilized immediately.

Mitigation and modernization plan

We deliver a prioritized roadmap aligned tightly to business risk and delivery continuity, rather than a theoretical ideal architecture. You will know what needs to happen in the next 90 days, what can wait, and the exact cost of inaction for each milestone.

Code stabilization

We address high-risk issues first, cleaning up dependencies, resolving critical crash sources, and optimizing build pipelines. Our team embeds AI-assisted workflows into your CI/CD process, including automated test generation for critical paths (payments, onboarding) and automated code reviews.

Modernization delivery

We execute the system rebuild or architectural migration incrementally, ensuring absolute operational continuity for your users throughout the process. Engineering choices – whether Flutter, Kotlin Multiplatform, or native iOS and Android – are made based on your long-term ownership model.

Governance and handover

We establish clear, independent ownership of critical areas: mobile applications, backend contracts, CI/CD pipelines, and release procedures. Every new version rollout gets a defined business owner, a precise rollback plan, and dedicated automated monitoring scope.

Your ROI from our modernization

<strong>Configuration-driven business scaling</strong>

Configuration-driven business scaling

Turn international expansion into a plug-and-play process. Launching your application services in a new country shifts from months of custom coding into a few days of simple content configuration.

<strong>Transition from monolith to microservices</strong>

Transition from monolith to microservices

Break down sluggish, overloaded monolith architectures into domain-specific microservices. This decoupling allows you to scale high-traffic backend sections independently under heavy global user loads.

<strong>Parallel automated CI/CD tracks</strong>

Parallel automated CI/CD tracks

Separate your engineering deployment tracks completely. Daily consumer-facing features flow smoothly on one automated pipeline while another track advances core architectural modernization with zero deployment downtime.

<strong>Opaque black box risk reduction</strong>

Opaque black box risk reduction

Replace ancient, reactive legacy legacy frameworks with transparent, highly observable modern data structures. This upgrade eliminates corporate compliance risks and sharply reduces manual evaluation costs.

<strong>Eliminating single points of knowledge failure</strong>

Eliminating single points of knowledge failure

Establish complete technical documentation and embed automated AI-driven engineering workflows. This structural clarity safeguards your business delivery from disruption if a critical engineer leaves your team.

<strong>Configuration-driven business scaling</strong>

Configuration-driven business scaling

Turn international expansion into a plug-and-play process. Launching your application services in a new country shifts from months of custom coding into a few days of simple content configuration.

<strong>Transition from monolith to microservices</strong>

Transition from monolith to microservices

Break down sluggish, overloaded monolith architectures into domain-specific microservices. This decoupling allows you to scale high-traffic backend sections independently under heavy global user loads.

<strong>Parallel automated CI/CD tracks</strong>

Parallel automated CI/CD tracks

Separate your engineering deployment tracks completely. Daily consumer-facing features flow smoothly on one automated pipeline while another track advances core architectural modernization with zero deployment downtime.

<strong>Opaque black box risk reduction</strong>

Opaque black box risk reduction

Replace ancient, reactive legacy legacy frameworks with transparent, highly observable modern data structures. This upgrade eliminates corporate compliance risks and sharply reduces manual evaluation costs.

<strong>Eliminating single points of knowledge failure</strong>

Eliminating single points of knowledge failure

Establish complete technical documentation and embed automated AI-driven engineering workflows. This structural clarity safeguards your business delivery from disruption if a critical engineer leaves your team.

play quote
"They are a business partner that we feel like we can 100% rely on."

Maciej Matenko

IT Technical Leader, Play

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Available for projects

Carrying technical debt that slows every release?

Book a diagnostic call. We will scope a rapid technical assessment based on your current platform and tell you exactly what we look at before we start.

Frequently Asked Questions

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What are the common signs that my business needs app modernization?

When feature deployment drastically slows down, costs skyrocket, and basic updates break existing functionality, your infrastructure has hit its limit. Partnering with an experienced legacy mobile app modernization development firm helps you uncover hidden architectural bottlenecks, clear out accumulated technical debt, and restore your release velocity.

Will modernization cause major business disruptions or downtime?

No, a proper modernization process preserves complete business continuity. As a trusted legacy mobile app modernization design consultancy, we implement specialized facade layers and parallel CI/CD tracks to safely update core components "mid-flight" while your active systems continue to generate revenue uninterrupted.

Should we refactor or rewrite our app?

It depends on what an audit of your current code and architecture shows. Refactoring keeps the parts that work and improves them step by step. A rewrite replaces code whose architecture blocks further development. In the first two weeks, we review your architecture and show what needs to happen in the next 90 days. Either way, the rebuild or migration runs incrementally. At FoodNotify, replacing non-standard implementations with proven open-source Flutter solutions significantly improved app stability.

Can you take over an app another vendor built, even with little documentation?

Yes, including apps with little or no documentation. We start with a structured review of the architecture, dependencies, and release process, so we learn the system from the code itself. We then establish complete technical documentation, so your delivery no longer depends on a single engineer. When Dolby's previous vendor became unavailable, we took over the Dolby On app and shipped the first release in 2 months.

Will modernization cause downtime or stop our roadmap?

No. Your roadmap continues while the system is modernized. Daily consumer-facing features keep flowing through one automated pipeline, while the modernization runs on a parallel CI/CD track. Deployments run with zero downtime, and each release gets its own automated monitoring scope. For Herbalife, we split the legacy backend into 16 cloud microservices and launched three connected apps across 56 countries.

Will we depend on Miquido after modernization?

No. Modernization ends with complete technical documentation and clear, independent ownership of critical areas, so knowledge doesn't sit with one vendor or one engineer. After that, you can keep us for mobile app maintenance or run the app in-house. For Orlen, we redesigned the CI/CD pipeline and gave the internal team full ownership of build and release infrastructure.

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