Web Application Redesign and Migration

Code, low code, no code, APIs, generative AI

Put your tools back at the service of your teams, your customers and your business ambitions.

Many companies find themselves slowed down or even blocked by obsolete, poorly maintained or technically blocking web applications. Discover how to transform these obstacles into opportunities.

Free strategic session (30 minutes)

Why redesign or migrate a web application?

Redesigning or migrating a web application is not just a technical choice, it's a strategic lever. In a rapidly evolving digital environment, applications age quickly: technical debt, obsolete interfaces, slowdowns, weakened security, evolution difficulties... These obstacles slow down your growth and weaken your competitiveness.

At GDN, we see each redesign as an opportunity to put the user, business use cases and performance back at the heart of the product. Migrating, modernizing or redesigning a web application means giving value back to your digital assets.

Our approach? Pragmatic and agile. We analyze your real needs, weigh up the appropriate technologies and always prioritize the solution that moves you forward quickly. Test, adjust, evolve: your tools grow at the speed of your ambitions.

When should you consider a redesign or migration?

Here are some signals that indicate a redesign is becoming urgent or a migration is necessary:

  • You need to streamline, open up and accelerate responses to your company's business needs
  • Your application is slow, unstable or non-responsive
  • Your users can no longer find their way around or abandon during the process
  • Your current technologies no longer allow easy evolution
  • You are dependent on an obsolete provider or framework
  • Your application no longer reflects your activity, your image or your processes
  • You are multiplying patches, without solving underlying problems

Our approaches: redesign, migration, refactoring, rebuild...

We always choose the approach best suited to your objectives, your budget, and your technical context. Among the approaches we practice:

  • Replatforming / Migration: changing hosting, moving to the cloud or migrating to a more stable environment without complete functional redesign.
  • Refactoring: optimizing existing without breaking everything: code, architecture, integration.
  • Rebuild from scratch: starting from a blank sheet based on modern architecture.
  • Progressive Redesign: iterative redesign by modules, without brutal stopping of the existing.

Each strategy can include code modernization, microservices breakdown, APIification, UI/UX redesign, etc...

Concrete benefits for your business

A well-conducted redesign or migration can generate immediate and lasting benefits

Maximized business value and strategic agility

  • Business reactivity: Ability to respond in weeks rather than months to new business needs
  • Organizational fluidity: Elimination of bottlenecks, simplified processes, enhanced collaboration between teams
  • Ecosystem openness: Open APIs enabling rapid integration of new partners and services
  • Decision acceleration: Real-time data, executive dashboards, KPI-driven management
  • Measurable productivity gains: 40-60% reduction in time-to-market, automation of 70% of repetitive tasks
  • Exceeding objectives: Perfect tech/business alignment, accelerated product roadmap, ROI above forecasts

Improved user experience

  • Fluidity: Intuitive navigation, optimized journeys, reduced conversion steps
  • Accessibility: WCAG compliance, multi-device support, inclusive ergonomics
  • Responsiveness: Automatic mobile/desktop adaptation, optimized response times
  • Measurable impact: Decreased bounce rate, increased session time, improved customer satisfaction

Optimized technical performance

  • Loading times: Pages 3x faster, resource optimization, intelligent caching
  • Reliability: Reduced failures, proactive monitoring, high availability (99.9%+)
  • Scalability: Ability to absorb load peaks, elastic architecture, controlled growth
  • Business impact: Fewer customer losses due to slowdowns, better SEO ranking

Significant cost reduction

  • Simplified maintenance: Modern and documented code, reduced emergency interventions
  • Fewer incidents: Robust architecture, automated testing, bug prevention
  • Operational efficiency: Automation of repetitive tasks, less user support
  • Measurable ROI: Savings of 30-50% on annual maintenance costs

Enhanced compliance and security

  • GDPR: Consent management, right to be forgotten, data portability
  • Traceability: Detailed logs, audit trail, modification history
  • Access control: Strong authentication, role management, SSO
  • Advanced protection: Encryption, automatic backup, business continuity plans

Better data exploitation

  • Centralization: Unified customer data view, real-time synchronization
  • Dashboards: Business dashboards, custom KPIs, automatic alerts
  • Export and integration: Open APIs, BI connectors, CRM/ERP synchronization
  • Business intelligence: Advanced analytics, predictions, decision support

Business acceleration

  • New use cases: Innovative business features, optimized workflows, enhanced collaboration
  • Online sales: Integrated e-commerce, secure payment, order management
  • Automation: Digitized business processes, reduction of manual tasks
  • Time-to-market: Rapid deployment of new features, adaptation to market changes

Modernize without starting from scratch: our target architectures

Each project is an opportunity to evolve your stack towards more robustness, modularity and agility:

  • Microservices architecture: functional breakdown, module autonomy, facilitated maintenance
  • Modular applications: back-offices, customer portals, interconnected dashboards
  • Headless / API-first front-end: fluid integration with your tools, website, mobile or ERP
  • Single Page Applications (SPA) or Progressive Web Apps (PWA): fluid and modern experience

Security, performance, scalability

Redesigning or migrating an application is also an opportunity to adopt high standards of security and performance. At GDN, we integrate from design:

  • Vulnerability prevention strategies (OWASP, input control, roles)
  • Automated and remote backups, tested regularly
  • A scalable approach (cloud auto-scaling, CDN, message queues...)
  • A modular architecture to facilitate future developments

FAQ - Web Application Redesign and Migration

Here are the answers to the most frequently asked questions our clients have before launching a redesign or migration project.

A redesign consists of modernizing the interface and/or architecture of an existing application. A migration aims to move the application to a new environment (cloud, other technology, new server). A rebuild means starting from scratch with a new technical foundation while taking back the key functionalities.

In most cases, it's possible. About one project out of two can be redesigned and put into production without service interruption at the time of switchover. This depends on the complexity of the existing system, technical dependencies, functional scope and the specific advantages/disadvantages of your context during a switchover without service interruption.

We implement different strategies such as modular breakdown, parallel environments, feature toggling or progressive switchovers to maintain business continuity and limit risks during deployment.

Your data history is preserved and migrated securely. We set up synchronization scripts and data migration plans to avoid any loss or alteration during the transition.

It depends on the complexity of your application and its scope. On average, a redesign project lasts between 3 and 6 months, including the audit, design, development, testing and production phases.

Absolutely. We systematically integrate UX/UI reflection into our redesigns, with user workshops, mockups, and journey testing to guarantee a modern, intuitive and accessible interface.
Design, development and maintenance of applications

Trusted by SMEs and mid-market companies since 2006