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Legacy System Modernization

Modernize the system. Don't stop the business. A staged path from the system you depend on to the system you need — without betting the business on a rewrite.

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When legacy becomes the constraint

  • Changes take months in a system built for another decade

    Every new feature fights fifteen years of accumulated decisions. Delivery slows down while the market doesn't.

  • The people who understood it are leaving

    Critical business logic lives in undocumented code and two engineers' memory. Every departure raises the stakes.

  • New partners can't connect to old rails

    Modern APIs, instant payments, IoT platforms, NDC channels — the integrations your business needs weren't imaginable when the system was designed.

  • Running it is getting riskier and more expensive

    Unsupported platforms, unpatchable dependencies, rising infrastructure costs — the price of standing still compounds quietly.

  • The system now decides your strategy, not the other way around

    Products you can't launch, markets you can't enter, deals you can't support — when architecture dictates the roadmap, it's no longer a technical problem.
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Modernization without the big bang

UNDERSTAND

The system mapped before anything is touched.

  • Architecture, dependencies & data flows documented
  • Embedded business logic extracted and preserved
  • AI-assisted code analysis for undocumented systems
  • Risks ranked: what to move first, what to leave alone

MODERNIZE

Piece by piece — never all at once.

  • Incremental replacement of components in priority order
  • Refactor, replatform, or rebuild — decided per component
  • Cloud migration where it pays, not by default
  • The legacy system keeps running throughout

MIGRATE & PROVE

New systems earn trust before they take over.

  • Data migration with integrity checks at every step
  • Old and new running in parallel, results compared
  • Staged cutover with a tested rollback path
  • No switch until the new system proves itself in production

CONTINUITY

Operations never pause for modernization. Bookings keep processing, vessels keep reporting, payments keep clearing — while the system changes underneath. action plan your team can execute on Monday.

  • Zero-downtime migration strategies
  • Business-critical flows protected first
  • Team trained on the new system before cutover
  • Support & evolution after modernization — same team, full context

Key stages of legacy modernization

  1. Audit & System mapping
    Stage 01

    Audit & System mapping

    Architecture, code, and data flows assessed and documented — the same discipline as a standalone technical audit, applied as the foundation.
  2. Modernization strategy
    Stage 02

    Modernization strategy

    Refactor, replatform, or rebuild — decided per component, with cost, risk, and business value made explicit before commitment.
  3. Foundation & First component
    Stage 03

    Foundation & First component

    Modern infrastructure set up alongside the legacy system. The first component chosen for maximum learning at minimum risk.
  4. Incremental replacement
    Stage 04

    Incremental replacement

    Components migrated in priority order. Each release shrinks the legacy footprint while the business runs uninterrupted.
  5. Data migration & Parallel run
    Stage 05

    Data migration & Parallel run

    Data moved with integrity verification. Old and new systems run side by side until results match — consistently.
  6. Cutover & Evolution
    Stage 06

    Cutover & Evolution

    Staged switchover with rollback ready. Then: monitoring, support, and a system that can finally keep pace with the roadmap.
Audit & System mapping
Stage 01

Audit & System mapping

Architecture, code, and data flows assessed and documented — the same discipline as a standalone technical audit, applied as the foundation.

Start with a conversation

Whether you're weighing modernization options, planning growth your current system can't support, or already know what needs to change — the first step is the same: an honest look at where the system stands and the safest path forward.

What modernization unlocks in your industry

Legacy looks different in a booking engine, a vessel ERP, a core banking system, and a SCADA network — and so does the path out.

Travel & Hospitality

  • Monolithic PMS/CRS decomposed without stopping bookings
  • GDS-era systems extended to NDC & modern retailing channels
  • Booking engines re-architected for peak-load resilience
  • Payment stacks upgraded to current rails & standards
  • Customer data unified from fragmented legacy silos
Learn more
TravelTech

Maritime & Logistics

  • Vessel & fleet ERPs moved off unsupported platforms
  • Office–vessel sync rebuilt for unreliable connectivity
  • Paper and spreadsheet workflows absorbed into systems
  • Legacy systems opened up for IoT & telemetry integration
  • Emissions data collection modernized for reporting demands (IMO, FuelEU)
Learn more
Maritime & Logistics

Energy & Mining

  • SCADA & OT systems bridged to modern IT — safely, in stages
  • Field data flows digitized from manual collection
  • Monitoring platforms consolidated from fragmented tools
  • Historical asset data unlocked from legacy formats
  • ESG & emissions reporting built on modernized data pipelines
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Oil & Gas / Mining

Finance & Banking

  • Core system modernization with transaction integrity preserved
  • Batch-era processing evolved toward instant payment expectations
  • Compliance workflows moved from manual patches to built-in logic
  • Legacy APIs restructured for open banking connectivity
  • Reconciliation & reporting rebuilt on reliable data foundations
Learn more
FinTech

Case studies

Take a look at cases delivered by our teams to get a clearer picture of how your business can benefit from the services we offer.

View all cases
Intergaz

LPG Supplier Ecosystem

Multi-app ecosystem for Latvia's largest LPG supplier: customer portal, delivery, service and CRM with payments, telemetry and billing.

Energy
Logistics
CRM
IoT Platform
Web App
Read more
Smart diesel fuel tank with telemetry sensors on a construction site at sunrise, surrounded by excavators and dump trucks

Fuel Management Platform

Fuel management system for construction sites: smart tanks with telemetry, driver access cards, automated fuel tracking, invoicing, and unauthorized use prevention.

Energy
Logistics
IoT Platform
Web App
Read more
Marine Fields IoT fleet management and vessel optimization software development case study by AKDev Group.

Fleet Monitoring Platform

Bespoke IoT platform with sensor-based alerts, real-time vessel tracking, and modular 3D deck analytics.

Maritime
IoT Platform
SaaS
Read more
Case Studies
Take a look at cases delivered by our teams to get a clearer picture of how your business can benefit from the services we offer.
All Cases
Airline Ticket Platform
Travel tech

Booking engine, website and custom CRM for a US business-class flight reseller: ticket search and comparison, itinerary maps, GDS integration.

view project
Online School Builder
EdTech

SaaS platform for educators and institutions to launch their own online schools: course creation with a block-style editor, live lessons, homework and exams, and student management.

view project
Global Payments Platform
FinTech

FinTech-as-a-service platform for freelancers and business: invoicing, global payments, multi-currency payouts and debit cards.

view project
Banking Support Platform
FinTech

High-load customer support platform for a bank: real-time WebSocket chat between clients and operators, request ranking and guaranteed message delivery.

view project
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