Application Modernisation
Transform Legacy Applications Into Cloud-Native Systems - Without Disrupting Your Business
We help enterprise organisations migrate complex legacy applications to modern, cloud-native architectures using proven patterns including monolith-to-microservices decomposition, the strangler fig pattern, and incremental re-platforming. Every engagement is grounded in a rigorous risk assessment and a phased migration plan that keeps production running throughout.
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The Challenge
Legacy Applications Are Holding Your Business Back
Monolithic architectures built for a different era of computing now impose compounding constraints on every team in your organisation. Deployment cycles measured in months, inability to scale individual capabilities independently, mounting security vulnerabilities in unsupported frameworks, and a shrinking pool of engineers willing to maintain ageing technology stacks are symptoms of a structural problem that cannot be solved by adding more developers to the existing codebase.
Why QuickHire
Why Enterprises Choose QuickHire
Portfolio-Level Assessment
We evaluate every application in your estate against modernisation ROI, business criticality, and technical risk before a single line of code is changed. This prevents the common failure mode of modernising the wrong applications first.
Domain-Driven Decomposition
Our architects use event-storming and bounded-context mapping to identify the correct service boundaries in your domain, producing microservice architectures that are stable, independently deployable, and aligned with your team structure.
Incremental Migration - No Big Bangs
We use the strangler fig pattern, feature flags, and blue-green deployments to migrate production systems incrementally, eliminating the risk of extended downtime and allowing rollback at every stage.
Risk-Managed at Every Stage
Each migration increment is preceded by a risk assessment that identifies data integrity, performance, and availability risks and defines mitigation actions and rollback procedures before work begins.
DevOps and Observability Built In
Modernisation engagements include full CI/CD pipeline construction, infrastructure-as-code, and observability stack deployment so the modernised application is fully operable from day one of production cutover.
Compliance and Governance Continuity
We map every regulatory obligation from the legacy system to the target architecture before migration begins, ensuring that data residency, audit logging, and access control requirements are satisfied at every stage of the transition.
Challenges
Common Enterprise Pain Points
Tight Data Coupling Across Modules
Legacy monoliths frequently share a single database schema across hundreds of modules, making clean service extraction appear impossible. We specialise in database decomposition techniques - including shared database patterns, database per service migration, and event-sourcing for data ownership transfer - that resolve coupling without requiring a full rewrite.
Knowledge Loss From System Age
Applications built over ten to twenty years often have no surviving engineers who understand the original design intent, and documentation is absent or incorrect. Our reverse-engineering capability uses static analysis, runtime instrumentation, and stakeholder interviews to reconstruct a domain model that safely guides the migration.
Integration Dependency Proliferation
Enterprise monoliths accumulate hundreds of point-to-point integrations with other internal and external systems over their lifetime. We conduct integration mapping and introduce an event-driven integration layer or API gateway before decomposition begins, preventing integration chaos during service extraction.
Inadequate Test Coverage
Systems with low automated test coverage cannot be safely refactored because there is no reliable way to confirm that behaviour has been preserved. Our pre-migration work includes characterisation testing to establish a safety net of tests that document current behaviour, giving engineers confidence to make structural changes.
Organisational Resistance to Change
Application modernisation programmes frequently stall not because of technical challenges but because of organisational inertia - teams accustomed to the current architecture resist the process changes that microservices require. We include change management, team topology consulting, and developer enablement workshops as integral components of every engagement.
Our Approach
A Structured, Incremental Modernisation Programme That Delivers Value at Every Stage
Our application modernisation methodology combines rigorous upfront assessment with incremental delivery to ensure that every sprint of the programme produces a usable, production-ready outcome. We do not require a programme completion date before you see value - each extraction, re-platform, or containerisation increment delivers independently deployable capabilities that reduce operational risk and increase business velocity from the moment they are released.
Application Portfolio Assessment
A structured evaluation of your entire application portfolio producing a risk-scored modernisation roadmap with ROI projections, sequencing recommendations, and a total cost of ownership comparison between maintaining the status quo and modernising each application.
Architecture Design and Decomposition Planning
Domain-driven design workshops, bounded context mapping, and architecture decision record production that define the target microservices architecture and the incremental extraction sequence before implementation begins.
Incremental Migration Delivery
Phased delivery of migration increments using the strangler fig pattern, blue-green deployments, and feature flags to maintain production continuity while progressively replacing legacy components with modernised equivalents.
DevOps, Observability, and Knowledge Transfer
Concurrent construction of CI/CD pipelines, infrastructure-as-code, and observability infrastructure, with structured knowledge transfer sessions that leave client engineering teams fully capable of operating and extending the modernised application.
Delivery Models
How We Deliver
A focused discovery engagement that produces a prioritised modernisation roadmap, risk register, and investment case without committing to a full delivery programme.
A fully managed end-to-end programme with a dedicated delivery team responsible for architecture, migration, DevOps, and knowledge transfer throughout the engagement.
A specialist modernisation team embedded alongside your existing engineering organisation, accelerating internal capability while delivering migration increments.
Capabilities
Technical Capability Matrix
Engagement Models
How We Engage
Choose the model that fits your programme governance, budget cycle, and team structure.
Our Process
From Discovery to Delivery
Portfolio Discovery
Week 1We inventory your application portfolio, conduct stakeholder interviews, and run automated code analysis to produce a baseline assessment of each system's modernisation complexity, business value, and risk profile.
Architecture Design
Weeks 2-3Domain-driven design workshops and bounded context mapping produce the target microservices architecture, integration strategy, and data ownership model. Architecture decision records are produced for all major design choices.
Migration Roadmap and Risk Register
Week 4A sequenced, phased migration roadmap is produced with effort estimates, dependency mapping, rollback procedures, and success criteria for each increment. The risk register identifies and mitigates all identified programme risks.
Incremental Migration Delivery
Weeks 5 onwardDelivery squads execute migration increments in two-week sprints, with each increment producing a production-ready, deployable output. Blue-green deployments and feature flags maintain production continuity throughout.
Stabilisation and Knowledge Transfer
Final 4 weeksA structured stabilisation period validates performance, reliability, and compliance of the modernised application under real production load. Knowledge transfer sessions ensure client teams are fully capable of independent operation.
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Security & Compliance
Enterprise-Grade Security by Default
Governance
Programme Governance
Architecture Review Board
A weekly architecture review board includes client technical leadership and our solution architects, reviewing all significant design decisions and ensuring alignment with the agreed target architecture throughout the programme.
Risk and Issue Management
A live risk register is maintained and reviewed at each programme governance checkpoint, with every identified risk tracked through to resolution or acceptance with documented mitigations.
Compliance Traceability Matrix
For regulated industries, a compliance traceability matrix maps every regulatory obligation to its implementation in the target architecture, providing audit evidence for internal and external compliance reviews.
Increment Acceptance Criteria
Each migration increment has documented acceptance criteria covering functional correctness, performance benchmarks, security scanning results, and observability coverage that must be satisfied before production promotion.
Team Structure
Your Enterprise Team
Our application modernisation teams are assembled from specialists with deep experience in both legacy system archaeology and modern cloud-native engineering. Each team is structured to cover the full technical stack required for a modernisation programme - from architecture design through delivery and DevOps - so that no capability gap blocks the programme at any stage.
Project Lifecycle
From Kickoff to Production
Discovery and Assessment
Application portfolio analysis, modernisation scoring matrix, dependency maps, total cost of ownership comparison, preliminary risk register.
Architecture and Design
Target architecture documentation, bounded context map, data ownership model, integration strategy, architecture decision records, sequenced migration roadmap.
Foundation Sprint
CI/CD pipeline, infrastructure-as-code templates, container registry, observability stack, staging environment, characterisation test suite.
Incremental Migration
Production-deployed microservices or re-platformed modules, updated integration layer, database migration scripts, updated runbooks, increment completion reports.
Stabilisation and Handover
Performance validation report, compliance traceability matrix, operations runbooks, knowledge transfer completion, technical debt backlog, programme completion report.
Case Studies
Enterprise Outcomes
A retail bank needed to decompose a fifteen-year-old monolithic core banking application to enable faster product launches and reduce infrastructure costs.
We applied domain-driven design to identify eight bounded contexts and used the strangler fig pattern to extract each as an independent microservice over eighteen months, with zero planned downtime during migration.
A hospital network was operating patient record software on end-of-life infrastructure with growing compliance risk and no path to cloud adoption under the existing architecture.
We re-platformed the application to a containerised Kubernetes deployment on a HIPAA-compliant cloud environment, modernising the database tier with zero-downtime cutover and delivering a new responsive UI.
A national retailer's monolithic e-commerce platform could not scale to handle peak season traffic without costly over-provisioning across the entire application.
We decomposed the product catalogue, inventory, and checkout services into independently scalable microservices, enabling targeted auto-scaling that absorbed peak traffic without full-system over-provisioning.
FAQ
Frequently Asked Questions
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