Problem
Core systems are hard to change, poorly documented, and expensive to staff. A full rewrite is politically attractive and operationally dangerous. Meanwhile, AI and new products cannot land on a brittle estate.
Incremental modernization
Modernize without unnecessarily rewriting everything.
GillTech AI modernizes applications, APIs, databases, and architecture in controlled increments so operations keep running while the platform becomes easier to change. Modernize without unnecessary disruption.
Solution
The company assesses the system, maps architecture, adds characterization tests, and modernizes behind stable interfaces. Cloud, APIs, and observability are introduced where they reduce risk — not as a fashion project.
Capabilities
- Legacy application assessment
- Architecture mapping
- Monolith decomposition
- API modernization
- Database modernization
- Cloud migration
- Test generation
- Characterization Tests
- Documentation
- Performance optimization
- Observability
- Incremental (strangler-fig) migration
Use cases
Extracting a stable API from a monolith so new products can integrate safely
Moving a critical workload to a cloud-native runtime in stages
Replacing a fragile batch job with an observable service
Preparing a legacy estate so AI and automation can call real business operations
Architecture
- Legacy System
- Assess
- Map
- Test
- Modernize
- Integrate
- Scale
Delivery approach
Characterize behaviour with tests before changing it. Wrap or strangle the old system rather than switching it off. Deliver vertical slices that can go to production. Keep rollback paths. Document as the map is proven, not as a separate novel.
Technology
APIs
PostgreSQL / MySQL
Docker
CI/CD
Automated tests
Observability
AWS
Outcome
A platform that can accept new features, integrations, and AI workloads with less operational fear — without betting the business on a big-bang cutover.
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Service
Cloud & Distributed Systems
GillTech AI designs cloud-native backends, distributed services, and delivery pipelines that engineering leaders can operate — with enough clarity for business stakeholders to understand the trade-offs.
Service
System Integration
GillTech AI connects applications, APIs, databases, CRMs, ERPs, payments, messaging, and internal services into reliable workflows.
Service
Engineering Productivity
GillTech AI applies AI-assisted development, tests, documentation, and workflow design so teams ship with more consistency — without treating AI as a replacement for engineers.
Industry
Financial Services
Legacy cores that slow product change
Industry
Government & Public Services
Legacy estates and procurement-era systems
Industry
Healthcare
Operational software that is hard to change
Work
Products and illustrative solutions
See GillTech AI products and solution patterns.
Contact
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