Modern software without losing your history
Legacy Software Modernization.
Turn legacy business logic and data into a documented, maintainable system with a modern user experience.
For organizations depending on old databases, spreadsheets, Access or FileMaker systems.
Custom fixed-fee proposals follow technical discovery. No third-party API capability is guaranteed before verification.
The business challenge
Where the friction starts.
Critical operations depend on one aging computer, undocumented scripts or a database that only a few people understand.
The FMG approach
Build the missing layer.
We inventory the old system, document its data and business rules, then phase migration into a new repository with tests and rollback plans.
What your software could include
Purpose-built modules.
These are candidate modules for discovery, not a statement that every module is included at one price. We agree on business rules, data sources and permissions before implementation.
Business rules and workflow mapping
Staged import and validation
New application with audit trails
How it might work
One connected workflow.
A legacy customer and invoice dataset is exported, mapped to stable IDs, imported to a validated staging database and checked before cutover.
Illustrative process only. Data freshness, provider capabilities and authorization are verified during discovery.
Business outcomes we're designing for
- Less dependence on undocumented legacy systems
- Better ability to evolve the code
- A measurable migration with reconciliation
Potential integration ecosystem
Connect the tools you already use.
Airtable
Data workspaces
Use careful mapping, pagination and rate limits
Provider docsQuickBooks Online
Accounting
Accounting is authoritative for its own books
Provider docsSalesforce
CRM
Validate org edition, API entitlements and required object scopes
Provider docsService Fusion
Field service
Customer, job, technician, estimate and other documented resources
Provider docsNo platform partnership or completed integration is implied. Some functions may only be possible with an eligible plan, approved OAuth scopes, a partner program or a read-only connector.
Source ownership
A repository you can keep building.
We scope a private, client-controlled GitHub repository with modular frontend components, tested API adapters, environment templates, documentation and a deployment pipeline.
Design, code and handoff rights are explicitly defined in the agreement. FMG does not claim ownership of third-party SaaS APIs, hosted checkouts, accounting records or software licenses.
Security, backups, access controls, incident response, data retention and maintenance responsibilities are documented for the real production system.
Answers before you commit
Common questions.
Can every legacy system be migrated automatically?
Not reliably. File formats, access rights, attachments, calculations and embedded scripts require inspection. We reconcile record counts and test business rules before signing off on a migration.
Who owns this software after launch?
Ownership of custom code, documentation and related deliverables is defined in the project agreement. FMG typically plans for a client-controlled private GitHub repository and client-owned deployment accounts. Licensed platforms and third-party APIs remain governed by their vendors.
Related software solutions.
FMG Software in a Box
Build it around your business.
Bring your current systems, pain points and goals. We'll map a realistic project scope and the parts your team can own.
Start your software project