Custom software development that adapts to your business
Stop forcing your team to fit a generic system. We design software around your real workflows, integrate with what you already use, and hand over the source code at the end.
Free, with a senior consultant. The plan is yours even if you don't hire us.
Sound familiar?
When the system doesn't adapt to the business, the business ends up adapting to the system — and that costs hours, errors, and opportunities.
- Your team uses parallel Excel sheets because the system doesn't cover everything
- Critical processes happen "outside" the software
- Reports are built manually because dashboards don't help
- You already tried generic software — and it didn't fit
The FSG methodology applied to your project
Diagnosis → discovery → tailored architecture → phased modular development → integration with your current stack → source code handover and training.
Diagnosis and discovery
We map your real workflows into a signed requirements matrix before a single line of code is written.
Tailored architecture
Architecture designed around your operation, enterprise-grade from day one.
Phased modular development
Every module ships with a test plan and signed validation records. You pay only after validating each stage.
Integration with your current stack
We connect the new system to the tools you already use, so data flows without re-entry.
Handover, training, and warranty
You get the source code and a trained team, plus monthly quality reports and a written post-delivery warranty.
Why nearshore Mexico vs. offshore?
For US companies, the right partner is about more than the hourly rate.
- Overlapping business hours with US East and Central — real-time collaboration, not overnight handoffs
- English-speaking project leads
- IP protection under USMCA
- ISO 9001:2015 certified process — pay only after validating each stage
Stack and technologies
What we DON'T do
- We don't sell recurring licenses
- We don't start development without a requirements matrix
- No "we're almost done" — we deliver validated milestones, not promises
Frequently asked questions
Why Four Sides Group
ISO 9001:2015 certified process
Pay only after validating each stage.
Source code 100% yours
No recurring licenses, no vendor lock-in.
Enterprise architecture from day one
Public/private environments and server management included.
+14 years of continuous production
Our oldest system has run without interruption since December 2011.
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The team that built your system keeps it running, with contractual response times and monthly updates.
We connect ERPs, CRMs, custom apps and third-party APIs that didn't talk before.
Remove manual, repetitive, error-prone work with workflows and business rules.