N 41°54′ · FULL-STACK DEVELOPMENT FIRM
Software worth
the voyage.
GrandLine Solutions is a full-stack development firm. Custom applications that run businesses, CRMs, SaaS platforms, AI and multi-agent systems, security and just-in-time access platforms, cloud hosting — designed, built, and operated across web, mobile, and desktop. If you can dream it, we deliver it.
§ 01 — SERVICES
What we build and run
01
Custom Application Development
The software that runs your business — web, mobile, and desktop.
02
CRM & Business Platforms
A CRM built around how you actually sell and serve.
03
SaaS Platform Development
Multi-tenant platforms, built by people who run one.
04
AI & Multi-Agent Solutions
Custom agents and AI features that survive contact with production.
05
Security & Access Platforms
Least-privilege by design. Access granted just in time — not forever.
06
Cloud Hosting & Infrastructure
Terraform-first Google Cloud, run by people who live there.
07
Project Delivery
Discovery → design → build → launch → operate.
08
Partnered Agreements & Retainers
A full-stack engineering partner on your side, month after month.
§ 02 — FLAGSHIP PROOF
FitTrainr — a multi-tenant SaaS we built, run, and grow
A complete coaching platform for fitness professionals: client apps, coach and organization portals, payments and subscriptions, AI-assisted planning, iOS and Android apps, and a Terraform-driven GCP estate with fully automated CI/CD. Not a prototype — a production business we operate every day. This is the experience every engagement inherits.
- Surfaces
- 4 portals + 2 mobile apps
- Payments
- Stripe & PayPal live
- AI features
- Guardrailed Gemini
- Delivery
- Push → CI → deploy
§ 03 — HOW WE WORK
One route, five legs
LEG 01
Discovery
Requirements, risks, a costed plan
LEG 02
Design
Flows, data models, architecture
LEG 03
Build
Weekly ships, demo checkpoints
LEG 04
Launch
Domains, stores, observability
LEG 05
Operate
SRE, cost reviews, iteration
Tell us what you want built.
If you can dream it, we deliver it. Ten minutes on the work-request form; a considered reply from the engineers who will build it — not a sales sequence.
Start a work request