RoninStack
Your business runs on spreadsheets. Let's fix that.
Custom internal tools and AI automation, built for your team. No jargon, no bloat — just software that works.
Book a callThe way you work today vs. the way you could work
Before
- Spreadsheets everywhere, no single source of truth
- Manual data entry eating hours every week
- No visibility into your own business metrics
- Processes that depend on one person remembering how they work
After
- Custom dashboards — everything in one place
- Automated workflows — data flows without you touching it
- Real-time metrics — know your numbers instantly
- Documented tools — your business runs even when you're away
What I build
Internal Dashboards & Admin Panels
Custom CRMs, inventory systems, workflow tools. Replace your spreadsheets with a single source of truth your whole team can use.
AI Automation
Chatbots, document processing, smart search over your company data. Automate the repetitive work so your team focuses on what matters.
API & Backend Development
FastAPI backends, database design, third-party integrations. The invisible engine that makes everything talk to everything else.
Full-Stack Web Apps
Customer portals, booking systems, e-commerce layers. Give your clients a professional digital experience, not a WhatsApp chat.
How we'll work together
Discovery call
We talk about your business, your pain points, and what you need. Free, no commitment.
Proposal & quote
I send you a clear scope, timeline, and fixed price. No surprises, no hidden costs.
Build & iterate
I build your tool with regular check-ins. You see progress, give feedback, we adjust.
Delivery & handoff
You get a working product. Optional maintenance retainer if you want ongoing support.
The tools I use
Next.jsModern web framework — fast, SEO-friendly, scales with you
AWSCloud infrastructure — your app runs on the same servers as Netflix
VercelZero-config deployment — your app is always online, always fast
FastAPIHigh-performance backend — handles thousands of requests without breaking a sweat
PydanticAIAI agent framework — the brains behind your automation
SupabaseDatabase & auth — your data, secure and accessibleWho I am
I'm Gontzal, an industrial engineer who spent 5+ years in data engineering before going all-in on full-stack AI development.
RoninStack is my freelance brand — named after the ronin, the independent warrior who gets things done without the baggage of a big army. No agency overhead, no account managers, no handoffs. Just me, building the tools your business needs, end-to-end.