Websites & Online Stores
A fast, modern website or online store that shows up on Google, works on every phone, and turns visitors into customers — with payments, bookings, or WhatsApp contact built in.
Guillermo Peitzner
Software that helps your business sell more and work less
Websites, custom software, automation, and AI assistants for businesses.
How I can help
Four ways I help businesses grow and save time.
Custom Software & Automation
Replace spreadsheets, paperwork, and repetitive tasks with software made for how your business actually runs — inventory, orders, invoicing, reports, and the integrations between them.
AI Assistants for Your Business
Chatbots that answer customer questions around the clock, tools that read and sort documents, and assistants that handle routine work — so your team can focus on what matters.
Reliability, Cloud & Tech Advice
Keep your systems online, secure, and affordable. I review what you already have, cut waste in hosting costs, and give you an honest second opinion before you invest in technology.
How working together goes
No jargon, no surprises. Four clear steps from first call to launch.
- 01
Free call
We talk about your business, your goals, and what is slowing you down. No cost, no commitment.
- 02
Clear proposal
You get a written plan with a fixed price and a timeline, so you know exactly what you are getting.
- 03
Built with you
I build it in small steps and show you progress every week, so nothing is a surprise at the end.
- 04
Launch & support
We go live together, I train your team, and I stay available to fix and improve things afterward.
Why you can trust the work
Years of building software, plus certifications from The Linux Foundation, OpenJS, and Scrum Inc.
- K★
- CKS
- CKA
- CKAD
- KCSA
- KCNA
- LFCS
- LFCA
- JSNAD
- JSNSD
- RPO
- RSM
- W3TS
Full list of technologies I use
- TypeScript
- React
- Next.js
- Node.js
- Python
- Go
- Kubernetes
- Docker
- Helm
- Terraform
- GCP
- AWS
- Azure
- PostgreSQL
- Redis
- GraphQL
- REST
- gRPC
- CI/CD
- GitOps
- ArgoCD
- GitHub Actions
- Jenkins
- Contentful
- LangChain
- LLMs
- MCP
- RAG
- Linux
- Bash
Common questions
Straight answers before we talk.
How much does it cost?
It depends on what you need, but every project gets a written proposal with a fixed price before any work starts. The first conversation is free.
How long does a project take?
A website or online store typically takes a few weeks. Custom software and automation take longer depending on scope. You get a timeline in the proposal.
Do I need technical knowledge?
No. I explain everything in plain language and handle the technical decisions. You only need to tell me how your business works.
Do you work with small businesses?
Yes. I work with businesses of all sizes, from a single shop to established companies.
What happens after the launch?
I train your team and stay available for fixes, updates, and improvements. You are never left alone with something you do not understand.
Tell me about your business
Send me a short message about what you need. I reply within one business day.