ICT Specialist & Software Engineer
ICT &
Software
Engineer
Dutch full-stack engineer and infrastructure specialist operating between the Netherlands and Brazil. Building SaaS platforms, POS systems, and AI integrations since 2010.
15+
Years exp.
3
Languages
NL+BR
Countries
10+
Live platforms
Status
Available for projects
Based in
Netherlands · Brazil
Languages
NLENPT
Stack
PHP · MariaDB · LiteSpeed
Infra
MikroTik · Hyper-V · Cloudflare
Email
rudolf@pietersma.com.br
SaaS
Multi-tenant platforms
POS
Retail & restaurant
AI
WhatsApp bots & GPT
Infra
Hyper-V · MikroTik · Linux
SEO
Technical & Schema.org
Selected workAll services →
01
Lojas do Gringo
Full multi-tenant white-label POS with WhatsApp AI, PIX, loyalty, GPS delivery, and PWA.
lojasdogringo.com.br
↗
02
SDO Contábil
Full accounting system: P&L, CND management, receivables, and client portal.
—
→
03
Rijschool Jolanda
Dutch driving school site with advanced technical SEO, Schema.org, and admin PWA.
rijschooljolanda.com
↗
04
PM Dashboard
VBA dashboard for preventive maintenance CMMS across Syngenta sites in the Netherlands.
—
→
ServicesFull list →
SaaS & POS platforms
Multi-tenant architectures, WhatsApp AI, PIX, VAPID push, PWA — production-ready.
Infrastructure & networking
Hyper-V, MikroTik RB5009, Cloudflare Tunnel, Tailscale, Ubuntu, fail2ban.
AI integrations
WhatsApp bots with Claude/GPT, live business data, escalation logic.
Let's build something.
Available for freelance projects, consulting, and technical partnerships.
Get in touch