Systems break.
Growth stalls.
We fix that.
CTO-level thinking for seed-to-Series-A founders, hands-on execution for growing teams, AI-native development. From a WordPress site that needs to stay up to a fintech platform that needs to pass audit — architected, built, and run by someone who's done both.
Same brain.
Different scale.
Whether it's a fintech platform or a WordPress site that needs to stay up — same engineering mind, applied at your scale. When a project needs more hands, I bring in trusted specialists I've worked with for years: senior engineers, mobile developers, designers. Pick the tier that fits.
Strategic & Advisory
I work as a fractional CTO for startup founders — seed to Series A — and for scale-ups that need the right technical decisions made in the right room, without the full-time salary.
- Fractional CTO engagements
- Startup tech strategy — seed through Series A
- Technical audits & due diligence
- Architecture reviews
- Code review & quality
- Technology strategy & roadmaps
Development & Engineering
Complex systems, built right. Custom SaaS, mobile apps, AI integration, fintech infrastructure — full-stack, production-grade, battle-tested.
- Custom web apps & SaaS platforms
- Mobile apps — iOS, Android, React Native
- AI integration & multi-agent systems
- Fintech & payment systems
- APIs, backends, cloud infrastructure
Web & Digital Presence
Not every project needs a platform. Sometimes a clean website, a WordPress upgrade, or a store that converts. Same quality, scoped right.
- Website design & development
- WordPress — deep, custom, performant
- E-commerce (WooCommerce & custom)
- Redesigns & modernization
- SEO foundations & Core Web Vitals
Hosting & Ongoing Support
Your site, run the way we run fintech infrastructure — logs, SLOs, backups, and a human who picks up. EU-compliant contracts, proper invoices, GDPR-ready.
- Managed hosting · DNS · SSL · email
- 24/7 uptime monitoring & alerting
- Updates, security patches, backups
- Emergency fixes & small updates
- Monthly performance reports
AI integration for enterprise.
— multi-agent systems.
Beyond the standard 4-tier ladder, AI integration is a primary offer — multi-agent systems, RAG, intelligent automation, and compliance. Production-grade, evaluation-driven, EU data-residency aware.
- Multi-agent design — plan/act/reflect loops with tool calls, supervisor patterns, and observable traces
- RAG & vector search — pgvector, Qdrant, or Pinecone with citation-enforced generation and eval harness
- AI ops & evaluation — token budget tracking, prompt versioning, A/B evaluation, regression detection
- Compliance & data residency — EU-region deployment, GDPR-aligned data flows, on-prem open-source options
We don't list services.
We ship fixes.
Every engagement starts with a symptom. Diagnose first, act second. Six problem shapes we've seen in the wild — with real before/after signals.
System on fire. Team can't say why.
Slow platforms, broken integrations, infra that fails at 3am. Dig in, find the real cause, fix it — fast.
Architecture won't take you to the next plateau.
Legacy holding you back. Modern, scalable replacements — monolith → microservices, .NET → React, without throwing away what works.
Traffic up. Costs up. Something snaps.
Optimize what you have, prepare for what's next. AWS, Redis, database tuning — engineered for load, not hope.
Everyone says "add AI." Nobody says how.
Real AI: multi-agent automation, intelligent categorization, moderation, workflows — shipped to production, not stuck in POC.
Fintech is hard. Regulated fintech is harder.
Payment systems, crypto custody, KYC/KYB, trading APIs. Built to pass audit and survive load.
You just need your site to stay up.
WordPress, hosting, DNS, SSL, backups. Monitored 24/7 by someone who actually picks up. Averaged 14-minute response last quarter.
Systems we built.
Still running.
A selection — from CTO-led fintech platforms to WordPress sites that had to stay up. Every case study ships with real numbers and a real architecture, not founder quotes.
CryptoUnity
I led the full technical vision and execution — architecture, middleware (CUBE), admin and creator portals, mobile apps (iOS + Android), BitGo custody integration, smart contracts for staking and OTC. Three codebases consolidated; 8 integration phases from zero to production.
GetThrivin
I stepped in to build the full technical foundation from scratch — backend (Express + TypeScript), web (Next.js 16, React 19), mobile (React Native + Expo). SAML SSO, Coursera API, BullMQ job queue, Mailgun, demo seed data. Guided international rollout with FIPS Africa compliance.
Dealko
First Slovenian AI assistant for comparing telecom packages. Intelligent conversation handling with plan recommendations, embedded widget for partner sites, GDPR-compliant lead qualification, and backoffice admin for operator partners.
CrewPress — AI WordPress Automation
Multi-agent system automating content, SEO, and site management via CrewAI. Full SaaS platform with Stripe billing, licensing, usage tracking.
ZDGNS — Healthcare Booking Portal
Reservation system for a Slovenian healthcare organization — property management, multi-language, payment integration, accessibility compliance, member dashboard.
Museum Guide App
Native Android + iOS guide app with 40+ exhibit stops, 360° panoramas, QR scanning, and deaf-first visual design — built for the Slovenian Association of the Deaf and Hard of Hearing.
LiveSubtitles — Real-time subtitle streaming
Java desktop app that overlays live subtitles onto video streams in real time for deaf and hard-of-hearing audiences. JavaCV/FFmpeg pipeline, RTMP output, 50 ms buffer target. Overlay variant deployed by one of the world's largest organisations across multiple countries.
Small jobs, same standard.
T4 / care clientsCommunication was fast and professional. Everything we agreed on was delivered on time, and design suggestions came with real taste. Numen will be our first choice for future projects.
Dejan Čopič · KK Jesenice (Alpe Adria tournament site)
We've worked with Numen for years — from the reservation portal to the museum app and accessibility tools. Davor genuinely understands the needs of the deaf and hard-of-hearing community.
Matjaž Juhart · ZDGNS
We've worked with Numen for years. Responsive, fair, and ready to advise on design choices. Every site they've built for us turned out exactly as we wanted — or better. Highly recommend.
Jan · Čarodej Jan
More client quotes coming as we collect them.
Ready to fix, build,
or scale?
30 minutes, with me personally. I'll read your system like a log file and tell you what I'd do first. No pitch deck, no sales funnel.
— Davor Majc, founder, Numen