Founding engineer. Builder. Zero to real users.
I build AI that companies run in production: voice agents, retrieval systems, realtime pipelines. Founder of Recal, where 1,200+ users turn meetings and Slack threads into recaps and decisions. Co-founder and CTO at Tree Labs, shipping agents for Jack, Cactus, and MascotBot. Now building Ray, an AI teammate for teams that live in chat.
Built, shipped, and operated — real users and production AI, not portfolio demos.
// founder
“AI meeting notes & Slack recaps”
Recal turns meetings and Slack threads into structured recaps, decisions, and tasks — so teams stop taking notes and never lose context. Automatic transcription, true video understanding, and chat with everything that's been said.
+
Users
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Tasks extracted
+
Conversations captured
// co-founder & cto
“AI agents that handle the work your team can't keep up with”
A studio that designs, builds, and operates production AI agents — voice, workflow, and knowledge/RAG — for ops, CX, and product teams. Custom builds, no SaaS lock-in. I own engineering direction, architecture, and technical hiring across client work.
2022
Building since
Case studies
Service lines
Trusted by
Jack
Cactus
MascotBot
Shopfront
Guesto// in development // founder
In early development
An AI teammate for small teams that live in chat. Give it task and status ops in plain language across Slack, Discord, and Telegram — it acts autonomously across your tools, asks approval before anything sensitive, and remembers how your team works. No dashboard.
Pre-launch — building in the open soon.
Started in mobile consulting, grew into founding-engineer roles, then into products of my own — 2019 to now.
// currently
Jul 2026 — Present · Remote
All-in on Ray — an AI teammate for teams that live in chat. Recal stays in production; Tree Labs keeps shipping client agents.
Also: founder of Recal · co-founder & CTO at Tree Labs
// base Benidorm, Spain · working remotely
Jul 2026 — Present
Remote
Building Ray full-time — an AI teammate for small teams that live in chat. Task and status ops in plain language across Slack, Discord, and Telegram; acts autonomously across your tools and asks approval before anything sensitive.
May 2025 — Jul 2026
Remote · US
Built the product and AI-operations stack for a home-services marketplace: SMS and voice agents, estimate generation, scheduling, payments, and the workflows pros and ops run on every day.
2022 — Present
Remote
Co-founded an AI agent development studio (formerly Tree Solutions). Engineering direction, architecture, and technical hiring across client builds — voice, workflow, and knowledge agents running in production.
Sep 2024 — Jun 2025
Remote
Construction and e-commerce tooling for a US construction-tech company — a commercial roof builder, sample-ordering flows, PDF generation, and backup/recovery systems.
May 2023 — Aug 2024
Remote · US
Helped build an AI-enabled commercial real estate platform for underwriting and investment workflows — product UI, data-heavy screens, document flows, and the engineering foundations.
Jun 2019 — Mar 2023
Remote · Poland
Built cross-platform mobile applications with React Native, focused on iOS delivery, API integrations, performance work, and close collaboration with product, design, and backend teams.
Production-proven across the stack — from React Native apps to realtime AI systems, at startups where shipping was the job.
Product engineering
AI systems
Mobile
How I work
+
Years shipping products
Founding / senior roles
Products of my own, live
// flexibility
Stacks are a moving target — every product deserves its own right answer. What compounds is knowing the trade-offs and shipping with whatever fits.
I work with founders and teams that need senior AI engineering — a session this week when you need answers, ongoing counsel, or joining early and owning the build.
// 01
One-off sessions when you need answers this week: build vs buy, agent architecture, cost and latency. Prepaid and recorded — you leave with a written action plan.
Per session
// 02
Ongoing technical counsel for founders making their first big engineering bets — architecture, AI product direction, and the hiring bar.
Retainer
// 03
Join as an early, first, or lead engineer. I take products from zero to real users and own the messy middle: product, infrastructure, and the operational glue between them.
Full-time / Part-time
$ mark engage --mode=session > book 60 or 90 minutes, prepaid > prep I read your docs before the call > answer build vs buy, architecture, cost > deliver written action plan within 48h status: sessions — booking open
Hard problems, small teams, real users.
Built with & for
