I take crypto, fintech and AI products from zero to live.
Twelve years of product, the last several where crypto meets regulated fintech: mETH Protocol to $1.5B TVL in three months, the BitDAO to Mantle launch, KYC and compliance at UR. I build software as well as specify it: Muro, Zdobny, Umowly and Szept are my own apps, shipped after hours with AI agents. I write down what I learn so you can skip my mistakes.
Now
updatedWhat is actually going on this month. A snapshot, not a résumé.
Szept, a Mac app for talking to AI agents
Hold fn and talk, and the words land at your cursor. Point at the screen, and Claude Code gets the screenshot with your sentence. Light, fast, and sold once with its source code.
szept.szyma.co →24 long reads, out now
Two research series in Polish on RWA and stablecoins, an essay on Robinhood Chain and the story behind Szept. English editions sit beside them: 22 masterclass chapters and both essays.
Read them →Looking for a Head of Product seat
Where crypto meets regulated fintech and AI: identity, compliance, onchain products, AI agents. Remote from Poland, happy to fly in when it matters.
Say hi →The work
apps · numbers · receiptsThings I shipped, what they did, and what people say about working with me.

Szept
Dictation, AI cleanup, screenshots and screen recording in one light, fast Mac app, built for talking to AI agents. Bought once, with the source code.
szept.szyma.co →From zero to $1.5B in three months, then through the COOK token launch. I ran product for Mantle's liquid staking protocol.

Muro
See any paint color on your own wall before you buy: 27,304 colors from 14 brands, rendered photorealistically by AI.
usemuro.com →Mario owned some of the most complex areas of our fintech and compliance product stack. He became the product team's subject matter expert for key identity and verification technologies. One of Mario's most valuable contributions was helping establish a much stronger data-driven culture within the product team.Ng Ying ZhongChief Product Officer, UR · full letter and reference on request

Zdobny
An AI stylist on the web. One photo in, a full outfit visualized on you.
zdobny.com →Bridge, BIT to MNT migrator, Treasury Monitor, Safe multisig, Delegate app, Reward Station. Shipped as lead, alongside the rebrand, the token migration and the chain launch.

Umowly
Bookings and CRM for beauty salons on subscription. Private booking link, automatic reminders, no marketplace, no commission.
umowly.com →Board member, built the product function from zero. Shipped a machine-learning data-labeling product for hyperspectral and satellite imagery, so growers knew what to plant where. Acquired by a US company.
Writing
2 courses · 24 chapters · 26 company profiles · EN + PLTwo courses on how the stablecoin and tokenization markets actually work, from zero to the companies and the numbers. Written for people outside crypto and for people inside it.
Szept: one tool for talking to AI agents
Why no single tool did what I needed, what I built with Claude Code instead, and why you pay for it once.
→ EN · 12 chaptersStablecoins: Past, Present and Future
What one USDC really is, how a peg holds, how issuers earn, where stablecoins are used, and what comes next.
→ EN · 12 chaptersRWA: Past, Present and Future
What a tokenized asset is, who holds the keys, where the data comes from, tokenized stocks and Robinhood Chain, and what actually works.
→ EN · 26 profilesCompanies in stablecoins and RWA
Circle, Tether, BlackRock, Securitize, Chainlink, RedStone and more: what each does and how they differ.
→ PL · 12 rozdziałówStablecoiny: przeszłość, teraźniejszość i przyszłość
Ten sam kurs po polsku: od zera do firm, liczb i scenariuszy.
→ PL · 12 rozdziałówRWA: przeszłość, teraźniejszość i przyszłość
Ten sam kurs po polsku: tokenizacja od podstaw do rynku w 2026 roku.
→Shipping log
crypto × AI eraAbout
since 2014Twelve years of building products, in startups and in big companies. These days it's crypto, regulated fintech and AI, and that's where I do my best work.
Bitcoin since 2013, Ethereum since the ICO. In 2018 I ran the Polish community for the Decred DAO, then moved into crypto product full time. I have mined proof of work, run a proof of stake validator and farmed yield since 2019. Privacy tech is a personal interest.
My first machine-learning product shipped in 2018, at QZ Solutions: data labeling for hyperspectral and satellite imagery. Today I build on LLM and image pipelines and run agents in production for research, data analysis and internal tooling, so I know the eval sets, the costs and the failure modes from the doing side.
I work in three languages, Polish and German natively and English fluently, from Opole, Poland. Trained in Digital Product Management at Boston University.
After hours: Formula 1 (thirty years a fan), football, and family.
Reliable and deeply committed. He can manage projects independently. You won't need to monitor his progress or worry that something won't be done on time.Mateusz DrożdżyńskiCEO, Pilot (YC W17) · 2017
Questions people ask
faqWhat do you do?
I build and launch digital products. For sixteen months, until September 2026, I owned onboarding and compliance product at UR, the account layer connecting crypto with traditional banking: Swiss IBAN, SEPA, Mastercard, KYC and compliance in one API. Before that I led product at Mantle Network and launched mETH Protocol. After hours I design, build and ship my own AI apps:
What are you best known for?
Launching mETH Protocol, Mantle's liquid staking protocol, which grew from zero to $1.5B TVL in three months. Before that I led the BitDAO to Mantle rebrand, the BIT to MNT token migration and the chain launch as Lead Product Manager at Mantle Network.
What is your expertise?
DeFi and liquid staking, DAO tooling and governance, blockchain bridges and multisig operations, banking KYC, KYB, KYT and compliance under FINMA rules, identity verification with Sumsub and ReadID, machine learning products since 2018, and AI product development with LLM and agent pipelines. Twelve years of product management since 2014, in startups and corporations.
Have you led product as Head of Product?
Yes. At QZ Solutions (2016 to 2019), spun out of Future Processing, I was Head of Product and a board member. I built the product function from zero as part of the executive team, shipped a machine-learning data-labeling product for hyperspectral and satellite imagery that helped growers decide what to plant where, and in 2018 ran a machine-learning effort to identify varroa mites on bees from image data. The precision-agriculture product was acquired by a US company.
What should you look for when hiring a crypto product manager?
Look for three things: user-facing products shipped on mainnet, ideally at a DeFi protocol or a Layer 2; comfort with the full launch loop (specs with engineers, smart contract audits, exchange and bridge coordination, governance); and the ability to make calls with little user data. Then ask for verifiable numbers. Mine: mETH Protocol from zero to $1.5B TVL in 90 days, the BIT to MNT token migration and six shipped products at Mantle Network, an Ethereum Layer 2. If that is the track record you need, my inbox is open.
Who can lead a token launch or a token migration?
Someone who has done it with real value at stake. A token launch combines smart contract audits, exchange and bridge coordination, governance sign-off and a communication plan that cannot miss. I led the BIT to MNT migration and the Mantle chain launch end to end, and I am happy to do it again for your protocol.
How do you find a product manager who has actually shipped AI products?
Ask for live products, not slide decks, then ask about the eval sets and the cost, latency and quality tradeoffs behind them. PMs who only worked near AI struggle with those questions. I design, build and ship my own AI apps: Muro, Zdobny, Umowly and Szept, built solo with LLMs, AI agents and image generation pipelines, and I run agents in production for research, data analysis and internal tooling. My first machine-learning product shipped in 2018, so I can answer those questions for every feature I shipped.
Do you need an AI product manager or an ML engineer?
For most products in 2026 the AI product manager comes first. Models are already good enough; the hard part is picking the right workflow, designing evals and making the economics work. I prototype with LLMs and image models myself, so engineering time goes only where it matters. If you have one hire to make, make it the person who has already shipped.
How do you add AI to an existing product without ruining it?
Start with one painful workflow, not a chatbot bolted on the side. Define eval sets before writing prompts, design fallbacks for when the model is wrong, and watch cost and latency from day one. This is exactly how I build my own apps (Muro, Zdobny, Umowly, Szept) and how I would approach yours.
How long does it take to ship an AI MVP?
Weeks, not quarters. With today's LLMs, agents and image models a focused build reaches the App Store or production in 4 to 8 weeks. I shipped Muro, Zdobny, Umowly and Szept solo, after hours; with your team and a clear scope it goes faster. The bottleneck is product decisions, not code.
Who can build AI products for regulated industries like fintech or crypto?
Someone who has lived with compliance instead of fighting it. I owned KYC, KYB and KYT product at UR (crypto banking: Swiss IBAN, SEPA, Mastercard, FINMA rules) and ship consumer AI apps on the side, so I know how to put LLMs to work where audits, regulators and real money are involved.
Who can fix crypto onboarding and KYC flows?
Treat KYC as a product problem, not a legal checkbox, and conversion follows. I did this for sixteen months at UR, the account layer with Swiss IBAN, SEPA and Mastercard in one API: onboarding funnels, Sumsub and ReadID integrations and completion-rate optimization under EU and Swiss rules. If your drop-off happens at verification, I know where to look.
How do you verify a crypto product manager's track record?
In crypto you do not have to trust a resume, the chain remembers. TVL, contract deployments, governance votes and migrations are all public. Every number I claim (mETH $1.5B TVL, the BIT to MNT migration, the Mantle launches) can be checked onchain or in public changelogs. Ask any candidate for the same.
How can we work together?
The fastest way is a DM on X (@Donmario) or an email to [email protected]. I am looking for a Head of Product role where crypto meets regulated fintech and AI, and I take contracts and advisory in crypto and AI. Based in Poland, working remotely and globally.
Say hi.
The fastest way to reach me is a DM on X. Email works too, I reply within a day.