Matt Marcello

New York, NY, USA

I am a senior software and product engineer based in Brooklyn, NY. I have extensive experience working on greenfield projects, from conception and design through to concrete realization. I have always been an asset to business stakeholders who are not entirely certain what they are trying to build, let alone how to build it.

In my free time, you will find me refining classical French cooking techniques in the kitchen, practicing Qigong near my home in Prospect Park, or playing guitar whenever I happen to be around one.

I received a B.A. in Neurobiology from Harvard College in 2010.

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Work

Multicenter validation of a cholangioscopy artificial intelligence system for the evaluation of biliary tract disease
- Machine Learning
- Deep Learning
I developed a realtime AI system that facilitates the diagnosis of biliary cancer.
pubmed.ncbi.nlm.nih.gov
Kontor SDK
I designed and build the official Typescript SDK for Kontor, a Bitcoin meta-protocol.

The project leverages advanced TypeScript techniques to generate rich type signatures from smart contract definitions, without a code-gen step.
sdk.kontor.network
Horizon Wallet - Chrome Web Store
Horizon Wallet is a wallet for Counterparty, the original DeFi and NFT protocol on Bitcoin.
I was the engineering lead for the Horizon wallet web extension. Horizon is a Bitcoin wallet with support for the Counterparty Meta protocol.
chromewebstore.google.com
Application Monitoring & Crash Reporting Software | Backtrace
Backtrace is the crash and error reporting solution for the video game, embedded technologies, desktop/mobile software, and SaaS markets.
I ran the application team at Backtrace. This was a greenfield project that I initiated and carried through from design to development. Backtrace was acquired by SauceLabs for 90M.
backtrace.io

Experience

University of Massachusetts Chan
Senior Software Engineer
Jan 2023 - Present
My team is focused on developing machine-learning based solutions to diagnostic and therapeutic problems across a range of endoscopic modalities.
- Co-developed an AI diagnostic system for biliary disease that achieved 80% sensitivity and 90% specificity in multicenter validation, outperforming standard cytology and biopsy techniques
- Developed a real time co-pilot that assists physicians with a gallbladder drainage procedures
Unspendable Labs
Senior Software Engineer
May 2024 - Feb 2026
Unspendable Labs is driving Bitcoin adoption by building protocols and infrastructure that extend Bitcoin's functionality beyond the digital gold use case.
- Lead product engineer for Horizon Wallet, a cross-platform Bitcoin wallet with first-class support for Counterparty, a Bitcoin metaprotocol
- Designed and built the Kontor SDK, a TypeScript SDK providing a type-safe interface for querying contract state, composing contract calls, and signing and broadcasting transactions on a Bitcoin metaprotocol
Facet Labs
CTO ( Freelance )
Jan 2022 - Dec 2023
Building luxury physical goods for the display of digital art.
- Led technical design, planning, and execution of luxury wearable product that displays digital art ( NFTs ).
- Designed and built mobile and web applications that mediate wallet ownership verification, collection browsing, and hardware I/O.
- Defined technical requirements and API specifications for product hardware and firmware.
Symbiont.io
Product Engineer
May 2019 - Jun 2021
Privacy first blockchain platform for financial services.
- Collaborated with product and engineering teams to design and build blockchain native product demos, including smart contracts, backend services, and web interfaces.
- Built products in the supply chain, private equity, and index data domains — the latter, of which, helped to secure a partnership with Vanguard.
- Developed internal tooling to ease the setup and teardown of blockchain networks, including cloud infrastructure management and smart contract deployment.
Backtrace I/o
Staff Software Engineer
Jul 2015 - Dec 2018
Error and crash reporting for games and mobile apps.
- Lead the Backtrace web team, responsible for the design, planning, execution, and maintenance of the web interface for a software error aggregation and analysis platform.
- Created Query Builder, a complex UI for building analytical queries and visualizing data, as well as Web Debugger, a tool for exploring rich crash data in the web.
- Efforts led to Amazon Lumberyard, Spotify, and Apple as customers, and the eventual acquisition of Backtrace by Sauce Labs in 2021 for 90M.