Harm Aarts

Randstad, Netherlands

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Summary

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Rockstar

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Top School

Harm Aarts is an entrepreneurial software engineer with 17 years of hands-on experience building backend systems, crypto projects, and founding multiple startups. He combines deep technical work—contributions to notable open-source projects like Electrum, FlexGet and devdocs—with product and company leadership, most recently as Co-Founder and Chief of Product at 21 Analytics where he designed the TRP protocol. Comfortable moving from low-level protocol and network refactors to team leadership and sales, he excels at translating complex requirements into elegant, usable solutions. His background includes unusual cross-domain achievements such as developing a heritage real-estate project into four high-end sustainable apartments, illustrating pragmatic project delivery beyond software. Known for clear communication, operational rigor and out-of-the-box problem solving, he fosters collaborative teams that consistently ship. Based in the Randstad, he’s continually seeking new technical challenges at the intersection of crypto, backend engineering and product strategy.

17 years of coding experience

17 years of employment as a software developer

MSc, Computer Sciences, AI, MSc, Computer Sciences, AI at Utrecht University

English, Dutch, German

Stackoverflow

Stats

10,195reputation

734kreached

32answers

27questions

Badges

http

top-5%

ruby

top-5%

ruby-on-rails

top-5%

Github Skills (67)

ec10

python10

command-line-interface10

bitcoins10

cryptocurrency10

scrapy10

webscraper10

mib10

im10

webscraping10

socket10

api10

rust10

dart10

apidoc10

Programming languages (26)

C#CCMakeGoHTMLTypeScriptShellSCSS

Github contributions (5)

simc/logger

Oct 2019 - Oct 2021

Small, easy to use and extensible logger which prints beautiful logs.

Role in this project:

Full-stack Developer

Contributions:5 reviews, 70 commits, 39 PRs in 1 year 11 months

Contributions summary:Harm primarily focused on enhancing the logging functionality of the project. They added the ability to specify log levels per instance and removed global variables, improving the flexibility of the logger. The user also refactored the printer interface, making it more testable and decoupled from the logger core, and introduced a new stream output option. Furthermore, they added a new LogfmtPrinter and made improvements to the example.

loggerloggingextensiblelogcatlogs

mimblewimble/grin

Dec 2017 - Jan 2019

Minimal implementation of the Mimblewimble protocol.

Role in this project:

Back-end Developer

Contributions:6 commits, 3 PRs, 15 comments in 1 year

Contributions summary:Harm primarily focused on enhancing the API functionality of the Mimblewimble Grin implementation. Their contributions involved fixing API endpoints, replacing hardcoded values with placeholders, and providing clearer documentation and examples for existing API routes. They also added the capability to load configuration files through CLI flags, improving the server setup. These updates directly improved the usability and configuration of the Grin node server.

cryptographyrustprotocolmimblewimblecryptocurrency

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