Don Park

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## Don Park

• donp@donp.org
• Portland Oregon USA
• https://github.com/donpdonp

### Mission

To build or enhance software systems that are effective, maintainable, and predictable.

### Skills

• Effective in multiple programming languages and environments (Go/Node.JS/Ruby/Python/Java/Linux)
• Quick to pick up new technologies, frameworks, and languages
• Works with a test-driven methodology with a focus on deliverables
• Good communicator and organizer

### Project and Work History

• IceCondor API (2022 Feb - May) [project]
  • Rewrite API backend from Node.js to Rust
  • JSON over Websocket communications (multi-threaded)
  • Protobuf on-disk format for space efficiency
• Tilikuv (2021 Mar - 2022 Feb) [project]
  • Protocol bridge between IRC and The Matrix chat systems
  • MultiThreaded TCP/IP message queue
  • Small, efficient code
  • V-lang (a new go-like language)
• Yith (2020 Jan-May) [project]
  • Trade execution engine (receives orders from nimbook project)
  • Smart Contract calls to 4 distributed exchanges (Ddex, IDEX, Switcheo, RadarRelay/0x)
  • Ethereum transaction building, encoding, signing and submitting
  • Rust language
  • https://github.com/cointhink/yith
• Nimbook (2019 Nov-2020 Jan) [project]
  • Cryptocoin exchange orderbook retrieve/extract/compare
  • Compute arbitrage price differences, track with influxdb/grafana
  • Nim language
  • https://github.com/donpdonp/nimbook
• BlkMev (2019 Apr-May) [project]
  • Bitcoin wire-protocol implementation in perl6/raku
  • https://modules.perl6.org/dist/BlkMeV
• Bitcoin Script in WebAssembly (2018 Feb - 2018 Apr) [project]
  • Extracted the bitcoin script interpreter code (.cpp) to build with emscripten
  • Built web site to quickly evaluate bitcoin scripts on the “real” interpreter
  • https://donpdonp.github.io/bitcoin-wasm/
• Cointhink (2017-2018) [project]
  • Cryptocoin exchange trading bot hosting/execution
  • Go language API, elm website, and LXD linux containers
  • https://web.archive.org/web/20171126162006/https://cointhink.com/
• Cointhink (2013-2015) [project]
  • Arbitrage tracking on early bitcoin exchanges
  • Ruby on Rails, postgresql
  • https://web.archive.org/web/20160219100013/http://cointhink.com/arbitrage/btc:usd
• Vault (2016-2017) [work]
  • 10-person finance startup in Portland Oregon
  • Achieved API compliance with APEX Clearinghouse for NASDAQ access
  • Wrote Node.js implementation of portfolio balancing with stock trades on NYSE/NASDAQ
• Chroma Fund (2015) [work]
  • Early Bitcoin crowdfunding platform
  • Bitcoin colored-coin/non-fungible implementation from specs in Node.js
• Coindust (2015-2016) [project]
  • Command line bitcoin wallet in node.js, using bitcoinjs library.
  • Builds bitcoin binary transactions, calculates fees
  • https://www.npmjs.com/package/coindust
• Gluon (2014-present) [project]
  • Go-Lang pub/sub json based async irc bot framework
  • Manages multiple javascript interpreter instances

### Areas of Study

• Multi-threaded architecture
• Blockchain smart contracts
• Programming Language Design

https://donp.org/resume.pdf