Don Park

## Don Park

• don.park@gmail.com
• Portland Oregon USA
• https://github.com/donpdonp

### Mission

To build blockchain systems that are secure, effective, and predictable.

### Skills

• Studying and participating in blockchains since 2010
• Effective in multiple programming languages and environments (Go/Node.js/Rust/Python/Linux)
• 15 years of software development, documented in github; Linux tools; Cloud platforms
• Quick to pick up new technologies; Good communicator and organizer

### Work History

• IceCondor.com / Rust Developer (2022 Feb - 2022 May) [Sole Proprietorship]
  • Ingests streaming data from mobile clients
  • Multi-threaded network daemon, JSON client-server protocol, secure access management
  • Millions of location records with effective indexing
  • https://github.com/icecondor/api-rs
• Yith / Rust Developer (2020 Jan - 2020 May)
  • Trade execution engine (receives orders from Nimbook (see below))
  • Smart Contract calls to 4 distributed exchanges (Ddex, IDEX, Switcheo, RadarRelay/0x)
  • Ethereum transaction building, encoding, signing and submitting
  • Profit/Risk monitoring and validation before submitting any transactions
  • https://github.com/cointhink/yith
• Nimbook / Nim Developer (2019 Nov - 2020 Jan)
  • Cryptocoin exchange orderbook continual retrieve/extract/compare
  • Compute arbitrage price differences, track with influxdb/grafana
  • Built to quickly incorporate new exchange datafeeds
  • https://github.com/donpdonp/nimbook
• BlkMev / Blockchain Developer (2019 Apr - 2019 May) [project]
  • Bitcoin wire-protocol implementation in perl6/raku
  • Demonstrates a deep understanding of the blockchain and transactions
  • https://modules.perl6.org/dist/BlkMeV
• Bitcoin Script in WebAssembly (2018 Feb - 2018 Apr) [project]
  • Extracted the bitcoin script interpreter code (C++) compiled to WASM
  • Built a web site to evaluate bitcoin scripting language using WASM (not emulated in javascript)
  • https://donpdonp.github.io/bitcoin-wasm/
• Cointhink version 2 / Full Stack Developer (2017-2018) [Sole Proprietorship]
  • Cryptocoin exchange trading bot hosting/execution
  • Go language API, elm website, and LXD linux containers
  • https://github.com/cointhink
  • https://web.archive.org/web/20171126162006/https://cointhink.com/
• Cointhink / Full Stack Developer (2013-2015) [Sole Proprietorship]
  • Arbitrage tracking on early bitcoin exchanges
  • Ruby on Rails, postgresql, Elm, Javascript
  • https://web.archive.org/web/20160219100013/http://cointhink.com/arbitrage/btc:usd
• Vault / Lead Javascript Developer (2016-2017)
  • 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 / Lead Javascript Developer (2015)
  • Early Bitcoin crowdfunding platform
  • Bitcoin colored-coin/non-fungible implementation from specs in Node.js
• Coindust / Lead Javascript Developer (2015-2016)
  • Command line bitcoin wallet in node.js, using bitcoinjs library.
  • Builds bitcoin binary transactions, calculates fees
  • Published in NPM, still used today
  • https://www.npmjs.com/package/coindust
• Gluon / Lead Go Developer (2014-present) [project]
  • Go-Lang pub/sub json based async irc bot framework
  • Manages multiple javascript interpreter instances
• IceCondor.com / Lead Javascript Developer (2008-present) [Sole Proprietorship]
  • Ingests streaming data from mobile clients
  • Android client, published in Play store
  • Node.js API backend
  • JSON over Websocket communications (multi-threaded)
  • Protobuf on-disk format for space efficiency
  • https://github.com/icecondor/api-rs

### Education

• University of Portland
  • Bachelors of Science in Computer Science
• Portland State Univ.
  • Graduate Dept in Computer Science (unfinished masters degree; all but Thesis)

https://donp.org/resume.pdf