## 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 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

  * defihub.markets (May 2023 - Present) [Sole Proprietorship]
    * Defi/Uniswap pool constant-product pricing information
    * Ethereum mainnet chain following for realtime data collection written in rust
  * TrustMachines (Bitcoin L2) / Blockchain Engineer (Aug 2022 - March 2023)
    * Contribute to Bitcoin L2 Stacks(STX) node miner software
    * Research and development of a pegged bitcoin equivalent using Schnorr group signatures
    * Deep understanding of bitcoin transaction and address types 
  * 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