Jimmy Hartzell: Systems Programmer#

Phone: 646-334-9882, Email: jah259@cornell.edu, Website: https://www.thecodedmessage.com/


  • Programming languages: Rust, C++, C, Haskell, Swift, Python, Objective-C, Bash, x86 assembly (32 and 64 bit)
  • Technologies: Linux systems/low-latency network programming, Tokio, Reflex FRP, Yocto, AWS, Ledger Nano S, Redis, C++ template metaprogramming

Career Experience#

  • Amtrak: July 2023-Present, Senior Principal Software Engineer
    • Technologies: C++, HP NonStop
    • Developed simulator for ITCS Positive Train Control protocol
    • Fixed bugs in HP NonStop dispatching codebase
  • Savant Systems: May 2021-June 2023, Senior Embedded Linux Software Developer
    • Technologies: Rust (incl. Tokio), Yocto, Swift, Objective-C, Redis
    • Wrote usermode Rust driver for Atmel energy meter
    • Adapted quickly to a decades-old Objective-C codebase
    • Developed and implemented migration plans for core components of system architecture
    • Rewrote Swift microservices and frameworks into Rust
    • Added caching layers around accesses to legacy key-value store, and implemented bidirectional synchronization between it and Redis
  • Obsidian Systems: March 2018-May 2021, Software Development Consultant
    • Technologies: Haskell, Reflex FRP, C, Ledger Nano S, Nix, C++
    • Full-stack Haskell application development
    • Worked with a variety of clients, with diverse corporate culture and organizational systems
    • Worked on Incremental View, a database research project for incremental queries on Postgres
    • Wrote apps in embedded C on Ledger Nano S (a platform w/ 4K of RAM)
    • Refactored overengineered client C++ codebases
    • Did trainings and talks on C++, Rust, blockchain, and Haskell
  • Tower Research: June 2013-March 2018, Senior Software Developer
    • Technologies: C++ (C++11, C++14), C++ template metaprogramming, Linux systems programming, clang-format, valgrind, gdb, FIX protocol, Intel64 assembly
    • Risk platform, C++ development (2017-2018):
      • Wrote a new high-performance logging system
      • Led a small team to add new trade reconciliation systems to comply with EU regulations
    • Lead training instructor (2016-2018):
      • Developed and taught full-time C++, networking, systems, and low-latency programming programming curriculum for new hires in US and India
      • Trained and mentored other instructors
    • FX trading desk, C++ development (2013-2016):
      • Mentorship: First line of defense for team member questions
      • Continuously made latency improvements for market data handlers
      • Developed new aggregator project to aggregate internal liquidity
      • Owned support for FX “last look” feature
      • Wrote/maintained handlers for many financial protocols
  • Moat: Feb 2011-March 2013, Infrastructure Developer
    • Technologies: Python, C++, Bash, AWS, S3
    • Led a 3-member team to develop server discovery and deployment scripts
    • Scalable bloom filter implementation in C++


  • Cornell University: Bachelors in Computer Science