Arnold Hoffner

Software Engineer | Market Access | C++ Python

Nov 2023 – Present · Currently

Market Access (C++/CMake)

• Developed and tested a binary market:
  • Texas Stock Exchange ("seed" and "rake" protocols)
• Developed and tested 5 FIX plugins/markets:
  • Pragma Polaris FIX: Implemented a hash map for accelerated validation of large tag combinations.
  • BofA Instincts X ATS FIX
  • Instinet Blockross ATS FIX
  • Virtu MatchIt ATS FIX
  • Virtu Posit ATS FIX
• CMEFIXP plufin: Developed a solution for sharing party details across multiple plugins instances.
• Trading Logic Enhancements: Developed a solution to resolve routing conflicts in round-robin mode and implement the mechanics of conditional orders.
• Quality Assurance: Corrected multiple issues related to tag handling (tags sent, not sent, incorrect values).

Monitoring Solutions Improvement (C++/Python)

• Order History feature: Designed and enhanced a low-latency script to trace an order history by searching data within very large files.
• Configuration Management: Exposed static routing configuration into shared memory.
• Routing Visualization: Enhanced a tool (script using ZMQ) to display routing configuration.

Installation Project Script (Python)

• Port packaging feature: Implemented port mapping to package a complete installation within a specific range of ports.
• Installation Utility: Developed a multi-install, multi-thread installation process.

Scrum master | L2-Packet Scheduler

Dec 2022 – Aug 2023 · 9 months

• Facilitate Scrum: Run all Scrum events, including the Daily Scrum.
• Remove Impediments: Clear obstacles hindering team progress.
• Protect Team: Maintain the team's focus, commitment, and pace.
• Report & Manage Risk: Give the Product Owner a weekly progress and risk report.

C++ Software engineer | L2-Packet Scheduler

Nov 2017 – May 2023 · 5 years 7 months

L2 Packet Scheduler (C++ / CMake)

• Developed and monitored the Per-Call Data Measurement (PCMD) feature.
• Employed Test-Driven Development (TDD) for comprehensive unit testing.

System Component Testing (SCT) (C++ / CMake / Python)

• Created a complete component to simulate PCMD functionality interactions.
• Developed a separate component to model User Equipment (UE) behavior.
• Replaced the Bash SCT upload/execution script with an Object-Oriented Python implementation, boosting efficiency.

Clients & technical support

• Resolved critical client issues with the telecom gNB product through direct and consistent communication.
• Analyzed extensive noise and event log data to identify root causes and delivered numerous hotfixes.