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Welcome to Aaron's freelance profile!

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Aaron Ball

software and reliability engineering at scale
  • Suggested rate
    €800 / day
  • Experience15+ years
  • Response rate100%
  • Response time1 hour
The project will begin once you accept Aaron's quote.
Location and workplace preferences
Location
Leiden, The Netherlands
Can work onsite in your office in
  • and around Leiden (up to 50km)
  • and around Amsterdam (up to 10km)
  • and around The Hague (up to 10km)
Verifications

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Verified email
Languages
Check out languages spoken by Aaron
Categories
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Skill set (20)
Check out Aaron's expertise
Industry fields of expertise
Banking and Financial Services
Biotechnologies
Health and Wellness
Social Networks
E-commerce
Aaron in a few words
I enjoy large scale, diverse and deep problems, from genome sequencing to internet infrastructure to high-frequency trading. I'm seeking a variety of consequential work, and benefit from direct engagement with the people my work is affecting or with metrics that closely reflect their experience.
Experience
  • Appalachia B.V.
    Consultant
    December 2023 - Today (1 year and 1 month)
    Amsterdam, The Netherlands
    Independent consulting for software projects, with a focus on scalability, reliability, observability, and security.
  • Jane Street Capital
    Infrastructure Engineer, Core Services
    January 2021 - May 2023 (2 years and 4 months)
    New York, NY, USA
    Reliability engineering and systems support for high-frequency trading.

    • Developed, maintained, and managed software lifecycle for infrastructure monitoring and configuration tools (OCaml, Golang, Python, SNMP, Prometheus, Grafana)
    • Led time synchronization & MiFID II compliance reporting effort for O(10k) hosts globally with microsecond precision (NTP, PTP, GPS appliance & radio troubleshooting, Chrony, C)
  • NS8
    Senior Software Architect
    August 2019 - September 2020 (1 year)
    Las Vegas, NV, United States
    Led design for scaling, observability, and reliability engineering for ecommerce fraud-prevention app. (Node.js, TypeScript, Python, Honeycomb, Prometheus, AWS, Terraform, GitHub, CI/CD)
    • Check out Aaron's experience
Recommendations
Education
  • Bachelor of Science - Mathematics
    UMass/Boston
    2008