David Gisselquist
Consultant at self-employed
Pennsylvania, United States
Summary
🤩
Rockstar🎓
Top SchoolDavid Gisselquist is a consultant and software engineer based in Pennsylvania with a decade of hands-on experience delivering backend solutions and tooling. He has contributed to notable open-source FPGA tooling, implementing and refining the JSON parser for nextpnr, enabling robust intake of design files for portable place-and-route workflows. Self-employed and adaptable, he blends independent consulting with deep technical troubleshooting across projects that require precise parsing and data integration. David's background includes a PhD in economics with anthropology from Yale, signaling a rare combination of rigorous analytical training and cross-disciplinary perspective. That academic grounding informs his practical approach to complex systems, where he emphasizes correctness and edge-case handling. Colleagues value his steady, detail-focused contributions that quietly improve reliability in production and open-source codebases.
10 years of coding experience
PhD, economics, with some anthropology, PhD, economics, with some anthropology at Yale University
Github Skills (12)
json-parser10
json10
jsonp10
c-language10
cprogramming-language10
parsing10
data-structure9
data-structures9
file-processing8
file-handling8
fileio8
file-access8
Programming languages (9)
Github contributions (5)
YosysHQ/nextpnr
Jun 2018 - Aug 2018
nextpnr portable FPGA place and route tool
Role in this project:
Backend Developer
Backend DeveloperContributions:29 commits, 1 PR, 1 push in 2 months
Contributions summary:David primarily worked on the JSON parser for the `nextpnr` project. Their initial contribution focused on implementing the core functionality of parsing JSON files. Subsequent commits involved refining the parser, addressing issues like negative number handling, and connecting the parser with other project components. The user's work was central to the project's ability to read and process JSON design files.
fpganextpnr
ZipCPU/website
May 2017 - Dec 2022
The ZipCPU blog
Contributions:707 commits, 3 PRs, 602 pushes in 5 years 7 months
zipcpuzipcpu-blogverilogverilatorfpga
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