Hello, again
I codify contracts between systems for a living, in Rust and Python; and once spent a decade chasing where the antimatter went.
Senior software engineer at PactFlow (SmartBear). Open source contributor to pact-python,tikz-feynman, rust-skiplist, and more.
Previously: data and cloud engineering at KPMG, and a PhD in theoretical particle physics.
The year in code
3719 commits, 505 PRs, and 183 issues across 35 repositories.
Most of what I make is open. The grid below is the truthful version of a résumé — public, dated, and dense in the parts where I was paying attention.
Latest commits
JP-Ellis/borrow-checkerfix(ci): allow mise ten minutes to install tools6h
JP-Ellis/borrow-checkerfix(ci): drop doc tests from the coverage run6h
JP-Ellis/borrow-checkerstyle: pin tombi line-width and reformat TOML6h
JP-Ellis/borrow-checkerchore: update prek hook revisions7h
JP-Ellis/borrow-checkerchore: lint workflow files with actionlint7h
JP-Ellis/borrow-checkerchore(ci): split E2E out, fold coverage into tests7h
Latest issues & PRs
JP-Ellis/borrow-checker[issue · open]
CSV importer: unknown-key warnings don't cover nested config structs4hJP-Ellis/borrow-checker[issue · open]
CSV importer: currency-prefixed, comma-grouped amounts fail to parse4hJP-Ellis/borrow-checker[issue · open]
Add a dedicated importer for periodic balance-and-income statements4hJP-Ellis/dotfiles[PR · merged]
fix(shell): render man pages through col before bat4hSelected projects
pact-pythonOSS · libraryPython bindings for Pact, rebuilt over a Rust FFI core. The version most pact-python users actually reach for.↗ github
tikz-feynmanOSS · LaTeXA LaTeX package for typesetting Feynman diagrams with TikZ; adopted across particle physics with 400+ academic citations.↗ github
↗ All projectsRecent writing