Hello, again
I codify contracts between systems for a living, in Rust and Python. I once spent five years chasing where the antimatter went.
Senior software engineer at PactFlow (SmartBear). I help lead the open-source Pact Foundation and maintainpact-python; I also wrote tikz-feynman,rust-skiplist, and more.
Previously: data and cloud engineering at KPMG, and doctoral research in theoretical particle physics.
The year in code
4246 commits, 658 PRs, and 209 issues across 34 repositories.
Most of what I make is open. Each square below is one day of my GitHub contributions over the past year.
Latest commits
JP-Ellis/borrow-checkerdocs: point the e2e note at the job that runs it14h
JP-Ellis/borrow-checkerchore: group the opentelemetry crates for renovate14h
JP-Ellis/borrow-checkerchore(deps): update tracing-opentelemetry to 0.3414h
JP-Ellis/jpellis.mechore(e2e): run 150% workers in every context15h
JP-Ellis/jpellis.mefix(stats): skip GitHub refresh without a token16h
JP-Ellis/jpellis.mechore(deps): update lockfile16h
Latest issues & PRs
JP-Ellis/borrow-checker[PR · merged]
docs: fix the stale e2e note in CLAUDE.md14hJP-Ellis/borrow-checker[PR · merged]
chore(deps): update opentelemetry to 0.3314hJP-Ellis/borrow-checker[issue · open]
bc-plugins: bound plugin CPU and memory14hJP-Ellis/jpellis.me[PR · merged]
fix: opus review17hSelected projects
pact-pythonOSS · libraryPython bindings for Pact, rebuilt over a Rust FFI core. Downloaded over 1.3 million times a month.↗ github
tikz-feynmanOSS · LaTeXA LaTeX package for typesetting Feynman diagrams with TikZ; adopted across particle physics with 400+ academic citations.↗ github
↗ All projects