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
3842 commits, 531 PRs, and 197 issues across 36 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-checkerrefactor(beancount): parse budget amounts via number1d
JP-Ellis/borrow-checkerdocs: list Daily among the budget periods1d
JP-Ellis/borrow-checkerfeat(bc-cli): accept --frequency daily on a loan1d
JP-Ellis/borrow-checkertest(bc-core): pin daily rollover across days1d
JP-Ellis/borrow-checkerfix(bc-ipc): keep a one-day Custom period out of Daily1d
JP-Ellis/borrow-checkertest(beancount): cover the evaluator's overflow branches1d
Latest issues & PRs
JP-Ellis/borrow-checker[issue · open]
bc_ipc::Period cannot represent a Custom period1dJP-Ellis/borrow-checker[issue · open]
Budget rollover walks one period per query back to the first revision1dJP-Ellis/borrow-checker[PR · merged]
feat(beancount): parse and expose Fava budgets1dJP-Ellis/borrow-checker[PR · merged]
feat: add Period::Daily1dSelected 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