BUENOS AIRES → LONDON MAY 2026 joining 80,000 hours
Luca De Leo
AI safety infrastructure engineer. Building the unglamorous, load-bearing parts of the field — shipping for 80,000 Hours, Alignment Journal, ASTN, and BAISH.
lvca.dev // activity
2h ago C primes — Sieve W30 output bits directly +179 -63
2h ago C primes — Add nth prime wheel30 path +235 -1
3h ago C primes — Add W30P1 wheel bitmap output +978 -55
3h ago C primes — Add pipelined gap output format +1136 -30
3h ago C primes — Add default wheel30 bitmap path +938 -49
4h ago C primes — Add experimental bucket sieve mode +271 -13
4h ago C primes — Clarify static write partition invariants +10 -13
4h ago C primes — Balance binary write partitions by output count +26 -2
5h ago C primes — Document stats mode scope +3 -0
5h ago C primes — Document static binary write partitions +5 -4
5h ago C primes — Write binary output in static partitions +44 -5
5h ago C primes — Clean parallel worker bitmap assumptions +10 -13
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Selected Work
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#01
80,000 Hours
Joining as engineer. Career advising for the most pressing problems — now from London.
ACTIVE current
active
#02
Alignment Journal
A serious publishing venue for alignment research. Cofounder; currently sole engineer.
ACTIVE current
~19k lines 573 commits · last 90d
#03
ASTN
AI safety's career platform. One profile, smart recommendations, automatic recruiter matching.
ACTIVE current
~92k lines 940 commits · last 90d
#04
BAISH
The Buenos Aires AI Safety Hub. Cofounded; handing off as I move on — possibly staying on as advisor.
ACTIVE current
~14k lines 205 commits · last 90d
→ The full index Latest Writing
Essays, notes, half-baked theories
Instrumentation
Live · github · 15min cache
commits · 7d 17 last 0d ago
lines · 7d 13,505 additions + deletions
posts 1 published
projects 17 8 active · 6 shipped · 1 paused · 2 sunset
contribution heatmap · 52w github · all repos
52 weeks ago today →
commit stream · 7 days lines delta
lines changed per day13,505
Contact
Open to conversations, collaborations, and the occasional walk along the Thames.
If you're building something load-bearing in AI safety — or you need a site, a tool, or a second brain for a hard problem — I'm listening.
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