Joel Pobar
Joel Pobar is a software engineer whose systems work spans Facebook's runtime tools and AI infrastructure. At Facebook, he improved HHVM and joined the teams behind Hack and its web development environment, FBIDE. His Meta experience includes work on PyTorch; in 2024 he led infrastructure initiatives at Anthropic and served as a Venture Partner at TEN13. He is part of Meta Superintelligence Labs, which hired him in June 2025 after Anthropic inference work and 11 years at Meta.
Timeline
-
2013
HHVM at Facebook
In 2013, he improves Facebook's HHVM, a PHP virtual machine, as his team updates it every two weeks. Before Facebook, he develops software for Sun Microsystems and Microsoft.
-
March 2014
Hack for HHVM
Facebook releases Hack, a programming language for HHVM that interoperates with PHP, in March 2014; he is part of the core Hack team.
-
April 2014
A web IDE for Hack
At Hack Developer Day in April 2014, he and Joel Beales introduce FBIDE, a web-based Hack environment with autocomplete, a debugger, and code search.
-
December 2024
Anthropic infrastructure work
In December 2024, he leads infrastructure and engineering initiatives at Anthropic, building on Meta experience that includes PyTorch work.
-
December 2024
TEN13 Venture Partner
As TEN13's Venture Partner in December 2024, he helps shape the firm's global AI investment strategy.
-
Since 2025
Meta Superintelligence Labs
In June 2025, he joins Meta Superintelligence Labs after working on inference at Anthropic; his earlier Meta career spans 11 years in engineering.
Sources and credits
Photo: We have no published photo of Joel Pobar yet. Send us a free-licensed photo.
- How Facebook ships software at warp speed
- Hack: a new programming language for HHVM
- Hack Developer Day Recap
- Fireside chat with Joel Pobar, Anthropic + Matt Lennie, Meta
- Key takeaways from Mark Zuckerberg's memo on Meta's 'Superintelligence' AI push and big hires
- Meta restructures its AI unit under ‘Superintelligence Labs’
- TEN13 Runway AI Breakfast powered by Vanta