AI Lab: 500+ Engineers Across 4 Regions

Challenge
An SF based AI company powering large-scale model training through RLHF and data labeling needed to rapidly scale its engineering workforce while maintaining exceptionally high standards. They required engineers across multiple technology stacks - Python, JavaScript, Java, Golang, C++, Rust, and PHP - sourced from Latin America, Europe, MENA, and Asia to support their global operations.

How DevSignal helped

• Phased scaling: Started with 50 engineers, then 250, eventually expanding to more than 500 as their AI training operations grew.
• Rigorous vetting: Leveraged our global talent pool, regional recruiters, and technical vetters to sustain a 90%+ pass-through rate on the client’s toughest technical evaluations.
• Top engineers: Delivered engineers with expertise across 7 core stacks, from competitive programming to large-scale systems, ready to contribute immediately.

Results

• Rapidly scaled from 50 → 500+ engineers without compromising quality.
• Over 90% of engineers presented passed the client’s rigorous technical evaluation.
• Enabled the client to accelerate AI training without internal hiring bottlenecks.
• Partnership continues today, with DevSignal supporting ongoing global talent acquisition needs.