Windsurf
Research, Mid-Training
San Francisco · Mid
Sponsorship not specifiedDetected 82 days ago
PythonMachine LearningDeep LearningPyTorchData EngineeringLLMsStatisticsResearch
About the role
- We're the makers of Devin, the first AI software engineer, and Windsurf, the AI-native IDE.
- Together, they represent our vision for collaborative AI teammates that enable engineers to focus on more interesting problems and empower teams to strive for more ambitious goals.
- Among our founding team, we have world-class competitive programmers, former founders, and leaders from companies at the cutting edge of AI including Scale AI, Palantir, Cursor, Waymo, Tesla, Lunchclub, Modal, Google DeepMind, and Nuro.
Responsibilities
- Design and iterate on high-quality data mixtures for late-stage and annealing training runs.
- Develop principled methods for sourcing, filtering, and weighting data to sharpen model capabilities without degrading general performance.
- Drive targeted improvements in coding, mathematics, and long-horizon reasoning through curated data strategies and training interventions.
- Develop and evaluate synthetic data pipelines that generate training signal at scale.
- Understand the limits and failure modes of synthetic approaches and build methods that hold up in production training runs.
- Research and implement methods for extending effective context length without degrading short-context performance.
- Build evals that distinguish real capability improvements from benchmark overfitting.
- Develop new approaches when existing methods hit ceilings; we expect both rigorous empiricism and original thinking.
- We are an applied AI lab building end-to-end software agents.
- Building Devin is just the first step-our hardest challenges still lie ahead.
Requirements
- Hands-on experience with continual pre-training, annealing, or late-stage data mixing for large models
Benefits
- Research and optimize multi-stage learning rate schedules, warmup strategies, and compute allocation across training phases.
Equal opportunity
- Cognition is an equal opportunity employer.
- We do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other protected characteristic under applicable law.
- We are committed to providing reasonable accommodations for candidates with disabilities throughout the hiring process - please let us know if you need any.
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This listing is sourced directly from Windsurf's careers page and normalized into a canonical job model.