Senior ML Engineer

Remote - USA

You will partner closely with our Engineers, Product, and Design to productionize early-stage AI features into high quality, performant AI features that delight users at scale. Your focus will be on quality and safety testing: devising rigorous evaluation frameworks, refining prompts and pipelines, and optimizing model choices for cost, latency, accuracy, tone, and safety. You will help build the shared AI platform that powers products such as:

• AI Interviewer conversation loops that adapt in real time
• AI Fraud Signals that flag suspicious behavior with minimal false positives
• AI Candidate skills matrices and assistants that surface instant insights

• Design and own comprehensive evaluations that measure accuracy, completeness, style, hallucination rate, bias, and safety across every release.
• Tune and iterate on RAG pipelines, prompt chains, conversation loops, provider selections, and fine-tunes until quality bars are met or exceeded.
• Build reusable data and evaluation pipelines, a shared semantic layer, and monitoring dashboards that make it easy for product teams to ship reliable AI quickly.
• Optimize for cost and latency, continuously benchmarking models and negotiating trade-offs between performance and spend.
• Implement robust data governance and lineage practices that satisfy enterprise compliance requirements and support our AI bias audit process.
• Document best practices and share knowledge to raise the bar for AI development across BrightHire.

• 5+ years in Data Science or ML engineering with a strong focus on ML or NLP systems.
• 1+ year focused on Gen-AI or LLM systems.
• Strong Python and SQL skills.
• Experience creating automated evaluation suites for LLM outputs (accuracy, safety, bias, tone, style) and using results to guide iterative improvements.
• Knowledge of prompt engineering, RAG techniques, vector search, embeddings, fine-tuning, and model selection across multiple providers.
• Ability to communicate complex AI trade-offs clearly to engineers, designers, and executives alike
• Bias toward action, curiosity, and a passion for building high-quality user experiences

• High-impact projects in small, autonomous squads where you can lead platform initiatives or dive deep as a specialist
• Thoughtful developer experience with fast CI, 1-click deploys, strong observability, and clean codebases
• Sustainable remote culture: regular working hours, no-meeting Wednesdays, and flexible time off
• Collaborative, kind teammates who value learning and growth

• 100% covered healthcare for you + any dependents 
• Parental leave
• 401K
• Work-from-home stipend and quarterly snack deliveries
• Annual learning stipend and generous vacation stipend to recharge
• Competitive compensation, equity, and benefits package

Our company does not discriminate in employment on the basis of race, color, religion, sex (including pregnancy and gender identity), national origin, political affiliation, sexual orientation, marital status, disability, genetic information, age, membership in an employee organization, retaliation, parental status, military service, or other non-merit factor.