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Sesame is designing a new kind of computer focused on making voice companions part of our daily lives, aiming for computers to be lifelike with the ability to see, hear, and collaborate naturally. The job is to help build and deploy the state-of-the-art voice models that power this real-time companion experience.

Requirements

• Expert-level PyTorch.
• Proven software engineer who loves ML; comfortable writing production code across the stack.
• Hands-on experience training or fine-tuning large language or other large-scale models with a variety of techniques.
• Evaluation expert — you’ve designed metrics and harnesses that actually predict user happiness.
• Deep knowledge of the ML lifecycle: dataset ops, training pipelines, eval frameworks, deployment, and monitoring.
• History of shipping complex projects to production—especially user-facing, online ML systems—despite shifting requirements and surprise roadblocks.

Responsibilities

• Own evaluation pipelines — design, build, and automate offline and live evals that keep our speech and multimodal models honest in production.
• Harness the data — create tooling for safe, versioned, privacy-aware dataset curation and discovery.
• Ship models, not slide decks — partner with research and infra to prototype, train, and deploy state-of-the-art voice models that power Sesame’s real-time companion experience.
• Squeeze silicon — scale training and inference for LLM-class workloads; chase latency, throughput, and cost until the graphs flatten.
• Wire up monitoring and live evals — surface quality regressions before users or PMs notice.
• Move at startup speed — take ideas from whiteboard to production in days, not quarters; leave a clean trail of tests and dashboards behind.

Other

• High agency and the judgment to know when to sprint solo vs. pull in the squad.
• Track record of setting technical direction, driving consensus, and partnering smoothly with product, infra, and research.
• We welcome all qualified applicants, embracing diversity in race, gender, identity, orientation, ability, and more.
• We provide reasonable accommodations for applicants with disabilities—contact careers@sesame.com for assistance.
• 401k matching
• 100% employer-paid health, vision, and dental benefits
• Unlimited PTO and sick time
• Flexible spending account matching (medical FSA)