LiveKit - Research Engineer (Reinforcement Learning)
Requirements
• A strong Python engineer • Have carried a model from raw data through to production • Treat data as the product: coverage, diversity, leakage • Assume a model will exploit a weak reward, and design against it • Comfortable with GPUs and honest about their limits • Know when to train, and when not to • Comfortable working collaboratively in a remote environment • Experience with post-training: fine-tuning, reward design, or reinforcement learning such as GRPO • RL and fine-tuning frameworks such as TRL, verl, or OpenRLHF, or a training loop you wrote yourself • Fast rollouts with vLLM or SGLang, multi-GPU training with FSDP • Training tool-using or multi-turn agents • Execution sandboxes, verifiers, eval harnesses, or tooling other engineers depend on • Open-weight families such as Qwen or Llama, LoRA and similar • Our Commitment to You
Responsibilities
• Build the environments and verifiers our models train against • Own the synthetic data pipeline, from generation through the quality gates • Run training experiments end to end, and explain what moved the model • Build the evaluations a release has to clear • Choose and adapt open-weight base models for our tasks • Make trained behavior hold up for voice and text agents alike • Ship models into production and keep improving them on real usage
Benefits
• $135K – $300K • Offers Equity • As a globally distributed engineering team, our posted range covers differences across international markets and levels. Final compensation depends on your location, seniority, and technical depth evaluated throughout our process. • Upload your resume here to autofill key application fields. • Drop your resume here! • Parsing your resume. Autofilling key fields... • or drag and drop here • Tell us about you and why you're excited to apply to this specific role at LiveKit • Tell us about a project you're proud of! • Decline to self-identify • Hispanic or Latino - A person of Cuban, Mexican, Puerto Rican, South or Central American, or other Spanish culture or origin regardless of race. • Hispanic or Latino • White (Not Hispanic or Latino) - A person having origins in any of the original peoples of Europe, the Middle East, or North Africa. • White • Black or African American (Not Hispanic or Latino) - A person having origins in any of the Black racial groups of Africa. • Black or African American • Native Hawaiian or Other Pacific Islander (Not Hispanic or Latino) - A person having origins in any of the peoples of Hawaii, Guam, Samoa, or other Pacific Islands. • Native Hawaiian or Other Pacific Islander • Asian (Not Hispanic or Latino) - A person having origins in any of the original peoples of the Far East, Southeast Asia, or the Indian Subcontinent, including, for example, Cambodia, China, India, Japan, Korea, Malaysia, Pakistan, the Philippine Islands, Thailand, and Vietnam. • Asian • American Indian or Alaska Native (Not Hispanic or Latino) - A person having origins in any of the original peoples of North and South America (including Central America), and who maintain tribal affiliation or community attachment. • American Indian or Alaska Native • Two or More Races (Not Hispanic or Latino) - All persons who identify with more than one of the above five races. • Two or More Races • Hispanic or Latino • White (Not Hispanic or Latino) • Black or African American (Not Hispanic or Latino) • Native Hawaiian or Other Pacific Islander (Not Hispanic or Latino) • Asian (Not Hispanic or Latino) • American Indian or Alaska Native (Not Hispanic or Latino) • Two or More Races (Not Hispanic or Latino) • I identify as one or more of the classifications of protected veteran listed above • I am not a protected veteran
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