Software Engineer - ML Infrastructure Epsilon HealthSoftware Engineer - ML InfrastructureSan Francisco, CaliforniaBuild the reinforcement learning training stack (high-throughput rollout generation, reward-model serving, and experience collection), enabling the research team to run online, multi-reward RL at scale. Partner with researchers to prototype new ideas and translate them into production-ready code , owning end-to-end delivery from experimentation through deployment and monitoring.
Software Engineer - Core Systems Epsilon HealthSoftware Engineer - Core SystemsSan Francisco, CaliforniaThe actual base salary offered depends on a variety of factors, which may include as applicable, the qualifications of the individual applicant for the position, years of relevant experience, specific and unique skills, level of education attained, certifications or other professional licenses held, and the location in which the applicant lives and/or from which they will be performing the job. We're looking for Software Engineers to help us build and operate the core infrastructure that powers Epsilon Health, composed of 3 major components: an ingestion pipeline, a data warehouse / pipeline and a distributed inference system.
Research Scientist - VLM Pretraining Epsilon HealthResearch Scientist - VLM PretrainingSan Francisco, CaliforniaThis role owns the pretraining stage of our radiology report generation model: VLM architecture design, multimodal data and task mixtures, and the large-scale training runs that build grounded visual understanding across X-rays, CT scans, and MRI. You'll work with one of the largest and most diverse medical imaging datasets in the industry, paired with the reports that make multimodal pretraining at this scale possible, while maintaining the clinical rigor required for healthcare deployment.
Research Engineer - Data Quality & Evals Epsilon HealthResearch Engineer - Data Quality & EvalsSan Francisco, CaliforniaBuild data filtering and curation pipelines that keep VLM and classifier training sets clean, detecting label noise, misaligned image-report pairs, duplicates, corrupted studies, and low-quality samples at scale. Design evaluation methodology for report generation that goes beyond surface-level text overlap, measuring clinical accuracy through entity and relation extraction, hallucination and omission rates, and adherence to reporting style.
Research Scientist - Post-training / RL Epsilon HealthResearch Scientist - Post-training / RLSan Francisco, CaliforniaExtend reinforcement learning to unverifiable and noisy objectives such as report quality and clinical usefulness, using learned reward models and radiologist feedback pipelines ( RLHF ) built on expert preferences and report edits. This role owns every stage after pretraining: supervised fine-tuning, reward modeling, reinforcement learning against verifiable and learned reward signals, reasoning and tool-use training, and inference-time strategy.
Software Engineer - Product Epsilon HealthSoftware Engineer - ProductSan Francisco, CaliforniaThe actual base salary offered depends on a variety of factors, which may include as applicable, the qualifications of the individual applicant for the position, years of relevant experience, specific and unique skills, level of education attained, certifications or other professional licenses held, and the location in which the applicant lives and/or from which they will be performing the job. Fully manage medium-to-large projects independently by having deep experience in domain knowledge, both functionally or technically, and make independent design decisions.
Environmental Project Manager - Energy Epsilon Associates IncEnvironmental Project Manager - EnergyMaynard, MA$85,000–$130,000 / yearIn this role, you will: Lead and manage federal, state and local environmental permitting efforts with an emphasis on the Clean Water Act, MA Wetlands Protection Act and municipal wetlands protection bylaws; Assist with business development and client management; Oversee and conduct complex wetland delineations and ecological field work; Conduct inspections to ensure compliance during construction; Represent clients and Epsilon at public meetings, agency workshops, and stakeholder sessions; and Mentor junior staff. Epsilon is looking for an experienced environmental professional to lead and manage permitting and ecological survey efforts for energy and infrastructure projects within Massachusetts and surrounding states.