Research Engineer, Infrastructure, Training Systems Thinking Machines Lab IncResearch Engineer, Infrastructure, Training SystemsSan Francisco, CA$350,000–$475,000 / yearWe are scientists, engineers, and builders who've created some of the most widely used AI products, including ChatGPT and Character.ai, open-weights models like Mistral, as well as popular open source projects like PyTorch, OpenAI Gym, Fairseq, and Segment Anything. Preferred qualifications - we encourage you to apply if you meet some but not all of these: Past experience working on distributed training for the world's largest models to make them stable, reliable, and performant.
Research Engineer DepthFirstResearch EngineerSan Francisco, CaliforniaWork on a Product that Solves a Critical Problem - and we already have a handful of customers who have found it valuable in fixing some eye-opening vulnerabilities within the first few days of using our product. Our founding team includes deep expertise in data, infrastructure, security and LLMs with technical leaders from DeepMind, Databricks, Square, and Faire.
Machine Learning Research Engineer, Model Evaluation WindBorne SystemsMachine Learning Research Engineer, Model EvaluationPalo Alto, CaliforniaWindBorne Systems is supercharging weather forecasts with a proprietary data source: a global constellation of next-generation smart weather balloons targeting critical atmospheric data. Evaluation strategy — Work with our Meteorology team to develop a rigorous, meteorologically valid strategy for comparing WeatherMesh with leading AI and physics-based models.
Research Engineer - Evaluations Luma AI, Inc.Research Engineer - EvaluationsRedwood City, CAAs a Research Engineer on Evaluations, you'll build the pipelines, metrics, and automated systems that close the loop between model output, measurement, and improvement, so every model decision is grounded in rigorous, consistent signal. Days 1-30 - Immerse & Diagnose: Map how models are evaluated today, where the gaps and manual steps are, and which signal matters most to model development.
Research Engineer Gamma Tech, Inc.Research EngineerSan Francisco, CA$180,000–$340,000 / yearAs our Research Engineer, you'll design evaluation frameworks that measure AI output quality, systematically improve production prompts, and fine-tune models to ensure millions of users get exceptional results every time they generate content. Systematically improve production prompts through iterative experimentation, diagnosing failure patterns, crafting targeted improvements, and validating against quality benchmarks.
Post-Training Research Engineer Baseten Labs IncPost-Training Research EngineerSan Francisco, CAThe Post-Training team is responsible for the success of our customers post-trained models, and we employ a wide array of techniques to produce models that are more efficient and higher quality than even the biggest closed source models for the customers specific needs. At times this involves zooming deep into a particular technical topic, but more often it involves working across the stack as a whole - systems-level concepts like Kubernetes, cgroups, storage systems, and networking topologies, as well as PyTorch distributed tensor computation, and GPU kernels.
Machine Learning Research Engineer WindBorne Systems IncMachine Learning Research EngineerRedwood City, CAWeather forecasting presents unusually rich machine learning problems: enormous, messy datasets; imperfect ground truth; complex physical structure; and models that must work reliably in the real world. WindBorne Systems is supercharging weather forecasts with a proprietary data source: a global constellation of next-generation smart weather balloons targeting critical atmospheric data.
Software Engineer, ML Research Anysphere IncSoftware Engineer, ML ResearchSan Francisco, CAPlease write a short note on a project youre proud of: Will you now or in the future require visa sponsorship to work in the country where this position is located?. About the role Were looking for Research Engineers to build the training, inference, and data systems behind our frontier coding models.
Founding AI Research Engineer - Robot Learning OriginFounding AI Research Engineer - Robot LearningSan Francisco, CA$100,000–$300,000Our robots are already deployed on live sites in New York City, helping accelerate schedules for large-scale commercial projects while improving safety and predictability on the job site. Backed by Tier-1 investors, Origin is working to close the gap between America’s surging demand for housing, data centers, and manufacturing infrastructure, and the construction industry’s growing labor shortage.
NewAI Research Engineer - Agentic AI Robert Bosch GmbHAI Research Engineer - Agentic AISunnyvale, CAThe Bosch Research and Technology Center North America with offices in Sunnyvale, California, Pittsburgh, Pennsylvania, and Cambridge, Massachusetts is a part of the global Bosch Group (www.bosch.com), a company with over 70 billion euro revenue, 400,000 employees worldwide, a very diverse product portfolio, and a history spanning over 125 years. The Research and Technology Center North America (RTC-NA) is dedicated to providing technologies and system solutions for various Bosch business fields, primarily in the field of artificial intelligence, energy technologies, internet technologies, circuit design, semiconductors and wireless, as well as advanced MEMS design.
Principal Research Engineer, Model Training & Post-Training Inflection AI IncPrincipal Research Engineer, Model Training & Post-TrainingPalo Alto, CA$400,000–$550,000 / yearLead training and post-training strategy, including supervised fine-tuning, RLHF, DPO, GRPO, RLAIF, reward modeling, preference optimization, tool-use fine-tuning, distillation, synthetic data, and related methods. Inflection's models are central to our product and platform strategy, and we are looking for a hands-on technical leader to own the model-improvement loop from data and training through evals, post-training, release criteria, and production feedback.
Research Engineer, Real Environments MercorResearch Engineer, Real EnvironmentsSan Francisco, CaliforniaBuild end-to-end environments for labs & enterprises by platformizing sandbox app clones, load real data into the sandboxes, build prompts from real workflows, and write verifiers leveraging enterprise expertise & golden outputs. Mercor Enterprise brings this same infrastructure to Fortune 500 companies: helping companies capture how their best people actually work, translating that expertise directly back into agents.
Research-Engineer%2C-Offshore-&-Marine-Engineering%2C-TCOMS Agency for Science, Technology and ResearchResearch-Engineer%2C-Offshore-&-Marine-Engineering%2C-TCOMSCADevelop and maintain LabVIEW applications for data acquisition (DAQ), real-time monitoring, sensor signal visualization, automated testing workflows, data logging and reporting. Collaborate with industry partners, affiliated research institutes and other relevant stakeholders to contribute to grant proposals for research funding consistent with the strategic goals of TCOMS.
Research Engineer - Reinforcement Learning Prime IntellectResearch Engineer - Reinforcement LearningSan Francisco, CaliforniaOur platform, Lab, unifies compute, environments, evaluations, secure sandboxes, high-performance training, and deployment into one full-stack system for post-training at frontier scale - from SFT and RL to tool use, agent workflows, and continuously improving production models. We are building open frontier AI: open-source models trained end to end for long-horizon tasks like autonomous research, and the full-stack platform our own research team uses to build them.
Founding Applied Research Engineer Rox Data CorpFounding Applied Research EngineerSan Francisco, CaliforniaBuild evaluation frameworks that measure trajectory quality, not just final output, because most eval infrastructure measures end results and we care about the path. A small, fast classifier that distinguishes genuine buying signals from noise across the news, jobs, and filings corpus we already ingest at scale.
Research Engineer, Data Infrastructure Mistral AIResearch Engineer, Data InfrastructureSan Francisco, CAOperational Excellence: Use modern deployment workflows to manage cloud-native deployments, ensuring our data platform can scale by orders of magnitude while remaining reliable and efficient. You will help us move toward a future of decoupled control and data planes, scaling big data compute and storage platforms while ensuring secure and governed data access for MLOps and research.
Research Engineer, Code Agents Infra Mistral AIResearch Engineer, Code Agents InfraPalo Alto, CAYou will tackle the engineering challenges at every step of the agent lifecycle: from orchestrating 1M+ concurrent and short-lived sandboxes for untrusted code execution to optimizing agent training codebases, distributed trajectory collection pipelines, and dataset processing workflows across massive hybrid and multi-cloud clusters. Training Codebase & Systems Optimization: Optimize agent training codebases and distributed execution runtimes (PyTorch, Ray, SLURM/Kubernetes) to minimize multi-step rollout overhead, improve GPU utilization, and eliminate scaling bottlenecks.
AI Lab Research Engineer Lila Sciences IncAI Lab Research EngineerSan Francisco, CA$148,000–$240,000 / yearFull-time U.S. employees receive a comprehensive benefits program including medical, dental, and vision coverage; employer-paid life and disability insurance; flexible time off with generous company wide holidays; paid parental leave; an educational assistance program; commuter benefits, including bike share memberships for office based employees; and a company subsidized lunch program. LILA combines advanced AI models with proprietary AI Science Factory instruments into an operating system for science that executes the entire scientific method autonomously, accelerating discovery at unprecedented speed, scale, and impact across medicine, materials, and energy.
Research Engineer – Agent Product Engineer Transparent Search GroupResearch Engineer – Agent Product EngineerSan Francisco, CaliforniaCandidates can come from a front-end/design engineering background or an AI engineering background, but both must have prior experience building and designing agents, preferably at a startup with 0-1 product ownership. While traditional observability focuses on logging exceptions and latency, Judgment's ABM surfaces behavioral anomalies — instruction drift, context retrieval loss — in production at scale.
Senior/Staff Research Engineer, Perception Gatik AI, Inc.Senior/Staff Research Engineer, PerceptionMountain View, CAGatik enables our customers to optimize their hub-and-spoke operations, enhance service levels and product flow across multiple locations while reducing labor costs and meeting an unprecedented expectation for faster deliveries. Design and implement cutting-edge perception algorithms for autonomous vehicles, focusing on areas such as sensor fusion, 3D object detection, segmentation, and tracking in complex dynamic environments.