Research Engineer - Post-Training & Data Environments
Mercor
A leading AI development company in San Francisco seeks a Research Engineer to work at the intersection of engineering and applied AI research. In this role, you will enhance model performance through post-training and RLVR pipelines, design experiments, and build scalable systems. The ideal candidate has a strong applied research background, coding proficiency, and is excited to thrive in a high-intensity environment. Benefits include equity grants, housing bonuses, and generous stipends. #J-18808-Ljbffr Mercor
- ...The Frontier Evals & Environments team builds north star... ...loops to steer our training, safety, and launch decisions... ...We seek exceptional research engineers that can push the... ...(including the data contained therein) upon... ...you believe this job posting is non‑compliant, please...DataTraining
- Research Engineer, Virtual Collaborator at Anthropic - San Francisco, CA |... ...Research Engineers to help us train Claude specifically for... ...training on real organizational data and workflows. Your job will... ...reinforcement learning environments that transform Claude into the...DataTrainingWork at officeVisa sponsorshipFlexible hours
$250k - $350k
A leading AI research accelerator in San Francisco is seeking a Staff Research Engineer - Code to own the creation of datasets and reinforcement learning environments for AI labs. This hands-on leadership... ...candidates have expertise in post-training experiences, strong...DataTraining- ...vast talent network trains frontier AI models... ...’ll work alongside researchers, operators, and AI... ...Role As a Research Engineer at Mercor, you’ll work... ...directly to post‑training and RLVR, synthetic data generation, and large... ...real‑world production environments. You’ll shape rewards...DataTrainingWork at officeRemote work
- ML/AI Research Engineer — Agentic AI Lab (Founding Team) Location: San Francisco... ...AI Lab and lead the design, training, evaluation, and... ...sits on top of our enterprise data fabric. This isn’t a prompt... ...utilization across cloud and on‑prem environments Desired Experience Model...DataTrainingFull time
$177k - $197k
...role on our Innovation Engineering team — designing and... ...attorneys, business leaders, data scientists, and... ...deployments in sensitive data environments. Stakeholder... ...implementations, user training, and feedback loops to... ...contract review, or legal research, and prior law firm...DataTrainingContract workWorldwideFlexible hours$88k - $124k
...require more than just engineering, combining science... ...their careers through training and the development of... ...technical reports, including data analysis and... ...creating an inclusive environment for all employees.... ...right to cancel this posting at any time....DataTrainingFull timeTemporary workPart timeLocal area- ...innovative firm is seeking an Applied Research Engineer to advance AI alignment and improve data quality for AI models. In this... ...human feedback into AI training processes, ensuring models reflect... ...This position offers a dynamic environment where you can take ownership...DataTraining
- A leading AI technology firm in San Francisco is looking for a Research Engineer, Post-Training. This role involves optimizing AI models and developing algorithms to enhance data efficiency. Candidates should have a PhD or equivalent and experience with machine learning...DataTraining
- About the Role As a Research Engineer in our Reasoning team, you'll... ...working with synthetic data and teaching LLMs reasoning... ...anyone to create, train, and deploy them. This involves... ...it with a full RL post-training stack, including environments, secure sandboxes, verifiable...DataTrainingWorldwide
$315k
...California, seeking candidates for a role focused on language model training and evaluation. Ideal candidates should hold a Bachelor’s degree... ...familiarity with performance optimization and large scale data pipelines. The company offers a salary range of $315,000 to $560...DataTrainingWork at office$300k
Want to build the large-scale RL environments frontier labs use to train agents that can truly reason and act? This team are creating... ...for intelligent behaviour. It’s open-ended, research-driven work where the task definition, data, and reward structure are often the hardest...DataTraining$175k - $250k
...push the boundaries of AI research and development. Their mission... .... The Role: As a Research Engineer in Pre-Training, you'll develop and... ...strategies, and large-scale data pipelines to drive AI innovation... ...trained models in production environments. This is a fully on-site...DataTrainingFull timeRelocation package$350k
...qualified candidate to join their Domain Scaling team. This unique role involves refining AI model capabilities through applied research and data sourcing in various sectors such as finance and healthcare. The ideal candidate will have experience in fine-tuning large...Data- As an Applied Research Engineer , you'll design and build advanced systems to collect, analyze, and optimize human-in-the-loop data for training cutting-edge AI models. Your work will focus on techniques such as Reinforcement Learning from Human Feedback (RLHF), Direct...DataTrainingWork from home
$350k
...legal. This unique role blends applied research with data sourcing to enhance our models. You... ...process of creating reinforcement learning environments for new capabilities: identifying high... ...to‑end, from task sourcing through RL training. Manage technical relationships with...DataTrainingVisa sponsorship$150k - $230k
Triage is an applied research lab building adaptive security... ...a Founding Research Engineer to drive the research... ...product. The sentries we train become the detectors... .... Active threads span post‑training (reinforcement... ...discoveries into training data Train, evaluate, and...DataTrainingFull time- Join to apply for the Research Engineer role at Jobright.ai 2... ...infrastructure to support model training, experimentation, and... ...(distributed systems, data storage, performance... ...in a zero-to-one environment. Company: OpenAI... .../ Research Scientist, Post-Training Research Scientist...DataTrainingFull timeInternshipH1b
$200k
As a Research Engineer at Metis, you’ll work on building the next generation of autonomous post-training systems that leverage our Mantis platform. You’ll operate at the intersection... ...AI agents learn from feedback, synthetic data, and real-world interactions. You’ll move...DataTraining- ...18, weve led the charge in data-centric AI developmentcombining... ...for high-quality training data at scale. Expert Marketplace... ...Excellence: Join a team of top researchers and engineers passionate about ethical AI... ...career in a high-caliber environment. Clear Ownership: Take...DataTrainingFlexible hours
$160k - $250k
...apply for the Founding Research Engineer role at Adam Join to... ...tackling a frontier problem: training AI models to... ...faster CAD edits Create RL environments to teach long-horizon... ...the full AI stack, from data collection to model... .../ Research Scientist, Post-Training Research Engineer...DataTrainingFull time- BioStack is building the data layer for AI-... ...for model training, evaluation, and deployment... ...the Role As an RL Engineer at BioStack, you... ...engine and RL environment layer for medical... ...making, and biomedical research tasks. We’re... ...learning, language model post-training, agent...DataTrainingContract work
$231k - $340k
Role Overview Post-training is how Harvey turns expert feedback and agent traces into... ...at legal work. We are looking for a research engineer who can help scale that loop: defining... ...research partners to build better data, environments, graders, and training recipes. This...DataTraining$350k
...needs and goals. We are scientists, engineers, and builders who’ve created some... ...fine‑tuning API that empowers researchers and developers to customize... ...allowing Tinkerers full flexibility in training open weights models with their own data, algorithms, and for their own...DataTrainingVisa sponsorshipWork visaRelocation package$315k
...should have familiarity with language model training, evaluation, and inference. Familiarity... .../container deployment, and large scale data pipelines is highly encouraged. The expected... ...every single qualification as listed. Research shows that people who identify as being from...DataTrainingWork at officeVisa sponsorshipFlexible hours- ...Firecrawl's core product — building the training infrastructure, reward pipelines,... ...understanding, and structuring web data. This isn't theoretical RL research. You'll build your own training... ...translate your work into language that engineers, product people, and leadership can...DataTraining
$100k - $300k
...failing. We believe massive scale through data-driven machine learning is the key to... .... Position Overview We are hiring Research Engineers to develop scalable robotic systems aimed... ...Develop and implement new algorithms for training and optimizing general-purpose robot...DataTrainingFull time$350k
...team at the intersection of research and engineering, investigating safety... ...analyses over model usage data to surface abuse patterns,... ...agentive workflows, and for training the model to robustly refrain... .... Experience with agentic environments and evaluating model behavior...DataTrainingVisa sponsorship$170.11k - $237k
...revolution. We’re hiring exceptional Software Engineers and Research Engineers (or hybrids of the two) to... .... Solid fundamentals in algorithms, data structures, system design Domain... ...engineering aspects of LLMs (e.g. distributed training, autoscaling inference etc)...DataTrainingWork at officeFlexible hours$350k
...is a quickly growing group of committed researchers, engineers, policy experts, and business leaders... ...redesign how Claude interacts with external data sources. Many of the paradigms for how... ...for how information is organized, and train language models to optimally use those...DataTrainingVisa sponsorshipFlexible hours
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