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67 open listings · Page 3 of 3
Roles posted by organizations here, alongside roles we found on employers’ own careers sites. Crawled roles say so on the card and send you to the employer to apply. Only show organizations on Career App
Menlo Ventures Portfolio
Full-time · New York, NY · $500,000 – $850,000
This role combines research and engineering to advance Claude's ability to write and debug code through reinforcement learning. You'll design RL environments, build reward systems, run training experiments, and optimize the infrastructure that powers these systems, working across agentic coding behaviors, correctness, and performance optimization.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗
Menlo Ventures Portfolio
Full-time · San Francisco, CA · $500,000 – $850,000
Lead the development of evaluation systems for production large language models at Anthropic, focusing on measurement quality and providing observability into post-training processes. This role suits experienced ML researchers or engineers who care deeply about benchmarking rigor and can advise teams across a complex organization on evaluation methodology.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗
Menlo Ventures Portfolio
Full-time · New York, NY · $500,000 – $850,000 · Remote
Build and optimize the infrastructure and tooling that powers Anthropic's reinforcement learning research, working across the full stack to eliminate bottlenecks and enable researchers to iterate faster. This role suits engineers who excel at systems work, distributed computing, and enabling others' productivity through thoughtfully designed platforms rather than individual experiments.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗
Menlo Ventures Portfolio
New York, NY · $350,000 – $850,000
This role owns the complete pipeline of creating training data and reinforcement learning environments to improve visual reasoning in large language models, partnering across teams to translate research into real-world capabilities. You'll combine applied research with hands-on data work, managing vendor relationships, designing reward systems, and running experiments to measure how data strategy improvements enhance multimodal model performance.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗
Menlo Ventures Portfolio
Full-time · New York, NY · $500,000 – $850,000
Anthropic is hiring a Research Engineer to advance AI capabilities in secure coding and vulnerability remediation, combining RL research with production implementation. The role suits cybersecurity specialists interested in how AI can enhance defensive work, or ML practitioners with security expertise who want to shape safe AI systems.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗
Menlo Ventures Portfolio
Full-time · San Francisco, CA · $315,000 – $560,000
This role builds the computational infrastructure and tooling that lets researchers understand how large language models actually work internally, rather than treating them as black boxes. It's suited to experienced software engineers who want to work on AI safety through hands-on infrastructure work, enjoy translating research needs into systems, and are comfortable optimizing across the full stack from GPU kernels to user-facing tools.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗
Menlo Ventures Portfolio
Full-time · New York, NY · $500,000 – $850,000
Join Anthropic's RL Engineering team to build and improve the reinforcement learning training system that powers Claude's capabilities. This role offers the chance to work across the full ML stack on production-scale systems while collaborating with research teams across the company.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗
Menlo Ventures Portfolio
Full-time · New York, NY · $350,000 – $500,000
This role combines software engineering with machine learning research, building large-scale systems for safe AI at Anthropic. You'll optimize infrastructure, run experiments, and develop tools across the full stack, suited for engineers who understand research context and want to grow their ML expertise.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗
Menlo Ventures Portfolio
New York, NY · $350,000 – $500,000
This role involves building ML systems to detect and prevent misuse of AI models, from individual policy violations to coordinated attacks, plus developing defenses and safety evaluations for increasingly capable AI systems. It suits engineers or researchers with 4+ years of ML experience who want to work on AI safety and are comfortable moving from research prototypes to deployed systems.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗
Menlo Ventures Portfolio
Full-time · San Francisco, CA · $350,000 – $850,000
This role involves keeping Anthropic's large-scale language model training pipelines running reliably and efficiently, requiring someone comfortable operating production systems during launches while also contributing research improvements to the training stack. It suits engineers who enjoy both debugging complex infrastructure problems and designing experiments to optimize model performance.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗
Menlo Ventures Portfolio
Full-time · New York, NY · $350,000 – $850,000 · Remote
Anthropic is hiring a research engineer to work on large language model pre-training, combining cutting-edge ML research with practical system engineering. The role suits someone who wants to contribute to safe AI development while working on problems spanning model architecture, training infrastructure, and algorithmic innovation.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗
Menlo Ventures Portfolio
San Francisco, CA · $350,000 – $850,000
This role involves building infrastructure systems to train, evaluate, and deploy AI models at Anthropic, working across the full stack from data pipelines to performance optimization. It suits experienced infrastructure engineers comfortable with distributed systems, containerization, and large-scale ML workloads who want to contribute to AI safety research.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗
Menlo Ventures Portfolio
Full-time · San Francisco, CA · $350,000 – $850,000
Anthropic seeks a Research Engineer to work across their full ML stack, tackling foundational challenges in building AI systems capable of scientific reasoning and complex problem-solving. This role bridges research and engineering, requiring deep expertise in language models, distributed systems, and performance optimization to scale prototypes into production systems.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗
Menlo Ventures Portfolio
Full-time · San Francisco, CA · $350,000 – $500,000
This role involves designing and executing machine learning experiments to understand and improve the safety of advanced AI systems, particularly focusing on risks from highly capable models. You'll be part of a research team tackling problems like scalable oversight, AI control, and alignment stress-testing, requiring both scientific rigor and engineering skill.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗
Menlo Ventures Portfolio
Full-time · New York, NY · $350,000 – $500,000
This role involves implementing and optimizing post-training techniques for Anthropic's large language models, translating research methods like Constitutional AI and RLHF into production systems. It suits engineers who combine strong software skills with deep learning expertise and thrive balancing research innovation with operational reliability at scale.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗
Menlo Ventures Portfolio
Full-time · New York, NY · $500,000 – $850,000
This role is for a machine learning engineer to build and optimize reinforcement learning systems that make language models more capable and safer, working on everything from training infrastructure to novel RL techniques. It suits someone who enjoys moving fluidly between research exploration and production engineering, with strong systems thinking and Python expertise.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗
Menlo Ventures Portfolio
Full-time · New York, NY · $350,000 – $850,000 · Remote
Anthropic is seeking a research engineer to architect and optimize how large language models access and use external data sources. This role combines system design, machine learning, and software engineering to build novel data organization strategies and train models to effectively leverage them.
Listed on Menlo Ventures Portfolio’s careers site · Apply there ↗