Founding AI/ML Research Engineer
RamAIn (YC W26)
RamAIn builds the world's fastest computer-use agents for enterprise work . We're a YC W26 company on a mission to eliminate repetitive, manual workflows by training AI agents that operate legacy systems, desktop apps, and web portals the same way humans do - but 10× faster and more reliably. Founders RamAIn was founded by Shourya Vir Jain (CEO) and Vansh Ramani (CTO), who met at IIT Delhi and dropped out to build AI-native automation for enterprise workflows. Shourya previously worked at McKinsey, where he saw firsthand how much enterprise work still depends on manual interaction with legacy systems. He is also a FIDE-rated chess player (2118), was ranked top-20 globally under 16, having previously built and scaled an enterprise AI company to over 6-figures in ARR. Vansh is an AI researcher who worked at CMU on scalable machine learning and representation learning. His research includes publications at ICLR and ACS, and “Panaroma,” one of the fastest vector search algorithms, later merged into Meta’s FAISS. He focuses on building high-performance reasoning and planning systems for real-world deployment. Together, they started RamAIn to build the fastest computer-use agents for enterprise work - combining deep research with production-grade systems that operate reliably across messy, real-world software environments. Role We're hiring an early-career Founding AI/ML researcher to join our core team and help build agents that reason, plan, and execute complex workflows autonomously. This role sits at the intersection of cutting-edge research and production systems - you won’t just prototype ideas, you’ll ship them to real enterprise customers. You might be a strong fit if you have a Bachelor's degree with exceptional hands-on experience building agentic systems or have recently completed a PhD or Master's in machine learning, AI, robotics or RL pipelines, multimodal models, or a related field. What you’ll work on Designing planning and reasoning architectures for long-horizon computer-use agents Training multimodal models that understand UI layouts, screenshots, and DOM structures Building fast action-selection systems that operate across messy, real-world software Improving reliability, latency, and robustness of deployed agents Running experiments and rapidly shipping improvements to production Expectations This is not a research-only role. Within your first few weeks, you’ll be shipping models, running experiments on real workflows, and seeing your work automate production tasks used by enterprise teams. We’re looking for someone who Moves quickly from idea → experiment → deployment Has built real AI agent orchestration systems Is excited about agentic AI, reasoning systems, experimentation or automation Thrives in a fast-moving early-stage startup environment You’ll work directly with the founders to push the frontier of computer-use agents and help define a new category of AI-native enterprise automation. #J-18808-Ljbffr RamAIn (YC W26)
$225k - $400k
A pioneering AI research firm is seeking a Founding Machine Learning Research Engineer in San Francisco to develop innovative AI systems for real-time voice agents. This high-impact role requires a strong ML research background and proficiency in PyTorch. Responsibilities...Suggested- ML/AI Research Engineer — Agentic AI Lab (Founding Team) Location: San Francisco Bay Area Type: Full-Time Compensation: Competitive salary + meaningful equity (founding tier) Backed by 8VC, we're building a world‑class team to tackle one of the industry’s most critical...SuggestedFull time
$140k - $200k
Join to apply for the Founding ML Research Engineer - Training Infrastructure role at Kalpa Labs (YC F25) This range is provided by Kalpa Labs (YC F25). Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range...SuggestedFull time$130k - $250k
Wildcard — Founding Applied ML Engineer Type: Full-time | On-site | San Francisco, CA Compensation: $130,... ...monetize how their products show up across AI shopping agents. It is building... ...outputs — product-grounded ML, not pure research or pure analytics. Momentum: Growing...SuggestedFull timeVisa sponsorshipShift work- ...crawled information on Google via point and click to AI agents doing real-time targeted crawling from... ...who can push the boundaries of what our ML systems can do. We’re hiring a Founding ML Engineer to own the research and engineering behind our core intelligence layer...SuggestedShift work
- Composite is seeking founding Machine Learning Engineers to enhance our proactive automation platform. In this role, you will improve model accuracy and... ...-edge technology in a small team, directly influencing the work lives of millions. #J-18808-Ljbffr Composite.ai
- A leading AI technology firm in San Francisco seeks a Founding ML Engineer to lead the research and engineering of their core AI systems. You will convert messy, multilingual web-scale data into structured intelligence, resolve data discrepancies, and train ML models from...
- ...building the data layer for AI-native healthcare and... ...the Role As an RL Engineer at BioStack, you will help... ...making, and biomedical research tasks. We’re looking... ...reinforcement learning and ML engineering experience,... ...closely with the founding team. You might thrive...Contract work
$160k - $250k
Join to apply for the Founding Research Engineer role at Adam Join to apply for the Founding Research Engineer... ...tackling a frontier problem: training AI models to intelligently interpret and... ...record of original contributions in ML (first-author papers, open-source projects...Full time- A media technology company in San Francisco is seeking a Founding Engineer specializing in ML Inference. This highly technical role requires expertise in the ML infrastructure stack and aims to optimize generative media performance. The ideal candidate will drive innovations...Relocation package
- Icehouseventures is looking for founding Machine Learning Engineers (MLEs) to enhance their core action models for a proactive automation platform. This role offers the chance to work closely on LLM inference, aiming for instant response times without IT friction. Join...
- A pioneering hedge fund in San Francisco is seeking a Founding ML Engineer to architect and build machine learning systems for investment decisions. This hands-on role requires 5-10+ years of experience and proficiency in Python and ML frameworks like PyTorch and TensorFlow...
$150k - $300k
An early-stage AI data company that went from zero... ...web. You will own the ML systems that turn that... ...tune encoder models from research paper through to... ...the full ML research and engineering cycle, from prototype to... ...with a direct path toward founding something of your own....$200k - $280k
A leading voice AI startup is seeking a Founding Senior Machine Learning Engineer to fine-tune and deploy human-like voice agents, handling millions of real-time calls... ...should have real-world experience in deploying ML models and work well in a fast-paced environment....- ...platform for understanding and improving how engineering teams work. We believe the way... ...is fundamentally broken and that modern AI can give teams a far more accurate and actionable... ...to accelerate our growth. As Weave’s Founding ML Engineer , your job is to build ML...
$150k - $230k
Triage is an applied research lab building adaptive security and... ...alignment infrastructure for AI systems: defending against novel... ...the Role We're hiring a Founding Research Engineer to drive the research agenda... ...prior industry experience in ML research or applied AI....Full time- Gravity Engineering Services Pvt Ltd. is looking for a Founding ML Engineer to lead the development of core ML intelligence systems. You will dive into the complexities... ..., making significant contributions to the way AI agents access real-time information. Experience in NLP...
$275k - $315k
...Company, we believe the future of AI and high-performance... ...AMD. We are partnering with researchers, engineers, and organizations who share... ...optimize machine learning. As a Founding Research Engineer focused on... ...intersection of compilers and ML. You'll design learned systems...Full timeWork at officeRelocation package$275k - $315k
SF Tensor in San Francisco is hiring a Founding Research Engineer focused on AI-driven compilation. You will develop reinforcement learning systems that optimize compiler decisions, design feedback loops, and run experiments. Ideal candidates have a strong background in...$150k - $230k
Triage is seeking a Founding Research Engineer in San Francisco to drive research for AI safety. You'll handle adversarial research, build training data infrastructure, and work on delivering effective detection systems. The role requires strong experience in LLM post-...- A leading AI infrastructure firm based in San Francisco is looking for engineers to join their founding core team. You will work directly with the founders to develop AI models that optimize network operations and anticipate failures. This unique position offers the opportunity...
$200k - $350k
An early-stage AI company in San Francisco is seeking a Machine Learning Research Engineer to own end-to-end research cycles. The role involves training models across creative... ...will have 2-6+ years of experience in ML research, strong skills in Python and PyTorch,...- Obsidian is seeking experienced Machine Learning Engineers and Researchers to evaluate AI agents on complex tasks. The ideal candidate will have a strong foundation in machine learning with at least 3 years of experience, preferably from a top-100 university or significant...
- A leading AI research company located in San Francisco is seeking an ML Research Engineer Intern. This role focuses on designing and implementing ML-driven features, optimizing evaluation pipelines, and collaborating with cross-functional teams. The ideal candidate is pursuing...Internship
- A leading AI company in San Francisco seeks a research engineer to enhance post-training ML models. You will develop in-house tools, work with diverse model architectures, and interact with various technologies including Kubernetes and GPU computing. The role offers competitive...
$350k
...reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial... ...is a quickly growing group of committed researchers, engineers, policy experts, and business leaders... .... About the role We are looking for ML Engineers and Research Engineers to help...Full timeWork at officeVisa sponsorship- A healthcare technology firm in San Francisco is looking for an experienced Research Scientist specializing in Machine Learning to advance clinical intelligence models. You will own research projects from start to finish, impacting real patient outcomes by developing novel...
$315k
We are seeking an innovative Research Engineer to lead the introduction of new interaction modes for Claude, our cutting-edge AI assistant, by combining expertise in Human-Computer Interaction (HCI), Design, and ML Research. This role presents an exciting opportunity to...Work at officeHome officeVisa sponsorshipRelocation package$200k - $350k
...partnering with a frontier AI startup We’re working... ..., and quality. The founding team is small, highly technical... ...at the intersection of research, product, and... ...Machine Learning Research Engineer , you’ll own end-to-end... ...years in post‑training, ML research, or ML...$200k
Skyrocket Ventures seeks a founding DevOps / Systems / ML Ops Engineer in San Francisco, CA. Hybrid work from home up to 2x/week with focus on AWS/Azure,... ...to $200k plus equity, in a small, fast-growing physical AI startup environment. You will spend roughly 50% on DevOps...Work from home
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