About zaimler
AI agents can't reason over data they don't understand. Enterprise data today is fragmented across dozens of systems with no shared context, meaning, or structure, and that's why most enterprise AI is failing. The shift from copilots to autonomous agents is creating an entirely new infrastructure layer, and we're building it.
zaimler is the context infrastructure for the agentic era: a platform that automatically discovers domain knowledge, maps relationships, and gives AI agents the semantic understanding to operate with precision at scale. Imagine knowledge graphs that support real-time inference, built for systems that need to reason, not just retrieve.
zaimler was founded by Biswajit Das (ex-VP Engineering, Truera), a Data Infra veteran and former Chief Architect at Visa, and Sofus Macskassy (ex-Director of Engineering, LinkedIn), who built one of the largest knowledge graphs in production in the industry at LinkedIn. We're a small, senior team at the seed stage, deploying with major enterprises across insurance, travel, and technology. If you want to build infrastructure that the next decade of AI runs on, we'd love to talk.
About the Role
You’ll join our ML team focused on turning raw enterprise data into structured, contextualized knowledge graphs and embeddings. You’ll develop novel and highly scalable algorithms for ML and data engineering to make our overall system more efficient, experiment with new approaches for distilling large models into smaller, more efficient ones; improve retrieval, ranking, and reasoning performance through feedback loops; and prototype methods that help LLMs extract and act on real-world knowledge.
We're looking for someone who thrives on iteration, cares about building with rigor, and is hungry to learn from some of the best engineers and researchers in the field.
What You’ll Be Doing
Develop new algorithms and data structures to improve extraction, tagging and resolutionCollaborate closely with infra and data engineers to scale your research into production-ready componentsPrototype and refine models for extracting structured knowledge from textApply knowledge distillation techniques to compress and optimize LLMs for downstream tasksExplore the use of reinforcement learning and feedback loops for improving model behaviorBuild evaluation pipelines for entity linking, retrieval, and semantic consistencyRead, implement, and build upon recent research in LLM alignment, distillation, and symbolic grounding
Prior Experience
2–4 years experience (research lab, internship, academic project, or early industry role) working in ML or NLPStrong fundamentals turning research papers, algorithms and mathematics into scalable and robust C++ codeSolid understanding of ML fundamentals: training pipelines, loss functions, evaluation metricsExposure to knowledge distillation, RLHF, or curriculum learning techniquesStrong Python skills and familiarity with ML frameworks like PyTorch or TensorFlowExperience with language models and transformers (e.g., BERT, LLaMA, or similar)A collaborative mindset and willingness to work across research and engineering teams
Nice to Have
Familiarity with reinforcement learning, including policy optimization or reward modelingFamiliarity with using and scaling algorithms to manipulate data, including graph algorithms, text-manipulation, embeddings.Experience with semantic representations such as knowledge graphs or entity embeddingsComfort working with tools like HuggingFace Transformers, Ray, or vLLMUnderstanding of small-model techniques (pruning, quantization, adapter layers)Interest in the LLM ecosystem and techniques for model alignment or prompt tuningPrior contributions to open-source projects or academic publications in ML/NLP
Why Join
A rare chance to be a founding engineer shaping both company and product direction.Competitive salary, benefits, and meaningful equity.Work alongside engineers and researchers from LinkedIn, Visa, Meta, and Branch.Onsite culture in San Mateo, designed for deep collaboration and high-velocity building.Full benefits package (Medical, Dental, Vision, 401k).We sponsor H-1B visas and assist with immigration processes.
We value builders over résumés. If this role excites you but you don't check every box, we still want to hear from you. zaimler is an equal opportunity employer.
