Weekly digest
Week of 27 October 2025
24 new roles this week across 11 companies; the biggest movers: Substrate (+5), OpenAI (+4), Etched (+4).
Research
- Member of Technical Staff, Evals & Post-Training Product — Fireworks AI Inference engine for deploying and fine-tuning open-source AI models with low-latency, high-throughput serving
- Forward Deployed Engineer, Lead - LLM Post-training — Reflection AI Builds open AI models that enable anyone to control and shape intelligent systems
- Applied Research Engineer — Applied Compute Platform for training, deploying, and improving custom AI agents on enterprise data
- Research Scientist — Applied Compute
- Research Scientist, AI — Substrate Builds next-generation semiconductor fabrication technology to extend Moore's Law and reduce fab costs
ML engineering
- Senior ML Compiler Engineer — Fractile Builds specialized processors that fuse computation with memory to run large language models up to 25x faster
- ML Runtime Engineer — Fractile
- Training: ML Framework Engineer — OpenAI Develops AI systems including large language models like ChatGPT for research and commercial use
Infrastructure
- Staff+ Software Engineer, Infrastructure (Distributed Systems) — Anthropic Develops Claude, an AI assistant, with research focused on AI safety and alignment
- Offensive Security Engineer, Agent Products — OpenAI
Software
- Member of Technical Staff - Mid-training — xAI Develops Grok, an AI platform offering reasoning, code, voice, image, and video capabilities through a unified
- Senior Firmware Engineer (Taiwan) — Etched Etched.ai is a technology startup developing specialized hardware for large language model (LLM) inference
- Modelling Engineer — Fractile
- Design Verification Engineer — OpenAI
- Software Engineer, Hardware — OpenAI
- Electromechanical Engineer — Substrate
- Firmware Engineer (Taiwan) — Etched
- Supercomputing Software Engineer (Taiwan) — Etched
- Supercomputing Test Software Engineer (Taiwan) — Etched
- Digital IC Design Engineer Intern — Neuralink Develops implantable brain-computer interfaces enabling paralyzed individuals to control devices through thoug
Hardware
Product
Design
Go-to-market
- GTM Lead — WithCoverage Digital platform for managing insurance policies, claims, and risk for CPG brands and growing businesses
Every line links to the role on Liftoff Jobs, and from there to the company's own board. · Past issues · Search the whole index
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