Post-training jobs hiring now at vetted startups and product companies on Alion, updated daily. Average salary around $325,849/year. Compare remote, hybrid and on-site positions with relocation and visa sponsorship. Browse and apply today.
radicalnumerics.ai • HQ: San Francisco, United States • Foundation Models • AI Research Labs • 201-500 employees • Est. 2025 • Startup • Trust A • Hiring 16
HQ: San Francisco, United States • Foundation Models • AI Research Labs • 201-500 employees • Est. 2025 • Startup • Trust A • Hiring 16
Radical Numerics is a research laboratory working on recursive self improvement of machine learning systems, where models help design the next generation of architectures. Its early releases included open diffusion language models trained through automated architecture search rather than hand designed recipes. The company was founded by researchers from leading industrial laboratories and publishes its methods alongside model weights; its research is released with open weights so that others can reproduce the search process.
xpengmotors.com • HQ: Guangzhou, China • Autonomous Driving • Automotive Manufacturing • 5000+ employees • Est. 2014 • Trust B • Hiring 22, 1 new
HQ: Guangzhou, China • Autonomous Driving • Automotive Manufacturing • 5000+ employees • Est. 2014 • Trust B • Hiring 22, 1 new
XPeng is a Chinese smart electric vehicle maker that also develops autonomous driving, intelligent cabin technology and robotics. Its general intelligence center works on foundation models, world models and physical AI, and it hires machine learning engineers and robotics leads in California. The company is headquartered in Guangzhou, China.
chaidiscovery.com • HQ: San Francisco, United States • AI for Science • Foundation Models • Drug Discovery AI • 201-500 employees • Est. 2024 • Startup • Trust C • Hiring 15, 2 new
HQ: San Francisco, United States • AI for Science • Foundation Models • Drug Discovery AI • 201-500 employees • Est. 2024 • Startup • Trust C • Hiring 15, 2 new
Chai Discovery is a San Francisco research company founded in 2024 that builds foundation models for molecular structure and interaction prediction. Its Chai-1 model predicts complexes of proteins, small molecules, nucleic acids and antibodies, and was released for free non-commercial use alongside a commercial offering. The company is backed by OpenAI and Thrive Capital and targets the design of antibodies and other biologics.
qiandao.com • HQ: Shanghai, China • Startup • Trust D • Hiring 61
HQ: Shanghai, China • Startup • Trust D • Hiring 61
Qiandao is a Chinese interest-community and trading app for collectors of designer toys, anime figures, trading cards, idol merchandise, video game cartridges, scale models and murder-mystery games, run by Shanghai Biyou Huixiang Intelligent Technology and based in Shanghai. The platform groups users into hobby communities with millions of members, supports consumer-to-consumer and merchant sales and item databases, and opens its marketplace to merchants and developers. It hires operations interns across categories, IP databases, growth and local services, as well as product managers, Go and cloud-native engineers and AI full-stack and algorithm engineers.
magic.dev • HQ: San Francisco, United States • Code Intelligence • 51-200 employees • Est. 2022 • Startup • Trust B • Hiring 7
HQ: San Francisco, United States • Code Intelligence • 51-200 employees • Est. 2022 • Startup • Trust B • Hiring 7
Magic is a San Francisco research company founded in 2022 that trains frontier models for software engineering. It focuses on extremely long context windows so a model can hold entire codebases and their history in working memory while making changes. The company raised large rounds from investors including Alphabet's CapitalG and Nat Friedman and builds its own training infrastructure.
bot.co • HQ: San Francisco, United States • Robotics AI • Domestic & Household Robotics • Startup • Trust B • Hiring 6
HQ: San Francisco, United States • Robotics AI • Domestic & Household Robotics • Startup • Trust B • Hiring 6
The Bot Company is a robotics start-up that is building a helpful household robot for every home. Its team of engineers, designers and operators comes from companies such as Tesla, Cruise, OpenAI and Google. The company is headquartered in San Francisco, California, United States.
huawei.fi • Helsinki • Tampere • Cloud Platforms (IaaS & PaaS) • Smartphones • Network Equipment • Trust C • Hiring 13
Helsinki • Tampere • Cloud Platforms (IaaS & PaaS) • Smartphones • Network Equipment • Trust C • Hiring 13
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spangle.ai • HQ: Austin, United States • Commerce • Artificial Intelligence • Marketing & Sales AI • Retail & Commerce AI • 51-200 employees • Startup • Trust B • Hiring 8, 1 new
HQ: Austin, United States • Commerce • Artificial Intelligence • Marketing & Sales AI • Retail & Commerce AI • 51-200 employees • Startup • Trust B • Hiring 8, 1 new
Spangle AI is a technology company launched in 2025 that offers an agentic conversion layer connecting AI-led product discovery to real-time conversion for retail brands. It works with enterprise brands in fashion and hires product managers, full stack engineers, customer success and enterprise sales staff. The company is based in the United States.
apolloresearch.ai • HQ: London, United Kingdom • AI Safety & Alignment • 51-200 employees • Est. 2023 • Hiring 12
HQ: London, United Kingdom • AI Safety & Alignment • 51-200 employees • Est. 2023 • Hiring 12
Apollo Research is an artificial intelligence safety organisation focused on deceptive model behaviour. Its evaluations test whether frontier models scheme or hide their intentions. The laboratory publishes interpretability research and advises policymakers on model risk.
skylabs-ai.com • HQ: Coral Gables, United States • AI Agents • Code Intelligence • AI Research Labs • 51-200 employees • Trust D • Hiring 10
HQ: Coral Gables, United States • AI Agents • Code Intelligence • AI Research Labs • 51-200 employees • Trust D • Hiring 10
SkyLabs AI is an artificial intelligence research company applying neurosymbolic AI and intelligent reasoning to complex problems in software engineering. It builds platforms and intelligent agents for the next generation of software development, and its job ads cover backend, agentic AI, fullstack, C++ systems and DevOps engineers, largely based in Islamabad. The company is headquartered in Coral Gables, Florida, United States.
mangodesk.com • HQ: San Francisco, United States • AI Evaluation & Observability • AI Training Data & Annotation • Startup • Hiring 2
HQ: San Francisco, United States • AI Evaluation & Observability • AI Training Data & Annotation • Startup • Hiring 2
MangoDesk is a Y Combinator-backed startup that builds data infrastructure and environments for custom evaluations and post-training data creation for AI models. The team has experience from Scale AI and Uber and recently raised a seed round, and it hires a founding engineer and a strategic projects lead. The company is headquartered in San Francisco, United States.
sandbar.com • HQ: New York, United States • Speech & Audio AI • Smartwatches & Fitness Trackers • 51-200 employees • Est. 2023 • Startup • Trust D • Hiring 13, 1 new
HQ: New York, United States • Speech & Audio AI • Smartwatches & Fitness Trackers • 51-200 employees • Est. 2023 • Startup • Trust D • Hiring 13, 1 new
Sandbar is an interface company in New York City that builds software, machine learning and hardware products to augment individuals. Its first product, Stream, is a private voice ring and conversational interface, and the company hires iOS, infrastructure, ML audio and product design staff. The company is headquartered in New York, United States.
hcompany.ai • HQ: Paris, France • Foundation Models • AI Research Labs • AI Agents • 201-500 employees • Est. 2023 • Startup • Trust A • Hiring 33, 8 new
HQ: Paris, France • Foundation Models • AI Research Labs • AI Agents • 201-500 employees • Est. 2023 • Startup • Trust A • Hiring 33, 8 new
H Company is an artificial intelligence research company headquartered in Paris, France, and founded in 2023 by Charles Kantor with a founding team drawn largely from Google DeepMind. The company develops agentic AI systems, including Runner H, an agent that carries out multi-step tasks in a browser on the user's behalf. It raised one of the largest seed rounds in European history and positions itself as a French alternative in the agent tooling market.
ltx.io • Jerusalem • New York • London • Haifa • Shenzhen • Design & Creative • Media & Entertainment • Multimodal AI • Generative Video • Foundation Models • Likely startup • Trust B • Hiring 8
Jerusalem • New York • London • Haifa • Shenzhen • Design & Creative • Media & Entertainment • Multimodal AI • Generative Video • Foundation Models • Likely startup • Trust B • Hiring 8
LTX builds open-weight diffusion transformer foundation models for multimodal video, audio, and world simulation.
stackblitz.com • HQ: San Francisco, United States • AI Development Tools • Developer Tools • Est. 2017 • Startup • Trust B • Hiring 6
HQ: San Francisco, United States • AI Development Tools • Developer Tools • Est. 2017 • Startup • Trust B • Hiring 6
StackBlitz is a developer tools company that runs full-stack web development environments directly in the browser. Its WebContainers technology executes Node.js inside the browser tab, powering the StackBlitz online IDE and Bolt.new, an AI tool that generates and deploys web applications from natural-language prompts. The company was founded in 2017 and is headquartered in San Francisco, California, United States.
reasonable.io • San Francisco • London • Budapest • AI Governance & Compliance • AI Agents • Hiring 3
San Francisco • London • Budapest • AI Governance & Compliance • AI Agents • Hiring 3
Reasonable is building the verification layer for mission-critical software development, making formal correctness guarantees accessible to every software engineer.
vetto.com • HQ: São Paulo, Brazil • Freelance & Talent Marketplaces • AI Training Data & Annotation • Trust D • Hiring 17
HQ: São Paulo, Brazil • Freelance & Talent Marketplaces • AI Training Data & Annotation • Trust D • Hiring 17
Vetto is a platform that connects domain experts with AI development projects, paying them to review and evaluate model outputs. Its opportunities cover expert reviewers in wellness, travel and sales, physics and nutrition experts for planning AI projects and post-training research scientists for large language models. The company is based in Brazil.
udio.com • HQ: New York, United States • LLM & Generative AI • Generative Audio & Music • 51-200 employees • Est. 2023 • Likely startup • Trust B • Hiring 5
HQ: New York, United States • LLM & Generative AI • Generative Audio & Music • 51-200 employees • Est. 2023 • Likely startup • Trust B • Hiring 5
Udio is a music generation company founded in 2023 by former Google DeepMind researchers. Its models produce full songs with vocals and instrumentation from a text description, and the product includes editing tools for extending and remixing tracks. After litigation with major labels the company moved towards licensed deals with rights holders.
meshy.ai • HQ: San Jose, United States • Content Creation • Game Development • 3D Design • Generative 3D • 51-200 employees • Est. 2021 • Startup • Trust C • Hiring 23
HQ: San Jose, United States • Content Creation • Game Development • 3D Design • Generative 3D • 51-200 employees • Est. 2021 • Startup • Trust C • Hiring 23
Meshy generates three-dimensional models and textures from text prompts or reference images. Founded in 2021 by former Nvidia and Microsoft graphics researchers, it targets game studios and product designers who need assets quickly. The output is exported in standard formats ready for game engines.
