Jobs
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Senior Software Engineer - London
Full TimeEngineering
About H: When we released Holo4 on 28 September, we published every trajectory behind its public benchmark scores at trajectories.hcompany.ai . For OSWorld that's 369 desktop tasks, each run 3 times, with the steps, tokens and time of every attempt. This role builds and runs the evaluation…
Listing from Arbeitnow · posted 13 October 2026
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Product Designer - London
Full TimeProduct
As a Product Designer, you'll work on the H Platform, where our users create and run agentic AI workflows powered by our models. Nobody has written the playbook for designing these experiences yet. Our next stage is making the platform truly useful for its users and levelling it up, in design as…
Listing from Arbeitnow · posted 13 October 2026
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Infrastructure Engineer (ML Compute) - London
Full TimeEngineering
You’ll own the GPU compute that powers our model training, evaluation and serving systems. This role sits in our Infrastructure team, which works at the lowest layers of our stack, from Kubernetes down to the GPU hardware. You’ll run the clusters, GPUs and schedulers that our research, product and…
Listing from Arbeitnow · posted 13 October 2026
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Technical Lead, Observability - London
Full TimeEngineering
You'll own observability across H: the strategy, technical design and rollout. Your work will give visibility of the entire stack and surface the information the company relies on to make key decisions and quantify progress. H builds computer-use agents that take actions in browsers and desktop…
Listing from Arbeitnow · posted 13 October 2026
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Senior Full Stack Engineer
Full TimeEngineering
You'll build the interfaces people use to run H's agents: the H Platform , where teams deploy an agent, follow it live and replay what it did step by step, and HoloTab , our Chrome extension that controls the browser on its user's behalf. The work is mostly front end, in React and TypeScript, with…
Listing from Arbeitnow · posted 13 October 2026
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Infrastructure Engineer (Platform) - London
Full TimeEngineering
You'll be joining the team responsible for the infrastructure behind all of H's products: clusters, networking and security. It's the foundation that lets the rest of the company deliver value directly to customers. What you'll own From your first quarter, you'll own a real piece of our move from…
Listing from Arbeitnow · posted 13 October 2026
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