Backend Engineer — AI Infra & Scalable Systems (London On-site)

Dex, in London, is seeking a backend engineer to own core platform components and scale large-scale batch processing for an enterprise-ready AI operating system. You will work on the LLM gateway, token routing, and multi-tenant security, delivering reliable infrastructure from day one.

You will join a lean team, collaborating closely with peers in person five days a week in London, taking ownership from MVP through scale-up and shaping critical backend foundations for high-scale production

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