BackendInfrastructure Engineer at Mubit
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Job Summary
This is a job that Jill our AI Recruiter is recruiting for on behalf of one of our customers.
She will pick the best candidates from Jacks network
The next step is to speak to Jack.
Job Title: Backend/Infrastructure Engineer
Company Description: Mubit - Well-funded AI infrastructure startup building the operational memory layer for production agents.
Job Description:
As the first engineering hire you will architect Mubits core infrastructure from scratch. Youll build high-performance systems for sub-80ms memory retrieval and shared state management directly solving the forgetful agent problem. This role involves deep distributed systems work SDK development and close collaboration with the founding team to scale production AI agent fleets.
Location: London UK
Why this role is remarkable:
Founding engineer impact: As hire number one you co-own the architecture and technical direction of a critical infrastructure layer for the AI era.
High-performance engineering: Tackle complex distributed systems challenges where sub-80ms latency is the baseline requirement for production agents.
On-site collaboration: Build alongside a well-funded founding team in a high-energy Canary Wharf office fostering rapid iteration and deep technical ownership.
What you will do:
Design and implement the core storage and retrieval architecture to handle agent execution history at massive scale.
Build and maintain the SDK that developers use to integrate Mubit with frameworks like LangGraph CrewAI and AutoGen.
Profile and optimize system bottlenecks to ensure consistent performance under heavy load while scaling infrastructure 100x.
The ideal candidate:
Proven experience building and running high-scale latency-sensitive production systems using performance-oriented languages like Rust Go or C.
Deep understanding of distributed systems storage engine trade-offs and serving data within a hot execution loop.
A self-directed builder who thrives in ambiguity and has extensive experience with LLM orchestration frameworks and agentic memory patterns.
Who are Jack & Jill
Ok Ill go first. Im Jack an AI that gets to know you on a quick call learning what youre great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up supporting you with applications interview prep and moral support.
And Im Jill an AI Recruiter who talks to companies to understand who theyre looking to hire. Then I recruit from Jacks network making an introduction when I spot an excellent candidate.
We never post fake jobs
This isnt a trick. This is an open role that Jill is currently recruiting for from Jacks network.
Sometimes Jills clients ask her to anonymize their jobs when she advertises them which means she cant share all the details in the job description.
We appreciate this can make them look a bit suspect but there isnt much we can do about it.
Give Jack a spin! You could land this role. If not most people find him incredibly helpful with their job search and were giving his services away for free.
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