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Zeit AI

Staff Backend Engineer, Platform

Posted One Month Ago
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In-Office
London, Greater London, England, GBR
Expert/Leader
In-Office
London, Greater London, England, GBR
Expert/Leader
Own and scale a multi-tenant backend platform supporting unpredictable agent-driven workloads. Responsibilities include optimizing Postgres query performance, I/O, replication and sharding; managing Docker-based agent sandboxes; building customer network connectivity with proxies and routing; and defining platform architecture while writing production TypeScript code.
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Opportunity

  • ZeitMind is an autonomous data engineer for mid-market businesses. Agents and people work the same company data: ingest, pipeline, clean, analyse, build operational apps

  • we are growing fast and will be onboarding multiple enterprise customers a week. The backend isn't ready yet, your impact will decide the speed at which we can grow

  • load growth is compounding: more customers, multiple users per customer, many agent interactions per user and multiple agent artifacts (data pipelines, schedules, analyses) coming out of the interactions

  • you own the platform

What you'll do

  • scale a multi-tenant Postgres under unpredictable load: query and I/O optimisation, read/write separation, horizontal scaling

  • make agent-driven workloads survivable: one user can spin up 30 table syncs, some running hours, while others query large sources

  • manage the sandbox layer: Docker containers where agents run queries and reverse-engineer files, with compute and memory budgets

  • own connectivity into customer networks: SOCKS5 over WebSockets, authentication, routing

  • scope the architecture and build it

What we're looking for

  • staff or principal level, still hands-on, writing production code

  • built and scaled multi-tenant data platforms in a B2B startup or platform company before

  • deep Postgres or database knowledge: query plans, locking, I/O, caching, replication, sharding

  • understands startup pace and ownership without specs

  • pragmatic over ideal, wants to build foundations right without overengineering

  • strong TypeScript

  • English C1, German a plus

Nice to have

  • experience at a data platform or warehouse company (Snowflake, Databricks, Cloudflare or similar)

  • networking depth: proxies, VPN, routing

Location

  • preferred: Munich, on-site. We support relocation within Europe

  • already in London? We can make that work. We have people here and are opening a small office, and we'd expect regular Munich travel. In-person culture is important to us

Tech stack

  • TypeScript end to end. Bun, tRPC, Postgres, Supabase. React frontend (Mantine, TanStack Query). Docker, job/process management, VPN/routing, agentic frameworks

 

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