CAREERSBuild systems agents survive in.
We are a small Sofia studio shipping agentic AI for production — evals, traces, durable execution, and the orchestration that keeps swarms honest past day 30.
Open roles are listed below. We hire senior engineers who like ownership, clear contracts, and boring reliability next to interesting models.
Remote-friendly within EU time zones; Sofia office available. We reply to every serious application.
ROLESOpen positions
APPLIED AI · FULL-TIME · SOFIA / EU REMOTE
Applied AI Engineer — Evals & RAG
Own retrieval quality and evaluation loops so agent answers stay grounded — golden sets, regression gates in CI, and honest failure modes.
- RAG pipelines and retrieval eval harnesses
- Prompt / tool regression suites in CI
- Partnering with product eng on production guardrails
Role id: applied-ai-evals-rag
PLATFORM · FULL-TIME · SOFIA / EU REMOTE
Senior Software Engineer — Agent Orchestration
Design and ship the coordination layer for multi-agent systems: typed messaging, durable workflows, backpressure, and rollback paths ops teams trust.
- Durable execution and workflow engines
- A2A / tool protocols and schema-driven contracts
- Observability: traces, evals hooks, on-call handoffs
Role id: senior-agent-orchestration
PRODUCT · FULL-TIME · SOFIA / EU REMOTE
Staff Full-Stack Engineer — Agent Ops Surfaces
Build the consoles and operator UX where humans gate irreversible effects — clear status, audit trails, and calm incident UX.
- Next.js / TypeScript product surfaces
- Realtime status, audit, and approval flows
- Design-system craft without dashboard clutter
Role id: staff-full-stack-agent-ops
APPLYHow to apply
Send a short note on a system you shipped (or kept alive), a link to work you are proud of, and the role id from the list above.
Email careers@tzar.tech →