Member of Technical Staff – Backend/Platform Engineer
Department: Infrastructure team
Location: San Francisco / Tel Aviv / Zurich
Employment Type: FullTime
Tzafon is a foundation model lab building scalable compute systems and advancing machine intelligence, with offices in San Francisco, Zurich & Tel Aviv. We’ve raised over $12m in funding to advance our mission of expanding the frontiers of machine intelligence.
We're a team of engineers and scientists with deep backgrounds in ML infrastructure & research. Founded by IOI and IMO medalists, PhDs, and alumni from leading tech companies, we train models and build infrastructure for swarms of agents to automate work across real-world environments.
You will:
Design, version, and operate core APIs across our systems
Orchestrate processes with isolation, quotas, and guardrails.
Implement approvals and audit/replay.
Stand up observability: OpenTelemetry spans, logs, metrics, replayable traces.
Drive reliability (SLOs, autoscaling, backpressure, retries).
You have:
Interest in building scalable systems
Built and operated real‑time APIs (streams, websockets, or game/RTC‑style).
Strong data modeling for event logs/traces; comfort with queues & idempotency.
Experience with sandboxed automation or similar.
Worked with Go and are comfortable with advanced concurrency patterns
Security mindset
Nice to haves:
Temporal/NATS/Kafka experience; ClickHouse/OLAP for traces; Kubernetes, Nomad.
Billing exposure; SOC2 experience.
Stack: Go, Rust, gRPC, Postgres, Redis, S3, a queue (SQS/Pub/Sub/NATS), Prometheus, Tzafon Waypoint
Life at Tzafon
Full medical, dental, and vision coverage, plus 401(k) in the US
Office in SF, Zurich and Tel Aviv
Early-stage equity in a future-defining company
Visa sponsorship: We do sponsor visas! However, we aren't able to successfully sponsor visas for every role and every candidate. If we make you an offer, we will make every reasonable effort to get you a visa.
Compensation
Compensation starts at $150k-$250k and equity package.
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