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SpaceXAI

Backend Engineer - API

SpaceXAI · London, England, United Kingdom

Posted about 3 months ago

or apply directly on SpaceXAI's site. We never take the application ourselves.

Is this posting real?

This role has been open
87 days
SpaceXAI's roles stay open a median of 87 days
Reposted
No
Salary listed
No
32% of SpaceXAI's roles list one
Ghost-job risk at SpaceXAI
high
258 stale, 5 reposted of 258 open
Hiring momentum
339 roles opened in the last 90 days
↑ up vs. the prior 90 days
Last confirmed on the employer's board
2026-10-29

Measured from postings appearing on and disappearing from SpaceXAI's own greenhouse board since 2026-08-03. Full hiring picture for SpaceXAI.

About this role

The Backend Engineer - API role at SpaceX involves building and maintaining the SpaceXSI API that serves models to developers globally. The engineer will be responsible for the entire system that ensures high-throughput inference, focusing on low latency and high availability, and will work with technologies such as Rust and various databases.

Our read on this posting2.6out of 5
benefits
4/5
freshness
1/5
career value
4/5
role clarity
4/5
pay transparency
0/5

Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of SpaceXAI as an employer.

What you need

  • Expert knowledge of either Rust or C++
  • Experience in designing, implementing, and maintaining reliable and horizontally scalable distributed systems
  • Knowledge of service observability and reliability best practices
  • Experience in operating commonly used databases such as PostgreSQL, Clickhouse, and MongoDB

Nice to have

  • Experience with LLM inference engines and serving frameworks (e.g., SGLang, TensorRT, vLLM)
  • Experience designing or building with agent SDKs and agent orchestration frameworks
  • Experience with Docker, Kubernetes, and containerized applications
  • Expert knowledge of gRPC (unary, response streaming, bi-directional streaming, REST mapping)

What you get

  • £107,000 - £262,000 GBP
  • Equity
  • Comprehensive healthcare and dental coverage
  • Cash plan
  • Income protection
  • Life insurance

Worth weighing

  • Most backend infrastructure is written in Rust, which may require a steep learning curve for those unfamiliar with it.
  • The role involves handling billions of tokens per minute, which could imply high pressure and demanding performance expectations.

Summarised from SpaceXAI's posting. Read the full original.

Listed by SpaceXAI on their greenhouse job board, last confirmed open on 2026-10-29. PitchMeAI is not the employer.

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