Sequence

AI Engineer - London

Sequence
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3 months ago
London, United KingdomSenior
H1B Sponsor

Responsibilities

  • Build and own AI infrastructure for reliable software on top of non-deterministic models, including agentic workflows, prompt iteration, tools, and evaluations.
  • Develop flexible, deterministic, and auditable approval workflows configured through natural language.
  • Build an intelligent collections agent that autonomously executes configurable payment-reminder and escalation workflows.
  • Shape fundamental architecture and engineering practices as the team grows.
  • Work directly with customers and cross-functional product and design teams.
  • Take production responsibility for revenue-critical infrastructure, including on-call responsibilities.

Requirements

  • Experience shipping LLM-based systems to real customers and understanding how they fail in production.
  • Experience designing agentic systems, including embeddings, memory, tool use, long-running state, and recovery from partial failures.
  • Experience building evaluation infrastructure involving datasets, LLM-as-judge systems, prompt regression tests, and monitoring.
  • Experience writing resilient software for business-critical systems built on non-deterministic models.
  • Informed opinions about tooling for building, evaluating, and securely operating multi-provider AI systems in production.
  • Experience shipping production backend systems and understanding reliability requirements.
  • Strong customer orientation, comfort with ambiguity, adaptability, and clear communication.
  • Ability to take end-to-end ownership in a small, fast-moving engineering team.

Benefits

  • Hybrid work in London with three days per week in the office and team lunch on Wednesdays.
  • 25 days of holiday plus bank holidays.
  • Modern flexible pension through Penfold with salary sacrifice available.
  • Meaningful share options.
  • Visa sponsorship available.
  • Typically two-week interview process from start to finish.

Tech Stack

Google BigQueryGoogle CloudKotlinPostgreSQLReactSpring BootTerraformTypeScript
Sequence

About Sequence

51-200 employees

Sequence is the modern billing and quote to cash platform to unlock error-free revenue workflows at scale. Backed by a16z 645 ventures and Salesforce Ventures, Sequence is working with leading B2B scaleups including Cognition, Incident.io, Bridge (acq. by Stripe) OpenRouter and Legora.