Senior AI Systems Engineer — Equity & Benefits

Flow Engineering; Greater London; On-site; GBP 90,000 - 135,000; Full time

Job summary

Flow Engineering is seeking software engineers to build AI-powered capabilities that help teams author, review, and manage requirements more effectively. You will work on agentic systems engineer and agentic domain engineer workflows—bringing AI into the center of how teams reason about their systems.

This role sits at the intersection of AI, product, and full-stack engineering: you will take ideas from prototype all the way to stable, observable features in production.

Qualifications

• 5+ years developing production software, including designing, testing, and operating services at scale in a cloud environment.
• Hands-on experience with modern LLM providers and tooling (e.g., OpenAI, Anthropic, Hugging Face, vector stores, RAG patterns).
• Familiarity with prompt design, retrieval-augmented systems, evaluation methods, and safety/guardrail approaches.
• Ability to reason about tradeoffs between different models, architectures, and deployment patterns and make pragmatic decisions.

Responsibilities

• Design and ship AI-powered features such as assisted requirement drafting, consistency checks, impact analysis, and intelligent suggestions for systems engineers.
• Build agentic workflows that help engineers explore designs, simulate changes, and validate requirements.
• Evaluate and integrate language models and related tooling, optimizing for reliability, latency, cost, and debuggability in production.
• Build and maintain the surrounding infrastructure: data pipelines, evaluation harnesses, prompt and model management, observability, and safety/guardrails.
• Work across the stack—from backend integrations and APIs to simple UI hooks—to deliver complete AI features, not just model endpoints.
• Partner with product and customers to identify high-value workflows, run experiments, and iterate quickly based on usage.

Skills

Production software

LLM tooling

Prompt design

Tradeoff analysis

Ownership mindset

Tools

OpenAI

Anthropic

Hugging Face

Vector stores

RAG patterns

Job description

Flow Engineering is seeking software engineers to build AI-powered capabilities that help teams author, review, and manage requirements more effectively. You will work on agentic systems engineer and agentic domain engineer workflows—bringing AI into the center of how teams reason about their systems.

This role sits at the intersection of AI, product, and full-stack engineering: you will take ideas from prototype all the way to stable, observable features in production.