Note: The job is a remote job and is open to candidates in USA. Harnham is recruiting for an AI-focused technology company that helps enterprises understand, model, and optimise how work gets done through business modelling and generative AI. The Principal Applied AI Engineer will own the architecture and production delivery of an LLM platform, remain hands-on in coding and technical decision-making, lead a small multidisciplinary team, and translate stakeholder requirements into scalable solutions.
Responsibilities
- Architect and evolve a production LLM platform: orchestration, retrieval, multi-provider model routing, and evaluation
- Stay in the codebase. Design, build, and review code alongside the team, not just direct it
- Own evaluation for the system: define what "good" looks like, catch regressions before they reach users, and keep the platform reliable as it scales
- Own the GCP infrastructure the platform runs on: deployment pipelines, BigQuery, Cloud Run, IAM
- Lead a small multidisciplinary team of software engineers, data engineers, and data scientists day to day, through code review and technical guidance
- Translate requirements from technical and non-technical stakeholders into shipped, scalable solutions
Skills
- Production experience building and shipping LLM applications: LangChain, LangGraph, or equivalent orchestration frameworks
- Working knowledge of multiple model providers (OpenAI, Anthropic, Google Gemini) and the trade-offs between them
- Real evaluation experience: you've had to define what "good" means for a system with no existing benchmark, not just run a test suite someone else built
- Strong Python and production software engineering fundamentals: distributed systems, testing, CI/CD
- Hands-on GCP experience: Cloud Run, BigQuery, IAM, deployment pipelines
- A track record of technical leadership through code review and mentorship, while remaining hands-on
- Comfortable in a fast-moving, high-ownership environment
- A plus, not a requirement: exposure to analytics, financial services, consulting, or business transformation
Benefits
- Meaningful early-stage equity
- Health, dental, and vision
- Retirement plan
- Generous holiday allowance
- Remote or hybrid, East Coast
- Real influence over architecture, product direction, and engineering culture at an early stage
Company Overview
Company H1B Sponsorship