Principal AI Platform Lead: GTM & Applied AI (Equity)

MMC; United Kingdom; Hybrid; GBP 120,000 - 180,000; Full time

Benefits offered by this job

Equity stake

Competitive salary

Flexible working

Generous PTO

Private medical insurance

Company pension

MacBook and home office equipment

Family leave

Job summary

Snowplow is seeking a Principal Engineer to lead the expansion of Firn for GTM and AI-driven engagement. You will design and unify GTM services, build agents and tooling on top of Firn, and push for a production‑grade platform with robust governance and tracing.

You will report to the Senior Director of Applied AI and work with Marketing, Sales, and Partnerships as customers, owning the platform roadmap and long‑term strategy.

Qualifications

• Years of production software behind you. You have designed, shipped and run systems other teams depend on, in Python or TypeScript, with SQL, CI/CD and cloud infrastructure as everyday tools.
• Built LLM systems that real work runs on. Agents with tools, MCP servers, gateways, tracing and evaluation.
• Platform instincts. You have built systems other people depend on, through interfaces you designed.
• Data platform fluency. Snowflake or an equivalent warehouse, dbt, data contracts, and the pipelines that move warehouse data into SaaS tools.
• Operational discipline. Alerting, recovery, runbooks and cost tracking are things you add before anyone asks.
• Judgment about where an agent belongs. You can tell which decisions should be deterministic code, which an agent can make, and which should stay with a person.
• An AI-native way of working you can show us. A workflow, agent or tool you built and still use.
• Comfort with internal customers who are not engineers. You can sit with a growth director, a seller or a marketer, take a requirement, and hold the line on how it gets built.
• Technical direction without a title. You have set direction for a platform that other engineers followed because the design was right.

Responsibilities

• Lead GTM intelligence engine on Firn, designing the data and AI that decide who we engage and with what.
• Own agents and tools built on the factory framework with review steps and evaluations.
• Define platform architecture including MCP gateway, LLM gateway, tracing and ledger.
• Ensure production-grade standards: version control, CI, alerting, recovery, and cost visibility.
• Maintain learning loops and metrics definitions with data engineers.
• Oversee eval and tracing infrastructure and empower engineers with tooling.
• Set the engineering bar for Applied AI and own the platform roadmap.
• Collaborate with Marketing, Sales, and Partnerships as internal customers.

Skills

Python

TypeScript

SQL

CI/CD

Cloud infrastructure

Tools

LLM gateways

MCP gateway

Job description

Snowplow is seeking a Principal Engineer to lead the expansion of Firn for GTM and AI-driven engagement. You will design and unify GTM services, build agents and tooling on top of Firn, and push for a production‑grade platform with robust governance and tracing.

You will report to the Senior Director of Applied AI and work with Marketing, Sales, and Partnerships as customers, owning the platform roadmap and long‑term strategy.