Full Stack Engineer (Founding)

SEEKR; London; Hybrid; GBP 65,000 - 85,000; Full time

Job summary

A tech-driven company in London is looking for a Full-Stack Engineer to help build a new platform focused on AI agent costs and margins. You will have full technical ownership of the architecture while collaborating with experienced founders. Ideal candidates should have 3+ years of experience in backend systems, be fluent in Python or TypeScript, and have a strong understanding of cloud infrastructure. This is a full-time role with a hybrid work model, based in the London HQ.

Qualifications

• 3+ years building distributed, high-throughput backend and full stack systems.
• Fluent in Python, TypeScript or Go; advanced API development skills.
• Strong knowledge of security and cloud infrastructure; frontend experience major plus.

Responsibilities

• Architect, own, and deliver real-time data streaming, analytics, and APIs.
• Build high-throughput, low-latency event pipelines using streaming frameworks.
• Ensure end-to-end reliability, observability, and cloud scalability.

Skills

Python

TypeScript

Go

API development (REST/GraphQL)

React

Tools

AWS

GCP

Docker

Kubernetes

Postgres

ClickHouse

Job description

Overview

Are you a Full-Stack Engineer who thrives on building things from scratch and wants to shape a new platform for agentic AI economics? Want to be engineer #3?

About the Mission

Build the go-to intelligence platform for tracking AI agent costs, margins, and predicting future burn. You\'ll architect, own, and deliver real-time data streaming, analytics, and powerful APIs for dashboards and integration — turning millions of metrics into actionable insights for the world\'s fastest-moving AI companies.

What You’ll Build

• High-throughput, low-latency event pipelines using modern streaming frameworks.


• Scalable databases and attribution engines (Postgres, ClickHouse) for cost/revenue mapping.


• APIs and dashboard integrations in TypeScript and Python.


• Machine learning infrastructure for prediction and anomaly detection.


• End-to-end reliability, observability, and cloud scalability (AWS, GCP, Docker, Kubernetes).

The Opportunity

• Full technical ownership — drive architecture, standards, and build at company-defining scale.


• Work in a collaborative London HQ office (4 days/week) with two experienced founders and front-end leaning full-stack hire #1.

Your Background

• 3+ years building distributed, high-throughput backend and full stack systems.


• Fluent in Python, TypeScript or Go; advanced API development (REST/GraphQL).


• Strong knowledge of security and cloud infra; frontend experience (React) major plus.


• Startup energy: curious, proactive, communicative.

How to Apply

[e-mail] with the subject “Found(er) Me.” Share why you\'re the builder for this, and show off the last thing you shipped at scale.

Seniority level

• Mid-Senior level

Employment type

• Full-time

Job function

• Engineering and Information Technology

Industries

• Staffing and Recruiting

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