Python Developer

SEEKR; England; On-site; GBP 80,000 - 120,000; Full time

Benefits offered by this job

Private health care

Pension

Strong equity offering

Job summary

A startup focused on AI infrastructure in London is seeking a Founding Python Back-End Engineer. In this role, you will build core infrastructure for processing real-time data streams and develop APIs for analytics. Ideal candidates will have 3+ years of experience in backend systems, strong Python skills, and a passion for reliability. The position offers a competitive salary, equity options, and a collaborative work environment.

Qualifications

• Minimum 3+ years building and scaling distributed backend systems.
• Obsession with reliability, scalability, security, and observability.

Responsibilities

• Build Python-powered core infrastructure for data streams.
• Develop reliable APIs and streaming pipelines.
• Collaborate with founding engineers on product standards.

Skills

Python engineering excellence

Real-time event-driven architecture

Modern SQL/NoSQL databases

REST/GraphQL APIs

Cloud infrastructure (AWS, GCP, Docker, Kubernetes)

Machine learning infrastructure

Job description

Founding Python Back-End Engineer – £80,000 to £120,000+ (On site - London Bridge)

Most engineers build predictable products and systems. The ambitious ones build those that few people have yet thought about.

This is an opportunity to join a tight-knit founding team in stealth mode, obsessed with transforming AI economics — working together in person, at a rapid pace, and with vision.

The product is already in use by select customers with demands few can meet, and the only thing holding back 10x growth is the need for more driven hands on deck.

The mission: deliver multimodal AI agent infrastructure that ingests, processes, and analyses millions of real-time events, surfacing actionable insight for the most ambitious businesses.

Why You?

You bring deep Python engineering excellence and an appetite for building systems from the ground up. This is your chance to architect the backend for a real-time analytics platform, translating high-velocity streams of data into clear, actionable intelligence for operators and engineers.

If you thrive on tackling ambiguous problems and owning outcomes in a fast-moving environment, you belong here.

What Will You Build?

Python-powered core infrastructure for ingesting, processing and analysing massive real-time data streams; think millions of cost and revenue events daily.

Reliable APIs and streaming pipelines that support complex analytics and live dashboards for insight and transparency.

Machine learning backbone for anomaly detection, predictive margin analysis, and scalable attribution graphs.

Close collaboration with founding engineers—defining product standards and influencing company direction from the ground up.

Who’s the Ideal Fit?

• Knack for figuring out hard problems, moving quickly, and handling the creative chaos of early-stage product development.
• Minimum 3+ years building and scaling distributed, data-heavy backend systems in production environments.
• Advanced Python and experience with real-time event-driven architecture, modern SQL/NoSQL databases, REST/GraphQL APIs, and cloud infrastructure (AWS, GCP, Docker, Kubernetes).
• Obsession with reliability, scalability, security, and observability in backend systems.
• Bonus: Experience with machine learning infrastructure or agentic AI.

Why Join?

• You get to say you were there in the early days.
• Work on technology that shapes how top-tier companies make product and business decisions in real time.
• Very healthy salary for an early-stage business and a strong equity offering.
• Private health care, pension, and runway for long-term growth.

NOTE: London-based, in-person team (London Bridge)—working together, learning fast, iterating constantly (4 days/week in office).

Send your CV to [e-mail] with the subject "I work best in 3D" and include Python project examples that showcase what you can do at the frontier.

Seniority level

Mid-Senior level

Employment type

Full-time

Job function

Engineering and Information Technology

Industries

Staffing and Recruiting

Referrals increase your chances of interviewing at SEEKR by 2x