Senior Platform Engineer — Python & Platform Leader

MediaLab Group; City of Westminster; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Time to Unwind

Hybrid Working

Career Growth

Health & Wellbeing

Supporting Families

Giving Back

Perks & Rewards

Job summary

Medialab Group in the UK is seeking a senior Platform Engineer to own the non-data foundations of Apollo, Medialab’s marketing intelligence platform. You will shape how we build, ship and operate software across the business.

This is a hands-on, Python-first role, collaborating with the Analytics team and Head of Data & Engineering to balance strategy with practical delivery. You will write production code and set standards, enabling other engineers to excel in a hybrid working environment.

Qualifications

• Significant experience as a senior or lead software/ platform engineer with end-to-end ownership.
• Deep proficiency in Python, including building production APIs, services and applications.
• Experience building user-facing applications, even if frontend is not primary.
• Strong understanding of modern backend architecture, infrastructure and cloud-native systems.
• Experience designing and maintaining CI/CD pipelines, deployment workflows and test strategies.
• Confidence making technical decisions and standing behind them, while remaining collaborative.
• Proven experience leading other engineers through code review, coaching and technical direction.
• Strong problem-solving skills, with a methodical and pragmatic approach to debugging and system design.
• Comfort working in evolving environments where priorities change and ambiguity exists.

Responsibilities

• Accountable for the technical quality, structure and evolution of all non-data components of the Apollo platform.
• Lead design and development of core applications and internal tools, including production UIs built with Python-centric stacks (e.g., FastAPI, Jinja, HTMX, Tailwind).
• Guide implementation decisions across backend services, APIs and application architecture.
• Contribute directly to production code, setting the standard for quality and readability.
• Ensure overall security and secure development practices across platform and AI integration.
• Shape health, reliability and scalability of infrastructure and deployment pipelines.
• Lead CI/CD processes, testing strategy and release workflows.
• Provide day-to-day technical leadership to engineers and review code quality.

Skills

Senior engineer

Python

Backend architecture

CI/CD pipelines

Code reviews

Technical leadership

Problem solving

Cloud-native

Production APIs

Tools

FastAPI

Jinja

HTMX

Tailwind

Job description

Medialab Group in the UK is seeking a senior Platform Engineer to own the non-data foundations of Apollo, Medialab’s marketing intelligence platform. You will shape how we build, ship and operate software across the business.

This is a hands-on, Python-first role, collaborating with the Analytics team and Head of Data & Engineering to balance strategy with practical delivery. You will write production code and set standards, enabling other engineers to excel in a hybrid working environment.