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Prism Digital

Back End Developer

Hybrid

London, United kingdom

£ 400 /day

Freelance

29-01-2026

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Skills

Python Jira MongoDB PostgreSQL Docker Architecture Databases Autonomy react node.js AWS FastAPI Langchain

Job Specifications

Python Developer | Python & FastAPI | Founding Engineer in High-Growth AI Venture Studio

Contract | £400/day | Outside IR35

The Role

You’ll step in as a Founding Engineer within an early-stage AI venture studio that builds and launches creator-led B2C software businesses at speed.

This is a backend-leaning role (circa 80% backend) where you will own core systems end to end, shaping APIs, designing data models, and shipping production code used by real users from day one. You won’t be handed Jira tickets and told what to build. Instead, you’ll work directly with the CTO, making architectural decisions.

This is a contract role for someone who thrives in ambiguity, enjoys high ownership, and wants to make a visible impact quickly, without the drag of corporate process.

What They’re Looking For (Non-Negotiables)

Ideally, you’ve worked in B2C businesses or VC-backed startups where products scaled rapidly and engineering had to keep up.

You naturally take responsibility, communicate clearly, and act with intent, with more founder mentality than feature factory. You’re comfortable building things that don’t yet have perfect answers.

What You’ll Work With

Python development at a high level
FastAPI or adjacent Python backend frameworks
API design and backend architecture fundamentals
PostgreSQL and/or MongoDB
React or React Native for frontend collaboration
AWS serverless infrastructure
Docker for bespoke services

Nice to Haves

B2C mobile or consumer product experience
Experience in VC-backed or hyper-growth environments
Node.js development alongside Python
Vector databases such as Chroma and embedding pipelines
LangChain, CrewAI, or similar AI orchestration frameworks
Practical security and data privacy awareness
Linear or similar planning tools
Experience with image modelling AI systems
AI-assisted development using tools such as Claude Code

Why Join / Projects

This venture studio partners directly with large creators (often with 1M+ followers) as co-founders, meaning every product launches with built-in distribution, immediate users, and fast feedback loops.

Under the hood, you’ll be building on an internal AI-first factory made up of reusable components, agent-driven workflows, and a growing knowledge graph that improves with every product shipped. The goal is simple: launch high-quality ventures dramatically faster than traditional startups.

You’ll gain exposure, ownership, and shipping velocity that would usually take years to accumulate, all compressed into a contract where your work directly shapes real products in the wild.

Employee Benefits

£400 per day contract rate
Outside IR35
Upskilling allowance
Access to best-in-class AI development tools
High-autonomy, low-ego engineering environment
London-based, with flexibility for the right contractor

Python Developer | Python & FastAPI | Founding Engineer in High-Growth AI Venture Studio

Contract | £400/day | Outside IR35

About the Company

We are Prism Digital, your DevOps and Cloud talent partner. Proud sponsors and co-organisers of the London DevOps meetup group. We are a niche consultancy with a tight focus on driving quality over quantity. We pride ourselves on our consultative approach, our extensive knowledge of the DevOps, Cloud and infrastructure sector and most importantly how important great talent is to help your company grow and succeed. We offer: • Expertise in Cloud (AWS, Azure, GCP), Linux, Windows, CI/CD, Configuration Management, IaC, Cont... Know more