Backend Platform Architect for AI Systems (Python) + Equity

SR2 | Socially Responsible Recruitment | Certified B Corporation™; Greater London; On-site; GBP 120,000 - 180,000; Full time

Job summary

SR2 | Socially Responsible Recruitment | Certified B Corporation™ is seeking a Senior Backend Engineer in London to design and build robust backend systems using Python. You will work with a high-calibre startup developing an agentic AI product, focusing on infrastructure and tooling. Responsibilities include developing backend services, integrating external data sources, and improving system reliability. Ideal candidates have strong Python experience and a solid understanding of distributed systems. This role offers a salary range of £120,000 – £180,000 plus equity.

Qualifications

• Strong backend engineering experience, ideally in Python.
• Experience building platform or infrastructure systems.
• Solid understanding of system design and distributed systems.

Responsibilities

• Developing backend services using Python.
• Designing systems that handle real-world edge cases and failures.
• Building infrastructure that supports AI-driven workflows.
• Integrating external services into a reliable platform.

Skills

Backend engineering experience

Python

System design

Distributed systems

Scalable architecture

Tools

FastAPI

Django

Job description

SR2 | Socially Responsible Recruitment | Certified B Corporation™ is seeking a Senior Backend Engineer in London to design and build robust backend systems using Python. You will work with a high-calibre startup developing an agentic AI product, focusing on infrastructure and tooling. Responsibilities include developing backend services, integrating external data sources, and improving system reliability. Ideal candidates have strong Python experience and a solid understanding of distributed systems. This role offers a salary range of £120,000 – £180,000 plus equity.