Founding Software Engineer Python – Start-up

Company: Client Server
Apply for the Founding Software Engineer Python – Start-up
Location: London
Job Description:

Overview

In this Founding Software Engineer role you will shape both technology and product in a fast-growing AI startup. You’ll own the design and development of cloud-native applications, spanning backend, frontend, and deployment on Azure, working closely with the founding team. You’ll influence technical direction and establish engineering practices for scalable growth. The position offers hands-on autonomy and a strong impact on product decisions and engineering culture. This is an exciting chance to help solve real-world compliance and operational challenges with AI-enabled solutions.

Pay / Benefits

  • salary up to 115k
  • equity
  • hybrid/remote working
  • expenses covered for in-person days
  • career growth opportunities

Responsibilities

  • Design and develop scalable, cloud-native applications across the full software development lifecycle
  • Lead architecture and backend services, plus frontend development, CI/CD, and deployment on Azure
  • Collaborate with the founding team to steer technical direction and engineering practices
  • Work primarily with Python and TypeScript, leveraging AI technologies to build products
  • Own coding and implementation with hands-on input on product decisions and architecture

Key requirements

  • Strong technical skills with Python
  • Experience with RESTful APIs (FastAPI preferred)
  • Knowledge of TypeScript, React, HTML5, CSS3 (beneficial)
  • Experience with LLMs and agentic AI, proactive and entrepreneurial spirit
  • Curious, fast learner, comfortable in a startup/unstructured environment
  • Collaborative with good communication skills
  • Degree educated, minimum 2.1 at BSc from a top-tier university; Computer Science or related field preferred (MSc/PhD advantageous)
  • collaborative
  • proactive
  • strong communication
  • Python
  • TypeScript
  • FastAPI

Posted: September 14th, 2026