Founding Python API Engineer for LLMs (Hybrid, Equity)

Hidden Jobs; United States; Hybrid; USD 91,000 - 152,000; Full time

Benefits offered by this job

Equity

Hybrid work model (London & Cambridge)

Job summary

Hidden Jobs is seeking a founding-level software engineer for an AI startup focused on compliance and operational efficiency across regulated industries. The role spans the full software lifecycle, including architecture, backend services, frontend, CI/CD on Azure, and influencing product direction with the founding team.

You will work on cloud-native applications using Python and TypeScript, collaborating on technical strategy, and helping shape the engineering culture as the company grows.

Qualifications

• Strong Python expertise and experience building from scratch.
• Background in startup environments and scalable software design.
• Experience designing and consuming RESTful APIs, preferably FastAPI.
• Proficiency with TypeScript, React, HTML5 and CSS3.
• Hands-on with large language models and agentic AI approaches.
• Entrepreneurial mindset with proactive problem solving.
• Strong collaboration and communication skills.
• Degree in computer science or related field with 2.1 or higher, postgraduate study common.

Responsibilities

• Take ownership of the design and delivery of scalable, cloud-native applications.
• Work across the full software lifecycle, from architecture and backend services through to frontend, CI/CD and Azure deployment.
• Build primarily with Python and TypeScript, leveraging AI and large language model technologies.
• Collaborate with the founding team on technical direction, product decisions and engineering culture.
• Tackle complex engineering problems and establish practices that will scale with the company.
• Contribute directly to architectural choices and overall engineering standards.

Skills

Python

REST APIs

FastAPI

TypeScript

React

HTML5

CSS3

Large language models

Agentic AI

Entrepreneurial mindset

Collaboration

Education

CS degree 2:1 or higher

Job description

Hidden Jobs is seeking a founding-level software engineer for an AI startup focused on compliance and operational efficiency across regulated industries. The role spans the full software lifecycle, including architecture, backend services, frontend, CI/CD on Azure, and influencing product direction with the founding team.

You will work on cloud-native applications using Python and TypeScript, collaborating on technical strategy, and helping shape the engineering culture as the company grows.