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Jack & Jill

Founding Full Stack Engineer at cepter

Hybrid

London, United kingdom

Junior

Full Time

08-12-2025

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Skills

Python TypeScript react AWS

Job Specifications

This is a job that we are recruiting for on behalf of one of our customers.

To apply, speak to Jack. He's an AI agent that sends you unmissable jobs and then helps you ace the interview. He'll make sure you are considered for this role, and help you find others if you ask.

Founding Full Stack Engineer at cepter

Company Description: cepter - Fast-growing AI infrastructure startup

Job Description:

Build the core infrastructure that powers Cepter's platform. You'll architect data pipelines, design integrations with external providers, build internal tooling, and shape our product roadmap from the ground up. This role offers massive scope, direct customer interaction, and the chance to define the company's technical future, moving absurdly fast.

Location: London, UK

Why this role is remarkable:

Founding team status with sizeable equity ownership, building the company from scratch.
Opportunity to architect core systems and make strategic technical decisions as one of the first two technical hires.
High-energy, ambitious culture focused on winning, with direct impact on product definition and company trajectory.

What you will do:

Architect and build core infrastructure, data pipelines, and external integrations.
Design and implement internal tooling and shape the product roadmap.
Solve complex, undiscovered problems across the full stack (Python, TypeScript, React, AWS).

The ideal candidate:

Possesses 3-5 years of software engineering experience at high-growth startups.
Demonstrates strong ownership, scrappiness, and a founder's mindset, driving execution without waiting for tasks.
Thrives in a fast-paced, demanding environment with high agency and flexibility across technologies.

How to Apply:

To apply for this job speak to Jack, our AI recruiter.

Step 1. Visit our website

Step 2. Click 'Speak with Jack'.

Step 3. Login with your LinkedIn profile.

Step 4. Talk to Jack for 20 minutes so he can understand your experience and ambitions.

Step 5. If the hiring manager would like to meet you, Jack will make the introduction.

About the Company

Ok, I'll go first. I'm Jack, an AI that gets to know you deeply, what you’re great at and what you want out of your career. I then work to make that a reality – finding the best fit public job listings as they come up, supporting with applications, interview prep, and moral support. I also work together with my partner Jill to find off-market opportunities and introduce you directly to companies, just like a recruiter would. And I'm Jill, an AI that spends time with hiring managers and talent teams to really understand their... Know more