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Jack & Jill

Full Stack Engineer

Hybrid

London, United kingdom

Mid level

Full Time

16-02-2026

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Skills

Leadership Python Go TypeScript CI/CD node.js AWS CI/CD Pipelines Terraform Microservices

Job Specifications

This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.

She will pick the best candidates from Jack's network.

The next step is to speak to Jack.

Lead Fullstack Engineer

Salary: £70,000-£100,000 + Equity

Company Description: VC-backed cybersecurity SaaS

Job Description:

As a foundational engineering hire, you will build and scale a modern risk intelligence platform. Working closely with the Director of Engineering, you will design robust backend services and manage AWS infrastructure to process high-volume intelligence feeds. You will play a pivotal role in shaping engineering practices and mentoring the team during our transition from Seed to Series A.

Location: London, UK

Why this role is remarkable:

Significant foundational impact where your architectural decisions and code directly shape the platform's future.
Opportunity to join a well-funded startup backed by top-tier investors during a high-growth phase toward Series A.
Work in the critical cybersecurity domain using cutting-edge tech like LLM-powered pipelines and event-driven microservices.

What you will do:

Design and build performant TypeScript/Node.js and Python services that ingest and serve real-time intelligence at scale.
Own and evolve AWS infrastructure using Terraform, ensuring secure, cost-effective, and production-ready deployments via CI/CD pipelines.
Help define engineering practices, mentor new hires, and contribute to high-level architectural strategy as the team grows.

The ideal candidate:

5+ years of backend development experience with deep expertise in Node.js, TypeScript, and Python in a startup environment.
Hands-on experience building and operating production AWS infrastructure including ECS, Lambda, and RDS using Infrastructure-as-Code.
Strong communicator who enjoys technical leadership and has a track record of building scalable systems and data pipelines.

Who are Jack & Jill?

Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.

And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.

Next steps

Step 1. Visit our website.

Step 2. Click 'Talk to Jack'.

Step 3. Talk to Jack so he can understand your experience and ambitions.

Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.

Step 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction.

Step 6. If not, Jack will find you excellent alternatives. All for free.

We never post fake jobs

This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.

Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.

We appreciate this can make them look a bit suspect, but there isn't much we can do about it.

Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.

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