At a Glance
- Tasks: Build AI-powered decision infrastructure and design end-to-end features.
- Company: Exciting post-seed startup with a high-profile founding team.
- Benefits: Competitive salary, dynamic work environment, and impactful projects.
- Other info: Join a fast-paced team in London, working 4 days a week.
- Why this job: Shape the future of decision-making with innovative technology.
- Qualifications: Experience in React, Python, and cloud infrastructure; adaptable mindset.
The predicted salary is between 60000 - 80000 € per year.
£10M+ post‑seed decision infrastructure startup led by former 10 Downing Street and Mass Testing advisors.
You will build critical decision infrastructure that uses AI‑powered synthetic audiences to simulate human behavior. Working directly with hands‑on founders, you'll evolve a platform that replaces guesswork with evidence‑based modeling. This role requires an execution‑focused engineer who can navigate ambiguity and bridge the gap between complex AI orchestration and intuitive product design.
Location: London, UK
Why this role is remarkable:
- Work with a high‑pedigree founding team including the former Chief Advisor to the PM on Digital and Data and the former Director of Mass Testing.
- Join a post‑seed startup with over £10M in funding that is solving the massive problem of how organizations model human response to uncertainty.
- High‑impact opportunity where your architectural decisions on APIs and system boundaries will shape the platform’s trajectory for years to come.
What You Will Do:
- Design and ship end‑to‑end features using React, Next.js, and Python/FastAPI to help users explore uncertainty through synthetic populations.
- Orchestrate complex AI components into a reliable, explainable system that provides trustworthy outputs for high‑stakes decision making.
- Own the entire product lifecycle from vague problem definition to polished execution, balancing rapid momentum with long‑term system health.
The ideal candidate:
- Proven experience building robust web applications with a modern stack including React, Python, and cloud infrastructure (GCP preferred).
- A "thinking engineer" mindset with the ability to thrive in an environment without perfectly specified tickets or rigid corporate ceremony.
- Strong technical judgment and a bias toward action, comfortable working 4 days a week in a high‑intensity London‑based office environment.
Product / Software Engineer at £10M+ post-seed decision infrastructure startup in London employer: Jack & Jill
Join a dynamic and innovative post-seed startup in London, where you'll collaborate with a high-calibre founding team to build cutting-edge decision infrastructure. Our culture fosters creativity and agility, offering you the chance to make impactful architectural decisions while enjoying a flexible work environment. With a focus on employee growth and development, we provide unique opportunities to shape the future of AI-driven solutions in a supportive and engaging atmosphere.
StudySmarter Expert Advice🤫
We think this is how you could land Product / Software Engineer at £10M+ post-seed decision infrastructure startup in London
✨Tip Number 1
Network like a pro! Reach out to people in the industry, especially those connected to the startup scene. Use platforms like LinkedIn to connect with current employees or alumni from your university who might have insights into the company.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your projects, especially those using React, Python, or any relevant tech. This is your chance to demonstrate your 'thinking engineer' mindset and how you tackle complex problems.
✨Tip Number 3
Prepare for the interview by understanding the company's mission and the challenges they face. Be ready to discuss how your experience can help them navigate ambiguity and build robust decision infrastructure.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen. Plus, it shows you're genuinely interested in being part of the team and contributing to their exciting journey.
We think you need these skills to ace Product / Software Engineer at £10M+ post-seed decision infrastructure startup in London
Some tips for your application 🫡
Show Your Passion for Problem-Solving:When writing your application, let us see your enthusiasm for tackling complex problems. Share examples of how you've navigated ambiguity in past projects and how you approach decision-making in uncertain situations.
Highlight Your Technical Skills:Make sure to showcase your experience with the tech stack mentioned in the job description, like React, Python, and cloud infrastructure. We want to know how you've used these tools to build robust applications and what impact your work has had.
Be Authentic and Personal:We love getting to know the real you! Don’t just list your qualifications; tell us your story. What drives you as an engineer? How do you approach challenges? A personal touch can make your application stand out.
Apply Through Our Website:To ensure your application gets the attention it deserves, please apply through our website. This helps us keep everything organised and makes it easier for us to connect with you about this exciting opportunity!
How to prepare for a job interview at Jack & Jill
✨Know Your Tech Stack
Make sure you’re well-versed in React, Python, and FastAPI. Brush up on your knowledge of cloud infrastructure, especially GCP, as this will be crucial for the role. Be ready to discuss your past projects and how you’ve used these technologies to solve real-world problems.
✨Showcase Your Problem-Solving Skills
Prepare to talk about how you've navigated ambiguity in previous roles. Think of specific examples where you turned vague requirements into successful outcomes. This startup values execution-focused engineers, so demonstrate your ability to bridge gaps between complex AI orchestration and intuitive design.
✨Understand the Company’s Mission
Familiarise yourself with the startup's goal of using AI to model human behaviour under uncertainty. Show genuine interest in their mission and be prepared to discuss how your skills can contribute to building their decision infrastructure. This will help you connect with the founders and show that you’re aligned with their vision.
✨Prepare Questions for Them
Interviews are a two-way street! Prepare insightful questions about the company culture, the team dynamics, and the challenges they face. This not only shows your enthusiasm but also helps you gauge if this is the right fit for you. Remember, they want to see your curiosity and engagement!
