Software Engineer at fast-growing AI startup

6 days ago


London, Greater London, United Kingdom Jack & JillExternal ATS Full time £75,000 - £150,000 per year

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.

Software Engineer

Company Description: fast-growing AI startup

Job Description:
Join an early-stage AI startup redefining innovation discovery and protection. This greenfield opportunity involves building extraordinary systems from scratch, working primarily on the backend, integrating with LLMs, and collaborating directly with founders. You'll design, ship, and iterate products with immediate, visible customer impact, shaping a company scaling at breathtaking speed.

Location: London, UK

Why this role is remarkable:

  • True greenfield opportunity with no legacy code, offering freedom to solve challenging technical problems.

  • Backed by tier-one investors and industry leaders, achieving seven figures in recurring revenue within its first year.

  • High ownership, direct impact, and the potential for life-changing equity in a rapidly scaling environment.

What you will do:

  • Build production-quality software, primarily focusing on backend development.

  • Integrate with LLMs and collaborate directly with the founding team to design and ship products.

  • Speak with customers, think critically from their perspective, and iterate based on feedback.

The ideal candidate:

  • Strong experience building production-quality software (Java, TypeScript, or Python).

  • Demonstrates curiosity and adaptability, learning new technologies quickly and effectively.

  • Possesses hunger, drive, and an ownership mentality, thriving in fast-paced, ambiguous environments.

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.



  • London, Greater London, United Kingdom Jack & Jill Full time £60,000 - £120,000 per year

    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.Software EngineerCompany Description:fast-growing AI startupJob Description:Join an...


  • London, Greater London, United Kingdom Jack & JillExternal ATS Full time £80,000 - £120,000 per year

    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 Engineer Company Description: fast-growing AI startupJob Description:As a...


  • London, Greater London, United Kingdom Jack & JillExternal ATS Full time £100,000 - £120,000 per year

    This is a job that Jill is helping to recruit for on behalf of one of our customers. To apply, speak to Jack.Title: Senior AI Product Engineer (£100k-£120k + Equity) at Fast-growing AI startupJob Title:Senior AI Product EngineerSalary:£100k-£120k + EquityCompany Description:Fast-growing AI startupJob Description:Join a well-funded AI startup focused on...


  • London, Greater London, United Kingdom Jack & Jill Full time £80,000 - £1,200,000 per year

    This is a job that Jill is helping to recruit for on behalf of one of our customers. To apply, speak to Jack.Title:Senior AI Product Engineer (£100k-£120k + Equity) at Fast-growing AI startupJob Title:Senior AI Product EngineerSalary:£100k-£120k + EquityCompany Description:Fast-growing AI startupJob Description:Join a well-funded AI startup focused on...

  • Software Engineer

    1 week ago


    London, Greater London, United Kingdom Luma AI Full time £1,200,000 - £2,000,000 per year

    About Luma AI Luma's mission is to build multimodal AI to expand human imagination and capabilities. We believe that multimodality is critical for intelligence. This requires a massive, reliable, and performant GPU infrastructure that pushes the boundaries of scale. Our SRE team is the foundation of our research and product velocity, responsible for the...

  • AI Engineer @

    3 days ago


    London, Greater London, United Kingdom Eloquent AI Full time

    Meet Eloquent AI (YC X25)At Eloquent AI, we're building the next generation of AI Operators—multimodal, autonomous systems that execute complex workflows across fragmented tools with human-level precision. Our technology goes far beyond chat: it sees, reads, clicks, types, and makes decisions—transforming how work gets done in regulated, high-stakes...


  • London, Greater London, United Kingdom Jack & JillExternal ATS Full time £60,000 - £1,200,000 per year

    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 Design EngineerCompany Description: Fast-growing design-focused startupJob...

  • Software Engineer

    1 week ago


    London, Greater London, United Kingdom Luma AI Full time £70,000 - £120,000 per year

    About Luma AI Luma's mission is to build multimodal AI to expand human imagination and capabilities. We believe that multimodality is critical for intelligence. To go beyond language models and build more aware, capable, and useful systems, the next step function change will come from vision. So, we are working on training and scaling up multimodal...


  • London, Greater London, United Kingdom Jack & JillExternal ATS Full time £100,000 - £140,000

    This is a job that Jill is helping to recruit for on behalf of one of our customers. To apply, speak to Jack.Title: Founding Software Engineer (£100k-£140k + Equity) at Well-funded AI voice agent startupJob Title:Founding Software EngineerSalary:£100k-£140k + EquityCompany Description:Well-funded AI voice agent startupJob Description:Join a well-funded...

  • Software Engineer

    7 days ago


    London, Greater London, United Kingdom Luma AI Full time £80,000 - £150,000 per year

    About Luma AI Luma's mission is to build multimodal AI to expand human imagination and capabilities. We believe that multimodality is critical for intelligence. To go beyond language models and build more aware, capable, and useful systems, the next step function change will come from vision. So, we are working on training and scaling up multimodal...