Job Description

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Founding Engineer
Reference: 90210_1761129216 Date Posted: 22.10.25
Full-Stack Software Engineer - London - 5 days a week
Location: London, central, fully onsite (early stage, London platform team)
Salary: Up to 130,000
Seniority: 3-8 years | Permanent | Early hire on a small platform team
I'm working with a well funded early stage AI platform looking for a versatile full-stack engineer to join the London platform team as one of the first engineers.
This role is perfect for someone who loves shipping product, moving fast, and solving novel technical problems that sit at the intersection of data, systems and user experience.
What you'll own

• Deliver a fast, reliable user-facing platform that real customers use every day
• Iterate quickly on product features and infrastructure for novel technical problems
• Own slices of the stack end to end, from SQL and backend logic to front end UX
• Work closely with a tiny, high-calibre engineering team and shape engineering practices and culture

Tech profile I need

• 3 to 8 years of hands-on full-stack experience building production products
• Strong backend experience in Python and SQL, or strong frontend experience in TypeScript + React (we value either path; full-stack candidates ideal)
• Comfortable reading and improving C, Rust, or low-level systems components is a plus
• Product minded: you care about UX, reliability and shipping valuable features quickly
• Excellent communicator. Able to explain trade offs and technical decisions clearly

Why this role is different

• Early hire impact: immediate ownership and visible influence over product direction
• Exposure to hard production problems at the intersection of AI and business processes
• Competitive compensation plus meaningful equity for early employees
• Small tight team where your work will move the needle

Practicalities

• Role: Permanent, London based (flexible working to be discussed)
• Salary band up to 130k (final package dependent on experience)

Job location:
London
Salary:
110000 - 130000 per annum + Equity
Salary per:
annum
Job industry:
Software Development
Job Details
London
Permanent
110000 - 130000 per annum + Equity
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What I wanted from this partnership was to be able to take a step back and free me up to focus on my other responsibilities in addition to recruitment. Working with Corecom alone made everything so straight forward. I wasn't having to chase up several agencies and there was no duplication of candidates. Tunstall was their no1 focus and I trusted them to deliver, which they did. There was noticeable improvements in CV-to-interview and interview-to-placement ratios which was a real pain point before changing the model on how we worked together. Working on a retained basis gave me confidence that extra effort and resource would be put in to filling the roles.
Sarah Ibbetson, Internal Resourcing Manager, Tunstall Healthcare UK
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