Software Engineer
Build AI voice agents for trades businesses using Python, TypeScript, cloud infrastructure, event-driven systems, and third-party integrations. This Series A, YC-backed startup is scaling rapidly with real revenue, and you will own features end-to-end as a founding engineer.
Free Tailor for ATS: 10/10 runs left
Founding Software Engineer – AI Voice Agents – London office based – upto £250k
Ever built something from zero and watched it become the backbone of a company?
Love owning a problem end to end - from customer conversation to shipped code?
Want to work with cutting-edge AI in a business that's actually scaling, not just theorising?
If that sounds like you, keep reading.
The Challenge
This is a Series A startup (fresh off a $13m raise, YC-backed) building AI voice agents for trades businesses - agents that answer calls, handle WhatsApp and email, take bookings, process payments, and run the CRM the way a human would.
Revenue's growing ~30% month on month. They've gone from founders living and breathing AI in San Francisco to a business shipping fast and scaling hard. Now they need a founding engineer to help build the next chapter.
This isn't a "nice to have" hire. You'll shape how the product works, how the team operates, and how the company grows.
What You'll Be Building
Core product features across the stack - Python, TypeScript, cloud infra, event-driven systems, third-party integrations
Solutions owned end to end - working directly with customers to understand needs, scope the build, and deliver outcomes
The right thing at the right speed - hacking an MVP when speed wins, investing in scalable foundations when it counts
A team that raises its own bar - testing, documentation, reliability, security, done properly and shared with others
Why This Role Is Different
Founding-level ownership from day one, not just a seat on the team
Real customers, real revenue, real problems - not a lab experiment
A business moving fast with the funding to back it
Genuine influence over the product and the culture as the team scales
About You
Strong software engineering fundamentals - you can design, debug, and ship reliable systems
Proficient in Python or TypeScript (or clear proof you can pick up what's needed)
Experience shipping AI products end-to-end - startup, side project, open source, or at scale
Comfortable across the stack - frontend, backend, infra, wherever the problem is
Confident working directly with customers or non-technical stakeholders to scope and deliver
A track record that shows drive - something you've launched, contributed to, or taken ownership of when nobody else would
Bonus if you have:
Early-stage startup experience, especially in AI, voice platforms, or event-driven systems
Familiarity with modern cloud infra - Kubernetes, serverless, distributed systems
Evidence of customer empathy - support, founder, or just building things that solved real pain
What's on Offer
Competitive salary & equity
AI-focused learning & development
Team socials & annual offsites (last year: Greece)
Private healthcare
Interested?
Apply directly or reach out to me for a confidential chat:
📧 mo@mbnsolutions.com
📞 0203 773 6498