Junior Software Developer jobs in United Kingdom

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?Founding Software Engineer - AI Start-Up (Central London | On-Site | Equity + Salary)??

One of London’s most promising AI start-ups are looking for their first few Founding Engineers! Backed by top-tier investors and led by an elite founding team from Oxford, Cambridge, and Imperial, this venture is already attracting serious attention within the AI space!!

Currently in stealth mode, they’re now searching for a Founding Software Engineer to join the core team - someone ambitious, technically exceptional, and ready to help build the company from the ground up!

?About the Company

Founded by alumni of successful AI start-ups, this is a business led by people who’ve done it before - and done it well. With strong funding and a clear product vision, they're building cutting-edge technology that leverages the latest advances in AI to solve high-impact problems.

• Python - core backend and ML integration
• AWS - scalable, production-grade infrastructure

This is a hands-on role where you’ll work across the stack and have real influence over the architecture, tooling, and direction of the product.

? What They’re Looking For:

• A top-tier academic background – Oxbridge, Imperial, or equivalent
• 4+ years of experience in high-growth start-up environments
• Strong engineering fundamentals and a deep product mindset
• Experience building and scaling real-world applications from scratch
• Passion for AI and enthusiasm for working in a fast-moving, collaborative setting
• A team player who thrives in a full-time, in-office environment (Central London - 5 days/week)

? What’s on Offer:

• Highly competitive salary
• Significant equity stake – this is a founding-level opportunity
• Close collaboration with some of the brightest minds in AI and software
• A chance to help shape company culture, technology, and trajectory
• The energy, speed, and ownership of an early-stage start-up - with real backing

If you’re an ambitious engineer ready for your next big challenge, and want to be part of something truly special, this could be the opportunity that defines your career!