Senior AI Full Stack Engineer

Intro....

MRJ have partnered exclusively with a hyper growth SaaS company embarking on an exciting new AI first journey.

We're working with the CTO to spin out a new 'AI first' team from scratch (Product Lead, Engineers, QA) focussed on building and launching high-impact and groundbreaking AI products & features that will a) take the company to new levels and b) take the market by storm.

"As a founding Full stack Engineer within this new AI venture, you'll join a high-performing engineering team that is being build from scratch to create innovative AI and LLM products from the ground up. We move fast, build lean, and iterate quickly. If you love solving real problems, experimenting, and shipping impactful products, this one’s for you."

Day-to-day you will.....

• Build AI-powered products from zero to one, rapidly prototyping and scaling
• Design and develop end-to-end solutions using modern engineering practices
• Work hands-on with Claude, GPT and LLMs to build intelligent products
• Develop MVPs at pace, iterate based on real feedback, and optimise for speed-to-value
• Collaborate with Product, Design and ML teams to bring ideas to life
• Help shape engineering standards, architecture, and technical direction

We're looking for experienced Senior Engineers, passionate about AI & using tools like Claude, and with a track record working with tech first startup or scale-up companies.

And it is expected that you will offer:

• Proven experience building AI, LLM, or intelligent automation products
• An MVP mindset, agile, experimental, shipping products at pace
• Proficiency in one or more modern tech stacks: TypeScript / Node.js, Azure / Cloud-native architecture, .NET Core, Go (Golang)
• Pragmatism, you care about impact, not perfection

Interested?

Opportunities like this don't come around every day!!! If you're excited by building from scratch, love shipping fast, and want to shape the future of a super exciting company, we’d love to talk. Apply today with your CV or Linekdin profile and the team will be in touch.

Please note:

Location: The role is remote first with meetups every 2 weeks in Manchester

Salary: £80k to £100k

Start date: Ideally Jan 2026 (earlier start date is fine too)