Senior Fullstack Engineer (£110k-£130k) at Midnite

This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers. She will pick the best candidates from Jack's network The next step is to speak to Jack . Job Title: Senior Fullstack Engineer - Nucleus Salary: £110k-£130k Company Description: Midnite - Series C betting platform backed by The Raine Group Job Description: Join a greenfield team building Midnite’s internal back-office platform from the ground up. As a player-manager, you will lead three engineers while remaining hands-on with Python and Vue. You will drive AI experimentation, leveraging LLMs and RAG to automate engineering workflows and enhance operational efficiency across this high-growth, Series C startup. Location: Remote, UK Why this role is remarkable: Lead a brand new "Nucleus" team with full autonomy to shape the internal platform and define engineering standards for the entire organization. Work for a well-funded Series C company that has raised over $75M from prestigious investors like The Raine Group, ensuring stability and scale. Drive the practical application of AI, moving beyond chatbots to productionize LLM-powered tools that directly improve developer experience and business operations. What you will do: Design and maintain the backend systems and operational dashboards that power Midnite’s internal platform using Python, Flask, and AWS. Lead and mentor a team of three engineers, managing sprint planning, professional development, and technical direction as a player-manager. Prototype and ship AI-powered improvements such as automated code review tooling, intelligent alerting, and internal assistants for non-technical teams. The ideal candidate: 7+ years of backend engineering experience with strong proficiency in Python and a high bar for software architecture and engineering standards. Proven experience leading or mentoring engineers in a hands-on capacity while successfully delivering complex technical projects in a production environment. Practical experience integrating LLMs and AI APIs into real products, with a curiosity for emerging frameworks like LangChain, LlamaIndex, or RAG pipelines. Who are Jack & Jill? Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support. And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate. Next steps Step 1. Visit our website . Step 2. Click 'Talk to Jack' . Step 3. Talk to Jack so he can understand your experience and ambitions. Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role. Step 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction. Step 6. If not, Jack will find you excellent alternatives. All for free. We never post fake jobs This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network. Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description. We appreciate this can make them look a bit suspect, but there isn't much we can do about it. Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.