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  "job_description": "This job is brought to you by Jobs/Redefined, the UK's leading over-50s age inclusive jobs board.\n\nThis is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.\n\nShe will pick the best candidates from Jack's network\n\nThe next step is to speak to Jack.\n\nJob Title: Senior Product Engineer (AI Focus)\n\nSalary: £170,000 - £200,000 + Equity\n\nCompany Description: Gizmo.ai - Fast-growing EdTech startup recently raised a $22M Series A\n\nJob Description:\nJoin the team building the 'Duolingo for Everything.' As a Senior Product Engineer, you will own the core intelligence behind a platform serving 1.5 million monthly users. Reporting to the CEO, you'll design agentic workflows and productionize AI features like automated marking and content generation to help one billion people learn.\n\nLocation: London, UK\n\nWhy this role is remarkable:\n• Exceptional growth trajectory with 1.5M monthly active users and $5M ARR, backed by a recent $22M Series A funding round.\n• High-impact ownership where you will design the core AI engine that sits at the heart of the product, not just side experiments.\n• Work in an elite, flat 10-person engineering team in Shoreditch, collaborating directly with the founders to shape the future of education.\n\nWhat you will do:\n• Design and ship end-to-end AI-driven features using a TypeScript stack, from initial concept through to production iteration.\n• Build and optimize multi-step agentic prompt workflows and structured model pipelines to handle complex learning tasks at scale.\n• Develop internal evaluation frameworks and quality metrics to systematically measure and improve the correctness of AI-generated outputs.\n\nThe ideal candidate:\n• 8+ years of software engineering experience with deep expertise in TypeScript and building robust, user-facing production systems.\n• Proven track record of implementing applied AI, including agentic workflows and structured prompt engineering beyond simple API calls.\n• Strong analytical background with a degree in ML, AI, or a quantitative field (Maths/Physics/CS) from a top-tier university.\n\nWho are Jack & Jill?\nOk, 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.\nAnd 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.\n\nNext steps\nStep 1. Visit our website.\nStep 2. Click 'Talk to Jack'.\nStep 3. Talk to Jack so he can understand your experience and ambitions.\nStep 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.\nStep 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction.\nStep 6. If not, Jack will find you excellent alternatives. All for free.\n\nWe never post fake jobs\nThis isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.\nSometimes 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.\nWe appreciate this can make them look a bit suspect, but there isn't much we can do about it.\nGive 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.",
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