Jack & Jill/External ATS - Senior Backend Software Engineer at Joinfleek.com
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Requirements
• 3–6 years of backend experience with Node.js and TypeScript, specifically building high-traffic consumer marketplaces or fintech products. • Proven ability to design complex system architectures and data models from scratch while navigating the ambiguity of a fast-paced startup. • Product-minded engineer who prioritizes commercial outcomes and user experience over pure technical perfection, ideally with interest in AI deployment. • 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. • Step 1. Visit our website https://jackandjill.ai/jack/job-listing?utm_source=job_listing&utm_medium=job_board&utm_campaign=a3d9e4a2-dacc-400a-a718-972816f596d4. • 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. • 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."
Responsibilities
• Design and scale backend systems for item discovery, search, and complex multi-continent payment and credit workflows. • Architect the integration between FleekSort’s AI classification engine and the live marketplace to enable real-time inventory structuring. • Lead technical direction within a senior squad, mentoring junior engineers and defining engineering standards for a rapidly growing 100-person team.
Benefits
• Join a hyper-growth Series B startup that has raised ~$50M from top-tier investors including a16z, Y Combinator, and HV Capital. • Work on FleekSort, a proprietary AI model that is fundamentally transforming global supply chains by automating the grading and pricing of unique items at scale. • Massive environmental impact: the platform has already saved 9 million items from landfills and is tripling in size year-on-year.
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