Job Overview
Location
London
Job Type
Full-time
Category
Marketing
Date Posted
March 21, 2026
Full Job Description
đź“‹ Description
- • As a Full Stack Growth Builder at Fleek Technologies Inc., you will architect and own the entire customer lifecycle marketing system, transforming how the company engages users from onboarding through monetisation by treating AI as a core toolkit rather than an add-on, directly impacting retention and revenue in a mission-driven marketplace tackling fashion waste.
- • You will design adaptive CRM systems that use real-time user signals to determine optimal messaging timing, channel, and content; build rigorous experimentation frameworks using holdouts and causal inference to measure true incremental impact; lead AI-powered personalisation and content generation at scale; analyse performance to surface high-leverage opportunities; manage communication frequency to preserve user trust; and collaborate on reseller-facing tooling like cross-listing features to increase stickiness across marketplaces.
- • Fleek is a post-Series B, hyper-growth startup headquartered in London with ~100 employees globally (~20 in the London office), backed by a16z, Y Combinator, and other top investors, building AI-native infrastructure to digitise the global secondhand fashion supply chain and divert millions of garments from landfill each year.
- • You will work in a high-ownership, non-hierarchical culture where curiosity, customer obsession, and absolute ownership are valued, with the opportunity to ship systems that drive same-week decisions, grow your expertise in AI-native growth engineering, and contribute to a projected $350B secondhand fashion market by 2027.
- • This role offers the chance to evolve from executing campaigns to architecting self-improving growth systems, gain deep experience in causal inference and AI-driven personalisation at scale, and leave a measurable impact on both business outcomes and environmental sustainability by making secondhand fashion the first choice globally.
🎯 Requirements
- • 4-7+ years of lifecycle, CRM, or growth marketing experience with proven ownership of strategy that directly impacted retention and revenue
- • Hands-on experience applying AI to content generation, personalisation, segmentation, or decisioning within production CRM systems
- • Deep expertise in experimentation methodologies including lift testing, holdouts, causal inference, and incrementality measurement
- • Strong SQL skills for independently extracting, transforming, and analysing large, complex datasets
- • Experience designing adaptive decisioning systems (rules-based, algorithmic, or hybrid) for messaging optimisation, timing, and frequency
🏖️ Benefits
- • In-office work model in London’s Shoreditch/Aldgate East area with 3-4 days per week expected after an initial six-month period of prioritised office presence to build relationships and context
- • Genuine flexibility and autonomy earned through trust and performance, reflecting Fleek’s culture of treating employees as adults
- • Opportunity to work with a mission-driven team that has saved over 9 million items from landfill and is scaling rapidly in a $350B market opportunity
- • Exposure to cutting-edge AI applications in lifecycle marketing, including FleekSort and AI-powered personalisation systems
- • Access to a high-ownership, fast-moving environment backed by top-tier investors (a16z, Y Combinator, HV Capital) and advised by operators from Depop, Shopify, and Postmates
Skills & Technologies
About Fleek Technologies Inc.
Fleek is a decentralized platform that simplifies the process of building and deploying web applications on decentralized networks. It allows developers to easily host websites and dApps on protocols like IPFS and Arweave, providing a seamless and secure way to own and control their online presence. Fleek integrates with popular development tools and services, enabling users to manage their domains, SSL certificates, and content through a user-friendly interface. The platform focuses on empowering creators and businesses to leverage the benefits of decentralization, including censorship resistance, enhanced privacy, and direct ownership of digital assets, without requiring deep technical expertise in blockchain technologies.
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