Ibbi Mujir · AI-Native Product Leader

Selected Work

2020 – 2022

0→1GrowthMonetizationScale

Built Reddit's most widely-adopted new product of the era, from a one-quarter MVP to hundreds of millions of users

Reddit had no identity layer. Users were anonymous, engagement was transactional, and there was no mechanism for self-expression, digital ownership, or the kind of emotional investment that drives long-term retention.

Pitched executive leadership on a digital avatar system and scoped the MVP to a single quarter: small enough to move fast, big enough to validate. The MVP generated extraordinary community excitement: Reddit users had been craving a way to give themselves a "face" on a platform that had never offered one.

Scaled Avatars to hundreds of millions of users, one of Reddit's most broadly adopted consumer products
Frequently cited as a top retention driver for Reddit Premium
Among the highest per-session engagement rates on the platform

“The key unlock wasn't features. It was identity hunger. Reddit users had been anonymous for 15 years. The moment we gave them a face, they couldn't stop designing it.”

2024 – 2026

AIGrowthScale

Led LLM-native product work within Reddit's growth organization, shipping systems to production with a very small team

New-user experiences for paid acquisition audiences weren't strong enough to retain them, and content operations needed to scale well beyond what a traditional editorial team could produce. Both problems needed LLM-native solutions, built and run by a small team.

Led AI-native product work inside Reddit's growth organization, building LLM-powered systems that improved new-user experiences and expanded content operations. The work spanned personalization, content pipelines, and internal tooling, informed by a strong point of view that prompt engineering should be a product surface rather than an engineering concern, with non-engineers given direct control over model behavior.

Shipped multiple LLM-powered systems to production inside a public-company growth org
Meaningfully improved retention and unit economics of paid acquisition audiences
Designed human-in-the-loop tooling that gave non-engineers direct control over model behavior

“The most underrated thing about LLMs in production is prompt engineering as a product surface. The teams who figure out how to give non-engineers control over model behavior will build things the teams who treat it as an engineering problem can't.”

2019 – 2021

0→1MonetizationGrowthScale

Built Reddit's virtual goods and subscription ecosystem from zero, growing non-ad revenue by an order of magnitude

Reddit's only non-advertising revenue was Reddit Gold: a novelty feature with no scalable infrastructure, no virtual goods ecosystem, and no subscription product.

Designed the complete monetization system from the ground up. Built the Coins virtual currency infrastructure: coin pack pricing, purchase funnel, and the Award selection and granting UX distributed across feed and comment threads. Created the visual content library for Awards, a brand-iconic asset library still in use across Reddit today.

Grew Awards/Gold from a novelty feature into a meaningful non-advertising revenue line, an order-of-magnitude increase in roughly two years
Expanded the Reddit Premium subscriber base by an order of magnitude via annual subscription design and targeted in-product conversion
Designed the Free Awards try-before-you-buy funnel that meaningfully expanded the awarding population, building behavioral muscle memory before any purchase prompt appeared

“The Free Awards mechanic was the most important product decision in the monetization system. Letting people experience the full loop for free wasn't giving revenue away. It was the only way to create the behavioral foundation that made paying feel natural.”

Humtap

2018 – 2019

0→1AIFounding

Co-founded a generative AI music platform and raised a $12M Series A, in 2018, before transformers

Building a compelling AI creation product before diffusion models, before ChatGPT, before "generative AI" was a mainstream concept (with model capabilities that were genuinely constrained), and convincing institutional investors to back it.

Co-founded Humtap and led product from seed through Series A. The core product: users provided melody and rhythm prompts, and the composition and sound design engines interpreted those prompts to generate full songs in various styles, an early generative creation platform predating the short-form video AI creation wave by several years.

Closed $12M Series A led by Mubadala
Selected by Apple for the WWDC 2018 developer showcase
Built and managed a distributed team across London, San Francisco, and Krakow

“Building AI products before the models were good forces you to become a better product thinker. You can't hide behind the technology. Every design decision has to compensate for capability gaps, and that instinct is more valuable now, not less.”

Built Reddit's most widely-adopted new product of the era, from a one-quarter MVP to hundreds of millions of users

Led LLM-native product work within Reddit's growth organization, shipping systems to production with a very small team

Built Reddit's virtual goods and subscription ecosystem from zero, growing non-ad revenue by an order of magnitude

Co-founded a generative AI music platform and raised a $12M Series A, in 2018, before transformers

Intellectual Vehicles