Senior Machine Learning Engineer, Recommendation

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Sekai

WebsiteLinkedInAll Job Openings

11 - 50 employees

Founded 2023

🤖 Artificial Intelligence

☁️ SaaS

👥 B2C

💰 $6M Seed on 2024-12

Artificial Intelligence • SaaS • B2C

Sekai is an AI-powered interactive content platform where anyone can create, play, remix, and share mini-apps in seconds. It hosts a community-driven ecosystem of user-created playable content — mini-apps, cards, polls, creative tools, fan interactions, quizzes, stories, music and sound, simulators, and other short interactive experiences. Sekai enables instant play on web and mobile, with deeper creation and remix tools available in its app. The platform emphasizes remixability, creative expression, and rapid creation of small interactive experiences powered by AI.

📋 Description

• Build and improve recommendation and search systems across feed, discovery, search, and content continuation surfaces. • Own retrieval and ranking systems, including candidate generation, embedding-based retrieval, two-tower models, ranking features, and online serving quality. • Design, launch, and analyze recommendation/search experiments end-to-end, then use the data to iterate quickly. • Improve recommendation quality for new users, new content, and fast-changing content pools. • Build user, content, creator, and session-level representations from behavioral signals. • Partner with product, data, and engineering teams to define metrics, run experiments, and ship measurable improvements to retention, engagement, and content distribution. • Build practical ML systems that can move from prototype to production quickly, with clear monitoring and evaluation. • Help shape the long-term ML architecture for AI-native content discovery.

🎯 Requirements

• 5+ years of industry experience building production ML systems, with senior-level ownership of recommendation, search, ranking, ads ranking, feed ranking, or content discovery systems. • Hands-on experience building recommendation or search systems for consumer apps. • Experience working on entertainment, social, gaming, short-form content, creator, or other engagement-driven consumer products. • Strong practical experience with two-tower models, embedding retrieval, candidate generation, ranking, and online/offline evaluation. • Strong product intuition around relevance, retention, engagement, satisfaction, cold start, and content distribution. • Ability to translate messy user behavior into useful modeling signals and practical product improvements. • Strong engineering fundamentals across modeling, data pipelines, backend integration, experimentation, and production ML systems. • High ownership, fast execution, and clear communication in ambiguous product environments.

🏖️ Benefits

• Top compensation package, including competitive salary and meaningful equity. • Remote-first team. • Comprehensive health insurance and benefits.