Founding Engineer

This role is for one of the Weekday's clients Min Experience: 3 years Location: San Francisco, US, San Francisco Bay Area JobType: full-time As a Founding Engineer, you’ll play a pivotal role in shaping the core product, engineering culture, and technical architecture from the ground up. This role demands creativity, ownership, and agility to solve complex problems end-to-end while building features that will be used by millions. Requirements What You’ll Do Design and build core product experiences for web and mobile. Tackle challenging problems from start to finish — from intuitive camera interactions to distributed search pipelines or agent frameworks. Collaborate closely with the founding team to define product direction and architecture. Establish engineering best practices, culture, and processes from day one. Application Engineering (Full-stack) Focus Build cutting-edge map-based and interactive user experiences for both mobile and web. Develop with TypeScript and React for web. Work with Swift (iOS) or Kotlin/Java (Android) for mobile platforms. Create delightful, pixel-perfect UIs optimized for performance in rich, dynamic environments. Contribute to backend systems in TypeScript, completing full end-to-end features. Data / AI Engineering Focus Develop the intelligence powering product experiences — including search, agents, pipelines, and scalable data infrastructure. Work with Python and/or TypeScript across data pipelines and backend systems (Snowflake, DBT, Elastic, etc). Build AI-powered agents and applications leveraging LLMs. Handle systems at scale — whether high data volume or request throughput. (Bonus) Apply ML models for user experience enhancements such as media transformation, image tagging, personalization, or fine-tuning LLMs. Skills & Experience TypeScript, ReactJS, React Kotlin, Java, Swift Python Strong foundation in end-to-end feature ownership and system design Ability to work independently on hard technical problems with speed and agility