Founding Engineer

Weekday AI•San Francisco, CA

About The Position

This role is for one of the Weekday's clients 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

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

Responsibilities

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.
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.
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.
Apply ML models for user experience enhancements such as media transformation, image tagging, personalization, or fine-tuning LLMs.