Founding Software Engineer

This role is for one of the Weekday's clients

Min

Experience:

3 years

Location:

Bay Area

Job Type: full-time

We are seeking a Founding Software Engineer to help build the core agentic AI engine of our product. You will work directly with the founders and CTO to design and ship AI systems that perform real-world tasks end-to-end. This is not a or model-tuning role
—the focus is on building reliable, production-grade AI workflows that solve concrete problems for customers.

You will work on how AI agents plan, execute, and verify complex, messy real-world processes. Audit workflows provide an ideal domain for AI agents, allowing you to define new best practices for agentic software
.

This is an early, high-ownership role. You will shape core product architecture, influence how AI agents behave, and help define how enterprise software is built going forward. You should be excited about working closely with users, iterating rapidly, and shipping features that are used immediately.

Our interview process reflects how we work. We value practical problem solving, product thinking, and building reliable systems in ambiguous environments
. The process is designed to be efficient, respectful of your time, and focused on real work rather than abstract puzzles.

• A short, informal conversation with a founder to discuss your background, goals, and the product vision.
• Opportunity to ask questions and determine mutual fit.

• A hands‑on session focused on solving practical problems.
• You may work through a small feature or system similar to what you would build in the role.
• Language‑agnostic; production stack includes Python, SQL, and React. You may use your preferred tools, including AI coding assistants.

• Collaboration with founders on realistic, end‑to‑end feature‑building exercises.
• Focus on problem solving, product judgment, and shipping high‑impact work.
• Time to discuss roadmap, culture, and daily work expectations.

• The full process typically takes 1–2 weeks.
• We accommodate candidates with competing offers or tight timelines.

You will help define the future of agentic AI software
, building systems that allow users to describe their goals and let AI handle execution.

This role offers the chance to work directly with founders, take ownership of core architecture, and build production‑grade AI systems used in real‑world workflows from day one.

• Applied AI Engineer
• Full‑stack software development
• Building production‑grade agentic AI systems
• Designing and shipping core AI engine features