Founding Engineer — Infrastructure for Agent-Led Growth

Lightsage; San Francisco (CA); On-site; USD 120,000 - 200,000; Full time

Job summary

Lightsage, based in San Francisco, CA, seeks a Founding Engineer to design, build, and scale core infrastructure powering agent-led growth for developer tools and platforms.

You will collaborate with the founders to define technical architecture, implement features, and create benchmarks and analytics to measure how agents interact with APIs, CLIs, and MCPs. This role emphasizes ownership and end-to-end delivery on-site.

Qualifications

• Ability to translate vague customer problems into shipped solutions.
• Experience in early-stage startups is a plus.
• Strong written communication for cross-functional teams.
• Familiarity with Next.js, FastAPI, Supabase, and Azure.

Responsibilities

• Design, build, and scale core infrastructure powering agent-led growth.
• Define technical architecture and data pipelines with founders.
• Create benchmarks and analytics to measure agent interactions.
• Ship end-to-end solutions from prototype to production.

Skills

Product/problem solving

Startup experience

Written communication

Tools

Next.js

FastAPI

Supabase

Azure

Job description

Lightsage, based in San Francisco, CA, seeks a Founding Engineer to design, build, and scale core infrastructure powering agent-led growth for developer tools and platforms.

You will collaborate with the founders to define technical architecture, implement features, and create benchmarks and analytics to measure how agents interact with APIs, CLIs, and MCPs. This role emphasizes ownership and end-to-end delivery on-site.