Founding Engineer: Build Core Infra for Agent Tools

Lightsage, Inc.; San Francisco (CA); On-site; USD 150,000 - 230,000; Full time

Job summary

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

You will work with the founders to define technical architecture, implement new features, and create benchmarks and analytics that measure agent interactions with APIs, CLIs, and MCPs. The role includes writing production code, data pipelines, dashboards, and customer collaboration to ship end-to-end solutions from prototype

Qualifications

• Translate loosely defined customer or product problems into shipped solutions.
• Startup founder or early-stage startup operator experience is a plus.
• Strong written communication and ability to explain technical decisions clearly.
• Experience with Next.js, FastAPI, Supabase, Microsoft Azure.

Responsibilities

• Write high-quality production code.
• Build data pipelines and dashboards.
• Integrate with third-party tools and services.
• Experiment with agent frameworks and AI coding systems.
• Collaborate with customers to understand needs and ship end-to-end solutions from prototype to production.

Skills

Startup experience

Strong written communication

Technical decision communication

Problem solving

Tools

Next.js

FastAPI

Supabase

Microsoft Azure

Job description

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

You will work with the founders to define technical architecture, implement new features, and create benchmarks and analytics that measure agent interactions with APIs, CLIs, and MCPs. The role includes writing production code, data pipelines, dashboards, and customer collaboration to ship end-to-end solutions from prototype