Founding Engineer (Full-Stack with AI)

OpenFunnel (YC F24); San Francisco (CA); On-site; USD 120,000 - 140,000; Full time

Job summary

A cutting-edge tech startup in San Francisco is seeking a Founding Full Stack Engineer to drive AI innovations and enhance customer experiences. The candidate will collaborate closely with technical founders to build and optimize applications. Ideal for someone with extensive experience in full stack development, AI agents, and advanced technology stacks. Competitive salary between $120,000 - $140,000 per year is offered.

Qualifications

• Experience building and scaling Full Stack applications from 0 to 1.
• Familiarity with handling Sev-1 incidents.
• Good knowledge of cloud infrastructure and experience with cloud providers.

Responsibilities

• Perform extensive prompt engineering for AI.
• Optimize data and compute consumption.
• Handle long-running agent workflows.

Skills

JavaScript

Python

TypeScript

NextJS

FastAPI

Postgres

Docker

Kubernetes

Job description

We’re looking for OpenFunnel’s Founding Full Stack Engineer (with AI)

You’ll work directly with extremely technical founders, be close to customers, ship fast, and make high-impact technical decisions that shape the future of the product and company.

You’ll be given full view in customer’s pain points and how your contribution makes their lives easier.

Responsibilities

• Extensive Prompt Engineering, Evaluation, Monitoring - optimizing for accuracy and speed.
• Optimize agent data and compute consumption optimization
• Handle durable and parallel execution of long running agent workflows
• Work with vector Databases, Re-rankers and writing large scale data aggregation and processing pipelines.
• Attending user office hours with founders and understand customer pain points to translate to Prompts.

Qualifications

• You have built and scaled Full Stack applications from 0 to 1.
• You have stories of handling Sev-1 incidents
• You are well versed in JS, Python, Typescript and frameworks like NextJS, FastAPI, Postgres, Auth frameworks etc.
• You have good cloud infra knowledge and have worked with Docker, Helm, Kubernetes - any cloud provider like AWS, Azure or GCP.
• Experience with AI agents and LLM pipelines.
• Strong opinions about performance or API design and Debugging skills.
• Ability to understand, communicate and justify trade-offs between speed and complexity.

Compensation

$120,000 - $140,000 per year

(Actual compensation may vary based on experience and qualifications)

Why join OpenFunnel to do your life's work

• We are building Lovable for GTM, the last GTM engineer.
• YC‑backed and seed‑funded, with angels from the GoogleGemini team and investors behind PikaLabs, MistralAI, and Rippling.
• Agentic LLMs now search, scrape, listen, and structure data into high‑value insights, making static databases like Apollo, ZoomInfo, and LinkedIn obsolete.
• We believe the GTM engineer will be the first engineering role fully automated by AI agents.
• Demand is extremely high, and we aim to scale as quickly as possible.
• Join us if you want to work with a state of the art tech stack and customers who are building world changing AI products

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

• Industries

  Software Development

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