Founding Member of Technical Staff

Glen; San Francisco (CA); On-site; USD 180,000 - 240,000; Full time

Job summary

Glen is seeking a founding engineer to own end-to-end product development and build the foundations of our platform. You will drive the full stack, from user experience to infrastructure, and relentlessly pursue the next improvements that move the product forward for everyone.

You will design benchmarks, measure context impact on the agent, and ship durable, high-volume workflows. You’ll own customer outcomes across teams, and balance speed with reliability in a fast-moving early-stage startup.

Qualifications

• Built full-stack products from zero to one end-to-end deployment.
• Experience handling high-volume systems and durable workflows.
• Founding experience or significant startup involvement.
• Contributed to large open-source projects or personal side projects.

Responsibilities

• Design benchmarks to measure context improving agent performance.
• Own customer experience end-to-end and deploy with empathy.
• Build scalable systems for fast shipping without breaking things.
• Prioritize the 20% of work that delivers 80% of value.

Skills

TypeScript

Next.js

React

Tailwind

tRPC

Postgres

Inngest/Temporal

MCP

CLI

Plugins

Tools

MCP

CLI

Plugins

Job description

Everyone owns what they work on, end to end. As a founding engineer you're building the foundations of the company. The bar is simple: do everything within your power to get the job done, and then go find the things that aren't in your power yet and get those done too.

Every MTS at Glen must be comfortable with

You've taken full-stack products from zero to one. You start from first principles on what the best experience would be and work backwards from there. Users will always ask for things, and you can tell the difference between a one-off request and the change that moves the product forward for everyone. You work across the stack and have the right amount of breadth to execute, measure and iterate end to end.

You know what's out there, you have opinions about what to use when, and you know when not to. You've built long-running durable complex workflows, things that have to survive retries and partial. We ingest every agent session, message, PR, ticket and call across every team we serve. The volume is massive, and we are responsible for ensuring not a single thing gets missed. You are the person who finds the extra 200ms.

Research & Pipeline Optimization

You know the literature and you're creative on top of it. We're trying to measure something that is very hard to measure: what context makes the user’s agent work better? You can design benchmarks that truly measure the thing, make the judgment calls that go into them, and turn the results into what actually works in the real world. A lot of what we are working towards is uncharted territory, so expect to do a lot of thinking.

Always Forward Deployed

You own the customer experience end to end. You have deep empathy for the people you deploy with, and you take responsibility for their outcome, not just your part of it. You close the loop with every other function: what you hear from customers turns into signal that improves the product, the infra and the research across the board.

• You build with agents and for agents and their developers & end users.
• You build the systems that let a team ship fast without breaking things.
• You have taste.
• You build trust with the people around you. You admit what you don't know.
• You know what to prioritize. 80% of the value comes from 20% of the work, and you can find that 20%.
• You've worked somewhere that handles enormous volume.
• You've worked in our stack: TypeScript, Next.js, React, Tailwind, tRPC, Postgres, Inngest/Temporal, MCP, CLI, plugins.
• You've been a founder.
• You've been a real contributor to a large open-source project, or you have a serious side project.
• You've worked at an early-stage startup before.