Senior Fullstack Engineer Engineering · Full-time · San Francisco Apply →

Circleback AI, Inc.; San Francisco (CA); On-site; USD 130,000 - 180,000; Full time

Job summary

Circleback AI, Inc. is seeking a software engineer to own and ship features across web, desktop, mobile, and backend. You will build on a stack including React, Next.js, Electron, Swift, and React Native to drive AI-powered outcomes, enhanced search, transcription, and automations.

You’ll contribute to performance and reliability while shipping for thousands of paying customers. The role emphasizes understanding how features fit into the product and technical ecosystem, with a startup mindset

Qualifications

• 3-5 years of experience building and shipping software, preferably at startups.
• Strong product and technical judgment about what to build and how it fits the bigger picture.
• Curiosity and detail-orientation, with a bias toward well-integrated solutions.

Responsibilities

• Build features across web, desktop, mobile, and backend using the Stack (React, Next.js, Electron, Swift, React Native).
• Experiment with AI models and techniques to improve outcomes, search, transcription, and automations.
• Contribute to code reviews and build reusable tooling to raise team quality and velocity.
• Ship features to thousands of paying customers weekly with a focus on product quality and speed.

Skills

React

Next.js

Electron

Swift

React Native

Job description

What you’ll do

You’ll take on a problem, figure out the right approach, build it across the full stack, and ship it. That requires good judgment. It means understanding how a feature connects to everything else, both technically and from a product standpoint. Our foundations stack on each other: better transcription means better AI outcomes, which means better search and automations. An engineer who builds in isolation here will build the wrong thing.

You’ll ship across web (React, Next.js), desktop (Electron, Swift), mobile (React Native), and backend. You’ll work on AI-powered outcomes, search, transcription, on-device recording, performance, and automations. You’ll experiment with new AI models and techniques. And you’ll raise the bar for the team through code review and building reusable tools.

We’re a small team that moves fast. You’ll ship real features to thousands of paying customers every week, not sit in planning meetings.

Who you are

3-5 years of experience building and shipping software, preferably at startups. You’ve made real decisions, not just about implementation, but about what the right product and technical approach was.

An eye for detail. Strong opinions about how things should work. The kind of person who thinks about how something fits into the bigger picture, not just whether the code works.

Drawn to work that compounds. Curious how great products work.

AI-native. The way software gets built is changing fast (exciting). Not just keeping up, but at the frontier. Always looking for ways to get better at doing the work, not just doing the work.

About the interview

1. Initial screen (30min)

2. Technical interview (1h)

3. Technical interview (1h)

4. Paid, in-person work trial (2-3d)

About Circleback

Circleback is building the source of truth for everything said at a company–starting with best-in-class AI meeting notes, action items, and search.

Every meeting will be AI-enabled. But meeting notes are just the beginning. We’re building toward something larger: a platform that captures, organizes, and actions on the context from all conversations across a company–meetings, calls, emails–so teams can actually use what they know.

We’re a small team backed by Y Combinator. Profitable, growing virally, and thousands of paying customers including PostHog, Browserbase, Gumloop, and more.

Why join

• We ship fast with a high bar for quality

• Small team, large problem–the product category we’re building didn’t exist until recently

• Profitable and growing virally through word of mouth

• Software that people actually love and use daily

If you care about craft and want to build something ambitious with a small team that moves quickly, we’d like to hear from you.