Senior/Staff Software Engineer

Reporting to the CTO. Locations: Marina del Rey, CA or Williamsburg, NY (onsite Monday–Friday).

About Flip

Flip builds AI voice agents that handle millions of real customer conversations for some of the biggest brands, healthcare providers, and transportation companies in the world. When you call a company and the AI actually solves your problem—tracks the order, processes the return, refills the prescription—that’s us. We’re a low-ego team focused on solving really hard problems at scale. Outside the frontier labs, almost nobody is running AI in production at this volume. We are—millions of live phone calls handled by an engineering team a fraction of the size you’d expect.

How we think

From day one, we’ve operated on first principles, starting with the customer. If you have strong conviction that something delivers real business value, you ship it—fast and often—because the customer is what matters. We removed the committee because conviction plus customer obsession doesn’t need a permission slip.

Agentic development has changed how we work, but it hasn’t negated the necessity of experience. Speed without judgment risks breaking systems millions depend on. That’s why we hire senior and staff engineers: builders whose experience makes the new speed safe. We care less about stack experience or corporate pedigree and more about whether you’ve looked past the noise and want to build product you’re genuinely proud of.

We keep the team lean on purpose—a high bar, real support, real resources—because that’s where builders truly express themselves. The most common feedback from engineers after joining Flip is some version of “I could never have done this at my last company.” Deep industry expertise matched with ruthless execution creates wonderful work.

What you'll build

We’re serving an orchestrated system of agents answering millions of contacts daily and expanding into other modalities like chat. Voice is unforgiving: real-time, no retries, and the customer is literally on the line. The work breaks into three lanes:

• Vertical engineering: Building the agents themselves—complex multi-step customer workflows and deep integrations into contact centers and industries like order systems, healthcare workflows, and logistics. “Mostly works” isn’t shippable here.
• Platform engineering: The orchestration layer every agent runs on—routing, state, tool use, and primitives that let vertical teams ship fast without reinventing the engine.
• Inference & DevOps: We host our own models; low-latency serving at production scale is a core competency. This includes telephony, observability, and deployment infrastructure that keeps millions of live calls healthy.

Our engineers do everything from sitting face-to-face with customers to diving deep into complex backend systems. You’ll pick where you fit, and it’ll likely evolve as we grow.

What we look for

• Real production experience: You’ve built and owned systems where failure had consequences. We don’t count years—we look at what you’ve shipped and what you learned.
• Judgment that survives contact with production: Agentic development is how we work, but we’re hiring your experience—knowing what to ship, what to slow down on, and what never to ship.
• Low ego, high execution: You own outcomes, not tickets. You’d rather ship the thing than present the plan for it.
• Customer obsession: You want to be close to the problem—sometimes literally in the room—and measure yourself by what the customer got.

More about us

• International team spanning the US, UK, and Canada.
• Raised +$30M to date, including a recent $20M Series A backed by Ridge, Next Coast, ScOp, Bullpen Capital, Data Point, Forum Ventures, and founders/executives from Amazon Alexa, Ada, Attentive, and Simon Data.
• Tech stack: Python, MongoDB, AWS, Twilio, Datadog, Snowflake, and Omni.

Benefits

• Comprehensive healthcare.
• Unlimited vacation, including a mandatory half-week off over July 4 and a full week off at the end of the year.
• Eligible for equity, subject to company policy and board approval.

Pay

Compensation range: $200,000–$400,000 USD, varying based on location, experience, and qualifications.

Schedule

In the office 5 days per week (Monday–Friday).