Staff Platform Engineer, Infrastructure

📋 Job Overview

Every time someone talks to Flow, they're waiting — mid-sentence, cursor blinking — for their words to appear. 500ms feels like magic. 1000ms feels annoying. People use Flow hundreds of times a day, and they feel every single request. We're building the first voice interface a billion people use every day. Our first product, Flow, lets you talk instead of type anywhere on your computer or phone, and turns messy speech into polished text that is ready to send. It's scaled from $2M → $50M in ARR in under 12 months with millions of users and thousands of enterprise customers.

🏢 About Wispr

We're building the first voice interface a billion people use every day. Our first product, Flow, lets you talk instead of type anywhere on your computer or phone, and turns messy speech into polished text that is ready to send. It's scaled from $2M → $50M in ARR in under 12 months with millions of users and thousands of enterprise customers.

🎯 The Role

Every time someone talks to Flow, they're waiting — mid-sentence, cursor blinking — for their words to appear. 500ms feels like magic. 1000ms feels annoying. People use Flow hundreds of times a day, and they feel every single request. Why this is hard: we've scaled our user base faster than our infrastructure could keep up with. We build and deploy our own voice models, and we've tuned our networking stack to hit P50 latencies of 500ms around the globe. But latency is just the beginning. Our platform layer sits behind every personalization feature, the multi-step workflows that turn speech into action, and the primitive infrastructure the rest of the product is built on. We're shipping new surfaces fast, which means the core platform now needs far more rigor and a lot more headroom. We've built for millions of users and thousands of enterprises with a three-person platform team. You'd be on the ground floor, creating the systems that support the next hundred million.

✅ Key Responsibilities

• Build the seam between product and ML: credentials, proxy, routing, experimentation.
• See the next scaling bottleneck two quarters early and fix it before anyone notices it existed.
• Architect and own whole parts of the platform end to end.
• Make every product engineer faster — dev experience, deploy speed, abstractions.
• Help set technical direction as the team goes from three to eight.

📌 Required Qualifications

• You've rewritten an entire service because you realized the bugs were all coming from bad architecture.
• You've seen systems break, understood why, and now think twelve months ahead.
• You build the foundation patiently so that everything after it ships faster.
• You get excited about complex problems with lots of constraints and edge cases.
• You care as much about the user journey as the technical requirements.

🎁 Benefits

• Equity on employee-friendly terms, including extended exercise windows and a combination of ISOs and RSUs.
• Health, dental and vision. We cover 100% of the premium on the Anthem Blue Cross Gold PPO, and 75% of premiums for dependents. (US only)
• 401(k) with up to a 4% match. (US only)
• Flexible time off and company holidays.
• All meals in the office, plus commuter benefits and relocation reimbursement if you’re moving to San Francisco.
• A high-spec laptop, monitor, and a whisper-friendly microphone.
• Regular team events and off-sites.
• 16 weeks of paid parental leave (12 weeks for non-birthing parent).

🛂 Visa & Eligibility

• Visa sponsorship. We sponsor visas: H1B, O1, EB1, L1, STEM + OPT, and more. We can't successfully sponsor for every role and every candidate, but if we make you an offer we'll make every reasonable effort, and we retain an immigration law firm to help.