Senior / Staff Backend Software Engineer (Remote) Seattle, WA | San Francisco, CA | New York, NY

Location: Fully remote within the greater Seattle, San Francisco Bay Area, or New York City metros. MFull-time position with benefits: Not Contact*Visa Sponsorship or Transfers are not available. The CompanyAI-powered fraud prevention platform. They sit at the center of how the digital economy decides who to trust. Their platform processes identity decisions in real time for thousands of enterprise customers, including the majority of the largest banks and financial institutions in the US, stopping fraud before it starts and verifying legitimate users instantly, at massive scale.They're well-funded, pre-IPO, and at roughly 500 people, they're scaling toward 700 by end of year. Why This Role ExistsThey're building out their engineering org across multiple teams and need backend engineers who've built things that had to scale, stay up under pressure, and perform under load, every time, without exception.This is not a maintenance role. You would own components end-to-end, designing, building, testing, and shipping on systems that power real-time identity decisions for millions of people daily.What You'll Work OnDesign and build scalable distributed systems operating at high throughput and low latencyOwn non-functional requirements including reliability, availability, performance, and securityArchitect and develop microservices and APIs that are part of core platform infrastructureDrive engineering decisions and contribute to elevating standards across the teamCollaborate cross-functionally in a fast-moving, agile environmentMentor engineers and contribute to a culture of technical ownership and excellenceWhat They're Looking ForSenior Level5-7 years of hands-on backend engineering experienceDeep experience building scalable, distributed systemsStrong fundamentals in concurrency, performance optimization, and reliabilityMicroservices and RESTful API experienceSelf-directed and comfortable operating with ambiguityStaff Level (same foundation, plus)8-12 years of experienceDemonstrated end-to-end architectural ownership, not just contributionCan articulate system design decisions, tradeoffs, and reasoning clearlyTrack record of connecting engineering work to measurable business outcomesExperience driving technical direction across a team or workstreamLanguagesGo/Golang is a differentiator, as new initiatives are targeting GoJava, Python, Scala, Rust, and C++ are all acceptablePure .NET/C# backgrounds are not a fit for this roleStrong Plus, Both LevelsStartup or high-growth SaaS experienceFintech, identity, fraud prevention, or security domain backgroundEngineers who actively use AI in their day-to-day workflowsHigh-throughput, low-latency storage and data infrastructure experienceWhat Sets This ApartReal distributed systems problems at serious scale, not toy problemsA company that's already won the market and is still building hard thingsHigh ownership culture where your fingerprints stay on what you buildStrong comp: Senior range $180K-$220K base | Staff range $225K-$250K base, both with equity and bonusClear path to grow, as strong Senior engineers get seen and move fast here