{"schemaVersion":"jobsearcher.job.v1","id":"b22956cbfe39c2977d58deb9","url":"https://jobsearcher.com/jobs/b22956cbfe39c2977d58deb9","canonicalUrl":"https://jobsearcher.com/jobs/b22956cbfe39c2977d58deb9","title":"Senior Backend Software Engineer (Python / FastAPI) Software","description":"Senior Backend Software Engineer (Python / FastAPI)Build and own the real-time backend powering radar-to-operator decisionsLocation: San Francisco, California\r\nCompensation: $140,000 - 240,000 USD / year\r\nAbout The RoleSenior Backend Software Engineer (Python / FastAPI)Build the real-time backend that turns radar sensor data into decisions people can act on.\r\nCHAOS Industries is a defense tech company founded in 2022 that has raised $1B from investors including 8VC, Accel and Valor Equity Partners. You'll own the backend services and data pipelines that move sensor data from radars in the field to the operators who depend on it.\r\nWhat You'll DoBuild high-performance Python services that ingest, process and distribute real-time sensor data with low latency, high reliability and security at scale\r\nBuild high-performance Python (FastAPI) services that ingest, process and distribute real-time data securely at scale\r\nOwn streaming, storage and replay of detections, tracks and telemetry for live and playback 3D geospatial views\r\nBuild the decision layer that coordinates a growing fleet of sensors as field conditions change\r\nShape platform architecture for new capabilities, scale and long-term maintainability\r\nYou're A Fit If You HaveStrong production experience building backend services in Python (FastAPI or similar)\r\nBuilt real-time or streaming data systems: message queues, WebSockets, time-series data\r\nOwned a production system end to end: designed it, shipped it, fixed it when it broke\r\nReal leverage from AI coding tools, with a considered view on what to delegate and what not to\r\nBased in, or willing to relocate to, the San Francisco Bay Area (this role is on-site)\r\nNice To HaveGeospatial or 3D data visualization in TypeScript and React\r\nEdge computing, or moving data reliably over constrained or unreliable networks\r\nAzure or another major cloud platform\r\nHardware, sensors, robotics, telemetry or defense systems\r\nWhat You GetMedical, dental and vision, 100% paid by the company\r\n401k with 50% company match up to 6% of pay, plus FSA, HSA and life insurance\r\nPre-IPO stock options, relocation assistance, and annual bonuses (coming soon)\r\nUnlimited PTO and a casual dress code\r\nFree daily lunch while you're working on-site, plus a fully stocked kitchen\r\nPay range shown is base salary only and excludes equity, bonuses and benefits. Actual offers vary based on experience, skills and business needs.\r\nMust be a U.S. Person as defined under U.S. export control regulations, as required for access to controlled technology, and able to obtain and maintain a U.S. security clearance.#J-18808-Ljbffr","company":"Frontdoor Defense","rawCompany":"frontdoor defense","city":"Millbrae","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-11-13T01:37:27.899Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1254.00","title":"Web Developers","slug":"web-developers"}],"industries":[{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Senior Backend Software Engineer (Python / FastAPI) Software","description":"Senior Backend Software Engineer (Python / FastAPI)Build and own the real-time backend powering radar-to-operator decisionsLocation: San Francisco, California\r\nCompensation: $140,000 - 240,000 USD / year\r\nAbout The RoleSenior Backend Software Engineer (Python / FastAPI)Build the real-time backend that turns radar sensor data into decisions people can act on.\r\nCHAOS Industries is a defense tech company founded in 2022 that has raised $1B from investors including 8VC, Accel and Valor Equity Partners. You'll own the backend services and data pipelines that move sensor data from radars in the field to the operators who depend on it.\r\nWhat You'll DoBuild high-performance Python services that ingest, process and distribute real-time sensor data with low latency, high reliability and security at scale\r\nBuild high-performance Python (FastAPI) services that ingest, process and distribute real-time data securely at scale\r\nOwn streaming, storage and replay of detections, tracks and telemetry for live and playback 3D geospatial views\r\nBuild the decision layer that coordinates a growing fleet of sensors as field conditions change\r\nShape platform architecture for new capabilities, scale and long-term maintainability\r\nYou're A Fit If You HaveStrong production experience building backend services in Python (FastAPI or similar)\r\nBuilt real-time or streaming data systems: message queues, WebSockets, time-series data\r\nOwned a production system end to end: designed it, shipped it, fixed it when it broke\r\nReal leverage from AI coding tools, with a considered view on what to delegate and what not to\r\nBased in, or willing to relocate to, the San Francisco Bay Area (this role is on-site)\r\nNice To HaveGeospatial or 3D data visualization in TypeScript and React\r\nEdge computing, or moving data reliably over constrained or unreliable networks\r\nAzure or another major cloud platform\r\nHardware, sensors, robotics, telemetry or defense systems\r\nWhat You GetMedical, dental and vision, 100% paid by the company\r\n401k with 50% company match up to 6% of pay, plus FSA, HSA and life insurance\r\nPre-IPO stock options, relocation assistance, and annual bonuses (coming soon)\r\nUnlimited PTO and a casual dress code\r\nFree daily lunch while you're working on-site, plus a fully stocked kitchen\r\nPay range shown is base salary only and excludes equity, bonuses and benefits. Actual offers vary based on experience, skills and business needs.\r\nMust be a U.S. Person as defined under U.S. export control regulations, as required for access to controlled technology, and able to obtain and maintain a U.S. security clearance.#J-18808-Ljbffr","datePosted":"2026-11-13T01:37:27.899Z","dateModified":"2026-11-13T01:37:27.899Z","hiringOrganization":{"@type":"Organization","name":"Frontdoor Defense","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Millbrae","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"b22956cbfe39c2977d58deb9"},"url":"https://jobsearcher.com/jobs/b22956cbfe39c2977d58deb9"}}