Backend Developer jobs in San Francisco hiring now at vetted startups and product companies on Alion, updated daily. Average salary around $272,233/year. Compare remote, hybrid and on-site positions with relocation and visa sponsorship. Browse and apply today.
anrok.com · HQ: San Francisco, United States · Accounting & Tax Software · 51-200 employees · Est. 2020 · Startup · Trust A · Hiring 14
HQ: San Francisco, United States · Accounting & Tax Software · 51-200 employees · Est. 2020 · Startup · Trust A · Hiring 14
Anrok is a financial software company that automates sales tax and VAT compliance for software and digital businesses. Its platform connects to billing and payment systems such as Stripe, monitors where a company has tax obligations, calculates tax on invoices and files and remits returns in jurisdictions around the world. The company is headquartered in San Francisco, California, United States.
HQ: Waterloo, Canada · Messaging Apps · 201-500 employees · Likely startup · Trust C · Hiring 27, 1 new
TextNow is a mobile app company offering free calling and texting to millions of users. Its product and engineering teams in San Francisco and Waterloo hire product designers, lifecycle marketers, data scientists and software developers working on AI features. The company is headquartered in Waterloo, Canada.
cloudzero.com · HQ: Boston, United States · Cloud Cost & Multi-Cloud Management · 201-500 employees · Est. 2016 · Startup · Trust A · Hiring 13, 1 new
HQ: Boston, United States · Cloud Cost & Multi-Cloud Management · 201-500 employees · Est. 2016 · Startup · Trust A · Hiring 13, 1 new
CloudZero is a cloud cost intelligence software company that helps engineering and finance teams measure and allocate cloud and AI spending. Its platform maps costs from AWS, other cloud providers and AI services to products, features and customers to calculate unit costs and return on investment. The company was founded in 2016 and is headquartered in Boston, Massachusetts, United States.
formal.com · HQ: San Francisco, United States · Cybersecurity AI · Network Security · Trust D · Hiring 10
HQ: San Francisco, United States · Cybersecurity AI · Network Security · Trust D · Hiring 10
Formal is a network security company building a platform that enforces controls on the actions and data of humans and AI agents. Its shared policy layer covers databases, infrastructure, APIs and AI tools, and customers include Cursor, Decagon and Notion. The company is headquartered in San Francisco, United States.
stackone.com · HQ: San Francisco, United States · Integration & API Management · AI Agents · 51-200 employees · Est. 2023 · Startup · Trust B · Hiring 4
HQ: San Francisco, United States · Integration & API Management · AI Agents · 51-200 employees · Est. 2023 · Startup · Trust B · Hiring 4
Give your AI agents access to 520+ apps with 32,000+ actions, or build custom integrations in hours. Managed infrastructure, security, and compliance included.
flexport.com · HQ: San Francisco, United States · Supply Chain & Logistics Software · Customs Brokerage · Freight Forwarding · Supply Chain · 1001-5000 employees · Est. 2013 · Trust B · Hiring 181, 6 new
HQ: San Francisco, United States · Supply Chain & Logistics Software · Customs Brokerage · Freight Forwarding · Supply Chain · 1001-5000 employees · Est. 2013 · Trust B · Hiring 181, 6 new
Flexport is a digital freight forwarder managing ocean, air and ground shipments. Its software gives shippers real-time visibility into containers, customs status and landed cost. The company combines a licensed brokerage with a technology platform.
backbone.ai · HQ: Nashville, United States · Medical AI · Revenue Cycle & Medical Billing · Likely startup · Trust B · Hiring 3
HQ: Nashville, United States · Medical AI · Revenue Cycle & Medical Billing · Likely startup · Trust B · Hiring 3
Backbone is a healthcare technology company building a clinical AI layer for healthcare payments so that care can be paid for at the moment it is delivered. It targets the administrative work of prior authorizations, denials and appeals and hires founding engineers for forward deployed, backend and applied research roles. The company is headquartered in Nashville, United States.
rpotential.ai · HQ: San Francisco, United States · Artificial Intelligence · 51-200 employees · Est. 2025 · Startup · Hiring 2
HQ: San Francisco, United States · Artificial Intelligence · 51-200 employees · Est. 2025 · Startup · Hiring 2
R.Potential is the decision system above workforce and AI tools. Decide which future organization to build, route execution through the right partners, and prove whether the change worked.
x.ai · HQ: Palo Alto, United States · AI Research Labs · Foundation Models · LLM & Generative AI · 1001-5000 employees · Est. 2023 · Trust B · Hiring 256, 20 new
HQ: Palo Alto, United States · AI Research Labs · Foundation Models · LLM & Generative AI · 1001-5000 employees · Est. 2023 · Trust B · Hiring 256, 20 new
xAI is an American artificial intelligence company founded by Elon Musk in 2023 with the stated goal of building models that help humans understand the universe. It develops the Grok family of large language models, distributes them through a consumer assistant, a developer API and deep integration with the X social platform, and adds image and video generation through Grok Imagine. The company runs its own Colossus supercomputer clusters in Memphis, Tennessee, is headquartered in Palo Alto, California, and merged with X Corp in 2025 to combine model development with a large consumer distribution channel.
convex.dev · HQ: San Francisco, United States · Databases & DBMS · Developer Tools · 11-50 employees · Startup · Trust D · Hiring 10
HQ: San Francisco, United States · Databases & DBMS · Developer Tools · 11-50 employees · Startup · Trust D · Hiring 10
Frontier AI agents built the same ten backends on Postgres and on Convex. On Postgres, almost every one silently corrupted data under load; on Convex the same code was correct by default.
macroscope.com · HQ: San Francisco, United States · AI Development Tools · Code Intelligence · 51-200 employees · Startup · Trust A · Hiring 9
HQ: San Francisco, United States · AI Development Tools · Code Intelligence · 51-200 employees · Startup · Trust A · Hiring 9
Merge PRs faster and fix bugs before they reach production. Macroscope provides AI-powered code review, automated PR descriptions, and real-time status updates for modern development teams.
livekit.com · HQ: San Francisco, United States · Conversational AI · Video Conferencing & Webinars · Developer Tools · 201-500 employees · Est. 2021 · Startup · Hiring 28, 3 new
HQ: San Francisco, United States · Conversational AI · Video Conferencing & Webinars · Developer Tools · 201-500 employees · Est. 2021 · Startup · Hiring 28, 3 new
LiveKit is a developer infrastructure company headquartered in San Francisco that provides an open source framework and cloud platform for building, deploying and scaling real-time voice, video and physical AI agents. Founded in 2021 as an open source WebRTC project for livestreaming and video conferencing, it powers voice AI applications for OpenAI, including ChatGPT Advanced Voice, as well as Salesforce, Spotify, Meta and thousands of other customers. It hires software, research and forward deployed engineers, product managers, developer advocates, designers and go-to-market staff in marketing, partnerships and finance.
codeintegrity.ai · HQ: Bothell, United States · Cybersecurity AI · Endpoint Security · 11-50 employees · Est. 2024 · Startup · Trust B · Hiring 5
HQ: Bothell, United States · Cybersecurity AI · Endpoint Security · 11-50 employees · Est. 2024 · Startup · Trust B · Hiring 5
Endpoint security inside the agent harness. CodeIntegrity sits inside the agent and stops the wrong action before it runs, on the device, with no cloud in the loop.
mainstaylabs.com · HQ: Tempe, United States · Real Estate AI · PropTech · 51-200 employees · Est. 2021 · Trust C · Hiring 11
HQ: Tempe, United States · Real Estate AI · PropTech · 51-200 employees · Est. 2021 · Trust C · Hiring 11
Mainstay is a market intelligence platform built for buying, managing and selling homes in the single family rental industry, which turns complex data into insights using AI. It was founded within Opendoor, launched as an independent company in 2024 and raised a Series A round led by Khosla Ventures. The company is headquartered in Tempe, Arizona, United States.
hedra.com · HQ: San Francisco, United States · Generative Audio & Music · Generative Image · Generative Video · 1001-5000 employees · Est. 2023 · Trust B · Hiring 8
HQ: San Francisco, United States · Generative Audio & Music · Generative Image · Generative Video · 1001-5000 employees · Est. 2023 · Trust B · Hiring 8
Create professional videos, images, and audio in one studio. Hedra gives you AI-powered tools to go from concept to production in minutes.
edo.com · HQ: New York, United States · Advertising · Media & Audience Measurement · 201-500 employees · Est. 2015 · Trust A · Hiring 5
HQ: New York, United States · Advertising · Media & Audience Measurement · 201-500 employees · Est. 2015 · Trust A · Hiring 5
EDO is a New York advertising measurement company founded in 2015 that links television advertising to online response. Its data shows which commercials drove search and engagement within minutes of airing, giving television an outcome metric. The company works with networks, studios and national advertisers.
