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.
getarch.com • San Francisco • Digital Marketing • HVAC & Refrigeration • 51-200 employees • Est. 2011 • Trust B • Hiring 6
San Francisco • Digital Marketing • HVAC & Refrigeration • 51-200 employees • Est. 2011 • Trust B • Hiring 6
Arch is AI-powered marketing software for HVAC, plumbing, and electrical contractors. Prevent churn, discover high-intent leads, and automate campaigns from ServiceTitan data.
≈ $156k – $290k per year (Estimated) • Equity • Senior • 5+ years exp • In office (San Francisco, United States) • Master's Degree • Full-Time • Senior
n1.xyz • HQ: New York, United States • Blockchain Infrastructure • Startup • Trust C • Hiring 10, 1 new
HQ: New York, United States • Blockchain Infrastructure • Startup • Trust C • Hiring 10, 1 new
N1 is a blockchain network designed to enable trustless computing and onchain finance at internet scale. It is backed by institutions including Founders Fund and Kraken Ventures, and hires Rust backend engineers and growth staff. The company is headquartered in New York, United States.
folio.co • HQ: Durham, United States • Travel Technology • 51-200 employees • Est. 2025 • Startup • Trust B • Hiring 5
HQ: Durham, United States • Travel Technology • 51-200 employees • Est. 2025 • Startup • Trust B • Hiring 5
Procure-to-pay.. Supercharge your team—from rooms to restaurant. No training required. Folio is the easiest way to order, manage bills, and pay suppliers all in one place.
dreamhq.com • HQ: San Francisco, United States • Generative 3D • Multimodal AI • 1-10 employees • Trust B • Hiring 5
HQ: San Francisco, United States • Generative 3D • Multimodal AI • 1-10 employees • Trust B • Hiring 5
Dream is building the first spatial intelligence model that natively reasons about the built world — structured, relational, and physically grounded, not just rendered pixels.
comfy.org • HQ: San Francisco, United States • AI Development Tools • Generative Video • Generative Image • Est. 2024 • Startup • Hiring 4, 1 new
HQ: San Francisco, United States • AI Development Tools • Generative Video • Generative Image • Est. 2024 • Startup • Hiring 4, 1 new
Comfy Org is an artificial intelligence software company headquartered in San Francisco, California, and founded in 2024. The company stewards ComfyUI, an open source node based interface for building generative image and video pipelines that gives users direct control over models, samplers, and conditioning steps. It employs the project's original author, maintains the node registry and desktop application, and is widely used by artists, studios, and researchers running diffusion models locally.
tavrn.ai • HQ: San Francisco, United States • Legal AI • 51-200 employees • Startup • Trust B • Hiring 6
HQ: San Francisco, United States • Legal AI • 51-200 employees • Startup • Trust B • Hiring 6
Tavrn is a legal AI company that provides AI-powered demand letters, medical chronologies and medical record retrieval for plaintiff attorneys in personal injury, medical malpractice, workers compensation and disability practices. It hires AI product engineers, sales development staff and customer success managers. The company is headquartered in San Francisco, California, United States.
stytch.com • HQ: San Francisco, United States • Fraud Detection • Identity Management • 51-200 employees • Est. 2020 • Trust B • Hiring 5
HQ: San Francisco, United States • Fraud Detection • Identity Management • 51-200 employees • Est. 2020 • Trust B • Hiring 5
Stytch is a software company providing authentication and fraud prevention infrastructure for developers. Its APIs cover passwordless login, single sign-on, device fingerprinting and bot detection, and it hires solutions engineers, product designers and backend engineers. The company is headquartered in San Francisco, California, United States.
cluely.com • HQ: San Francisco, United States • Machine Learning • Custom Software Development • 51-200 employees • Est. 2025 • Startup • Trust B • Hiring 3
HQ: San Francisco, United States • Machine Learning • Custom Software Development • 51-200 employees • Est. 2025 • Startup • Trust B • Hiring 3
Cluely builds a real time desktop assistant that listens to meetings and screens. Its overlay suggests answers during live conversations. The company became widely discussed for its provocative marketing.
onyx.app • HQ: San Francisco, United States • AI Agents • AI Search • Vector Search & RAG • Trust B • Hiring 4
HQ: San Francisco, United States • AI Agents • AI Search • Vector Search & RAG • Trust B • Hiring 4
Onyx is a software company that provides an open source generative artificial intelligence chat interface that connects to organizational documents, applications, and internal knowledge. Its platform is designed to let teams build and deploy AI assistants and natural language interfaces integrated with existing tools and data sources.
inngest.com • HQ: San Francisco, United States • Workflow & Process Automation (RPA, BPM) • Developer Tools • 51-200 employees • Est. 2021 • Startup • Hiring 1
HQ: San Francisco, United States • Workflow & Process Automation (RPA, BPM) • Developer Tools • 51-200 employees • Est. 2021 • Startup • Hiring 1
Inngest gives developers durable execution for background jobs, workflows and AI pipelines without running queue infrastructure. Functions are written in normal application code and the platform handles retries, concurrency limits and step state. It is used heavily by teams building long-running agent workflows.
layerfi.com • HQ: San Francisco, United States • Accounting & Tax Software • Financial Software & Embedded Finance • 1-10 employees • Likely startup • Trust B • Hiring 6, 1 new
HQ: San Francisco, United States • Accounting & Tax Software • Financial Software & Embedded Finance • 1-10 employees • Likely startup • Trust B • Hiring 6, 1 new
Layer helps software companies launch accounting to their SMB customers. Increase engagement, drive revenue, and become the financial home for your SMBs.
transluce.org • HQ: San Francisco, United States • Nonprofits & Foundations • 11-50 employees • Est. 2024 • Trust C • Hiring 11
HQ: San Francisco, United States • Nonprofits & Foundations • 11-50 employees • Est. 2024 • Trust C • Hiring 11
Transluce is a non-profit research laboratory building open tools that make the behaviour of artificial intelligence systems observable and auditable. Its work includes automated interpretability agents that describe what neurons and features represent, and investigator systems that surface unexpected model behaviours at scale. The laboratory publishes its tooling openly so that external researchers and auditors can examine deployed models; its founders previously led research and engineering teams at frontier laboratories.
