Backend Developer jobs in San Francisco hiring now at vetted startups and product companies on Alion, updated daily. Average salary around $276,456/year. Compare remote, hybrid and on-site positions with relocation and visa sponsorship. Browse and apply today.
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.
layerfi.com · HQ: San Francisco, United States · Accounting & Tax Software · Financial Software & Embedded Finance · 1-10 employees · Likely startup · Trust B · Hiring 6
HQ: San Francisco, United States · Accounting & Tax Software · Financial Software & Embedded Finance · 1-10 employees · Likely startup · Trust B · Hiring 6
Layer helps software companies launch accounting to their SMB customers. Increase engagement, drive revenue, and become the financial home for your SMBs.
omi.me · HQ: San Francisco, United States · Smartwatches & Fitness Trackers · Multimodal AI · Likely startup · Trust B · Hiring 6
HQ: San Francisco, United States · Smartwatches & Fitness Trackers · Multimodal AI · Likely startup · Trust B · Hiring 6
Omi is a startup building an AI wearable device and app that records conversations as memory and offers a voice-first interface for everyday life. It has reached 300,000 software users, built three hardware devices and hires founding engineers, firmware, PCB and mechanical engineers in San Francisco and Shenzhen. The company is headquartered in San Francisco, California.
transluce.org · HQ: San Francisco, United States · Nonprofits & Foundations · 11-50 employees · Est. 2024 · Trust C · Hiring 10
HQ: San Francisco, United States · Nonprofits & Foundations · 11-50 employees · Est. 2024 · Trust C · Hiring 10
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.
you.com · HQ: Palo Alto, United States · AI Search · 201-500 employees · Est. 2020 · Startup · Trust B · Hiring 9, 1 new
HQ: Palo Alto, United States · AI Search · 201-500 employees · Est. 2020 · Startup · Trust B · Hiring 9, 1 new
You.com builds AI search and research infrastructure for developers and enterprises, having moved away from its original consumer search engine. It offers Web Search, Contents, Answer, Research and Finance Research APIs, an MCP server and the ARI research agent, and its platform routes each task across multiple data sources and models. Founded in 2020 in Palo Alto by former Salesforce researchers Richard Socher and Bryan McCann, it handles more than a billion queries a month for customers such as DuckDuckGo, Windsurf and Harvey and raised a $100 million Series C led by Cox Enterprises in 2025.
kapwing.com · HQ: San Francisco, United States · Content Creation · Generative Video · Photo & Video Editing Software · 11-50 employees · Est. 2018 · Startup · Hiring 1
HQ: San Francisco, United States · Content Creation · Generative Video · Photo & Video Editing Software · 11-50 employees · Est. 2018 · Startup · Hiring 1
Generate full video projects from a single prompt using Kapwing. Join over 30 million modern creators who trust Kapwing to create, edit, and grow their content on every channel.
ansa.io · HQ: San Francisco, United States · IT Consulting & Digital Transformation · Custom Software Development · 51-200 employees · Est. 2022 · Likely startup · Trust B · Hiring 5
HQ: San Francisco, United States · IT Consulting & Digital Transformation · Custom Software Development · 51-200 employees · Est. 2022 · Likely startup · Trust B · Hiring 5
ANSA ANTONISHEN PRESS ABOUT TLDR I've worked in the tech industry for 14+ years as a researcher,designer, and leader. Now I lead design and research teams forathenahealth.
createdbyhumans.ai · HQ: San Francisco, United States · Data Marketplaces, Sharing & Clean Rooms · AI Training Data & Annotation · Startup · Trust B · Hiring 3
HQ: San Francisco, United States · Data Marketplaces, Sharing & Clean Rooms · AI Training Data & Annotation · Startup · Trust B · Hiring 3
Created by Humans is a licensing platform that lets authors and creators license copyrighted works to AI developers for training and reference uses. It is led by a team with a background in digital publishing, technology and data infrastructure, and hires engineers and partnerships staff. The company is headquartered in San Francisco, California, United States.
getcasa.com · HQ: San Francisco, United States · Kitchens, Bathrooms & Home Improvement · Local Services Marketplaces · Startup · Trust C · Hiring 19
HQ: San Francisco, United States · Kitchens, Bathrooms & Home Improvement · Local Services Marketplaces · Startup · Trust C · Hiring 19
Casa is a home services company building autonomous home care that combines a digital understanding of each home with skilled people to service it, founded by some of Uber's earliest employees. Its postings cover residential handymen in San Francisco, Berkeley, San Jose and San Mateo and an operations manager in Austin. The company is headquartered in San Francisco, California, United States.
ranger.net · HQ: San Francisco, United States · AI Development Tools · Software Testing & QA · 1-10 employees · Startup · Hiring 2
HQ: San Francisco, United States · AI Development Tools · Software Testing & QA · 1-10 employees · Startup · Hiring 2
Ranger builds quality assurance tools that let teams and AI agents verify work as fast as agents write it, so software ships quickly without losing quality. Customers such as Fanatics, Amplitude and Clay use it to close the gap between what agents build and what works in production. The company is headquartered in San Francisco, United States.
spellbrush.com · HQ: San Francisco, United States · Game Development · Generative Image · Est. 2018 · Startup · Trust D · Hiring 11, 1 new
HQ: San Francisco, United States · Game Development · Generative Image · Est. 2018 · Startup · Trust D · Hiring 11, 1 new
Spellbrush builds generative models for anime art and the games made with them, including the illustration tool used by its community. Its research focuses on stylised character generation rather than photorealism. The studio ships its own titles alongside the underlying model work.
≈ $125k – $245k per year (Estimated) · Middle · 3+ years exp · In office (San Francisco, United States, Tokyo, Japan) · Full-Time · Middle · Japanese: C1
avela.com · San Francisco · Boston · Texas · Houston · Supply Chain · Wholesale · Est. 2012 · Trust B · Hiring 8
San Francisco · Boston · Texas · Houston · Supply Chain · Wholesale · Est. 2012 · Trust B · Hiring 8
Avela Corporation is an American global sourcing company that helps businesses source products and streamline their supply chains. It offers sourcing and supply chain efficiency services to companies seeking lower costs and better return on investment. The company is based in the United States.
