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.
wefunder.com · HQ: Cambridge, United States · Crowdfunding & P2P Lending · 51-200 employees · Est. 2012 · Startup · Hiring 7
HQ: Cambridge, United States · Crowdfunding & P2P Lending · 51-200 employees · Est. 2012 · Startup · Hiring 7
Wefunder is a public benefit corporation that runs an investment crowdfunding platform helping founders raise money, from ostrich farms to companies such as Substack, Replit and Mercury. Its stated goal is to help 20,000 more founders get started, and it hires sales, operations, design and customer success staff. The company is headquartered in Cambridge, Massachusetts, United States.
svix.com · HQ: New York, United States · Custom Software Development · Integration & API Management · 51-200 employees · Est. 2021 · Startup · Hiring 3
HQ: New York, United States · Custom Software Development · Integration & API Management · 51-200 employees · Est. 2021 · Startup · Hiring 3
Svix is the enterprise-ready webhook platform delivering billions of webhooks every month for fast-growth startups and Fortune 500 companies including Brex, Benchling, and Drata. Send and receive webhooks at scale with retries, signature verification, and a managed dashboard.
granica.ai · HQ: Mountain View, United States · AI Compute & Inference · Cloud Cost & Multi-Cloud Management · MLOps · 51-200 employees · Est. 2019 · Startup · Trust A · Hiring 9
HQ: Mountain View, United States · AI Compute & Inference · Cloud Cost & Multi-Cloud Management · MLOps · 51-200 employees · Est. 2019 · Startup · Trust A · Hiring 9
Granica is an AI infrastructure software company that reduces storage, compute and data costs for large-scale AI and analytics workloads. Its platform compresses and optimizes data in cloud data lakes and runs inside customers' own AWS and Google Cloud environments. Founded in 2019, the company is headquartered in Mountain View, California, United States, with an engineering team in Bengaluru, India.
getbluejay.ai · HQ: San Francisco, United States · AI Evaluation & Observability · 51-200 employees · Est. 2025 · Startup · Hiring 8
HQ: San Francisco, United States · AI Evaluation & Observability · 51-200 employees · Est. 2025 · Startup · Hiring 8
Bluejay is the QA platform for AI agents. Rigorously test your voice agents—before and after deployment. Simulate edge cases, catch regressions, ensure security, and benchmark performance. Stop vibe testing. Quality is engineered.
namespace.so · HQ: San Francisco, United States · Developer Tools · 201-500 employees · Est. 2022 · Startup · Trust B · Hiring 12
HQ: San Francisco, United States · Developer Tools · 201-500 employees · Est. 2022 · Startup · Trust B · Hiring 12
Namespace accelerates the development workflow of fast-moving software engineering teams. Best-in-class compute and development-supporting services that lead to 2x-10x faster builds, tests, and more.
reflection.ai · HQ: New York, United States · AI Research Labs · Foundation Models · 501-1000 employees · Est. 2024 · Startup · Trust A · Hiring 45, 3 new
HQ: New York, United States · AI Research Labs · Foundation Models · 501-1000 employees · Est. 2024 · Startup · Trust A · Hiring 45, 3 new
Reflection AI is a company founded in 2024 by former Google DeepMind researchers who worked on AlphaGo and large language models. It builds autonomous coding agents and has committed to releasing frontier open-weight models as an American counterweight to Chinese open model releases. The company raised a very large round in 2025 to fund training at frontier scale.
≈ $171k – $342k per year (Estimated) · Equity · Lead · 8+ years exp · In office (San Francisco, New York, United States, London, United Kingdom) · Full-Time · Staff
sim.ai · HQ: San Francisco, United States · Developer Tools · AI Agents · 51-200 employees · Est. 2025 · Startup · Hiring 3
HQ: San Francisco, United States · Developer Tools · AI Agents · 51-200 employees · Est. 2025 · Startup · Hiring 3
Sim is an open-source AI workspace where companies build, distribute and govern AI agents for enterprise systems. It offers many integrations, support for major language models, permission groups, spend limits and self-hosting, and hires engineers and go-to-market staff. The company is headquartered in San Francisco, California, United States.
≈ $170k – $340k per year (Estimated) · Lead · 8+ years exp · In office (San Francisco, United States) · Bachelor's Degree · Full-Time · GMP / cleanroom · Principal
pharos.sg · San Francisco · Digital Marketing · Graphic Design · Est. 2014 · Hiring 2
San Francisco · Digital Marketing · Graphic Design · Est. 2014 · Hiring 2
About Us Who We Are Pharos Art Pte Ltd is an Interior Design and Renovation company in Singapore, founded in 2014.Backed by years of experience, we continue to strive to meet our customers' needs and expectations.
variance.com · HQ: San Francisco, United States · Fraud Detection · RegTech, AML & Compliance · AI Agents · 51-200 employees · Startup · Trust B · Hiring 9
HQ: San Francisco, United States · Fraud Detection · RegTech, AML & Compliance · AI Agents · 51-200 employees · Startup · Trust B · Hiring 9
Variance is an artificial intelligence company that builds AI agents for investigative and review work in risk, compliance and trust and safety operations. Its agents handle level one to level three reviews with consistency, auditability and traceability, replacing manual case work for operations teams. The company is headquartered in San Francisco, California, United States.
lightsource.ai · HQ: San Francisco, United States · AI Agents · Procurement & Spend Management · 51-200 employees · Est. 2021 · Startup · Hiring 5
HQ: San Francisco, United States · AI Agents · Procurement & Spend Management · 51-200 employees · Est. 2021 · Startup · Hiring 5
LightSource is sourcing software for procurement teams that runs quotations, supplier comparison and award decisions in one place. It replaces the spreadsheets and email threads that manufacturers still use to buy direct materials. The product includes analytics on cost drivers and supplier performance.
strix.ai · HQ: New York, United States · Cybersecurity AI · Penetration Testing · 51-200 employees · Est. 2025 · Startup · Hiring 6
HQ: New York, United States · Cybersecurity AI · Penetration Testing · 51-200 employees · Est. 2025 · Startup · Hiring 6
AI penetration testing and autonomous security platform that tests your code, APIs, cloud, and infrastructure — and delivers validated findings with fix PRs. Start for free.
luminai.com · HQ: San Francisco, United States · Workflow & Process Automation (RPA, BPM) · 51-200 employees · Est. 2020 · Startup · Trust A · Hiring 15, 1 new
HQ: San Francisco, United States · Workflow & Process Automation (RPA, BPM) · 51-200 employees · Est. 2020 · Startup · Trust A · Hiring 15, 1 new
Luminai automates the repetitive manual steps inside business processes without replacing the systems underneath them. It records how staff move between applications and then performs those sequences on their behalf. Insurance, healthcare and government customers use it where integration projects would take years.
hebbia.com · HQ: New York, United States · Financial AI · Document AI · AI Search · 11-50 employees · Est. 2020 · Startup · Trust C · Hiring 23
HQ: New York, United States · Financial AI · Document AI · AI Search · 11-50 employees · Est. 2020 · Startup · Trust C · Hiring 23
Hebbia is an artificial intelligence company that develops Neural Matrix, an AI-powered enterprise search and intelligence platform designed for complex knowledge work. Founded in 2020, the platform enables professionals in finance, law, and corporate strategy to analyze massive volumes of unstructured documents, spreadsheets, and data instantly. By acting as an intelligent co-pilot for information retrieval and synthesis, it helps organizations make faster, data-driven decisions.
