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410 startups and scale-ups in San Francisco are hiring software engineers right now, with 1,799 live roles between them, 440 of them opened in the last 30 days. Pick the ones you want and Haystack's AI agent fills in each employer's application for you.

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84% of candidates get an interview within 14 days568,056 candidatesRated 4.8/5 on G2
San Francisco · Software engineersLive roles today
  • ANAnthropic logo
    AnthropicScale-up · 201-500 staff130 roles
  • HAHarvey logo
    HarveyScale-up40 roles
  • CLClera logo
    CleraStartup · Office-first36 roles
  • PEPerplexity logo
    PerplexityStartup · 51-200 staff34 roles
  • BABaseten logo
    BasetenStartup · Under 50 staff33 roles
  • ASAstranis logo
    AstranisScale-up · 201-500 staff32 roles

and 404 more companies on the list

410 companies hiring now

Ranked by live roles (backend, full-stack, frontend, mobile, DevOps, security and QA engineers, and engineering managers). Every company is a startup or scale-up; recruitment agencies are left out. Press Auto apply on any role and Haystack's AI agent fills in that employer's form for you.

The top 40 of 410 companies, most live roles first.

  1. ANAnthropic logo

    Anthropic

    Scale-up201-500 staffTechnology & Software

    130roles30 opened this month

    Anthropic is an AI research company dedicated to developing safe, reliable, and steerable AI systems for humanity's long-term well-being.

    Replied to 50% of the applications Haystack's agent sentAll 130 roles at Anthropic

  2. HAHarvey logo

    Harvey

    Scale-up

    40roles12 opened this month

    Harvey builds AI-powered solutions for legal professionals to boost efficiency and accuracy and help shape the future of professional services.

    All 40 roles at Harvey

  3. CLClera logo

    Clera

    StartupOffice-first

    36roles14 opened this month

    Clera is an AI-powered talent platform that connects candidates with startups by matching people with roles and arranging introductions to hiring teams.

    Replied to 60% of the applications Haystack's agent sentAll 36 roles at Clera

  4. PEPerplexity logo

    Perplexity

    Startup51-200 staffTechnology & Software

    34roles10 opened this month

    Perplexity aims to revolutionise how people access and understand information online using an AI-powered conversational search engine.

    All 34 roles at Perplexity

  5. BABaseten logo

    Baseten

    StartupUnder 50 staffTechnology & Software

    33roles11 opened this month

    Baseten provides an inference cloud platform for developers to build and deploy high-performance machine learning applications and AI models.

    All 33 roles at Baseten

  6. ASAstranis logo

    Astranis

    Scale-up201-500 staffAerospaceOffice-first

    32roles6 opened this month

    Astranis builds and operates small, low-cost geostationary satellites to provide affordable and accessible internet access and critical services to remote areas and various customers.

    All 32 roles at Astranis

  7. DADatabricks logo

    Databricks

    Scale-up10,000+ staffTechnology & SoftwareHybrid

    31roles2 opened this month

    Databricks empowers customers to solve data problems by providing a unified data and AI platform that supports analytical and operational workloads.

    Replied to 75% of the applications Haystack's agent sentAll 31 roles at Databricks

  8. MEMercor logo

    Mercor

    Scale-up201-500 staffRemote-first

    29roles

    Mercor organises human intelligence to power the AI economy.

    All 29 roles at Mercor

  9. SAScale AI logo

    Scale AI

    Scale-up1,001-5,000 staffAI

    21roles4 opened this month

    To develop reliable AI systems for the world's most important decisions.

    Replied to 57% of the applications Haystack's agent sentAll 21 roles at Scale AI

  10. DEDecagon logo

    Decagon

    Scale-upOffice-first

    21roles3 opened this month

    Decagon builds and scales AI agents to power personalised customer experiences for enterprises.

    All 21 roles at Decagon

  11. CUCursor logo

    Cursor

    Startup201-500 staffHybrid

    21roles1 opened this month

    Cursor aims to automate coding and transform software development through an AI-powered code editor.

    All 21 roles at Cursor

  12. FLFluidstack logo

    Fluidstack

    Scale-upUnder 50 staffTechnology & SoftwareRemote-first

    20roles8 opened this month

    Fluidstack builds compute infrastructure for AI to safeguard democratic values and expand human freedom.

    All 20 roles at Fluidstack

  13. SESentry logo

    Sentry

    Scale-up51-200 staffRemote-first

    19roles7 opened this month

    Sentry helps developers find and fix bugs and performance issues in their code with an open-source error tracking platform.

    All 19 roles at Sentry

  14. MEMercury logo

    Mercury

    Scale-upRemote-first

    18roles8 opened this month

    Mercury provides banking and card services for startups and growing businesses, aiming to simplify financial lives through an easy and safe banking experience.

    All 18 roles at Mercury

  15. ALAltruist logo

    Altruist

    Scale-up201-500 staffFinancial ServicesOffice-first

    17roles2 opened this month

    Altruist aims to make independent financial advice better, more affordable, and accessible to everyone.

    All 17 roles at Altruist

  16. NRNimble Robotics logo

    Nimble Robotics

    Scale-up201-500 staffTechnology & Software

    17roles1 opened this month

    Nimble Robotics develops AI-powered robots to automate order fulfilment in warehouses, aiming to improve efficiency and throughput for logistics and e-commerce operations.

    All 17 roles at Nimble Robotics

  17. AIAirapps logo

    Airapps

    Scale-up

    16roles

    Air Apps builds reliable, AI-powered mobile applications to simplify daily life and enhance productivity for millions of users worldwide.

    All 16 roles at Airapps

  18. BRBrex logo

    Brex

    Scale-up1,001-5,000 staffFinancial ServicesHybrid

    15roles3 opened this month

    Brex provides a modern financial stack to empower growing businesses, simplifying operations and accelerating growth with integrated financial tools.

    All 15 roles at Brex

  19. WFWispr Flow logo

    Wispr Flow

    StartupHybrid

    15roles3 opened this month

    To build the voice interface for computing that helps people think faster, work smarter, and communicate effortlessly.

    All 15 roles at Wispr Flow

  20. SCSigma Computing logo

    Sigma Computing

    Scale-up201-500 staffTechnology & SoftwareRemote-first

    15roles1 opened this month

    Sigma Computing aims to transform organisations and humanity through data by enabling faster business intelligence and data science insights with its cloud-native platform.

    All 15 roles at Sigma Computing

Every startup has its own application form.

Applying to ten of these companies means ten careers sites and ten forms, each asking the same things in a different order. Haystack's AI agent fills them in from your CV and your answers, and asks you when a question needs you.

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Ashby application · Software EngineerApplying as Sarah · example
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Sarah Okonkwo
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Sarah_Okonkwo_Resume.pdf · tailored to this role
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No
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Application sent. 0 fields typed by Sarah. The reply lands in her Haystack inbox.
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Interviews landed at leading employers

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The agent applies. You interview.

84%get an interview within 14 days

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12form fields answered

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sarah.okonkwo@myapplications.to
Reddit
Interview: Customer Success Manager
Now
Thu, Oct 30 · 2:00–2:45 PM · Google Meet
AcceptedMaybeDecline
Added to your calendar
Figma
Thanks for applying to Figma
Tue
Notion
We've received your application
Mon

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Which startups are hiring software engineers in San Francisco?

As of October 2026, 410 startups and scale-ups in San Francisco are hiring software engineers, with 1,799 live roles between them. The most are at Anthropic, Harvey, Clera, Perplexity, Baseten. The full list on this page is rebuilt every day from the employers' own careers sites.

Which small companies (under 50 staff) are hiring software engineers in San Francisco?

Of the companies on this list, Baseten, Fluidstack, Nooks have fewer than 50 staff on record. Use the "Under 50 staff" filter above the list to see only them. Team sizes come from company records and are not known for every company, so other small teams may be on the list too.

How is this list made?

Haystack reads the careers sites of more than 30,000 employers every day. This list takes the live roles in San Francisco for backend, full-stack, frontend, mobile, DevOps, security and QA engineers, and engineering managers at companies recorded as startups or scale-ups, leaves out recruitment agencies, and ranks the companies by how many of those roles they have open.

Can I apply to all of these at once?

Not in one click, and you wouldn't want to. With Haystack Auto Apply you upload your resume once and pick the roles you want; Haystack's AI agent then fills in and submits each employer's own application form, asks you when a question needs your answer, and every reply lands in your Haystack inbox. Nothing is sent without your say-so.

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