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Full Stack Software Engineer Intern Summer 2026

San Francisco,...
S

SubImage

Startup
Category
Technical
Experience
0-3 years
Type
Internship
Location
San Francisco, CA, US
Job Description
Benefits & Culture
Work with founders
Open source contributions
Core Values
Security
Learning
Open Source
Innovation
This goes straight to the founder
Share on: TwitterFacebookLinkedInHacker NewsReddit

No recruiters. Founders reply directly.

Founder Signals
Response Rate
85%
Avg Response Time
2 hours
Compensation Calculator
In startups, higher salary usually means lower equity.
Salary (affects equity %)
Link salary ↔ equity
$125,000
$6,000$200,000
Equity % (auto from trade-off model)
0.77%
0%5%
Projected Exit Value
$350,000,000
$10M$500M
Live Trade-off
Salary
Equity %
Est. Equity Value at Exit
$100,000
0.86%
$1,505,902
$125,000
0.77%
$1,352,552
$150,000
0.69%
$1,199,201
$175,000
0.60%
$1,045,851

Advanced Salary & Equity Calculator

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About the role

We’re looking for hackers - not just in the YC “I went to a hackathon once” sense, but also in the “I break into shit” sense. At SubImage, we map out customer environments so that they can see misconfigurations and attack paths and fix them before they get hacked. Think about us as The Marauder’s Map from Harry Potter, but for cloud security. If you’re a self-starter who loves learning about how things work one level deeper, you’ll enjoy this internship, and we’ll love your perspective on how to improve our product. We’re YC-backed, open source-rooted, and small enough that you’ll work directly with the founders.

You might work on:

  1. Security research: find scary cloud vulns, highlight them using our product, blog/make videos about it
  2. Building and scaling data ingestion pipelines
  3. Developing AI agents for natural language search
  4. Modeling complex access relationships in graph databases
  5. A modern infra stack with Terraform and containers
  6. Finding ways to better present security insights in our next.js frontend
  7. Tech debt for days (jk)

You’ll like this if you:

  1. Want to build real tools that serious companies use
  2. Love learning about security, infra, or LLMs
  3. Want a public-facing portfolio of open source contributions We’re a small team based in downtown San Francisco and this internship is fully in-person. PS. If you read this thread and act on its advice, you will probably be ahead of 95% of applicants to this posting.