About Semgrep

Semgrep, the leader in code security for builders, empowers invention without friction. Teams catch, flag, and fix real issues before they ship, powered by security that learns as they build. Semgrep secures code as it’s written and provides guardrails that pave the road for developers to move fast and stay secure. Built for builders and trusted by security, Semgrep lives where developers work, delivering fixes without breaking flow, and giving security teams visibility, control, and confidence. Semgrep gets smarter as you build, with AI that learns your context to cut false positives and prioritize reachable vulnerabilities, validated by 95% of security reviewers across 6M+ findings. Semgrep makes zero false positives a reality with AppSec teams triaging 80% fewer false positives across Code and Supply Chain, dramatically shrinking the backlog.

Founded in San Francisco and backed by Menlo Ventures, Felicis Ventures, Lightspeed Venture Partners, Redpoint Ventures, and Sequoia Capital, Semgrep is recognized by Gartner in Application Security Testing and is trusted by leading organizations, including Vanta, Lyft, and Dropbox. Learn more at semgrep.dev.

About the role

As a software engineering intern at Semgrep, you’ll help us build a new category of developer-focused security tools to prevent bugs and security vulnerabilities. You will be joining the team behind the widely used Semgrep. You will get to ship features that make it easier for teams to integrate Semgrep into their existing workflows or build improvements that help our services scale and remain reliable.

Along the way, you will work with a dedicated group of full-stack developers, security researchers, program analysis experts, and infrastructure engineers. You will learn from senior developers who bring experience and wisdom from Google, Facebook, and successful startups. You will work with our clients’ security teams at companies ranging from early-stage startups to social-media giants. You will have opportunities to learn about their individual security philosophies and develop ways to make their lives easier. You’ll attend lunch and learn sessions across the company - learning about everything from advanced type systems to product paradigms. As a member of our engineering team, you will get to speak directly with real customers who are using the features you build – something that makes interning at an early-stage startup so unique! We’re excited to go on this journey with you!

Perhaps the best description of this internship comes from someone who has been where you will be.

Tanisha Kholiya experience as a 2026 intern

Solomon Graf experience as a 2026 intern

You will

Design and ship new features in a full-stack codebase using Python, PostgreSQL, Typescript, and React

Work with our users, product team, and design team to address user pain points

Query our aggregated metrics and run experiments to help understand and improve core Semgrep workflows

Collaborate with your team through code reviews, design discussions, and demos

Learn from a peer mentor whose job is to help you succeed, and to help you get what you want out of your internship

Present your work to the team at the end of your internship

You are ideal for this role if you

Have taken multiple college courses in computer science or equivalent experience

Are interested in making a career out of software or a related field

Have experience in a dynamic language like Python, Ruby, Javascript, or PHP

Are excited about software security and developer enablement

Are able to work in our San Francisco office 5 days/week.

Are you able to start on either Tuesday, May 25th, 2027 or Tuesday, June 8th, 2027

Example projects previous interns have worked on

Re-design and implement a frontend web page to be more intuitive and functional

Build a Slack App integration for Semgrep-app with an authentication handshake

Build seamless VSCode and IntelliJ Semgrep integrations

Implement SSO authentication only onboarding

Build a triage workflow using PR comments