Software Engineer Intern

About the role

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 http://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 https://github.com/returntocorp/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 https://www.linkedin.com/pulse/my-experience-interning-semgrep-tanisha-kholiya-t3uac/ as a 2026 intern

- Solomon Graf experience https://www.linkedin.com/pulse/going-dataflow-my-summer-semgrep-solomon-graf-cg2he/ as a 2026 intern

You will

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