Lambda
AI cloud infrastructure
SecurityEngineeringIntern-Summer2026
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“Security Engineering Intern - Summer 2026 at Lambda. Skills: Security Engineering, AI, LLM, Cloud Infrastructure. Shipping production security detections against Lambda's real log data.. Building LLM-powered classifiers and rule-based detections.”
What You'll Achieve.
Ship real production detections you develop against Lambda's real log data over the course of the summer, chosen with your mentor from a menu of high-value security gaps.; The detections you build will be the first line of warning when something looks wrong in our environment.
Industry & Context.
Ability to take a fuzzy problem ("we need to know when someone overshares a sensitive document") and turn it into a scoped, shippable piece of work without needing a ticket pre-written for you.; reasoning in writing
This position requires presence in our San Francisco office location 4 days per Lambda’s designated work from home day is currently Tuesday.
What They're Looking For.
Must Have
Currently enrolled in a Bachelor's or Master's program in Computer Science or a related field, returning to school after the summer., Independent technical projects you've shipped: side projects, open source contributions, hackathons, research code, anything where you scoped a problem and built a working solution., Fluency writing code in at least one general-purpose language (Go or Python preferred, but we care more about your ability to learn and leverage an LLM than your starting stack)., Comfort using frontier LLMs as a coding partner. You can tell when the model is wrong, push back on bad suggestions, and use it to accelerate learning rather than replace it., Ability to take a fuzzy problem ("we need to know when someone overshares a sensitive document") and turn it into a scoped, shippable piece of work without needing a ticket pre-written for you., Curiosity about how systems get attacked and defended, even if you've never formally studied security., written communication.
Nice to Have
Prior software engineering internship., Familiarity with cloud infrastructure (AWS, GCP, or similar), command-line environments, or systems-level programming., You’ve built something with AI assistance that pushed beyond what you could have done alone., Experience working with log data, structured event data, or building anything that processes streams of records., Prior exposure to security concepts (a CTF you played, a security class you took, a side project you built, a security mistake you made and learned from, etc. )., Coursework or projects involving machine learning, data classification, or applied AI.
What You'll Do.
Shipping production security detections against Lambda's real log data.
Building LLM-powered classifiers and rule-based detections.
Working closely with mentor in code reviews and threat hunting.
Documenting built work clearly.
Presenting work at the end of the summer.
How You'll Work.
Team & Collaboration
Work alongside a senior engineer mentor.; Work closely with your mentor in code reviews and threat hunting.; Present your work at the end of the summer to the security team and company leadership.
Communication Scope
written communication
Process & Methodology
Ability to take a fuzzy problem and turn it into a scoped, shippable piece of work without needing a ticket pre-written for you.
Full Job Description
Lambda, The Superintelligence Cloud, is a leader in AI cloud infrastructure serving tens of thousands of customers. Our customers range from AI researchers to enterprises and hyperscalers. Lambda's mission is to make compute as ubiquitous as electricity and give everyone the power of superintelligence. One person, one GPU. If you'd like to build the world's best AI cloud, join us. *Note: This position requires presence in our San Francisco office location 4 days per week; Lambda’s designated work from home day is currently Tuesday. About the Role Lambda Security protects some of the world's most valuable digital assets: invaluable training data, model weights representing immense computational investments, and the sensitive inputs required to leverage best of breed AI models. We're responsible for securing every byte that powers breakthrough artificial intelligence. As a Software Engineering Intern on the Security team, you'll spend the summer shipping production security detections against Lambda's real log data: code that fires on real events and routes to a real on-call team. This is not a sandbox project. The detections you build will be the first line of warning when something looks wrong in our environment. You'll work alongside a senior engineer mentor on code review, security concept training, and unblocking your work. Between those sessions, your primary partner is a frontier LLM: you'll use it to learn log schemas, reason through threat models, and accelerate your way through code you've never written before. We expect interns to drive their own learning and use AI tools fluently; the bar for what a great junior engineer can ship has changed, and this role is designed around that change. The work spans LLM-based classifiers for sensitive data exposure, identity and access pattern detection, and the security infrastructure that everything else depends on. You and your mentor will pick the specific projects together, prioritizing where the data is richest an
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