Software Engineer Intern (Summer 2026)

We’re looking for a Software Engineer Intern to join our team in San Mateo, CA for eight weeks this summer (June 19 - August 21).

As an intern we don’t expect you to have much experience, but you must demonstrate a track record of autonomy. When applying, please include a link to at least one public project on GitHub that you built (not a fork). This can be a hackathon project, side project, or something you just built for fun. The most important thing is that you’ve built a product end-to-end (ideally something has been used by people).

At StarSling we're focused on making all the annoying tasks outside of your code editor fully agentic starting with CI/CD. StarSling Runners are self-driving CI - fast GitHub Actions runners with AI agents that continuously analyze and ship optimization PRs. Customers like Mastra and Better Auth are getting 80% faster CI with StarSling.

We built the first working prototype of StarSling Runners in 48 hours, shipped to our first customer in one month and will help you learn how to move fast. By the end of your internship, customers will be using your project in production.

You'll be working directly with me (Daniel). Before StarSling, I was the Engineering Manager at Netflix working on the most used internal tool across all of Netflix’s 3K+ engineers and tens of thousands of microservices- an internal developer portal called Netflix Console. Earlier in my career I was an engineer on Facebook’s AI Camera team and helped build the mobile computer vision library that currently powers camera effects for 100M+ DAUs across IG, FB, and WhatsApp. I’m obsessed with helping every engineer be more productive.

You’ll also be working directly with my co-founder Yonas. Before StarSling, Yonas was the Founder & CEO of StackShare, a developer community used by over 40 million developers. He raised $12M as a first-time founder and did founder sales to get them to just under $1M ARR with their enterprise product before selling the company last year. He’s obsessed with creating product experiences that developers love and building community.

💻 What You’ll Own

Your internship will focus on delivering a single project end-to-end to customers. Here’s an idea of the types of projects that we work on:

• Agent Harness: Improve our close-loop optimization harness — MCP, tool use, memory, retry logic, context updates, feedback mechanisms.
• Headless Product Experience: Create agent-first product experiences (API, CLI and Markdown).
• Event-driven Dashboard: Design schemas, event flows and ingest dev tools webhooks to power a real-time personalized engineering portal.

✅ This IS for you if

• You’re a 0-to-1 builder who can unblock themself autonomously.
• You have a genuine curiosity about agentic products and are excited about understanding how to create effective closed-loop agents.
• You’re unusually obsessed with hard problems. Your current skills or even what you've done before is less important than your ability to go all-in and accomplish anything that you set your mind to.
• You’re comfortable with ambiguity and adapting to dynamic priorities. You need to have good judgement to know when to let little fires burn and when to immediately jump in.
• You have excellent communication and candor. You’ll be communicating directly with engineers and collaborating with us on key decisions.
• You have grit and perseverance. You should be accustomed to picking between hard options and pushing through it.

❌ This IS NOT for you if

• You’re not based in The Bay Area (we’ll be a team of four if you join so we’ll be sitting next to each other everyday)
• You’re not available for the internship. June 19 - August 21, 2026
• You’re not willing to work six days per week (we take Sundays off)
• You’re not using codegen tools like Claude Code, Cursor, etc.
• You’re not comfortable deleting 80%-90% of the code that you write.
• You’re not comfortable with ambiguity and rapid context-switching.
• You don’t like candor- receiving and giving direct, honest feedback.
• You need a well defined structure or spec for every task.

🌍 The Opportunity

• Work alongside two experienced co-founders - one who built and sold a dev tools startup and one who led the engineering effort to create the same product we’re creating at scale
• Get experience across the startup stack - you’ll be doing customer support, bug squashing, user interviews, and everything else along with writing code
• Hands-on experience at the next dev tools category leader - we’re not just building a dev tool, we’re building an engineering platform that every company in Silicon Valley will be using and paying for