Join to apply for the Founding Software Engineer (Full-Stack) role at StarSling (YC X25)
We’re looking for a Founding Software Engineer (Full-Stack) to join our team in the San Francisco Bay Area. We're focused on solving a big problem: how to make all the annoying tasks outside of your code editor fully agentic; everything from deployment to performance, incidents, and bugs.
You'll be working directly with me (Daniel). Before StarSling, I was the Engineering Manager at Netflix working on the most used internal tool for their 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.
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.
What You’ll Own
- Event-driven backend: Architect our Node.js / Next.js / TypeScript and Supabase stack.
- LLM Agentic Workflows: Build a system of agents — MCP, tool use, memory, retry logic, context updates, feedback mechanisms.
- Agent Experience (AX): Create intuitive product interfaces for human-agent interactions.
- System Design & Technical Strategy: Work directly with me to determine the best technical path that balances moving fast and scaling to many customers using different dev tools.
This IS for you if
- You’re a full-stack 0-to-1 builder who has shipped to production.
- You have a genuine curiosity about agentic product experiences and are excited about understanding the impact of AI on engineering users.
- You’re a previous founder or founding engineer.
- You’re unusually obsessed with hard problems.
- You’re comfortable with ambiguity and adapting to dynamic priorities.
- You have excellent communication and candor.
- You care about helping swamped engineers fight through the schlep of software development.
- You have grit and perseverance.
This IS NOT for you if
- You’re not based in The Bay Area.
- You’re not willing to work six days per week.
- You’re not excited about using codegen tools like Cursor, Windsurf, Claude Code, 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 career ladder.
The Opportunity
- Work alongside two experienced co-founders.
- Get experience across the startup stack.
- Be the first employee of the next dev tools category leader.
Base pay range
$150,000.00/yr - $190,000.00/yr
Seniority level
Mid-Senior level
Employment type
Full-time
Job function
Engineering and Information Technology
StarSling is an equal opportunities employer and welcomes applications from all qualified candidates.
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