About the role
We are looking for a Founding Software Engineer with 2+ years of experience to help build agentic AI that understands, reasons about and rebuilds the COBOL and mainframe systems running about 75% of the Fortune 500. You're a generalist with strong technical and product taste who has built production AI and data systems. You'll work directly with the CTO and have real ownership over architecture, product direction and engineering culture.
What will you be doing?
- Designing, prototyping and shipping AI-driven features end to end, from model interaction to user-facing workflows
- Building production-grade agentic systems that combine program analysis and knowledge extraction to modernize legacy codebases
- Re-architecting high-QPS data pipelines and core AI and data infrastructure
- Leading architecture decisions and setting early standards for testing, reliability and code quality with the CTO
- Working with subject matter experts and enterprise customers in banking, insurance, airlines and other industries
Key Requirements
- Founding engineer experience at an applied AI lab, with a background at Cognition
- Experience building and maintaining production-grade agentic or autonomous systems
- Strong background in data and AI systems, including high-QPS data pipeline re-architecture
- 2+ years of software engineering experience (bootcamp or self-taught is fine)
- Able to work fully on-site in San Francisco (relocation support available) with valid US work authorization (OPT and H1B transfers supported)
About Hypercubic
Hypercubic is an AI-native company focused on mainframe and COBOL modernization. The world's most important industries, including finance, government, energy, insurance, manufacturing, airlines and retail, still depend on mainframe systems built in the 1970s and 80s. These systems run about 75% of the Fortune 500. Hypercubic builds domain-specific, agentic AI that can understand, reason about and rebuild these large legacy applications. Its work combines program analysis, knowledge extraction and agentic systems. The company is backed by top investors and already works with some of the largest organizations in the world. So far, its enterprise pipeline has come from founder-led sales, and demand from upper-enterprise buyers such as banks is strong. Large contracts are worth six to seven figures and usually start as pilots before becoming paid deployments. Hypercubic is led by founder and CEO Sai Gurrapu, an engineer by background. It is a small, highly technical team of about seven based in San Francisco. The team works in person, moves fast and values ownership, high agency and zero-to-one building.
Required skills
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Job details
Salary
$150,000 - $300,000
Equity
0.5% - 2%
Location
San Francisco, United States
Experience
2+ years
Funding
Total raised
$500K
Last stage
Pre-seed
Investors
What happens next.
No applications, no recruiter spam. Just the intro.
Confirm the fit
A few questions to make sure this role is the right shape for you. Two minutes.
I pitch you to the company
I write the intro, send it to the founder, and handle the back-and-forth.
A meeting lands on your calendar
If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.