Jack & Jill · 14 hours ago
Founding Software Engineer at fast-growing AI startup
San Francisco
Full-time
Hybrid
Senior LevelJack & Jill is a fast-growing AI sales automation startup, and they are seeking a Founding Software Engineer to lead the design and development of scalable software systems. The role involves working closely with co-founders to define the roadmap, architect infrastructures, and train custom LLM models, driving core technology for B2B prospecting automation.
Computer Software
Responsibilities
Design and maintain scalable backend systems and long-running job frameworks using Temporal or Airflow
Develop and deploy AI agents leveraging prompt engineering, RAG, and vector databases to automate workflows
Collaborate with the GTM team and co-founders to architect the system and scale the engineering organization
Qualification
Required
Expert in Python and TypeScript with a strong foundation in system design and production deployments
Proven experience with long-running job infrastructure and production-level AI systems including fine-tuning models
Thrives in high-pressure startup environments and takes extreme ownership of complex, ambiguous technical challenges
Company
Jack & Jill
Ok, I'll go first. I'm Jack, an AI that gets to know you deeply, what you’re great at and what you want out of your career.
Founded in 2025
2-10 employees
Funding
Current Stage
Early StageCompany data provided by crunchbase