Founding Full-Stack Engineer

Join Hire Hangar and work with fast-growing global companies while building a long-term career.
Job Title: Founding Full-Stack Engineer
Location | On-Site — San Francisco, CA
Time Zone | PST
Role Overview:
We are seeking a Founding Full-Stack Engineer to join the earliest technical team at a fast-moving AI video infrastructure startup. The company's first product turns prompts and documents into whiteboard-style explainer videos in seconds, with a broader vision to make video generation fast, cheap, and programmable enough for AI to use video anywhere it uses text today. This is a founding engineering hire responsible for shaping the core product across the entire stack, from user-facing features to backend systems. The ideal candidate thrives on ambiguity, moves fast, and takes real ownership of outcomes rather than waiting for a fully-scoped spec. You will work directly with the founder and help define how engineering operates from day one.
Key Responsibilities:
– Design and ship features spanning frontend, backend, and infrastructure
– Build APIs and workflows for accounts, projects, billing, and collaboration
– Create frontend experiences that are fast, intuitive, and reliable
– Improve onboarding, account visibility, and overall developer experience
– Collaborate closely with product, design, and customers to prioritize work
– Write clean, maintainable code and documentation for the team to build on
Required Qualifications:
– Strong full-stack engineering background with modern web applications
– Experience with typed languages, frontend frameworks, backend APIs, databases, and cloud services
– Solid product instincts and ability to simplify complex workflows for users
– Comfortable shipping quickly while maintaining reliability on critical paths
– Strong ownership mentality from problem definition through launch
– Comfortable using AI tools to move faster, while relying on personal judgment to define and solve problems
– Must be willing to work on-site in San Francisco, CA
Preferred Qualifications:
– Prior experience at an early-stage startup or founding engineering team
– Experience operating without a formal ticket queue or fully-defined spec
– Comfortable working across product, design, and infrastructure simultaneously
Tools & Technology:
– Modern frontend frameworks
– Backend/API frameworks and databases
– Cloud infrastructure and deployment tooling
– AI-assisted development tools
We connect top talent with vetted employers, competitive pay, and real growth opportunities.