About the job Senior/Staff Software Engineer
Job Description: Senior/Staff Software Engineer
Company: Extend
Location: On-site in NYC
Salary: $165k - $200k
Equity: 0.5% - 2%
Experience Required: 5-9 years in engineering, building products in a fast-paced startup environment
About Extend
Extend is at the forefront of building the next-generation document processing cloud. The platform enables technical and product teams to transform unstructured data (documents, PDFs, emails, images) into actionable insights, operational efficiencies, and innovative product initiatives. Extends solutions power mission-critical data processing for companies like Brex, Opendoor, Checkr, and Vendr.
Role Overview
As a Senior/Staff Software Engineer, you will:
- Build and maintain durable, scalable systems capable of processing tens of millions of data points monthly.
- Develop state-of-the-art accuracy for document processing and deploy custom automation flows.
- Own and lead projects as a core member of the founding team.
- Design human AI interfaces to optimize document automation.
- Collaborate directly with the CEO, CTO, and founding team members to shape the engineering culture and team dynamics.
Key Responsibilities
- Solve complex technical challenges, such as:
- Handling novel edge cases in customer data.
- Designing systems that self-correct and improve over time.
- Enabling enterprises to deploy AI with confidence.
- Balancing trade-offs between latency, cost, and performance.
- Ensure real-time processing of large data streams with reliability and efficiency.
- Build tools that empower non-technical domain experts to train AI agents with their expertise and business logic.
Tech Stack
- Languages & Frameworks: TypeScript, NodeJS, React
- Databases & Caching: Postgres, Redis
Employee Benefits
- 100% company-paid health insurance
- Unlimited PTO with mandatory minimums
- Complimentary office meals (lunch, dinner, coffee, snacks)
- Fully covered work-related expenses
Interview Process
- Initial phone screen
- Technical coding assessment
- Onsite interviews
Join a small, tight-knit team of six engineers backed by prominent investors, including angels from OpenAI, Brex, and Airbnb.
For more information, visit www.extend.app.