Fullstack Engineer / Typescript Backend

Title: Full Stack Software Engineer / TypeScript Backend

Location: San Francisco, CA

Salary: $220K-$290K + Equity

A rapidly growing SaaS AI startup in San Francisco is hiring a Full Stack Engineer using Typescript to help build and scale a customer-facing platform that transforms complex enterprise data into actionable software. This role is looking for an engineer who can think beyond implementation and who is product-focused and able to work 80% backend and 20% frontend for development. This is a startup environment where engineers take ownership, work closely with leadership and customers, and play a direct role in shaping the product.

This role is primarily backend-focused using Typescript, with some frontend work, and centers on building systems that handle can handle and understand large-scale, real-time data. You will develop and improve core product features, working across TypeScript, React, AWS/GCP, PostgreSQL, and any Python, Rust, Terraform is a plus. As an AI-first platform, experience with GenAI, LLMs, or agent based systems is a huge plus. This is a product-driven role, ideal for someone who is comfortable working with complex data, who enjoys solving ambiguous problems, and who can bridge the gap between technical systems and end-user value.

Experience:

• 3+ years of experience in full stack or product-focused software engineering
• Strong TypeScript experience building backend services (NestJS, or similar)
• Experience building customer-facing applications using modern frontend frameworks (React)
• Experience working with large, complex datasets and real-time systems
• Experience with GenAI either professionally or with personal projects
• Strong product mindset with the ability to translate technical systems into user-facing features
• Comfortable working in fast-moving startup environments and collaborating with customers

Benefits:

• Equity
• Paid Time Off
• Medical, dental, and vision insurance
• Great Onsite company culture with food stipends and flexible work schedule
• Opportunity to work closely with leadership and customers

Oscar Associates Limited (US) is acting as an Employment Agency in relation to this vacancy.