Senior Fullstack Developer

San Francisco, CA | Full-time | Office

Our client is a rapidly scaling, venture-backed startup in San Francisco that’s redefining the way organizations approach hiring and interviews using conversational AI and advanced analytics. They're building a powerful platform used by both candidates and enterprise clients — transforming interviews into actionable data at scale.
We're now seeking a hands-on Full-Stack Software Engineer who thrives in fast-paced, product-led environments and is ready to take ownership of real-world problems across the entire stack.

What You'll Do
This role offers a chance to join an early team shaping the future of hiring tech. You'll collaborate directly with the founders and play a critical role in building scalable solutions for both the candidate-facing product and enterprise dashboard.

Key areas you’ll work on:
🔸 Candidate Experience (AI Interviewing Engine)

• Optimize real-time performance (aiming for sub-200ms response time)
• Fine-tune large language models to improve answer quality and reduce hallucinations
• Build architecture to support scale and concurrency

🔸 Enterprise Platform (Analytics & Integration)

• Integrate with external hiring systems (ATS, HRIS)
• Design and build fast, intuitive dashboards to present structured interview data
• Own and deliver new feature development from concept to deployment

Core Requirements:

• 5+ years of professional experience building full-stack applications

Strong with:

• React / Next.js / TypeScript
• Node.js, Python (FastAPI preferred)
• Azure, Docker, Kubernetes
• Experience building scalable systems and APIs
• Strong fundamentals in system architecture and backend design

Bonus Experience:

• UI implementation from Figma designs
• Experience with AI/LLM-based tools
• Prior work in early-stage startups
• Background in top-tier engineering teams or universities

This role is a great match if you:

• Have a builder’s mindset — hands-on, proactive, and focused on outcomes
• Enjoy solving ambiguous, complex technical problems
• Thrive in a fast-paced, startup environment where iteration and ownership are key
• Are curious, self-motivated, and ready to grow with a high-performing team

What’s on Offer

• Direct involvement in building a product with real-world impact
• Daily collaboration with visionary founders and senior leadership
• High growth potential in a breakout startup environment
• Competitive salary + equity
• Health insurance, unlimited PTO, and regular team events
• On-site in SF: full relocation support available (must be work-authorized in the US)