Staff Software Engineer - Apps ($280k–$380k + Equity) at Well-funded AI productivity startup

Jack & Jill; San Francisco (CA); On-site; USD 150,000 - 210,000; Full time

Benefits offered by this job

Equity

Job summary

Jack & Jill in San Francisco seeks an architect to design and maintain a cross-platform application stack spanning web, desktop, and mobile for a cloud agent OS. You will build complex real-time synchronization and optimize performance for native-feeling interfaces.

We value a proven track record shipping production-grade client applications across multiple platforms, strong distributed systems experience, and AI-assisted development workflows. Equity is part of the package.

Qualifications

• Proven track record shipping production-grade client applications across multiple platforms.
• Experience with distributed systems and local-first state management.
• Experience with AI-assisted development workflows.

Responsibilities

• Architect and maintain a cross-platform application stack across web, desktop, and mobile.
• Develop real-time synchronization systems and optimize performance.
• Deliver native-feeling interfaces with high quality.

Skills

Cross-platform Development

Real-time Sync Architecture

State Management

Distributed Systems

AI-assisted Development

Client Application Architecture

Performance Optimization

iOS Development

Android Development

Web Development

Desktop Development

Job description

Architect and maintain a cross-platform application stack across web, desktop, and mobile for a cloud agent OS. Develop complex real-time synchronization systems and optimize performance for high-quality, native-feeling interfaces.

Requirements:

Proven track record of shipping production-grade, high-performance client applications across multiple platforms. Extensive experience with distributed systems, local-first state management, and AI-assisted development workflows.

Key Skills:

• Cross-platform Development
• Real-time Sync Architecture
• State Management
• Distributed Systems
• AI-assisted Development
• Client Application Architecture
• Performance Optimization
• iOS Development
• Android Development
• Web Development
• Desktop Development

Benefits:

• Equity