Principal Engineer: AI-Driven Full-Stack Tech Lead

Matrix Usa Inc; United States; On-site; USD 180,000 - 250,000; Full time

Job summary

Matrix Usa Inc. is seeking a Principal Engineer to join as the CTO’s technical deputy, driving day-to-day engineering execution and architectural direction.

You will lead full-stack development, guide AI-agent-enabled practices, review code, and ensure delivery momentum across cloud, databases, and frontend services. The role emphasizes hands-on leadership with strong architectural judgment, balancing practical execution with engineering excellence.

Qualifications

• 10+ years of software engineering experience at senior levels.
• Hands-on full-stack capability across databases, backend, frontend, and cloud.
• Fluency with AI coding agents in development and debugging.
• Ability to establish AI-assisted engineering practices without compromising quality.

Responsibilities

• Provide hands-on technical leadership and CTO liaison.
• Own routine engineering decisions and guide implementation.
• Review code, unblock developers, and maintain delivery momentum.
• Lead AI-agent-assisted development standards and guardrails.
• Ensure maintainability, reliability, and observability across systems.
• Collaborate with CTO, platform architect, product, and researchers.

Skills

Hands-on leadership

Full-stack engineering

AI-agent development

Code reviews

Technical decision making

Education

Bachelor's degree in Computer Science or Engineering

Job description

Matrix Usa Inc. is seeking a Principal Engineer to join as the CTO’s technical deputy, driving day-to-day engineering execution and architectural direction.

You will lead full-stack development, guide AI-agent-enabled practices, review code, and ensure delivery momentum across cloud, databases, and frontend services. The role emphasizes hands-on leadership with strong architectural judgment, balancing practical execution with engineering excellence.