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Founding Full Stack Software Engineer

mLabs

$150,000 - $250,000
Oct 6, 2025
Santa Monica, CA, US
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Our client is building fully autonomous AI agents that can find, exploit, and patch complex vulnerabilities in web applications at massive scale, moving at the speed of AI-generated code. As a Founding Full-Stack Software Engineer (with a strong focus on backend and AI), you will be crucial in designing and developing their core agent systems and scalable web applications.

Requirements

  • Strong proficiency in Python and deep understanding of AI, particularly LLMs and Agentic AI Architectures.
  • Expertise in API Design and building scalable, micro-service based backend systems.
  • Experience post-training and serving LLM models, or experience in Cybersecurity/web vulnerabilities.

Responsibilities

  • Design and develop modular, reusable, and maintainable features primarily using Python.
  • Design and create RESTful APIs in Python specifically to power AI Agents.
  • Build Agentic AI systems and custom tools/protocols for cybersecurity applications.
  • Design efficient PostgreSQL database systems and optimize backend services for performance and scalability.
  • Build and maintain backend systems using technologies like Docker and Kubernetes, and diagnose/optimize code bottlenecks.

Other

  • 1-4 years of experience as a full-stack software engineer at a notable company (e.g., big tech, YC startup).
  • Sponsorship available (H1B transfers and new visas).
  • 5 days/week in-person