MLabs
Founding Full Stack Software Engineer
MLabsUnited States6 hours ago
Full-timeOther
Founding Full Stack Software Engineer (Backend/AI Focus)

Location: Los Angeles, CA, US (On-site)

Employment Type: Full-time

Salary Range: $160K - $225K

We are a rapidly growing, Y-Combinator-backed (YC X25) startup operating at the intersection of AI and Cybersecurity. We are building fully autonomous, in-house AI agent systems designed to solve critical, large-scale problems in modern web application security. Join a small, high-impact founding team to define and build the core technology from the ground up.

We are seeking a skilled and passionate Founding Full Stack Software Engineer with a strong focus on backend development and AI systems. You will be responsible for designing, developing, and maintaining highly scalable, high-performance web applications and our cutting-edge AI Agent platform.

Key Responsibilities:

  • Design and develop modular, reusable, and maintainable features primarily using Python
  • Build and maintain complex features with a strong focus on system performance and scalability
  • Design and create robust RESTful APIs in Python to power our proprietary AI Agents
  • Implement and optimize systems for Agentic AI in the domain of large-scale threat detection and mitigation
  • Analyze and identify performance bottlenecks in the backend codebase, implementing efficient optimization solutions
  • Work with database systems, ensuring efficiency and scalability using PostgreSQL
  • Utilize and build backend infrastructure components using technologies like Docker and Kubernetes
  • Contribute to creating custom Agentic tools, protocols, and foundational systems

Requirements

  • Experience: 1 - 5 years of experience as a software engineer at a notable company (e.g., big tech, YC startup)
  • Education: Bachelor's or Master's degree in Computer Science or a related technical field
  • Core Proficiency: Strong knowledge and deep understanding of Python, API Design, and efficient Database systems
  • AI Expertise: Deep understanding of AI Agents, LLMs, and relevant AI libraries. Experience designing and creating complex Agentic AI Architectures
  • Backend Architecture: Strong understanding of building scalable, micro-services and distributed systems with efficient design patterns
  • Development Tools: Strong experience with version control using Git and Git-based workflows
  • Productivity: Experience leveraging AI development tools (e.g., Cursor) to significantly improve development speed and quality
  • Collaboration: Strong communication and collaboration skills for working effectively in a cross-functional team environment

Nice to Have:

  • Experience with the post-training and serving of LLM models
  • Understanding of web vulnerabilities, cybersecurity principles, or experience working with security tools (Not required, but beneficial)

Benefits

  • Competitive annual salary ($160K - $225K) and significant early-stage equity (0.25% - 0.6%)
  • Opportunity to join a YC-backed company at the founding stage and directly influence the product and engineering culture
  • Work with a modern and powerful tech stack including Next.js, Python, React, and PostgreSQL
  • Relocation support is available for candidates moving to the Santa Monica, Los Angeles area

Due to the high volume of applications we anticipate, we regret that we are unable to provide individual feedback to all candidates. If you do not hear back from us within 4 weeks of your application, please assume that you have not been successful on this occasion. We genuinely appreciate your interest and wish you the best in your job search.

Commitment to Equality and Accessibility:

At MLabs, we are committed to offer equal opportunities to all candidates. We ensure no discrimination, accessible job adverts, and providing information in accessible formats. Our goal is to foster a diverse, inclusive workplace with equal opportunities for all. If you need any reasonable adjustments during any part of the hiring process or you would like to see the job-advert in an accessible format please let us know at the earliest opportunity by emailing [email protected].

MLabs Ltd collects and processes the personal information you provide such as your contact details, work history, resume, and other relevant data for recruitment purposes only. This information is managed securely in accordance with MLabs Ltd's Privacy Policy and Information Security Policy, and in compliance with applicable data protection laws. Your data may be shared only with clients and trusted partners where necessary for recruitment purposes. You may request the deletion of your data or withdraw your consent at any time by contacting [email protected].

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