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Member of Technical Staff - Software Engineer

Reflection

Salary not specified
Oct 7, 2025
San Francisco, CA, US • New York, NY, US
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Reflection's mission is to build open superintelligence and make it accessible to all. They are developing open weight models and need to build the core software systems and tools that power their research, training, and production environments.

Requirements

  • Strong software engineering background with experience shipping production-grade systems.
  • Experience designing APIs, services, or developer platforms that handle large-scale data or compute.
  • Comfortable navigating complex codebases, debugging hard problems, and optimizing for reliability and speed.

Responsibilities

  • Build the core software systems and tools that power our research, training, and production environments.
  • Design and implement reliable, scalable, and secure services to support model development, deployment, and evaluation.
  • Develop APIs, SDKs, and internal platforms that enable rapid experimentation and high-velocity iteration.
  • Drive engineering excellence and create the foundation for our next generation of AI models.
  • Provide the foundational layers that unify data, compute, and workflow management across model development.

Other

  • Thrive in a high-agency, fast-paced startup environment; bias toward action and impact.
  • Excited about zero to one challenges, building new systems rather than maintaining legacy ones.
  • Collaborative, clear communicator, and comfortable working across research and infra boundaries.
  • Motivated by creating the software backbone for the world’s most capable open-weight AI systems.
  • Top-tier compensation: Salary and equity structured to recognize and retain the best talent globally.