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Member of Engineering (Agent Sandboxes)

Backend Developer • Remote • Full-time • 📍 Remote (EMEA/East Coast)

Join Poolside's Platform Engineering team to build the sandboxed agent execution environment that powers evaluation and training teams at scale, running hundreds of thousands to millions of environments.

Responsibilities

  • Design and develop a sandboxed execution environment to facilitate agent research and product development
  • Own the complete development cycle of new features and capabilities in the agent execution environment
  • Collaborate with other teams to discuss, guide and meet their needs in the sandbox and code execution environment
  • Continuously improve reliability and performance of the agent execution environment

Requirements

  • Strong programming skills, especially in Go, Python, or other systems programming languages
  • Comfortable with distributed systems
  • Experience with Kubernetes or similar container/VM orchestration systems
  • Familiarity with public clouds like AWS, GCP, etc.
  • Hands-on experience with sandbox techniques and container runtimes

Soft skills

Ability to balance speed and qualitySelf-driven and proactiveWillingness to reprioritize work based on evolving project needsAbility to distinguish between high-impact tasks and trivial optimizations

About the company

Poolside is building toward Artificial General Intelligence by accelerating software development itself, reshaping the developer experience with agentic systems, coding assistants, and the frontier models that power them. The team is distributed across Europe and North America, with monthly 3-day in-person gatherings in Paris and longer annual off-sites.

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