Member of Engineering (Agent Harness)

ABOUT POOLSIDE

In this decade, the world will create Artificial General Intelligence. There will only be a small number of companies who will achieve this. Their ability to stack advantages and pull ahead will define the winners. These companies will move faster than anyone else. They will attract the world's most capable talent. They will be on the forefront of applied research, engineering, infrastructure and deployment at scale. They will continue to scale their training to larger & more capable models. They will be given the right to raise large amounts of capital along their journey to enable this. They will create powerful economic engines. They will obsess over the success of their users and customers.

Poolside exists to be this company: to build a world where AI will be the engine behind economically valuable work and scientific progress. We believe the fastest way to reach AGI lies in accelerating software development itself, by reshaping the developer experience with agentic systems, coding assistants, and the frontier models that power them. We deploy these systems directly into the development environments of security-conscious enterprises.

ABOUT OUR TEAM

We were founded in the US and have our home there, but our team is distributed across Europe and North America. We get our fix of in-person collaboration (and croissants) in Paris each month for 3 days, always Monday-Wednesday, with an open invitation to stay the whole week. We also do longer off-sites once a year.

Our team is a multidisciplinary blend of research, engineering, and business experts. What unites us is our deep care for what we build together. We’re in a race that requires hard work, intellectual curiosity, and obsession; to balance this intensity, we’ve assembled a team of low ego and kind-hearted individuals who have built the special culture Poolside has. By building collaboratively and with intention, we create a compounding effect that moves the entire company forward towards our mission: reaching AGI through intelligence systems built for software development.

ABOUT THE ROLE

You’ll join our Applied Research Engineering group to help build poolside’s coding agents. Your work will center on building the core agent framework, the supporting tools, and the orchestration environment needed to run coding agents securely, reliably, and at scale. You can view Poolside's coding agent repo here.

We’re looking for strong software engineers with a passion for building reliable, high-performance systems. Experience (or strong interest) in AI coding agents is a significant plus.

In this role, you’ll collaborate closely with our product engineering and research teams to continuously build and improve our platform for coding agents.

YOUR MISSION

Help us design and deliver the most capable AI agents for software engineering tasks, pushing the boundaries of what AI agents can do.

RESPONSIBILITIES

• Design, build, and maintain the core framework for poolside’s coding agents

• Develop scalable, secure, and isolated runtime environments to run agents in complex enterprise environments

• Collaborate with research and product teams to prototype, develop, and evaluate new agent capabilities

• Continuously improve the performance, reliability, and developer experience of our platform

SKILLS & EXPERIENCE

• Demonstrated agent harness engineering experience, especially in a professional setting focused on coding agents

• Strong programming skills, especially in Go and Python, as much of our codebase is in these languages. We are open to polyglot engineers from other languages (C++, C, Rust, etc.)

• Plus: Experience in large scale, distributed data systems

• Plus: Familiarity with container runtimes, microVMs, or sandboxing systems

PROCESS

• Intro call with a member of our team

• Technical Interview(s) with a member of our engineering team

• Team fit call with the People team

• Final interview with one of our Founding engineers

BENEFITS

• Fully remote work & flexible hours

• 37 days/year of vacation & holidays

• 16 weeks of flexible, full-pay parental leave

• Health insurance allowance for you & dependents

• Company-provided equipment

• Well-being, always-be-learning & home office allowances

• Frequent team get togethers

• Diverse & inclusive people-first culture