Fullstack Software Engineer x f

Responsibilities

• Build and evolve Hopper’s product experiences across web, Slack, Linear, and GitHub.
• Develop agent runtimes and orchestration, including control planes, harnesses, model routing, long-running execution, recovery, and isolated sandboxes.
• Create secure connectors and an MCP Gateway handling identity, credentials, permissions, confirmations, sensitivity, and audit.
• Develop reusable skills, automations, artifacts, dashboards, hosted tools, and evaluation experiences.
• Own projects end to end from React interactions and API contracts through production reliability.
• Help scale managed agent pools, sandboxed environments, autonomous testing, and CI auto-fix capabilities.

Requirements

• 3+ years of experience in full-stack software engineering roles.
• Experience building products, internal platforms, frameworks, or infrastructure used by other people.
• Depth in at least one relevant area such as AI agents and evaluations, developer platforms, high-quality product UX, distributed systems and runtimes, or security and authorization.
• Ability to own work end to end from a React interaction or API contract to production reliability.
• Experience with LLM APIs, agent harnesses, MCP, or AI-assisted coding tools is a strong plus.
• Fluency in English; French is not required.
• Ability to work legally in France, Belgium, or Spain.
• Curiosity, collaboration, product and platform thinking, and the ability to make tradeoffs across speed, reliability, cost, security, and user experience.

Benefits

• Remote work flexibility with an emphasis on in-person collaboration.
• Stimulating work environment with perks intended to support employee happiness and efficiency.
• Opportunity to work on Alan’s internal agentic AI platform and collaborate across engineering, product, data, sales, and operations.