Senior Backend Engineer (Ruby), Plan: Spec-Driven Development

What You’ll Do:

• Lead backend features from early product discussions through technical design, implementation, rollout, and post-launch learning.
• Build the flows, APIs, and data models behind agent-generated work items, implementation plans, and mergeable code.
• Develop evaluation and benchmarking systems that measure workflow quality, token cost, and success rate.

What You’ll Bring:

• Strong Ruby on Rails experience in a large production codebase and production experience with Python.
• Experience driving substantial projects with several engineers over multiple months, with clear user or business outcomes.
• A product mindset and experience owning features end to end, including shaping scope, making trade-offs, and engaging with users.

About the Team:

• A small, distributed team of four engineers across Canada and Europe, working in an all-remote, async-first environment.
• Early-stage work with broad ownership, space for creativity, and a fast pace.
• Collaboration with design partners toward a public beta, with weekly sync calls, retrospectives, and demos.