Senior Software Engineer - Collaborative Web Platform

Pantheon is a company that powers over 300,000 websites globally, providing a WebOps platform for developers and marketers. They are seeking a Senior Software Engineer to join their founding-stage product team, focusing on building a real-time, collaborative web content platform and owning significant pieces of the platform end-to-end.

Responsibilities:

• Own significant features and platform components end-to-end — from technical design through production delivery
• Build backend services, APIs, and frontend systems that power a real-time collaborative content platform
• Contribute meaningfully to architectural decisions — your opinion matters and will be sought
• Write clean, well-tested code and help establish quality standards for the team — there is no dedicated QA on this team
• Mentor and support SE II engineers through code review, pairing, and technical guidance
• Collaborate with product and design to translate ambiguous requirements into concrete technical plans
• Integrate AI tooling concretely into your development workflow and into the product
• Help define how the team works — process, standards, and engineering culture are all being built right now

Requirements:

• 5–8 years of professional software engineering experience
• Genuine full-stack capability — you have shipped production systems on both backend (APIs, cloud infrastructure, data services) and frontend (component systems, browser performance, interactive UIs)
• Strong API design experience: REST, GraphQL, and webhooks — with opinions about when to use each
• Cloud-native fluency: you have designed and operated services in GCP, AWS, or Azure, not just deployed to them
• Experience with real-time or collaborative systems is a meaningful plus — live data sync, multiplayer state, event-driven architectures
• Frontend architecture depth: component modeling, state management, rendering performance
• Bachelor's degree in Computer Science or equivalent practical experience
• You are actively and concretely building with AI — integrating it into products you own or creating tooling that makes AI more effective