Senior Software Engineer - Collaborative Web Platform

Role Description

Pantheon is building the next generation of web content infrastructure — a real-time, collaborative platform that redefines how teams create, publish, and manage content on the modern web. This is a rare opportunity to join a founding-stage product team at a company with real infrastructure and real distribution behind it.

As a Senior Software Engineer on this team, you will be a technical anchor and a hands-on builder. You will own significant pieces of the platform end-to-end — from API design and backend services to frontend systems and browser-side experiences. You will partner closely with the Staff Engineer and Director of Engineering to make architectural decisions, set quality standards, and accelerate the team toward meaningful milestones.

• 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

Qualifications

• 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.

Benefits

• Industry competitive compensation and equity plan
• Flexible time off, sick days, and 13 paid holidays
• Comprehensive medical insurance including Health, Dental and Vision
• Paid parental leave (plus fertility, adoption and other family planning benefits)
• In-office workspace (San Francisco & Chicago)
• Monthly allowance for wellness, reading and access to LinkedIn Learning for continued development
• Events and activities both team-based and company wide that inspire, educate and cultivate