Senior Software Engineer - Collaborative Web Platform

Pantheon Systems, Inc

10h • Hybrid

About The Position

Pantheon is a company that brings together exceptional builders to drive meaningful impact and shape the future of the web. They power over 300,000 websites globally for major organizations like Google and the United Nations, using their WebOps platform for WordPress, Drupal, and Next.js sites. Pantheon operates with a philosophy of foundation and freedom, fostering a vibrant, remote-forward team of experts. The company is currently building the next generation of web content infrastructure, a real-time, collaborative platform designed to redefine how teams create, publish, and manage content. This initiative represents a rare opportunity to join a founding-stage product team with significant existing infrastructure and distribution. As a Senior Software Engineer, you will be a technical anchor and a hands-on builder, owning significant platform components end-to-end, from API design and backend services to frontend systems and browser experiences. You will collaborate closely with Staff and Director-level engineers on architectural decisions and quality standards, taking ownership of problems from design through delivery, including coding and testing, and mentoring less experienced engineers. The role emphasizes that great infrastructure and product experience are two sides of the same coin.

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
• 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

Nice To Haves

• Experience with real-time or collaborative systems is a meaningful plus — live data sync, multiplayer state, event-driven architectures

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
• Write clean, well-tested code and help establish quality standards for the 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

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

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Number of Employees: 101-250 employees