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Senior Software Engineer - Collaborative Web Platform at Pantheon · LumiJobs · LumiJobs

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Pantheon· Posted 2026-06-27

Senior Software Engineer - Collaborative Web Platform

Remote (USA)full timeRemote

senior

$140k–$175k

H1B: no

Pantheon Senior Software Engineer at Pantheon responsible for owning significant pieces of the collaborative web platform end-to-end. This includes API design, backend services, frontend systems, and browser-side experiences while partnering on architectural decisions.

Responsibilities

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. Content management has been largely unchanged for two decades. Pantheon is uniquely positioned — with deep roots in the web platform, a global CDN, and a sophisticated branching model trusted by thousands of organizations — to build the collaborative content experience the modern web deserves.
This is a rare opportunity to join a founding-stage product team at a company with real infrastructure and real distribution behind it. The architecture is being defined now. The decisions made in the next few months will shape how developers and content teams experience the web for years to come.
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.
This role requires both breadth and depth. You are comfortable owning a problem from design through delivery, writing the code and the tests, and helping less experienced engineers do the same. You understand that great infrastructure and great product experience are not in tension — they are the same problem viewed from different angles.

Qualification

Build backend servicesWrite cleanWhat You Bring to the TableStrong API design experience

Required

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
What You Bring to the Table
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