Principal Backend Engineer, Collaboration Platforms

ClickUp is revolutionizing the way the world works. As the only all-in-one productivity platform built from day one for true convergence, ClickUp unifies tasks, docs, chat, calendar, enterprise search, and more—supercharged by context-driven AI. While others scramble to bundle fragmented tools or bolt on AI, we anticipated this future and made it our foundation from the start. Headquartered in San Diego with a rapidly expanding global footprint, we empower over three million teams to break free from silos and reclaim their time—saving at least one day every week. Join ClickUp, one of the fastest-growing SaaS companies on the planet, and help millions of users transform the way they work. We’re not just building software. We’re shaping the future of work. Come join us in building the future—together. 🦄  ClickUp is a high-growth SaaS company building an all-in-one productivity platform. We've unified project management, document collaboration, chat, and more to help over 20 million users and thousands of teams work more efficiently. With over $300 million in ARR, we're scaling rapidly and solving complex technical challenges to support our global user base.   The Opportunity: At ClickUp, our real-time collaborative surfaces are at the heart of our product. We are looking for a pivotal technical leader to own the architectural vision for these tools and set a new standard of performance and reliability for our enterprise customers.   This is fundamentally a distributed systems challenge. You will be accountable for the core architecture that allows millions of concurrent users to collaborate with ultra-low latency. Your work will require a deep understanding of these real-time systems, including state consistency, concurrency models, and the trade-offs of CRDTs and operational transforms.   This isn't a role for a whiteboard architect. This is a hands-on leadership opportunity to transform a complex, mature architecture into a world-class, unified platform. You will diagnose deep, cross-cutting root problems, design a pragmatic path to overhaul our core systems, and lead by doing. Your success will be measured by the tangible improvement in our product's performance and the lasting, positive impact you have on ClickUp’s engineering culture.   What You’ll Do:

• Own the long-term technical strategy for ClickUp’s core collaboration platforms, including real-time editing (RTE), live canvases, file uploads, and media streaming.
• Solve our most ambiguous architectural challenges by diving deep across our full stack (Angular, Quill, WebSockets, Yjs, NodeJS, PostgreSQL, AWS).
• Champion operational excellence across the organization by implementing architectural patterns that improve the reliability of all our systems.
• Ship complex, multi-quarter initiatives that unify our collaborative surfaces and provide a significant competitive advantage in the enterprise market.
• Mentor the next generation of technical leaders and elevate ClickUp's engineering culture through your leadership and influence.

Who You Are:

• You are a hands-on technical leader who thrives on solving complex problems that span frontend, backend, and infrastructure boundaries.
• You are a T-shaped engineer with deep expertise in at least one complex technical domain (e.g., real-time collaboration, media pipelines, distributed systems) and a proven ability to apply that depth to new areas.
• You don't just modernize legacy systems; you know how to transform them incrementally into scalable and maintainable platforms.
• You lead through influence, not authority. Your technical credibility and pragmatic communication allow you to align diverse stakeholders around a shared vision.
• You see a complex architecture not as a blocker, but as an opportunity to deliver transformative, lasting improvements.
• You have specific experience with collaborative technologies, which is a significant plus.
• You consistently solve the problems that others can't and act as a force multiplier for every team you work with.

What We're Building Together: As a rapidly scaling company, we are actively maturing our engineering practices. We are not looking for someone to simply fit into our culture; we are looking for a leader to help us build it.

• We build with intention. We believe that moving fast is about being iterative, pragmatic, and focused. You will champion clear engineering roadmaps and thoughtful planning to shield your teams from whiplash and create a stable environment for deep work.
• We trust our engineers with deep ownership and the autonomy to manage their work and time. We are looking for leaders who can help us define and measure what truly matters: the impact we deliver to our users. You will champion a culture where quality and