Principal Software Engineer

Working at Atlassian Atlassians can choose where they work – whether in an office, from home, or a combination of the two. That way, Atlassians have more control over supporting their family, personal goals, and other priorities. We can hire people in any country where we have a legal entity. Interviews and onboarding are conducted virtually, a part of being a distributed-first company. To help our teams work together effectively, this role is fully remote, but requires you to be located in the United States. Your Future Team The Growth Platform team builds foundational systems that power engagement, messaging, and personalized user experiences across Atlassian’s entire product ecosystem (Jira, Confluence, Trello, Loom, and beyond). We operate at the intersection of high-scale distributed systems, client-side performance, and experimentation—enabling product teams to deliver cohesive, data-driven customer journeys to millions of daily active users. As a Principal Frontend Engineer , you will serve as the senior technical authority for client-side architecture across our messaging and personalization engines. You will lead architectural direction across multiple squads, partner with product leaders, and establish standard patterns that ensure our user-facing experiences are resilient, fast, accessible, and scalable. In this role, you will: Lead Frontend Architecture & Strategy: Define the long-term client-side technical roadmap and architectural patterns for in-product messaging, notifications, personalization components, and experimentation frameworks. Deliver at Enterprise Scale: Design and implement high-performance, modular React/TypeScript components and client SDKs that seamlessly integrate across all Atlassian web applications. Drive Technical Direction & Trade-offs: Make critical architectural decisions balancing rapid experimentation with long-term reliability, accessibility, security, and rendering performance. Cross-Organizational Influence: Partner closely with Product Managers, Design, Backend/Data Platform teams, and consuming product engineering teams (Jira, Confluence, etc.) to drive seamless platform adoption. Mentor & Elevate Engineering Standards: Actively coach and mentor Senior and Mid-level engineers, lead architecture design reviews (RFCs), and champion frontend best practices and developer productivity across the organization. Foster Operational Excellence: Champion modern telemetry, client-side observability, automated testing, and CI/CD pipelines to maintain exceptional availability and zero-drift user experiences. 10+ years of professional software engineering experience, with primary specialization in modern client-side / frontend architecture and development. Bachelor's or Master’s degree in Computer Science, Engineering, a related technical field, or equivalent practical experience. Extensive hands-on proficiency in modern web technologies: React, TypeScript, modern JavaScript (ES6+), HTML5, and modern CSS architectures. Proven track record as a Staff / Principal Engineer or Technical Lead, with demonstrated experience designing and owning end-to-end frontend architecture for large-scale, high-traffic SaaS applications. Deep browser & client-systems domain expertise, including web performance optimization (Core Web Vitals, bundle-splitting, memory lifecycle, rendering pipelines) and client-side state management architectures. Demonstrated experience in technical strategy & trade-offs, including writing architecture proposals (RFCs), establishing technical roadmaps, and setting engineering quality standards across multiple teams or squads. Track record of technical mentorship and cross-functional leadership, with proven ability to coach senior (P50/P40) engineers and partner effectively with Product Management, Design, and Backend stakeholders without formal authority.