Principal Software Engineer - Mobile

About Tripadvisor 

The Tripadvisor Group connects people to experiences worth sharing, and aims to be the world’s most trusted source for travel and experiences. We leverage our brands, technology, and capabilities to connect our global audience with partners through rich content, travel guidance, and two-sided marketplaces for experiences, accommodations, restaurants, and other travel categories. The subsidiaries of Tripadvisor, Inc. (Nasdaq: TRIP), include a portfolio of travel brands and businesses, including Tripadvisor, Viator, and TheFork.

The Tripadvisor Experiences Engineering team is distributed across Europe and is responsible for the platform, mobile apps and all their supporting infrastructure. We run the systems that help operators build their businesses and those which enable third parties to utilise our inventory. We provide the tools which help our customer services team provide world class service to travellers and operators internationally.

About the Role

We’re looking for a Principal Software Engineer experienced in mobile development to join our Tripadvisor Experiences team. We are unable to offer B2B contracts at this time. This role is open to candidates based within a commutable distance (generally up to 1.5 hours) of our office hub in Kraków. We embrace flexibility in where and how work gets done and also value meaningful in-person moments to connect and collaborate. You can expect a remote-first working model with periodic in-person gatherings at your closest office for team connection, planning, or other key moments.

Would you like to build features end to end? Would you enjoy working with a large number of technologies? Do you like moving quickly, releasing features daily, working with other smart and talented engineers? If this sounds like you, we’d love to talk to you.

What you will do

• Drive the design and architecture of complex, scalable mobile application systems that underpin our customer-facing technology solutions. Capable of designing long-lasting mobile architectures to solve complex problems including performance, reliability, scalability, offline behaviour, consistency, and quality, often across an engineering pillar.
• Conduct design reviews at both the engineering pillar level and across the broader engineering organization, with a strong focus on mobile app architecture, platform evolution, and cross-platform integration.
• Lead generalisable improvements in mobile operational maturity for the platform, promoting best practices across areas such as release management, app stability, observability, performance monitoring, and incident response.
• Work closely with engineering managers, other principal and senior principal engineers to drive technology strategy and roadmap that aligns with the wider organisation or group vision.
• Partner with Product Manager(s) and Engineering Manager(s) to establish clear technical delivery milestones for key mobile initiatives and help drive delivery within the agreed scope, quality, and timelines.
• Build trusted leadership by being regarded as a go-to person across a wide number of mobile technologies, development practices, and tools used within an engineering pillar or group.
• Communicate effectively with technical and non-technical stakeholders to ensure alignment on project goals, technical trade-offs, commitments, and timelines.

What we’re looking for

• 8+ years of experience in commercial software development, with significant experience delivering large-scale native mobile applications.
• Demonstrated excellence in working with cross-functional teams in fast-paced environments, providing both hands-on technical leadership and effective cross-team collaboration.
• Excellent command of tools and techniques for troubleshooting mobile production issues, including crash analysis, performance diagnostics, and release health.
• Strong experience designing and evolving scalable mobile systems from conception through production operation.
• Deep understanding of mobile software architecture, design principles, and engineering best practices across iOS and Android ecosystems.
• Deep experience with mobile platforms iOS and Android, native languages including Swift, Kotlin, Objective-C, and Java, and modern mobile architectural patterns. Experience with shared code and cross-platform approaches such as Kotlin Multiplatform. Strong architectural understanding of mobi