Title: Principal Software Engineer (Experiences) Location: Poland, Kraków Hybrid Job Description: 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 Tripadvisor.com, the Tripadvisor 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. We’re looking for a Principal Software Engineer to join our fast-growing team. This role is open to candidates based within a commutable distance (generally up to 1.5 hours) of our Cracow office. 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. This is a permanent contract of employment/Umowa o pracę. What you'll do: - Drive the design and architecture of complex, scalable systems that underpin our technology solutions. Capable of designing long-lasting systems to solve complex problems (including scalability, reliability, consistency and quality) often across an engineering pillar. - Conduct design reviews at both the engineering pillar level and across the broader engineering organization. - Leads generalisable improvements in operational maturity for his platform and promotes best practices with other engineers when it comes to operations. - Work closely with engineering managers, other principal and senior principal engineers to drive technology strategy and roadmap that aligns to the wider organisation vision. - Partners with Product Manager(s) and Engineering Manager(s) to establish clear technical delivery milestones for key initiatives and then helps to drive delivery within the agreed scope, quality and on time. - Build trusted leadership by being regarded as a go-to person across a wide number of technologies, practices, and tools used in an engineering pillar. - Communicate effectively with technical and non-technical stakeholders to ensure alignment on project goals, commitments, and timelines. Skills & Experience: - 10+ years of experience in commercial software development. - Demonstrated excellence in working with cross functional teams in fast-paced environments, both in terms of technical leadership and cross team collaboration. - Excellent command of tools and expertise for troubleshooting production issues. - Experience around building scalable and distributed software systems, from conception to production. - Experience of software architecture, design principles and engineering best practices. - Experience with AWS or Azure cloud platforms, object-oriented programming languages such as Java, Python, or Scala, and working with both SQL and NoSQL databases. - Exposure to the data engineering ecosystem will be a huge plus. Why Join Us? - Competitive compensation packages, including base salary and annual bonus. - “Work your way” with flexibility to suit your lifestyle. We take a remote-friendly approach to collaboration, with the option to join on-site as often as you’d like in select locations. - Flexible schedule. Work-life balance is ingrained in our culture by design. Trust and accountability make it work. - Donation matching. Give back? Give more! We match qualifying charitable donations annually. - Tuition assistance. Want to level up your career? We love to hear it! Receive annual support for qualified programs. - Lifestyle benefit. An annual benefit to spend on yourself. Use it on travel, wellness, or whatever suits you. - Travel perks. We believe that travel is employee development, so we provide discounts and more. - Employee assistance program. We’re here for you with resources and programs to help you through life’s challenges. - Health benefits. We offer great coverage and competitive premiums. Perks of Working at Tripadvisor - Competitive compensation packages, including base salary, annual bonus, and more. - “Work your way” with flexibility to suit your lifestyle. We take a remote-friendly approach to collaboration, with the option to join on-site as often as you’d like in select locations. - Flexible schedule. Work-life balance is ingrained in our culture by design. Trust and accountability make it work. - Donation matching. Give back? Give more! We match qualifying charitable donations annually. - Tuition assistance. Want to level up your career? We love to hear it! Receive annual support for qualified programs. - Lifestyle benefit. An annual benefit to spend on yourself. Use it on travel, wellness, or whatever suits you. - Travel perks. We believe that travel is employee development, so we provide discounts and more. - Employee assistance program. We’re here for you with resources and programs to help you through life’s challenges. - Health benefits. We offer great coverage and competitive premiums. Our Cultural Pillars: - Traveller first: We exist to create value for our customer, the traveler. We enable our suppliers and partners to unlock this value. Their collective behaviors and insights are what drives us. - Execution is our edge: We act fast, experiment, learn from failure, iterate, and improve the solutions of tomorrow across every aspect of our business. Our execution is agile, data-driven, prioritised, and built to scale. We assume no problem is someone else’s problem and finish what can be done today, knowing tomorrow will bring fresh challenges. - We succeed together: The best outcomes are driven by empathic, humble, and diverse subject matter experts working toward shared goals. We collaborate relentlessly, challenge assumptions, give actionable feedback, and set each other up for success through empowered teams with a clear charter. We transparently take ownership of our growth, individually and as a team. We celebrate the quality of our effort, our learnings, and our collective achievements. We strive to create an accessible and inclusive experience for all candidates. If you need a reasonable accommodation during the application or the recruiting process, please make sure to reach out to your individual recruiter or our team at AccessibleRecruiting@tripadvisor.com. If you have any additional questions about careers at Tripadvisor you can email us at recruitment@tripadvisor.com. We have all the answers! #LI-Hybrid

• Own end-to-end solution architecture for data ingestion, transformation, and interoperability • Lead backlog prioritization, sprint planning, and delivery execution • Provide technical direction across data engineering, AI/ML, and system integration • Coordinate stakeholders and ensure alignment to mission objectives • Oversee DevSecOps processes, including CI/CD, testing, and release management • Maintain compliance with security, privacy, and operational requirements

Role Description We are looking for a talented Full Stack Developer to join our growing team at Luminex and help us progress our product. You will be working across both front-end and back-end development, building robust, scalable, and secure web applications that directly support our products. This role requires versatility and hands-on expertise with a variety of technologies, as you’ll be expected to contribute to all layers of development. - Design, develop, and maintain robust, scalable, and secure full-stack web applications. - Build intuitive and responsive user interfaces using JavaScript frameworks. - Develop server-side logic, APIs, and database interactions using Java, PHP, and SQL. - Create, maintain, and optimize front-end components using HTML, JavaScript, jQuery, and CSS frameworks (e.g., Tailwind, Bootstrap). - Write scripts and integrate with back-end processes where the GUI acts as a wrapper to bash scripts. - Ensure code quality through proper testing, debugging, and adherence to coding standards. - Integrate third-party libraries, APIs, and systems into the application. - Maintain and enhance existing applications, ensuring compatibility with evolving technologies. - Monitor application performance and troubleshoot issues to ensure optimal functionality. - Collaborate with product managers, designers, and stakeholders to translate business requirements into technical specifications. - Work closely with cross-functional teams, including UI/UX designers, QA engineers, and DevOps teams. Qualifications - 5+ years of experience as a Full Stack Developer or in a similar role. - Hands-on experience in building and deploying full-stack web applications. Requirements - Front-End Development: - Proficiency in JavaScript and jQuery. - Strong understanding of component-based architecture. - Experience with modern build tools (PhpStorm etc...). - Knowledge of responsive design and CSS frameworks (Bootstrap). - Back-End Development: - Strong proficiency with PHP development. - Experience with PHP frameworks (Zend, Laravel). - Experience building RESTful APIs and microservices. - Proficiency in SQL and database systems (e.g., MySQL, PostgreSQL, MongoDB). - Knowledge of authentication and authorization mechanisms (e.g., OAuth, JWT). - Experience with bash scripting is a strong plus. - Additional Skills: - Proficiency with Git and version control best practices. - Experience with Angular. - Strong problem-solving, debugging, and analytical skills. - Ability to thrive in a collaborative, cross-functional environment.

• Work closely with colleagues to build solutions to customer problems • Make valuable changes in the codebase and see them live in production • Write and review high-quality, well-tested code • Identify areas for improvement in the codebase and team processes • Own the problems being solved and the software written • Collaborate with Product and Design teams on features