Senior Software Engineer I

Etsy is the global marketplace for unique and creative goods. We build, power, and evolve the tools and technologies that connect millions of entrepreneurs with millions of buyers around the world. As an Etsy employee, you will tackle unique, meaningful, and large-scale problems alongside passionate coworkers, all the while making a rewarding impact and Keeping Commerce Human. We believe exceptional companies are built by exceptional teams, and we're intentional about it. That means hiring great people, setting them up for success from day one, and giving them real reasons to grow their careers here. We invest in development that goes beyond promotions, and we foster the trust and relationships that help people do their best work together. What's the Role? As a Senior Software Engineer I, you will be responsible for taking the lead on directing and implementing solutions to moderately complex, loosely scoped problems that are aligned with your team's goals. Your work extends to many parts of a product or system. You deliver projects independently or by leading your teammates to do so. You enable other engineers on your team to be successful. This is a full time role reporting to the Senior Engineering Manager. What does the day-to-day look like? Collaborate closely with Engineers, Product Managers, and Designers to develop solutions to help sellers better run their businesses and remain competitive. Collaborate with our cross-functional teams and business partners across Etsy. Contribute at all levels of our web application stack, ranging from front-end web interfaces to back-end technologies. We use HTML, CSS, JavaScript, TypeScript, React, PHP, MySQL, and Memcache, but it's okay if you don't have experience with all of these! Developing and maintaining critical path product services. Provide detailed and constructive design and code reviews. Gain insights through research, data analysis, and our A/B tests. Push code to production early and often using our continuous deployment systems. Build and maintain observability and test tooling - logging, monitoring, distributed tracing, alerting and offline test tools needed for search and recommendation systems. Practice continuous learning and agile delivery models to stay informed and focused on our deliverables. Of course, this is just a sample of the kinds of work this role will require! You should assume that your role will encompass other tasks, too, and that your job duties and responsibilities may change from time to time at Etsy's discretion, or otherwise applicable with local law. Qualities that will help you thrive in this role are:   More than 5+ years of experience.  Experience in information retrieval systems and ability to write high performance production quality code. Experience operating within a large codebase and you know how to craft simplicity from complex systems.You understand the fundamentals of building robust services. Flexibility with different programming languages and cloud-native environments. Partnering as a strong collaborator and communicator and making the team around you grow and learn. Taking the lead on advising and implementing solutions to loosely scoped problems Demonstrate written understandable, testable code with an eye towards maintainability. You enjoy thinking about the implications of your work on end users, and have an understanding of the various aspects involved in running a large-scale website. Strong communication that adapts to technical and non-technical audiences Curiosity and ability to learn autonomously Experience working with AI Agents and related tools, like MCP servers and skills To be successful in this role, t he Senior Software Engineer I will work collaboratively with your teammates to independently tackle well-scoped problems, regularly deliver work to end users and are a primary contributor to your team's goals. You work on features and projects within a broader product or system. Your