Senior Software Engineer, Etsy

• We’re looking for someone who thrives in collaborative environments, challenges the status quo, and enjoys solving complex problems
• We also value someone who embodies Etsy’s blameless engineering culture, as we believe clear communication, honest feedback, and empathy are the foundation for how we work together and get things done
• You’re excited about full-stack development, particularly in the context of building experimentation platforms
• You have familiarity with A/B testing frameworks and experimentation workflows
• You’ve built (and have some experience in designing) reliable, scalable systems and enjoy working on backend services and APIs
• You write clean, testable code in one or more of the following languages: PHP, Python, or Java
• You’re proficient with MySQL (or similar relational databases) and understand how to design effective data models
• You have experience with cloud platforms such as Google Cloud Platform, AWS, or Azure
• You’re comfortable using Git and understand different branching strategies
• You’re comfortable working in Linux-based environments and using the command line

Desirable

• Etsy is looking for a passionate Senior Software Engineer to help us enable data-driven learning and decision-making for our Experimentation initiative
• You'll join the Experimentation Orchestration team which focuses on making experiment setup simple, intuitive, and reliable
• We build the core services, APIs, and tools that help teams configure and launch experiments with confidence
• Whether it’s feature flagging, observability, traffic allocation, or ensuring a consistent user experience, our work sits at the heart of a seamless experimentation workflow
• Our mission is to make testing new ideas effortless — so teams can move faster, learn more, and build better products for our buyers and sellers
• This is a high-impact opportunity to contribute to experimentation infrastructure that enables product development across Etsy
• This is a full-time position reporting to the Engineering Manager, Experimentation Orchestration
• This team collaborates with engineers, analysts, and product managers — both within and beyond the Experimentation initiative — to improve Etsy’s experimentation platform
• They also Contribute to the design, development, and maintenance of systems that support experiment configuration and orchestration
• You'll participate in code reviews, technical discussions, and architecture planning sessions
• You'll also play a role in driving technical and product direction through thoughtful decision-making and collaboration
• You'll also have a chance to continuously learn and grow by working alongside experienced engineers and contributing to a culture of knowledge sharing