Software Development Engineer II (Remote @ Colombia)

About the role: The OfferUp Connect team builds the moments that turn a listing into a sale. Every chat between buyers and sellers, every offer notification, and every saved-search alert runs through services we own, from messaging and notifications to location, meetups, and the subscriptions sellers pay for. We run high-volume Java microservices and streaming pipelines, integrate with partners like Braze, Amazon Pinpoint, Apple, and Google, and use experimentation to decide what ships. We also take on high-visibility work beyond our domain. Connect built OfferUp 's video infrastructure for listing videos and LLM-powered catalog enrichment on Amazon Bedrock, both company priorities that changed what buyers see every day. The roadmap is wide open for someone who wants to help shape it. As a Software Development Engineer II, you'll own features from concept to rollout: designing and writing well-tested code, launching experiments, and measuring results with Product, Design, and Data partners. You'll raise the quality of the code around you and get the chance to join the next project like video or catalog enrichment. Here’s more of what you will get to do: Design, build, and deploy backend services and event-driven pipelines for messaging, notifications, location, and subscriptions Improve the reliability, latency, and delivery rates of high-volume messaging and notification systems, including retries, rate limiting, and frequency capping Integrate with and operate third-party p