Junior Software Development Engineer - Backend, Trust and Safety (@Remote, Chile and Colombia)

About the role:OfferUp is looking for a backend developer to join the Trust & Safety team. The team builds systems that detect and prevent fraudulent behavior in our marketplace. These systems help to maintain our community guidelines and support our partner team's growth and business strategies. The key problems we focus on are Account takeovers, Phishing, Payment chargebacks, and Prohibited Items.At many organizations, your role begins and ends with the code. On our team, we’re different. You own a feature from concept to fruition. Your responsibilities will include everything from writing well-architected and thoroughly tested code, to rolling out the feature by analyzing metrics. You also get to take ownership beyond your technical area by working with cross-functional team members.This role is only available outside the US and not available to any individual based within the US or any US territory.Here’s more of what you will get to do:• Work collaboratively with cross-functional teams (risk analysts, data science, and operations) to design and implement new features• Analyze the latest attacker techniques and apply solutions to detect them holistically and stop them proactively• Drive engineering and operational excellence across the Trust & Safety engineering team• Collaborate with OfferUp-wide engineering teams to improve processes, surface common pain points, develop solutions, and evangelize best practices• Develop highly scalable classifiers and tools leveraging machine learning, data regression, and rules-based models• Identify when to replace and when to rebuild legacy systems• Participate in reasonable on-call rotations with the rest of the team• Support, mentor, and help other engineers on the teamYou’ll thrive in this role if you have:• 3+ years of professional software engineering experience, of which at least 1 was devoted to web services• Experience performing data analysis and translating the results into business recommendations• Strong coding skills in Java, Python, Scala, Golang or any other modern programming language coupled with strong knowledge in object-oriented design and microservices architecture• BS or MS in Computer Science or equivalent experience• Excellent communication skills, both written and spoken (fluency in English required)Helpful, but not required:• Experience with Identity, authentication, and authorization systems• Experience with anomaly detection, bot detection, machine learning, pattern recognition and/or data mining• Experience in building microservices• Experience with cloud infrastructure AWSAbout OfferUp:OfferUp is the largest mobile marketplace for local buyers and sellers in the U.S. We are changing the way people buy and sell in their communities by providing a uniquely simple and trusted experience on our iOS and Android apps. Our goal is to be the platform of choice for local commerce by connecting buyers and sellers through an interface that makes selling an item as easy as snapping a picture from a mobile device. OfferUp was founded in 2011 and has grown to serve local markets across the U.S. with more than 1 in 5 adults using OfferUp in 2022.More About OfferUp At a Glance• Top 10 Shopping app in the App Store and Google Play Store for three years• 15%+ of adults in several markets use OfferUp every month (LA, Miami, Phoenix, Seattle, Las Vegas, Riverside, Orlando)• OfferUp works directly with nearly 2000 US law enforcement agencies to build trust in local communitiesOfferUp is changing the way people buy and sell locally, and we’ve built a dynamic team to do it. To learn more about what it’s like to work at OfferUp, check out our blog: https://blog.offerup.comOfferUp provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability, or genetics. In addition to federal law requirements, OfferUp complies with applicable state and local laws governing nondiscrimination in employment in every location in which the company has facilities. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, transfer, leaves of absence, compensation, and training.OfferUp expressly prohibits any form of workplace harassment based on race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, genetic information, disability, or veteran status. Improper interference with the ability of OfferUp’s employees to perform their job duties may result in discipline up to and including discharge.