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

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. 

As a backend developer, you will build highly scalable systems to detect and prevent fraud and continuously improve our engineering/operational excellence.

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 team

You’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, Computer/Software Engineering, Information Systems/Technology, Information Science, or a related discipline
• 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 AWS

About OfferUp:

OfferUp is dedicated to creating the simplest and most trusted way for people to buy, sell, and connect in their local communities. One of the top local marketplace apps for local buyers and sellers in the U.S., OfferUp makes it easy for people to discover more of what they need—from great deals and secondhand goods to jobs, services, home rentals, and more—right in their own communities. Our trusted platform empowers millions to connect, thrive, and move life forward. 

Available on iOS and Android, OfferUp has consistently ranked among the top shopping apps. Founded in 2011 and based in Bellevue, WA, OfferUp serves local markets nationwide and was used by more than 1 in 6 adults in the U.S. in 2024. OfferUp is backed by leading investors, including Andreessen Horowitz, Warburg Pincus, GGV Capital, T. Rowe Price, and Coatue Management. https://about.offerup.com

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 major 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 communities

OfferUp is unleashing the power of local, and we’ve built a dynamic team to do it. To learn more about working at OfferUp, check out https://about.offerup.com/people 

OfferUp 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.