Frontend Developer building intuitive and seamless cross - platform sports betting applications at iGaming startup. Focusing on coding, debugging, and enhancing user experience in Lisbon.
About the role
- Senior Backend Engineer developing systems for detecting fraud and ensuring app stability at OfferUp. Collaborating with cross-functional teams to enhance engineering excellence and mentor junior engineers.
Responsibilities
- 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 Core engineering team
- Collaborate with OfferUp-wide engineering teams to improve processes, surface common pain points, develop solutions, and evangelize best practices
- 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
- Develop highly scalable classifiers and tools leveraging machine learning, data regression, and rules-based models
- Ensure app stability by identifying and resolving crashes, freezes, and network errors across both React Native and native layers
- Develop reusable tools and frameworks to streamline development and improve the developer experience
- Mentor and guide junior engineers, fostering best practices for frontend and native development.
Requirements
- 5+ years of professional software engineering experience, of which at least 3 were devoted to web services
- 2+ years of experience in real-time messaging systems
- Experience performing data analysis and translating the results into business recommendations
- Experience in working with data-driven applications at scale
- 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
- Proficiency in native development languages: Swift/Objective-C (iOS) and Kotlin/Java (Android) (helpful but not required)
- Experience with Agile development methodologies (helpful but not required)
- Experience with load balancing and handling massive data traffic (helpful but not required)
- Experience writing code in Python and Java (helpful but not required)
- Experience with cloud infrastructure AWS (helpful but not required).
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