We are seeking a Senior Full Stack Developer with strong experience in .NET and Angular to help design, build, and maintain modern, scalable software solutions. This role is ideal for someone who enjoys working across the full development stack, collaborating with cross-functional teams, and mentoring other developers while contributing to high-impact applications. As a senior member of the development team, you will play a key role in architecting solutions, building new features, improving system performance, and ensuring code quality throughout the software development lifecycle. What You’ll Do - Design, develop, test, and deploy scalable applications using .NET Core and Angular - Build and maintain RESTful APIs and modern web applications - Contribute to both front-end development (Angular) and back-end services (.NET) - Collaborate with architects, analysts, and QA teams to deliver reliable and high-quality solutions - Participate in system architecture discussions and technical decision-making - Perform code reviews and promote development best practices - Ensure strong unit testing and code quality standards - Troubleshoot and resolve complex technical issues - Mentor junior developers and support a collaborative engineering culture - Stay current with emerging technologies and development trends

• Support ~30 Learners in virtual training programs • Provide synchronous and asynchronous support • Engage in mandatory Pre-Program TA Onboarding • Monitor Slack channels for Learner questions • Check-in with Learners after each live session • Facilitate breakout rooms during lectures • Grade Learner submissions within 7 days • Attend weekly staff meetings with camera on

• Innovate on Ad Products: Lead the development of new ad features and formats, from concept to execution. • Build on Hopper.com: Implement and test new ad experiences on Hopper’s website, serving as the proving ground for features that will be scaled to our partners. • Develop Core APIs: Design, build, and maintain the scalable APIs that serve ad content, handle user interactions, and collect performance metrics. • Contribute to Partner Integrations: Apply your expertise to the development of our client-side Javascript SDK, helping our partners seamlessly integrate HTS Media ad products. • Drive Technical Excellence: Set the standard for high-quality code, performance, and reliability for all our web-facing technologies. • Collaborate and Mentor: Work closely with product, design, and other engineers to ship high-impact solutions and provide technical guidance to the team.

• Verantwortung für den gesamten Stack – von der Architektur bis zum Deployment der Anwendungen. • Aktive Mitgestaltung der Architektur und technologischen Ausrichtung der Softwareprodukte. • Arbeit in einem agilen Team nach der SCRUM-Methode.