Remote Kotlin / Java Backend Developer

Scanz has been working for nearly two decades in the real\-time trading technology and fintech space. We deliver complex technological systems that enable serious traders worldwide. By joining Scanz, you’ll become a part of a company that fosters self\-improvement and actively seeks out\-of\-the\-box ideas. Our teams work together to create the next generation of financial software solutions. We welcome all candidates who believe, as we do, that innovation is grounded in education. **The Role** We are seeking an expert\-level Backend Developer to join our dynamic team and contribute to the development of robust, scalable server\-side applications and data pipelines. You will primarily work with Spring Webflux and Kotlin (and Java). Although existing expertise in Kotlin is preferred, a deep understanding of Java is acceptable if there’s a willingness to adapt and transition quickly. Scanz is a leading SaaS Trader Terminal that provides a suite of real\-time trading tools to help traders and investors identify live trading opportunities in the US stock market. We are dedicated to offering our users – from trading pros to absolute beginners – an intuitive and efficient trading experience. **Responsibilities** * Design and implement server\-side logic using Spring Webflux and Kotlin. * Build robust, reliable, fault\-tolerant data pipelines that process millions of operations daily. * Collaborate with front\-end developers to integrate user\-facing elements with server\-side logic. * Develop and maintain APIs, ensuring high performance and responsiveness. * Contribute to database design and implementation (PostgreSQL). * Improve the system’s throughput and incorporate performance testing into our CI pipelines. * Scale services horizontally. * Contribute to weekly standup. **Back End Tech Stack** * Kotlin * Spring Webflux * Ktor Server * Kotlin Coroutines * RSocket * Ktor Client * Kotlinx Serialization * Quartz * Kotest \+ JUnit * Gradle **Front End Tech Stack** * Kotlin Multiplatform * React (with hooks) * SharedWorker * TypeScript * NPM * Gradle **Infrastructure** * AWS \+ S3 * Prometheus * Grafana * Jenkins * Github **Ideal Profile** * Strong proficiency in Kotlin / Java. * Proficiency with Kotlin coroutines (flows). * Proficiency with Spring Webflux and Reactive Streams back pressure. * Self\-motivated developer comfortable working as a core member on an A\-list team of backend and frontend developers split over different time zones. * Strong problem\-solving and analytical skills. * Excellent collaboration and communication skills within an asynchronous environment (Slack, Loom). * Deep\-level understanding of distributed systems and how to make fault\-tolerant applications. * Experience with containerization technologies (Kubernetes, Docker). * Strong familiarity with database systems, particularly PostgreSQL. * Comfortable using AWS and cloud computing platforms. * Solid understanding of the testing pyramid, specifically unit, integration, and E2E tests. * Readiness and desire to participate in code reviews. * Familiar with AI tools like Claude Code. **What's on Offer?** * Work within a company with a solid track record of success * Work alongside \& learn from best in class talent * Excellent career development opportunities