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.
Requirements:
- 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.
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