Remote Kotlin​/Java Backend Developer

Join to apply for the Remote Kotlin / Java Backend Developer role at Scanz

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.

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.

• 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 (Postgre
  
  SQL).
• Improve the system’s throughput and incorporate performance testing into our CI pipelines.
• Scale services horizontally.
• Participate in weekly standups.

• Kotlin
• Spring Webflux
• Ktor Server
• Kotlin Coroutines
• RSocket
• Ktor Client
• Kotlinx Serialization
• Quartz
• Kotest + JUnit
• Gradle

• Kotlin Multiplatform
• React (with hooks)
• Shared Worker
• Type Script
• NPM
• Gradle

• AWS + S3
• Prometheus
• Grafana
• Jenkins
• Git Hub

• 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 spread across 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 Postgre
  
  SQL.
• 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.
• Familiarity with AI tools like Claude Code.

• Work within a company with a solid track record of success.
• Work alongside and learn from best‑in‑class talent.
• Excellent career development opportunities.

Referrals increase your chances of interviewing at Scanz by 2x.