Remote Kotlin / Java Backend Developer

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