Blue Cube Services is a partner of the world's leading software platform for digital assets. Offering the largest production blockchain platform in the world, we share the passion to code, create, and ultimately build an open, accessible and fair financial future, one piece of software at a time. We are looking for software engineers with a proven track record in building scalable, reliable and performant systems for Fraud. You will play a critical role in building financial and crypto-native products, services and APIs. As a Back-End Engineer you will be participating in technical discussions and making a positive impact on the team's development by advocating the best engineering practices. WHAT YOU WILL DO You will be part of the Brokerage - Fraud team who actively enhance blockchain.com’s fraud prevention. Fraud engineers build fraud prevention mechanisms in conjunction with our data science team for our payment rails by using our internal services together with our partners (SardineAI and Sift) Work with our risk, compliance teams including our providers to resolve customer issues Advocate best practices, code quality, test coverage and drive technical discussions Optimise existing systems for scalability, extensibility and performance whilst building out reusable, modular code for use across Blockchain’s products Ensure security is at the forefront of everything you do, employing advanced encryption schemes to secure user and company data Work within interdisciplinary teams to continually deliver the highest quality software to our users WHAT YOU WILL NEED You know at least one programming language in depth You have at least 3 - 5+ years experience building and shipping highly-available, fault tolerant, production ready distributed backend systems You have experience in any JVM based languages (such as Java, Kotlin, Scala) and are confident in your ability to build, debug and ship microservices You are customer focused and continuously suggest how the backend can provide the best Customer Experience You pride yourself on consistent high levels of test coverage, strong technical documentation and effective monitoring We use Kotlin, PostgreSQL, Kafka, Redis, Datadog, Amplitude, Grafana, BigQuery, ApacheSpark and more A passion for crypto and the transformations it enables Nice to haves SardineAI or Sift experience Working with Data science and Analysts Understanding of fraud models and workflows COMPENSATION & PERKS Competitive salary based on experience. Remote work Apple equipment HMO on day 1 (contractor)