Java Backend Developer Specialist
Oportunidade Mercado Bitcoin · São Paulo, SP, BR
We are looking for a Java Backend Developer Specialist to join our trading engine team. You will work on the development and maintenance of high\-performance distributed systems, handling complex scenarios and critical environments where high performance, resilience, and low latency are fundamental. ### **What will you do?** * Development and Maintenance: Develop and maintain robust Java applications collaboratively and incrementally with other team members. * Distributed Systems \& High Performance: Design and operate high\-availability systems, focusing on resilience, low latency (below milliseconds), and performance optimization in critical scenarios. * Data Consistency: Handle complex distributed transaction scenarios, ensuring data integrity and consistency across multiple microservices. * Observability: Develop observability\-oriented microservices, applying best practices for monitoring, failure anticipation, and proactive incident management. * Technical \& Collaborative Role: Actively participate in ceremonies (technical refinements, plannings, reviews), contributing directly to architecture decisions and product strategies. * Write and Maintain Automated Tests: Quality is achieved through automated testing of everything developed; therefore, building and delivering tests is part of the definition of done. ### **What do we need you to have?** * Language \& Messaging: Consolidated experience in Java (JDK 11\+) and practical experience in message\-based architectures. * Messaging / Events: Knowledge of ultra\-high\-performance or distributed messaging (Aeron/Hydra, Apache Kafka, or similar). * Databases: Solid experience with relational databases (preferably PostgreSQL). * Communication \& Protocols: Mastery of WebSockets, custom protocol design, and familiarity with financial market protocols (such as FIX). * Binary Serialization: Experience with high\-performance binary codecs such as SBE, Protobuf, or FlatBuffers. * Automation \& Testing: Mastery of Gradle for build automation and solid experience with automated testing using Cucumber under the BDD approach. * Infrastructure \& OS: Mastery of Docker for containerization/environment management and ease of working in a Linux environment. * Knowledge of Observability, Telemetry, and Monitoring: + RPM / Throughput, Response time (50%, 95%, 99%) + Memory usage/limit + CPU usage/limit + Error rate * Knowledge of OpenTelemetry and its paradigms: * + Exporters, Collectors, Trace, Span, Metric ### **Nice to Have** * Knowledge of the financial domain: basic concepts of trading in order books, order types, fee models, and balance control rules. Please, send an email to: [email protected] if you are interested.