Java Backend Developer Specialist

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: marlus.misael@mb.com.br if you are interested.