Role Description We are looking for a Middle/Senior Java Developer to join the Research & Development Team. As a backend developer, you will play a crucial role in managing the entire order lifecycle, encompassing: - Order capture - Validation - Routing - Execution - Option price calculation - Reconciliation Our priority is to deliver high-performance, low-latency, and fault-tolerant solutions, with a strong emphasis on code quality through comprehensive code reviews and rigorous testing. Although our product holds a substantial presence, we consistently address both functional and non-functional requirements while responsibly managing technical debt. Our work environment is agile, primarily utilizing Scrum, and is supported by tools such as Atlassian, Slack, Sonar, Docker, and others. We expect our Middle/Senior Java Developer to: - Develop reliable, high-performance distributed systems - Optimize, document, and maintain code with thorough test coverage - Collaborate effectively with colleagues and embrace constructive feedback - Conduct meticulous, blame-free code reviews to continually improve code quality - Perform analysis to effectively address multi-threading issues - Work collaboratively with experienced team members in a complex business environment - Understand detailed business requirements within the finance industry Qualifications - Proficient in Java 11+ with experience in Collections, Streams, Threads, and Concurrency - Familiar with Spring, AspectJ, and Kotlin - Skilled in using JUnit5 and Mockito for effective testing - Experienced with Docker, PostgreSQL, Liquibase, Prometheus, and ELK - Exposure to distributed systems, with a focus on performance and reliability - Understanding of asynchronous communication principles - Knowledge of relational database internals, including indexes and locks - Experience in debugging heap and thread dumps - Proficient in code profiling using tools like YourKit, JProfiler, and Visual VM - Strong knowledge of Unix/Linux - Familiar with trading and capital markets - B2+ English proficiency Benefits - Flexible work arrangement with the possibility of remote work from anywhere in Brazil, subject to business needs and team alignment - Meal Voucher Program (BRL 40 per working day) - 30 calendar days of paid vacation per year Company Description Devexperts works with respected financial institutions, delivering products and tailor-made solutions for retail and brokerage houses, exchanges, and buy-side firms. The company focuses on trading platforms and brokerage automation, complex software development projects, market data products, and IT consulting services.

• Develop and maintain Python-based microservices in a distributed environment. • Design and build scalable backend services with a focus on performance and reliability. • Integrate third-party APIs and external services into existing systems. • Collaborate with product, engineering, and DevOps teams to deliver new features and improvements. • Work with AWS services (e.g. Lambda, cloud infrastructure) to build and deploy applications. • Support deployments and system operations through CI/CD pipelines (GitLab). • Contribute to code reviews and follow engineering best practices. • Troubleshoot and resolve issues in production environments. • Contribute to improving system performance and handling increasing system load.

• Design and implement scalable Python microservices in a distributed architecture. • Build and optimize high-performance backend systems, ensuring scalability and reliability under high load. • Integrate and manage third-party APIs and external services. • Collaborate with cross-functional teams to define technical solutions and system design approaches. • Work with AWS services (e.g. Lambda, cloud infrastructure) to architect and deploy solutions. • Improve and maintain CI/CD pipelines and deployment processes in collaboration with DevOps. • Lead and contribute to code reviews, ensuring high engineering standards. • Identify system bottlenecks and drive performance and scalability improvements. • Troubleshoot complex production issues in distributed systems. • Contribute to technical discussions and guide best practices within the team.

• Working on backend development in Java within a network domain • Transforming network feature definitions based on XML/XPath into Java-based implementations • Building and extending backend services and APIs supporting automation workflows • Integrating AI agents into development and automation processes (AI-assisted code generation and validation) • Ensuring code quality through unit and integration testing • Investigating and resolving bugs, performance issues, and scalability challenges • Collaborating with engineers, QA, and architects in an agile environment • Participating in code reviews and technical discussions • Supporting continuous improvement of development and automation processes