Senior Java Engineer

Senior Java Engineer

Our client, a leading financial services firm in Chicago, is seeking a Senior Java Engineer to join their core engineering team. This engineer will design and build high-performance, scalable backend systems that support real-time financial applications. The ideal candidate has deep experience with distributed systems, messaging, and high-throughput environments.

$/yr - $/yr

• Design, develop, and maintain backend services using Java and the Spring ecosystem (Spring Boot, Spring MVC, Spring Data, etc.).
• Build and optimize microservices supporting large-scale, low-latency financial platforms.
• Develop real-time streaming and event-driven solutions using Apache Kafka.
• Implement highly reliable, multi-threaded and concurrent systems for processing financial transactions/data.
• Collaborate with cross-functional teams (Dev Ops, Product, Architecture, QA).
• Ensure system reliability, performance, and scalability through profiling, tuning, and optimization.
• Write clean, testable code and participate in peer code reviews.
• Integrate with internal and external APIs, services, and distributed systems.
• Support production systems, troubleshooting complex performance and reliability issues.

• 5-8+ years of backend engineering experience with Java.
• Strong command of Java 8+, including Streams, Lambdas, collections, and JVM internals.
• Expert-level experience with multithreading, concurrency patterns, and asynchronous programming.
• Hands-on experience building microservices using Spring Boot.
• Production experience with Kafka (producers/consumers, partitions, schema management, message reliability).
• Experience with relational databases (e.g., Postgre
  
  SQL, MySQL, Oracle) and ORM frameworks (e.g., Hibernate/JPA).
• Strong understanding of RESTful APIs, distributed systems, and event-driven architectures.
• Familiarity with CI/CD pipelines, Git, and automated testing frameworks (JUnit, Mockito).
• Experience in financial services or other regulated, high-performance, low-latency environments (strong plus).

Java, Spring, Kafka, SQL, multi-threading, concurrency.

Mid-Senior level

Full-time

Finance

Banking, Capital Markets, and Insurance Agencies and Brokerages

Oscar Associates Limited (US) is acting as an Employment Agency in relation to this vacancy.