Senior Java Software Engineer

Senior Software Engineer – Java (St. Louis, MO)

About the Role

We are looking for a highly skilled Senior Software Engineer (Java) to join an elite engineering team working on high-scale, mission-critical systems. This role is ideal for engineers who enjoy solving complex problems, care deeply about code quality, and take a craftsman-like approach to software engineering.

You will work on platforms that operate at extreme throughput (TPS), handle critical workloads, and demand thoughtful system design, reliability, and performance at scale.

• Design, build, and maintain high-performance, scalable backend systems using Java
• Solve complex technical problems using a consultative and analytical mindset
• Collaborate with experienced engineers to evolve architecture and system design
• Ensure engineering excellence through clean code, testing, reviews, and automation
• Recommend technical improvements and defend design decisions with data and reasoning
• Contribute to system reliability, resilience, and observability in high-TPS environments

Core Technologies

• Strong hands-on experience with Java 8 / Java 11
• Stream API

Deep understanding of Kafka, including:

• Core concepts & messaging semantics
• Replication, reliability, and durability
• Kafka internals, infrastructure, and control

• Experience with Mongo
  
  DB (data modeling, performance, and scalability)
• Familiarity with Sonar for code quality and technical debt management
• CI/CD experience using Jenkins

• Experience with one or more of the following enterprise databases:
• Oracle DB
• Sybase IQ
• DB2

• Hands-on experience with Drools or any equivalent rules engine
• A thinker who approaches problems methodically and consultatively
• Strong focus on high-quality engineering delivery
• Ability to understand and work within the complexity and scale of NGFT systems
• Comfortable challenging ideas, recommending change, and defending decisions
• Highly collaborative team player who thrives in strong engineering cultures

• Proven experience solving high-complexity engineering problems
• Worked on critical, always-on systems with extreme scale and throughput
• Exposure to environments with very high TPS and strict reliability requirements
• Experience working alongside exceptionally strong engineering teams