Senior Java Software EngineerInRhythm • St Louis, MO, US

Senior Java Software Engineer

InRhythm • St Louis, MO, US

13 days ago

Job type

Full-time

Job description

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.

Key Responsibilities

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

Technical Requirements

Core Technologies

Strong hands-on experience with Java 8 / Java 11

Lambda expressions

Stream API

CompletableFuture & async programming

Deep understanding of Kafka, including : -

Core concepts & messaging semantics

Replication, reliability, and durability

Kafka internals, infrastructure, and control

Data retention strategies

Experience with MongoDB (data modeling, performance, and scalability)

Familiarity with Sonar for code quality and technical debt management

CI / CD experience using Jenkins

Databases

Experience with one or more of the following enterprise databases :

Oracle DB

Sybase IQ

DB2

Rules Engines

Hands-on experience with Drools or any equivalent rules engine

Cultural Expectations

A thinker who approaches problems methodically and consultatively

Strong focus on high-quality engineering delivery

Craftsman mindset — pride in clean, readable, maintainable code

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

Ideal Background

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

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Senior Java Software Engineer • St Louis, MO, US

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