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Sr Java Backend Developer

Company:
Concord IT Systems
Location:
St. Louis, MO
Posted:
February 18, 2026
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Description:

Sr Java Backend Developer

Altimatrik/Mastercard

St Louis, MO (Onsite from day 1)

$60/Hr on c2c ( candidate should be on your W2)

Requirement:

Strong Java developer with very good understanding of micro services.

Grasp of software engineering skills in modular design, data structures, algorithms

Deep knowledge and hands on experience with modern applications like spring boot, Angular.

Experience building and operating critical production systems

Solid understanding of modern API design and Restful principles

Fluent with git (preferred) or other SCM system

Write well designed and testable code

Strong Experience in automation and build tools like Maven, Ant and Gradle.

Bachelor's degree in computer science engineering or a related discipline, or equivalent work experience.

Experience in software development design and implementation of large scale distributed systems and web services building complex software that is testable and designed for extensibility.

Good understanding of building, deploying, and maintaining critical applications in a cloud based environment.

Work extensively with open source software capable to modify or extend code maintained as part of an open source project.

Employ both Object Orientated development skills and Systems Engineering skills.

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