Java Backend Engineer

Quantum Technologies. LLC; Missouri; On-site; USD 120,000 - 180,000; Full time

Job summary

Quantum Technologies. LLC in Missouri is seeking an experienced software engineer with 7–12 years in designing software solutions using Java, J2EE, PostgreSQL, and microservices.

You will work with REST and SOAP web services, Spring Boot, Spring MVC, Hibernate/JPA, API Gateway, and Azure, driving integration, migrations, and architecture. The role requires hands-on development, strong problem-solving, and ability to work independently under pressure.

Qualifications

• Must have Java/J2EE, databases (Postgres), REST/SOAP, Spring boot, Spring MVC, Hibernate/JPA, API Gateway, Azure, Microservices.

Job description

Work Authorization: USC, GC, H-1B, OPT-EAD, GC-EAD, H4-EAD

JOB SUMMARY

• Good hands-on in Java, J2EE, Databases (Postgres), Web Services (REST, SOAP), Spring boot, Spring MVC, Spring 4.0, Hibernate/JPA, API Gateway, Azure and Microservices.
• 7-12 years of experience desired in designing software solutions using software architecture design principles.
• Payment domain expertise and ability to drive the team, integrations, migrations, and create approach.
• Good to have experience in Angular, and front-end technologies.
• Understanding of Kafka, Integration patterns, Security standards, Concurrency and Multi-threading, Collections, PostgreSQL, Azure, Docker, Kubernetes
• Hands-on, high-energy, detail-oriented, proactive, and able to function independently under pressure.
• Strong Problem-Solving skills.
• API and Contract Testing using REST Assured/Postman/Swagger/SOAP UI + Groovy/Spring Cloud Contract
• Test Driven Development TDD Methodology and Unit Testing using Junit/XCTest
• Use of mocking frameworks such as API Service Virtualization/Mockito/OCMock
• Static Code Analysis using SonarQube/Xcode Static Analyzer
• Hands on with Jenkins/PCF or similar tools for automated provisioning of build and test infrastructure.
• Troubleshooting with Splunk, API aids like Swagger/Postman and source control systems like Git
• Intermediate knowledge of Maven, Junit, Redis, Oracle database, SQL, Unix command, Shell scripting.
• Good knowledge of tools like Sonar, Data-dog/Dynatrace, GIT, SVN, Rally/Jira, CI (Jenkin / Bamboo)/CD, Splunk
• Strong communication skills -- both verbal and written – with strong relationship, collaborative skills, and organizational skills
• Proven experience in Agile methodology, SDLC, & implementation of Projects, debugging applications.

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.