Date Posted: 04/22/2026
Hiring Organization: Rose International
Position Number: 500176
Industry: Financial Services
Job Title: Senior Software Engineer (Backend Focus)
Job Location: O Fallon, MO, USA, 63368
Work Model: Hybrid
Work Model Details: Onsite Mon, Tues, every other Fri.
Shift: Standard work hours. Off hours support may also be required at times.
Employment Type: Temporary
FT/PT: Full-Time
Estimated Duration (In months): 13
Min Hourly Rate($): 70.00
Max Hourly Rate($): 80.00
Must Have Skills/Attributes: JavaScript, PHP, Python, Software Development
Experience Desired: Experience with Java, Spring Boot, gRPC (7+ yrs); Knowledge in creation and working with CI/CD pipelines using Jenkins (5+ yrs); Experienced in event driven systems (ActiveMQ, Apache Kafka, NATS, etc) (6+ yrs); Experienced in building platforms with Microservice architecture and RESTful APIs. (6+ yrs); Experience using cloud-native approaches running on Linux, leveraging Spring Boot (6+ yrs)
Required Minimum Education: Bachelor’s Degree
Job Description
***Only qualified Senior Software Engineers located near O’Fallon, Missouri area to be considered due to the position requiring hybrid presence. ***
Preferred Education:
- Bachelor's Degree in a technical-related field
Required Skills, Experience, & Abilities:
- Expert level of Java, Springboot
- Event Driven Architecture experience
- gRPC experience
- Extensive knowledge and experience with Java, Spring Boot, gRPC
- Ability to understand larger upstream/downstream data flows.
- Ability to communicate technical and data mapping details effectively in larger forums with people inside and outside our group.
- Engineering experience, preferably in high volume, low latency transaction processing systems (such as payments transaction switching, high frequency trading systems or global real-time event streaming systems etc.)
- Experience in CI/CD pipeline creation via Jenkins.
- Delivered scalable products through a CI/CD pipeline deploying on-prem or in a public cloud infrastructure.
- Ensure quality across the full stack via rigorous CI/CD practices in all aspects of the SDLC (Builds, Test, and Deploy).
- Strong writing and verbal communication skills
Desired Skills:
- Good knowledge in creation and working with CI/CD pipelines using Jenkins
- Experienced in event driven systems (ActiveMQ, Apache Kafka, NATS, etc)
- Experience in financial system encryption (PIN Blocks, CHIP, CVC) would be beneficial
- Experience with testing frameworks and methodologies (Gtest, JUnit, BlazeMeter, mocking, etc.)
- Experienced in building platforms with Microservice architecture and RESTful APIs.
- Experience using cloud-native approaches running on Linux, leveraging Spring Boot
- Exposure to symmetric cryptography would be desired.
- Experience with virtualization like Cloud Foundry (PCF), Kubernetes (EKS), Docker etc.
Role:
- Providing Innovative, Secure, and Reliable Switching Solutions is the lifeblood of the client's Core Products, we are currently seeking a passionate, collaborative, and experienced software engineer to join the Payment Networks Team.
Responsibilities:
- Ensure quality of one or more application codebases and alignment with development standards.
- Provides input into design of automation for full infrastructure deployment; manages review of and tests for compatibility and integration processes needed to connect with other devices
- Automates large scale systems spanning multiple locations and environments.
- Writes code automating public cloud, private cloud, and bare metal.
- Automates common tasks, deploy with an IaaS model, utilizing chef, ansible, or similar
- Ability to write moderately complex scripts and programs for automation, tools, frameworks, dashboards, alarms. (common uses: Python, Perl, PHP, JavaScript, Go).
- Orchestrates the deployment/maintenance of complex applications.
- Responsible for performance engineering of the enterprise software architecture.
- Significant code development, commitment of code/review of pull-requests, and modest day-to-day support duties.
Benefits:
For information and details on employment benefits offered with this position, please visit here. Should you have any questions/concerns, please contact our HR Department via our secure website.
California Pay Equity:
For information and details on pay equity laws in California, please visit the State of California Department of Industrial Relations' website here.
Rose International is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, sexual orientation, gender (expression or identity), national origin, arrest and conviction records, disability, veteran status or any other characteristic protected by law. Positions located in San Francisco and Los Angeles, California will be administered in accordance with their respective Fair Chance Ordinances.
If you need assistance in completing this application, or during any phase of the application, interview, hiring, or employment process, whether due to a disability or otherwise, please contact our HR Department.
Rose International has an official agreement (ID #132522), effective June 30, 2008, with the U.S. Department of Homeland Security, U.S. Citizenship and Immigration Services, Employment Verification Program (E-Verify). (Posting required by OCGA 13/10-91.).
I am very happy with the Rose International, and the professionalism of the employees.
Robin, Consultant
Rose International was not only attentive and responsive, but they were very professional and helpful whenever I called or needed any assistance.
Diane, Consultant
It is a great pleasure being a part of the Rose International Team.
Toni, Consultant
Working for Rose International was the most pleasant assignment I have ever had. They were always on top of situations when necessary, and very helpful. I was very proud to be an employee of Rose International, and would recommend anyone to try to work with them.
Melvon, Consultant
It was great working for Rose International. Everyone was extremely helpful.
Rosann, Consultant
EMPLOYEE COMMENTS