Demo

Senior Software Engineer (Backend Focus)

Medinext Global LLC
Fallon, MO Contractor
POSTED ON 4/25/2026
AVAILABLE BEFORE 5/25/2026

Position Title 

 Senior Software Engineer (Backend Focus)

 

Requisition Date

4/22/2026 1:00:19 PM

 

No. of Position(s)

1

 

Last Updated On

4/24/2026 12:59:08 PM

 

Job Location

O Fallon, MO, USA

 

Covered

No

 

Bill Rate Range

65/hr C2C

 

Employment Type

Temporary

 

Estimated Duration (In Months)

13

 

Work Model

Hybrid

 

Must have Skills/Attributes

JavaScript, PHP, Python, Software Development

 

Shift

Standard work hours. Off hours support may also be required at times.

 

Nice to have Skills/Attributes

 

 

Right To Represent

TA Notes

Industry: Payments
Be competitive on C2C rate based on candidates skills & experience!

Glider Test Required - please send submittal with candidate''s email and we will send them the Glider test direclty if qualified.

Requirements:
- Extensive knowledge and experience with Java, Spring Boot, gRPC
- 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.

 

 

***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.

 

Salary : $60 - $65

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