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Senior Software Engineer

O'Fallon, Missouri💼 Full-time🗓 2026-09-17 → 2026-09-26

Core

Design, build, test, deploy, and support business-critical payment gateway applications at scale, embedding reliability engineering practices.

Role type

Senior Software Engineer (Backend/Full-Stack)

Builds

Globally deployed payment gateway products and scalable backend services

Domain

Financial Services / Payments

Deliverable

production ML models | product features

Required skills

Java 17+, Spring Framework, Spring Boot, Software Design & Architecture, Unit/Functional/Integration Testing, Modern Front-end Frameworks (React/Angular/Vue), Observability Tools (Dynatrace/Datadog/Splunk), CI/CD Automation, Cloud Platforms, Troubleshooting & Root Cause Analysis

Preferred skills

Docker, Kubernetes, PCF, AWS/Azure, Infrastructure as Code (Terraform/Ansible), Python/Bash Scripting, OWASP/PCI DSS knowledge

Technologies

Java, Spring Boot, React, Angular, Vue, Dynatrace, Datadog, Splunk, Grafana, Jenkins, Artifactory, Kubernetes, PCF, AWS, Azure

Responsibilities

Design and develop large-scale distributed software applications; Create and maintain comprehensive test suites; Perform code reviews and provide technical mentorship; Troubleshoot complex system issues and implement sustainable solutions; Design and maintain observability solutions; Drive CI/CD and automation improvements; Support applications in public and private cloud environments

Seniority

Senior, hands-on IC with mentorship responsibilities

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