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Senior Software Engineer

O'Fallon, Missouri💼 Full-time💰 $115,000–$115,000🗓 2026-09-14 → 2026-09-26

Core

Design, develop, and maintain highly available, distributed Java-based backend services for secure account change communication in payment systems.

Role type

Senior Software Engineer (Backend)

Builds

Distributed backend services for credential-on-file and recurring payments

Domain

Fintech / Digital Payments

Deliverable

production ML models | product features

Required skills

Java, Spring Boot, Spring Integration, gRPC, REST/SOAP, Apache Kafka, Oracle/SQL, AWS, Pivotal Cloud Foundry, Jenkins, Bitbucket, GitHub, Atlassian suite

Preferred skills

AI-assisted development tools (GitHub Copilot, Claude Code), Domain-Driven Design

Technologies

Java, Spring Boot, Spring Integration, gRPC, Apache Kafka, Oracle, SQL, AWS, Pivotal Cloud Foundry, Jenkins, Bitbucket, Artifactory, GitHub, Atlassian suite

Responsibilities

Design and develop Java-based backend services; Translate business requirements into secure software solutions; Contribute to technical design and architecture decisions; Create and maintain automated tests; Analyze application performance and implement optimizations; Conduct code reviews and mentor junior members; Troubleshoot complex issues in distributed systems; Support operational readiness through monitoring and observability

Seniority

Senior, hands-on IC

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