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July 15, 2026
Senior Software Engineer
Senior • On-site
Chicago, IL
We are seeking a Senior Software Engineer to join a high-impact digital payments modernization program supporting the integration of a major card network into one of the largest financial institutions in the United States. This is a hands-on engineering role at the intersection of legacy and modern infrastructure, where you will contribute to both the reliability of mission-critical payment systems today and help shape the architecture that will power them tomorrow.
You will work across scalable backend services, performance testing frameworks, and application engineering with opportunities to grow your skills on modern cloud-native technologies as the program evolves.
What You'll Do
Scalability, Performance Testing & Validation
- Design and execute enterprise-grade performance testing strategies for payment processing services.
- Identify performance bottlenecks across legacy and modern service layers and drive optimization improvements.
- Instrument and validate services running on Java, Oracle, Tomcat, WebSphere, PostgreSQL, and OpenShift.
- Collaborate with backend engineers to ensure scalability requirements are met prior to release.
- Translate performance findings into recommendations for engineering leads and stakeholders.
Application Engineering
- Build and maintain backend services supporting card network integration using Java, PostgreSQL, and OpenShift Container Platform.
- Contribute to modernization and migration of services to cloud-native environments.
- Leverage AI-assisted development tooling including GitHub Copilot.
- Participate in code reviews, architectural discussions, and technical planning sessions.
General Engineering
- Support PCI data purging pipelines and event-driven architecture patterns.
- Work with event-driven services running on OpenShift with Oracle and PostgreSQL backends.
- Serve as a senior engineering contributor across multiple teams.
Required Skills & Experience
Core Engineering
- 5+ years of professional software engineering experience primarily in Java.
- Strong knowledge of Oracle and/or PostgreSQL.
- Experience deploying services in containerized environments such as OpenShift or Kubernetes.
- Familiarity with Tomcat and/or WebSphere.
Performance Engineering
- Enterprise-level performance testing experience.
- Experience with profiling, load testing, and bottleneck resolution in distributed systems.
- Ability to build streamlined test frameworks independently.
Payments & Financial Services
- Background in digital payments, card processing, or financial services technology preferred.
- Understanding of PCI compliance and secure data handling.
- Familiarity with event-driven architectures and OpenShift-based eventing.
Collaboration & Communication
- Ability to work effectively across matrixed program environments.
- Strong written and verbal communication skills.
- Comfort working with evolving requirements and ambiguity.
Nice to Have
- Experience with PGLogical or PostgreSQL logical replication.
- Exposure to AI-assisted development tools such as GitHub Copilot or Claude.
- Experience with bank or card network integration programs.
- Experience working in segregated or air-gapped development environments.
Benefits
- Competitive compensation.
- Professional development opportunities.
- Flexible work arrangements.
Education
Bachelor's Degree or equivalent combination of specialized training and progressively responsible technology experience.
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