Sr Software Engineer

Powering the world’s payments ecosystem

ACI powers the payments ecosystem – globally, and you power ACI. You’ll innovate, collaborate, and grow – in an energetic technology culture with decades of proven success. ACIers – in all roles and levels – are truly your colleagues and many are your friends. Our size and reach allow you to see the global impact of your work. You are visible, your talents are valued, and you are empowered to shape the future of payments.

As a Sr Software Engineer in Norcross, GA or Omaha, NE
, you will join a diverse, passionate team, dedicated to powering the world’s payments ecosystem!

The Senior Software Engineer designs and architects complex software features and systems. This senior technical position leads technical discussions, drives engineering best practices, mentors engineers, and makes critical architectural decisions that impact product quality and team productivity.

• Design and architect complex features and systems with scalability in mind
• Lead technical discussions and make architectural decisions for team projects
• Drive best practices for code quality, testing, and software craftsmanship
• Conduct design reviews and provide technical guidance to team members
• Champion adoption of AI-powered tools and best practices across the team

• Develop high-quality, maintainable code for complex features
• Optimize application performance and resolve scalability bottlenecks
• Lead incident response and troubleshooting for critical production issues
• Implement comprehensive testing strategies including unit, integration, and end-to-end tests

• Mentor junior and mid-level engineers on technical skills and best practices
• Collaborate with product, design, and engineering teams on product strategy
• Conduct technical interviews and participate in hiring decisions
• Share knowledge through documentation, tech talks, and code reviews

• Bachelor's degree in Computer Science, Software Engineering, or related field;
  Master's preferred
• Equivalent experience (7+ years) may substitute for degree

• 5-8 years of professional software development experience
• Proven track record of leading technical projects and delivering complex systems
• Experience mentoring engineers and influencing technical direction
• Payments, financial services, or regulated industry experience preferred

• Expert proficiency in multiple programming languages and frameworks
• Deep understanding of software architecture patterns and design principles
• Experience with distributed systems, microservices, and event-driven architectures
• Strong system design and scalability expertise
• Knowledge of application runtime environments and underlying infrastructure platforms
• Performance optimization and debugging experience at scale
• Talented use of AI tools and integration of AI/ML capabilities into applications
• Programming
  
  Languages:
  
  Java, J2EE, and Python
• Frameworks & Architecture:
  Microservices, Spring Boot
• API Development: REST API
• Testing & Tools:
  Postman
• Databases:
  Oracle & PostgreSQL
• CI/CD Tools:
  Jenkins, and Azure Pipelines
• Containerization & Orchestration:
  Docker and Kubernetes
• Cloud Platforms: AWS (EC2, SR, and Lambda)
• Work Management Tools:
  Azure Dev Ops, and Confluence
• AI Tools:
  Claude and Microsoft Copilot

• Frontend Technologies:
  Angular
• Monitoring & Observability:
  Prometheus and Grafana
• Messaging & Streaming:
  RabbitMQ

• Excellent technical communication and presentation skills
• Strong leadership and mentorship abilities
• Strategic thinking and problem-solving capabilities
• Cross-functional collaboration and influence

• Experience with large-scale distributed systems and high-traffic applications
• Conference speaking or technical blog with significant following
• Advanced certifications in relevant technologies
• Experience with security best practices and secure software development

• Hybrid work model (2-3 days in-office); multiple office locations available
• 5-10% travel for conferences, training, or cross-team collaboration
• On-cal…