Andrew Hetzler, D. Tech
Professional Summary
With over 15 years of experience in software engineering, architecture, and engineering management, combined with a Doctor of Technology from Purdue University, I bring a unique blend of technical depth, strategic leadership, and forward-looking innovation, particularly in areas such as payments, cybersecurity, and connected vehicle systems.
Professional Experience
Kroger
Advanced Software Engineering Manager
2022 — Present Day | Cincinnati, OH
- Leads an organization of 35+ engineers and QA across full-time employees and consultants, driving execution of multi-year, large-scale payment modernization initiatives generating $100M+ in new revenue opportunities
- Architects and oversees the development of a cloud-native, event-driven omnichannel payments platform supporting in-store and e-commerce systems, reducing PCI scope and improving scalability, resiliency, and fault tolerance
- Designs and implements distributed fraud detection and prevention systems across the transaction lifecycle, leveraging real-time decisioning to reduce fraud losses by $10M+
- Establishes engineering standards and platform capabilities, including CI/CD pipelines, infrastructure as code, and automated testing frameworks, improving system reliability, deployment frequency, and consistency across teams
- Defines system architecture and integration patterns for high-volume payment processing, including RESTful microservices, asynchronous messaging, and transactional integrity across distributed systems
- Mentors senior and staff engineers on advanced system design, domain-driven design principles, and performance optimization, elevating technical depth and architectural rigor across the organization
Advanced Software Engineer
2020 — 2022 | Cincinnati, OH
- Architected and led development of a high-throughput payment gateway, ensuring transactional integrity and supporting scalable, fault-tolerant processing
- Designed and implemented a fraud review queue for manual verification of flagged transactions, reducing checkout friction while strengthening fraud controls
- Developed and optimized backend services and APIs to support secure, low-latency payment processing across distributed systems
- Implemented robust error handling, monitoring, and recovery mechanisms to improve system reliability and operational visibility
Notable Achievement
Designed and implemented SNAP EBT payment processing within a newly architected gateway,
enabling compliant transaction handling and unlocking a $1B revenue opportunity.
Senior Software Engineer
2017 — 2020 | Cincinnati, OH
- Engineered and led development of backend services for Kroger Pay, enabling scalable, secure mobile payment processing across enterprise systems
- Designed and implemented real-time payment processing capabilities, enabling same-day fund settlement and improving cash flow operations
- Developed and optimized RESTful microservices supporting high-volume transaction processing with strong performance and reliability standards
- Integrated payment systems with external processors and internal platforms, ensuring secure, seamless transaction flows
- Improved system resiliency through enhanced error handling, monitoring, and fault tolerance across distributed services
- Collaborated with cross-functional teams to define technical requirements and deliver new payment features aligned with business objectives
Notable Achievement
Designed and implemented real-time payment processing capabilities, enabling same-day fund
settlement and improving cash flow operations.
Nox Solutions
Backend and Infrastructure Developer
- Engineered scalable AWS infrastructure for 20+ clients, reducing operational costs by 30% through optimized resource utilization
- Built and maintained cloud-native environments with a focus on reliability, security, and performance
- Developed a reverse checkout system enabling “try before you buy” functionality, supporting flexible transaction workflows
- Created the “Nox Watch” monitoring platform to track service health, automate remediation, and reduce support workload by 90%
- Implemented automation for deployments, monitoring, and recovery, improving system stability and operational efficiency
Franklin City Schools
Network Administrator
2008 — 2014 | Franklin, OH
- Developed software fixes for Citrix issues affecting Mac users, improving system reliability
- Supported and maintained a dual-platform K–12 network environment
- Transitioned into software engineering during tenure
Notable Achievement
System server migration from Lotus to Microsoft Exchange Server
Education
- Purdue University
Doctor of TechnologyDissertation: Building a compliant and interoperable blockchain architecture for U.S. connected and automated vehicles
2025 - The Pennsylvania State University
Master of Software Engineering2019 - University of Phoenix
Bachelor of Science — Information Technology2013
Skills
- Amazon Web Services
- Azure
- Cassandra
- CosmosDB
- CSS
- Docker
- Engineering Management
- Git
- Github
- Gitlab
- Gradle
- HTML
- Hyperledger Caliper
- Hyperledger Fabric
- Java
- Javascript
- jUnit
- Kotlin
- Leadership
- Microservice Architecture
- Microsoft SQL Server
- MySQL Server
- Pivotal Cloud Foundry
- PostgreSQL
- REST
- Software Engineering
- Spring Boot
- Spring Cloud Stream
- Spring Data
- Spring Security
- Spring WebMVC
- Swift
- SwiftUI