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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

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