Eric Krohnfeldt
Résumé PDF

Work / Engineering case studies

Selected Work

Case studies from healthcare platforms, manufacturing systems, developer tooling, cloud infrastructure, and independent agentic-development research.

Production platform capability

Resilient Event Processing

A reusable event-processing framework that improved resilience to asynchronous and out-of-order events and gave distributed services a consistent engineering approach.

Problem
Service-specific handling of common event-ordering concerns made the system harder to reason about, test, and maintain.
Role
Architecture, implementation, adoption, and developer guidance

Evidence

  • Improved resilience to asynchronous and out-of-order events.
  • Replaced service-specific solutions with a consistent engineering approach.
  • Made common event-ordering behavior easier to test and maintain.
  • Provided a reusable model and guidance for participating teams.
Examine the event-processing system
Production developer platform

Microservice Platform Standardization

Centralized Maven parent POMs and reusable Git templates reduced duplicated Spring Boot configuration and created a maintainable source of truth.

Problem
Shared dependencies and configuration files had drifted over time and lacked a reliable source of truth.
Role
Architecture, implementation, migration, and automation

Evidence

  • Centralized Maven parent POMs.
  • Created reusable Git templates.
  • Reduced dependency and configuration drift.
  • Simplified shared maintenance updates.
  • Moved existing services to the shared foundation incrementally.
Examine the platform foundation
Independent R&D project

Agentic Software Development Platform

A controlled environment in which AI development agents perform ticket-driven implementation through the same branch, pull-request, CI, and review workflow used by human developers.

Problem
Unrestricted code generation does not provide branch discipline, repeatable validation, source-control safety, review participation, or accountable human approval.
Role
Architecture, implementation, operations, workflow design, and ongoing research

Evidence

  • Agents implement ticketed work, validate it, commit, push, and open structured pull requests.
  • Git and Forgejo operations are limited to approved policy-enforcing commands.
  • Agents retrieve review comments, apply corrections, rerun checks, and request re-review.
  • The workflow is used across more than a dozen projects, including dozens of merged pull requests that built and improved the platform itself.
Examine the agent workflow
Production manufacturing system

Assembly-Line Control System

An end-to-end assembly-line control platform spanning physical equipment inputs, technician interfaces, application services, databases, reporting, virtualization, servers, and networks.

Problem
The legacy system required stabilization and replacement because unplanned downtime carried significant financial penalties.
Role
End-to-end architecture, development, infrastructure specification, installation, integration, and production support

Evidence

  • Designed the application, database, virtualization, server, and network infrastructure as one integrated operating environment.
  • Integrated automated guided carts, torque tools, and physical equipment inputs.
  • Implemented VMware infrastructure and high-availability network failover.
  • Diagnosed first-release database deadlocking and delivered a stable second implementation.
Examine the control system
Production shared platform capability

RTLS Processing and Reporting Services

Shared RTLS processing and reporting services supporting healthcare workflows in an event-driven environment.

Problem
Asynchronous RTLS events needed to support workflow context, including the next expected workflow step, without exposing raw integration details to every consumer.
Role
Architecture and implementation

Evidence

  • Implemented shared RTLS processing services.
  • Handled asynchronous events through a consistent service design.
  • Provided application-ready workflow context.
  • Provided a shared boundary for related reporting needs.
Examine the RTLS services

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