pcmantz at mcpantz dot org
Experience
Workforce.com
Sept 2025 - Dec 2025
Senior Software Engineer
Chicago, IL
Worked with an international engineering department to build features for Workforce.com’s payroll and tax engine in a monolithic, multi-national application using Edge Rails (8.1) with high levels of internationalization (i18n) and localization (l10n).
Leveraged AI coding assistant technology to onboard and be productive rapidly on a new project.
Provided application support for incoming issues and implemented same-day fixes for high-priority customer issues.
Softtek
Jan 2024 - May 2025
Technical Lead
Chicago, IL
Led a near-shore team in the successful recovery and ongoing development of a critical factory floor monitoring application. We removed an unsuccessful rewrite, and restored and developed an established Ruby on Rails application. Served as the team lead and developer as well as the on-site client liaison and occasional project manager.
Led exploration meetings to discover the details of the client’s infrastructure. Assisted the initial estimation team by providing domain expertise and sharing gained knowledge.
Established agile ceremonies for the team including sprints and planning, estimation exercises, and daily standups. Built a work breakdown structure for the project, created corresponding stories in JIRA , and organized the work into sprints and epics to build timelines aligned to expected milestones.
Identified deprecated and missing integration points with external applications. Implemented these
components in multiple other languages including Rust, Bash, Python, and cmd.exe.
Designed, planned, and developed an additional dashboard for monitoring and validating machine production rates. Created technical design documents, a work breakdown structure, provided story estimates, and was the sole application developer.
Evidation Health
Feb 2021 - July 2023
Senior Software Engineer
Santa Barbara, CA (Remote)
Team Lead for Heartline: Directed many platform upgrades for a Ruby on Rails application, including a Postgres hosting shift from Heroku to AWS. Led incident response, designed and implemented features on tight deadlines that led to extra revenue. Contributed to the design of Prism, a platform for new studies.
Heartline: Designed and implemented end-of-study features. Assessed and planned dependency and infrastructure upgrades for the application. Migrated deployment from Jenkins to Github Actions.
Pi Project: Implemented repeated survey functionality for Pi, as well as other surveys and messaging features of the application.
Consumer Team: designed and led the development of Patient Reported Outcomes, a framework used to power repeating surveys used in multiple client engagements. Diagnosed and fixed an email configuration that led to 500% improvement in throughput.
Kronos, Inc.
Mar 2018 - Nov 2020
Software Engineer III
Chicago, IL
Maintained and developed EZCall, a monolithic Ruby on Rails application using MySQL for medical professional scheduling and general personnel management.
Built new customer-facing applications and backend services outside the monolith in Typescript and Node.js as well as Rails with gRPC to handle tasks such as enterprise account management, background job processing, and email delivery.
Designed and led the backend development of a new OpenAPI-integrated API within the legacy app to power a new React frontend.
Facilitated stronger SDLC practices on an internationally distributed team with story refinement, sprint planning, and work sequencing that led to better visibility and meeting tight delivery goals.
CloudMine
Jan 2017 - Jan 2018
Senior Software Engineer
Chicago, IL
Team lead for the Connected Health Cloud product, a mobile-backend-as-a-service powered by MongoDB and Ruby on Rails, supported by microservices written in Rails, Java, JavaScript, and CoffeeScript.
Designed and led development of many features around enterprise account management; including identity and access management, asset creation, and developer experience.
Built tooling around OpenAPI and Rails to enable contract-first deployment and compliance with specifications.
Led the staffing of CloudMine’s Chicago office, recruiting and onboarding the initial team.
Yello, Inc
Jan 2015 - Oct 2016
Senior Software Engineer
Chicago, IL
Designed, directed and implemented features across multiple sprints and multiple developers, including a customizable workflow engine used to track job applicants through the hiring process, as well as full-stack functionality for editing.
Led the Application Support Team, a combination of advanced troubleshooting and a SWAT team to provide hotfixes for pressing customer issues.
Developed materials for onboarding recent college graduates to the project, including curriculum, documentation, and rubrics for evaluation.
Cohesive Flexible Technologies
June 2012 - Feb 2014
Cloud Engineer
Chicago, IL
Maintained and developed the consumer front-end, as well as Virtual Appliance Machine Platform (VAMP), a platform for automating and deploying virtual machines to multiple cloud and hypervisor targets.
Extended the VAMP to allow for parameterized input, allowing for Chef or Puppet-like deployment of virtual machines to enterprise cloud platforms.
Migrated the platform from Rails 2 to Rails 3.2 across the full stack.
Bank of America
May 2010 - Jan 2012
Programmer (Contractor)
Chicago, IL
Developed and supported a distributed ETL application which collected and processed historical pricing data for use in value-at-risk (VAR) calculations throughout the organization.
Wrote composable data transforms for performing analytics on time series data using formulas collaboratively developed with quantitative analysts.
Designed and implemented Spider, a distributed map/reduce framework in Perl using ActiveMQ and memcached. Migrated jobs from the existing ETL framework to Spider which provided better introspection over the dependency graph of time series data. :::
Only most relevant history shown. Further history available on LinkedIn or by request.
Education
University of Chicago
June 2007
S.B., Computer Science
Chicago, IL
Relevant course-work: Honors Calculus (I - III), Analysis (I - III), Operating Systems, Networks, Abstract Algebra (I - III), Computer Graphics, Intro to AI (I & II), Discrete Mathematics, Algorithms, Complexity Theory, Complex Analysis, Digital Sound Modeling, Differential Equations, Databases, Computer Architecture
Texas Academy of Leadership in the Humanities
May 2003
Diploma, Magna Cum Laude
Beaumont, TX
An early admission college program for gifted high school students.
Skills
Management and Leadership: Post-Mortems, Estimation, Process Refinement, Design Documentation, Mentorship, Fact-Finding, Lateral Thinking
Project Management: Work-Breakdown Structure, Inter-Departmental Coordination, Process Refinement, Post-Mortems, Agile Methodology and Best Practices
Programming Languages: Ruby, TypeScript, JavaScript, Elixir, Rust, Bash, Perl, Makefile, LaTeX, PHP, Lisp, C
Industries: Health Care, Scheduling, Manufacturing, Operational Technology, Finance, Education, Human Resources, Recruiting
Architectures: Majestic Monolith, Monolith Decomposition, Service-Oriented Architecture, Microservices, Event-Driven Architecture, Contract-First API Design
Technologies: Infrastructure as Code, ETL Platforms, Continuous Integration / Continuous Deployment ( CI/CD ), gRPC, OpenAPI, REST
Data Stores: SQL (Postgres, Snowflake, MySQL, Sybase, SQLite, MS SQL), MongoDB, Elasticsearch, Memcache, Redis
Packaging and Deployment: Github Actions, Heroku, Docker and Docker Compose, RPM, Jenkins
Projects
Work OS
Dec 2025-Current
A dashboard for scheduling data for managers and HR professionals providing a birds-eye view of their workforce, schedules, and related expenses.
Built with Ruby on Rails 8.1, PostgreSQL, Hotwire, Stimulus.js, Tailwind, and CI/CD hosted on Heroku
Includes an AI voice assistant via xAI, with local audio worklet processing and streaming for real-time feedback and analysis of scheduling data.
Homelab
Mar 2024-Current
Home infrastructure using Ansible for IaC to manage multiple physical linux servers, VMs, and containers in a heterogeneous environment on Arch Linux, Proxmox, Docker, and Docker Compose
Managing infrastructure using Authentik, Traefik, monitoring with Prometheus and Grafana
Home automation using zigbee devices and MQTT for temperature and monitoring, motion-based lights, and ambient humidity-based humidifier control (humidistat), managed by Home Assistant
Deployment and integration of Local AI services including Whisper, Ollama, and Piper.