I build the backend systems that keep data moving.

Full-stack engineer in Salt Lake City with nearly a decade in IT, from support and systems administration to production software. I write the APIs, data pipelines, and cloud automation behind business-critical applications. Open to full-stack, backend, and platform roles.

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Experience

Mar 2026 to present

Career break

Travelled through Thailand, Laos, and Vietnam. Now looking for my next engineering role.

Feb 2025 to Mar 2026

Software Engineer II, BAE Systems

Full-stack, Hill AFB, UT (hybrid)

Built and modified React front ends for internal web applications.
Wrote Node.js and Python APIs with unit tests.
Wrote stored SQL queries used dynamically by applications.

Oct 2022 to Feb 2025

Software Engineer, Overseas Military Sales Corporation

Full-stack, remote

Designed and built a web scraper that fetches, parses, and processes vendor CSV files into our systems.
Built AWS Lambdas in Python and Node.js for cron jobs, business-event reactions, API replacements, and monitoring and alerting.
Wrote Java (WildFly) APIs for data aggregation, email and SMS survey delivery, and data processing.
Updated the Angular sites to serve .webp images using a fallback hierarchy of image types, and automated conversion of the images stored in S3.
Tested with JUnit, Mocha, Python unittest, and Postman.

Jun 2022 to Aug 2022

Platform Engineer Intern, Stride Inc.

Remote

Researched, designed, built, and tested a data-reconciliation module in Java.
Wrote Serverless Framework YAML to automate deployment to AWS.
Wrote Liquibase scripts to keep a Postgres database stable.

May 2021 to Jan 2022

Software Developer Intern, Manic Kat Records

Web and mobile, remote

Designed, built, and tested a web admin site for the company's mobile app.
Fixed bugs and added features in the existing mobile app.
Established SDLC and development practices for the coding team.

2016 to 2020

Systems administration and technical support

Goldman Sachs, CSS Corp, Vantiv

Windows and Unix (RHEL) administration, scripting to automate repetitive work, and payment-system troubleshooting that included financial reconciliation.

May 2022

B.S. Computer Science, Southern New Hampshire University

Software Engineering concentration, 3.82 GPA

Skills

Languages: Java, JavaScript and Node.js, Python, SQL, Bash, PowerShell
Front end: React, Angular, HTML, CSS
AWS: Lambda, S3, CloudFront, Route 53, DynamoDB, SQS, SNS, CloudWatch, Secrets Manager, EC2
Azure: Function Apps, Cosmos DB, Artifacts
Data: Postgres, MySQL, MongoDB, DynamoDB
Practice: Unit and integration testing, API design, git, Atlassian tools, Azure DevOps, Linux, macOS, Windows

Projects

This site: static hosting for pennies

This site started on a Lightsail server running Node and Express. After looking at cost and traffic, I rebuilt it as plain HTML and CSS served from S3 through CloudFront, with DNS in Route 53. It costs far less to run and loads quickly worldwide because CloudFront caches it close to each visitor.

Earlier work

3D scene in C++ and OpenGL, with lighting, texture, and free camera control.
Inventory management system in Java with JDBC and MySQL.
Weather app in Node and Express using the OpenWeatherMap API.
Todo list with Node, Express, and MongoDB.

Contact

The best way to reach me is ianrhefflefinger@gmail.com. Outside of work I mountain bike, ski, climb, play ultimate frisbee, and am slowly learning guitar.