Sean Oplinger | 3D Portfolio

Skills

C#TypeScriptSQLPythonSwiftJavaCC++ HTML/CSS.NET CoreASP.NET MVCAngularReactEntity Framework TeamCityOctopus DeployRancherAzureDockerGitPostmanOpenAI APIRAGYOLO

Work Experience

Software Engineer · SEI Investments

July 2024 — Present

Engineered and maintained a modern wire processing system handling over $1 trillion with Angular, .NET MVC, and SQL Server.
Orchestrated end-to-end CI/CD for Angular UI, .NET APIs, background services, and SQL migrations via TeamCity and Octopus Deploy.
Led infrastructure build-out across Dev, QA, UAT, Pilot, and Production with Rancher-managed containerized services.
Configured secure API gateway proxy routes for 300+ endpoints to standardize microservice communication.
Built an internal RAG chatbot using Streamlit, Azure, and OpenAI, reducing frontend development time with instant CSS guidance.
Automated QA build tracking with Python tooling, replacing manual logging and improving sprint deployment efficiency.

IMS Developer Intern · SEI Investments

June 2023 — August 2023

Refactored Angular configuration from static environment files to JSON-injected runtime variables for "Build Once, Deploy Anywhere."
Drove developer productivity strategy by introducing GitHub Copilot and ChatGPT into team workflows.
Resolved 50+ full-stack tickets across .NET Core APIs and Angular frontend components in Scrum delivery cycles.

Projects

iOS App Design and Development Team Lead

September 2019 — March 2020

Led a 25-student team building a production iOS app for Perkiomen Valley High School, integrating Google Classroom, authentication workflows, and digital ID scanning.

Swift · xCode · Adobe XD · Google API · TestFlight

CVZap — Computer Vision Bug Zapper

January 2024 — May 2024

Created a smart bug zapper using YOLO-based computer vision, Raspberry Pi processing, and a React dashboard for detection analytics and control.

Python · C · Raspberry Pi · YOLO · React · REST API

Education

Kutztown University — B.S. Computer Science (2020 — 2024)