Software Engineer Portfolio

Sean Oplinger

sean@soplinger.com · (215)-407-5097 · Sanatoga, PA

Building high-impact fintech systems, AI-driven developer tools, and production-grade full-stack products.

Explore Projects

Skills

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

Work Experience

Software Engineer · SEI Investments

  • 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

  • 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)