John Jennings

Software Engineer

I'm a Software Engineer with expertise in Python, TypeScript, and React, specializing in building scalable ETL systems and web applications. I've worked at Unstructured.io, a Series B startup solving ETL for LLMs, where I implemented role-based access control features and contributed to their open-source library used by thousands of developers.

📧 JohnJennings702@gmail.com🐙 GitHub💼 LinkedIn

Skills & Technologies

Backend & Data

  • Python, Pytest, Pydantic, FastAPI
  • Pandas, Jupyter Notebook
  • SQL, Docker, Git
  • Azure Cloud Infrastructure

Frontend & Web

  • TypeScript, React, Node.js
  • HTML, CSS, JavaScript
  • Next.js, Remix

Tools & Platforms

  • VSCode, Postman, Jira
  • FHIR, RedCap
  • HoloLens, Jetson IoT

Testing & Quality

  • Unit & Integration Testing
  • Code Refactoring
  • API Development
  • Multi-threading & Performance

Recent Experience & Projects

Software Engineer - Unstructured.io

Jun 2023 - Apr 2025 | Remote

Series B startup solving ETL for LLMs. #24 in Fast Company's 50 most innovative companies, #1 in Data Science.

  • Implemented RBAC features using TypeScript, React, and Remix for ETL webapp platform
  • Built multi-tenant RBAC microservice optimized for 99.999% uptime, scaling for ~10k daily users
  • Enhanced open-source `unstructured` package with new file type support and language detection
  • Owned maintenance of `unstructured-langchain` package with external contributor support

Software Developer - TekSystems

Oct 2021 - Dec 2022 | Remote/Atlanta

Healthcare software development using FHIR and RedCap standards.

  • Developed Java software for secure healthcare record communication between clinical partners
  • Built analytics dashboard web applications using JavaScript and React

Python Developer - Arborian Consulting

Mar 2020 - Jun 2021 | Remote/Atlanta

Web scraping and API development for data collection and developer challenges.

  • Built multi-threading web scrapers using bs4, selenium, and pandas
  • Created REST APIs using Flask and Postman for developer challenges
  • Developed comprehensive testing suite with Pytest and unittest

GitHub Portfolio

Here's a live feed of my recent GitHub repositories, showcasing my latest code contributions and projects.

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Get In Touch

I'm always interested in new opportunities and collaborations. Feel free to reach out!

📧 Send Email🐙 View GitHub