Eric Peterson, Authorization Developer in Culpeper, United States
Eric Peterson

Authorization Developer in Culpeper, United States

Member since June 29, 2017
Eric loves building ambitious, high-quality user interfaces, and is comfortable working anywhere in the "stack" to make that happen. Eric has truly full-stack skills from over a decade of solving problems at startups and enterprises. This includes more than writing frontend and backend code, but working with databases, infrastructure, many things called "auth," automation, testing, monitoring, etc. Eric is a proactive communicator, happy to talk to technical and business audiences.
Eric is now available for hire

Portfolio

  • UrbanSim
    TypeScript, PostGIS, Auth0, Google Cloud, Mapbox, Google Cloud Platform (GCP)...
  • MeetElise
    TypeScript, Spring, OAuth 2, Auth0, PostgreSQL, React, Java, GraphQL...
  • Cognosante
    Amazon Web Services (AWS), AWS, Serverless, GraphQL, Apollo, React...

Experience

Location

Culpeper, United States

Availability

Full-time

Preferred Environment

React, PostgreSQL, TypeScript

The most amazing...

...thing I've built is an interactive data visualization to help doctors prescribe the most effective antibiotics based on their hospital's data.

Employment

  • Full-Stack Developer, Tech Lead

    2022 - 2022
    UrbanSim
    • Led development and documentation for an app to query and visualize geospatial data. Team members said the 5 pages of engineering docs were succinct and actually helpful in getting them confident and contributing quickly.
    • Built an integration between two services, Auth0 (login) and Streamlit (data science UI development), enabling data scientists to rapidly develop an app that let clients use their corporate login, without needing help from software developers.
    • Fixed bugs quickly in a legacy application authored by employees no longer with the company.
    Technologies: TypeScript, PostGIS, Auth0, Google Cloud, Mapbox, Google Cloud Platform (GCP), Material-UI, Automated Testing, JSX, NPM, HTML5, Docker, Git, API Integration, Python, Full-stack, REST APIs, CI/CD Pipelines, Jest, Architecture, APIs, Web Development, Mapbox SDK, Python 3, Front-end
  • Senior Front-end Engineer

    2020 - 2021
    MeetElise
    • Merged two fragmented UI repositories into a single app and added many production concerns, including HTTPS, code-splitting, request tracing, code linting, a graceful fallback UI, and tracking for uncaught exceptions.
    • Merged login from two fragmented apps with some emails and hashed passwords in a PostgreSQL database, and some in AWS Cognito, into Auth0 with a "trickle migration" so no users experienced interruptions or had their passwords reset.
    • Mentored two new front-end hires, both of whom were able to get up and to run and open pull requests within their first two days. One said he learned more in one code review from Eric than he had in the last year at a previous company.
    • Refactored a legacy React app, taking it from 20,000 production and test code lines with 15% branch coverage to 13,000 production and test code lines with 79% branch coverage, without a complete rewrite and without bringing the app down to end-users.
    • Implemented relationship-based access control (ReBAC) appropriate for B2B SaaS, with an authorization model including internal admins, tenant organizations, parent-child resources, and client users with various roles.
    • Built an embeddable UI widget with telemetry and consumer-grade animations, with a total bundle size under 10kb minified and gzipped size.
    • Built client onboarding tools in Retool and trained customer success to continue creating their tools, reduced onboarding time in half, and freed the small engineering team from internal tools to focus on client-facing features.
    • Added OpenAPI 3.0 schema to API and automatically generated and published SDK when the schema changed.
    Technologies: TypeScript, Spring, OAuth 2, Auth0, PostgreSQL, React, Java, GraphQL, Authorization, Bootstrap, AWS S3, Prisma, CSS, Automated Testing, JSX, NPM, HTML5, Git, API Integration, Redux, Full-stack, Azure, REST APIs, CI/CD Pipelines, Jest, Spring Boot, APIs, Web Development, AWS Lambda, Front-end
  • Full-stack Developer

    2017 - 2020
    Cognosante
    • Developed modern web applications for healthcare providers and hospital administrators. Integrated modern technology and paradigms like serverless, React, and OpenID with legacy healthcare systems.
    • Fixed race conditions and other tricky bugs so things could "just work" in all browsers.
    • Mentored team members in the new SharePoint Framework, which emphasizes React, TypeScript, and modern DevOps practices. Brought an intranet used by 1,700+ people into the present.
    • Presented at a developer brown-bag session, showing how to use debugging tools on front- and back-end code simultaneously.
    • Trained a team on how to write unit tests for a React application.
    Technologies: Amazon Web Services (AWS), AWS, Serverless, GraphQL, Apollo, React, PostgreSQL, Express.js, Bootstrap, AWS S3, CSS, React Redux, JSX, NPM, HTML5, Git, API Integration, Charting, JavaScript Charting, Redux, Full-stack, REST APIs, Jest, APIs, Web Development, AWS Lambda, NoSQL, Front-end
  • Full-stack Developer

    2015 - 2017
    The Sanford Guide
    • Reduced the odds that the human race will be wiped out from super-bacteria by designing and building an interactive data visualization to help hospitals use antibiotics effectively, currently used by clinical decision-makers around the globe.
    • Mentored team members in Node.js and led the creation of an OAuth 2.0 and REST API server for secure authentication and interaction from the web and mobile apps.
    • Maintained six Android applications from a single codebase with the ability to roll out new features quickly for some or all apps.
    • Hacked Google Sheets into a CMS, which resulted in getting hugs from a medical doctor who no longer had to play the "Which email has the latest version of the Spreadsheet?" game.
    • Performed many roles traditionally fulfilled by IT operations (due to the company's small size)—including server provisioning and hardening, round-the-clock emergency resolution, and database administration.
    • Happily communicated technical concepts and their business impact to non-technical management in plain English.
    Technologies: Python, WordPress, Plone, PHP, Android, React, Node.js, JavaScript, Java, Express.js, Bootstrap, AWS S3, CSS, React Redux, JSX, NPM, HTML5, Git, Charting, JavaScript Charting, Redux, Full-stack, REST APIs, CI/CD Pipelines, MySQL, Architecture, APIs, Web Development, Mobile, Front-end
  • SAP Developer

    2012 - 2015
    Babcock & Wilcox Enterprises
    • Developed and maintained business applications used daily by project management, warehouse management, accounting, and human resources.
    • Refactored a complex timekeeping application to eliminate 16 hours per week of manual accounting work.
    • Built great relationships by collaborating with the end-users.
    Technologies: JavaScript, ABAP, SAP

Experience

  • Safety Shuttles
    https://app.safetyshuttles.com/oceanside

    A progressive web app for riders of a shuttle van to buy passes and catch a ride to local breweries. Includes a full SaaS platform for managers of a shuttle van or bus to sell tours, edit routes, and manage drivers.

    I was the solo developer. I wrote the rider UI (installable as an app), as well as the manager portal, payment processing integration, QR code passes emailed to riders, and driver app to scan QR passes and provide real-time bus location.

    The link shows the rider app with real-time shuttle location and link to buy tickets. The UI is very simple. If I had more time to spend, it would be even simpler.

  • Share Memorial
    https://sharememorial.com/

    This is a data/map visualization project to view all US traffic fatalities (since 2001) using public data. I used a Jamstack architecture so this does not need a back end. The data is compiled by the US government and pre-processed by me into static files loaded by the UI.

  • ABAP Logger
    https://github.com/epeterson320/ABAP-Logger

    ABAP Logger is a library I open-sourced back when I was doing enterprise application development on SAP's platform. It's now the third most-starred ABAP project on GitHub.

  • Codeck | Web
    https://codeck.ericp.co

    An interactive pop-cryptography app that allows a user to encode and decode a short message into and from a deck of cards.

    Technologies: D3.js, Webpack, HTML, Sass, Jest (for unit testing), originally CircleCI for continuous integration and deployment to GitHub Pages, now Netlify for CI and hosting.

    The code is available at GitHub.com/epeterson320/codeck.

  • Triangle Calculator | Web
    https://triangle-calculator.ericp.co/

    A small web application that was written in React.js to solve a triangle based on incomplete data and display the shape of the triangle to the user.

    Technologies I used: React, Webpack, Redux, Sass, Jest (for unit testing) originally CircleCI for continuous integration and deployment, now Netlify for CI and hosting.

    The code is available at GitHub.com/epeterson320/triangle-calculator.

  • Occam's Flashlight | Android
    https://github.com/epeterson320/flashlight

    Deliberately not much to look at, I wanted to try out a CI workflow for Android, where as soon as I push code to source control, it's automatically tested against a suite of unit and integration tests.

    I wanted to do this with a small app since for this project I was more concerned with process than results. The app itself is what I ended up naming "the simplest possible flashlight."

  • Antimicrobial Therapy, Inc. | Android Apps
    https://play.google.com/store/apps/developer?id=Antimicrobial%20Therapy%2C%20Inc.&hl=en

    These are a family of Android apps that help doctors and hospitals make good decisions at the point of care. They're content-heavy and contain interactive features and tools that aren't possible in an eBook format.

    Work Done:
    • Rolled all of the apps into one codebase with shared core features.
    • Corrected concurrency errors, bringing app launch from 3 seconds to 0.2 seconds.
    • Optimized a slow SQLite full-text search query to be blazing fast.
    • Added additional features requested by customers.

Skills

  • Languages

    TypeScript, CSS, HTML, JavaScript, Google Apps Script, HTML5, Java, ABAP, GraphQL, PHP, Python, Scala, Python 3
  • Frameworks

    Express.js, OAuth 2, Redux, Jest, Plone, React Native, Selenium, Bootstrap, Spring, Akka, NestJS, Deck.gl, Material-UI, Spring Boot
  • Libraries/APIs

    Node.js, React, React Redux, JavaScript Charting, REST APIs, D3.js, Stripe, Google Maps, Stripe API
  • Tools

    React Apollo, Auth0, JSX, NPM, Git, SendGrid, Prisma
  • Paradigms

    Automated Testing, Functional Programming, Functional Reactive Programming, Actor Model, Jamstack
  • Storage

    AWS S3, NoSQL, PostgreSQL, PostGIS, Google Cloud, Cloud Firestore, MySQL
  • Other

    Writing & Editing, Authorization, Full-stack, AWS, API Integration, Charting, CI/CD Pipelines, Architecture, APIs, Web Development, Front-end, Apollo Server, Mapbox SDK, SAP, Apollo, Engineering, QR Codes, Geolocation
  • Platforms

    Amazon Web Services (AWS), Android, Mapbox, Docker, AWS Lambda, WordPress, Azure, Google Cloud Platform (GCP), Mobile

Education

  • Bachelor's Degree in Industrial and Systems Engineering
    2007 - 2011
    Liberty University - Lynchburg, VA, USA

Certifications

  • Reactive Programming in Scala
    AUGUST 2015 - PRESENT
    École Polytechnique Fédérale de Lausanne

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