Evan Hellmuth, Chrome Extensions Developer in San Francisco, CA, United States
Evan Hellmuth

Chrome Extensions Developer in San Francisco, CA, United States

Member since January 29, 2019
After graduating from Yale, Evan joined Salesforce to build products used by companies like Coca-Cola, Fitbit, and FedEx. Afterward, he helped grow revenue to eight figures as employee #20 at Mixmax before founding his own startup. Evan's varied experience has given him the skills to deliver beautiful, maintainable, and scalable web solutions quickly. He loves digging into problems to help businesses delight customers and grow.
Evan is now available for hire

Portfolio

  • Freelance
    Node.js, React, MongoDB, JavaScript, HTML, CSS, Chrome Extensions, Slack Bots...
  • Mixmax
    React, Node.js, MongoDB, LESS, Chrome Extensions
  • Salesforce
    JavaScript, HTML, CSS, Java, SQL, Python, Splunk, Jenkins, Salesforce

Experience

  • JavaScript, 5 years
  • Node.js, 4 years
  • Salesforce API, 4 years
  • REST, 4 years
  • MVC Design, 4 years
  • React, 4 years
  • MongoDB, 3 years
  • Chrome Extensions, 3 years

Location

San Francisco, CA, United States

Availability

Part-time

Preferred Environment

macOS, Git, Sublime Text, iTerm, Coffee

The most amazing...

...growth feature I've built drove thousands of new signups by allowing recipients of a scheduling email to see their availability without opening their calendar.

Employment

  • Full-stack Web Consultant

    2018 - 2019
    Freelance
    • Fixed a broken data analytics pipeline that scraped web data using Selenium, uploaded the results to AWS S3 and RDS, then ran analytics on a Django server and through third party APIs, and populated dashboards written in Node.js and React.
    • Shipped a Slack bot written in Node.js that responded to slash commands and offered an interactive chat-based UI.
    • Deployed a Zillow-like Google Maps integration in Node.js and React.
    • Built several RESTful APIs.
    • Worked with a variety of databases including MongoDB and MySQL.
    • Implemented several technical and nontechnical SEO improvements.
    • Built, deployed features, and fixed bugs for various chrome extensions.
    • Created a full MVP single-page app.
    Technologies: Node.js, React, MongoDB, JavaScript, HTML, CSS, Chrome Extensions, Slack Bots, Chatbots, TypeScript, SEO, Amazon S3, Heroku, Selenium, Django, Python
  • Software Engineer

    2018 - 2018
    Mixmax
    • Designed and deployed React components along with Node.js APIs and MongoDB collections to populate them.
    • Shipped third-party OAuth API integrations with services such as Google Calendar, Zoom.us, and GoToMeeting.
    • Implemented a viral growth feature that resulted in thousands of new signups within two weeks.
    • Caught and fixed a severe cross-site request forgery bug that could have been used to grant public access to privately shared emails.
    • Deployed code with Amazon Elastic Beanstalk.
    • Managed Redis instances to share state between microservices.
    Technologies: React, Node.js, MongoDB, LESS, Chrome Extensions
  • Software Engineer

    2015 - 2018
    Salesforce
    • Identified and fixed performance bottlenecks, reducing average page load time from two seconds to .7 seconds and increasing NPS by 12 points.
    • Instrumented UI components to log user interactions to Splunk.
    • Built a data pipeline to populate an internal Salesforce org with user and performance metrics pulled from Splunk.
    • Designed and deployed a custom real-time dashboard so non-technical stakeholders could gain insights from telemetry data without the help of an engineer.
    • Refactored a UI component to be generic, allowing it to integrate with eight additional Salesforce products.
    • Shipped a suspend/resume feature for a real-time queue that syncs terabytes of data/day between the businesses’ Salesforce orgs.
    • Rewrote an eight-page server-side rendered app into a single-page app.
    • Triaged tasks and planned sprints as scrum master for an Agile team of eight software engineers.
    • Shipped a Salesforce AppExchange app as part of a company hackathon.
    Technologies: JavaScript, HTML, CSS, Java, SQL, Python, Splunk, Jenkins, Salesforce
  • CS50 Teaching Assistant

    2015 - 2015
    Yale University
    • Organized and judged a joint Harvard-Yale hackathon.
    • Taught weekly hour-long sections on computer science fundamentals for 16 Yale University students.
    • Helped students debug at office hours twice a week.
    • Graded problem sets, tests, and projects.
    Technologies: JavaScript, HTML, CSS
  • IT Security Engineer

    2014 - 2014
    Louisville Gas & Electric
    • Penetration-tested to ensure a secure rollout of a new network infrastructure.
    • Wrote and deployed Python scripts to identify malicious IP addresses and periodically add them to the external firewall's blacklist.
    • Worked with iptables to manage firewalls on various network devices.
    • Analyzed suspicious network traffic using WireShark.
    • Remotely installed, configured, tested, and used the malware analysis software Cuckoo Sandbox on an Ubuntu server quarantined from the company intranet.
    • Rewrote regular expressions to improve the efficacy of the intranet intrusion detection system by excluding warnings from redundant or unnecessary sources such as temporary files created by a browser.
    Technologies: Python, Ubuntu Server, iptables, Wireshark

Experience

  • Steignet (Development)
    https://steignet.com/

    When I started working with Steignet, the company was in full-on crisis mode. They had hired a group of IIT graduates to add some visualizations to a dashboard which was the final stage of a long and complicated data pipeline. The programmers delivered the requested features but had broken several pieces of the pipeline in the process. Each day the problems weren't solved, corrupt data was polluting the system.

    The company's pipeline is proprietary but at a high level it scraped data from the web, uploaded it to AWS for processing and storage, and surfaced it in a custom dashboard. After digging in, I identified that the problem was twofold.

    First, as more and more data was being collected for processing, the AWS Elastic Beanstalk instances were not auto-scaling properly, causing them to crash.

    Second, one stage of the processing jobs was hitting the limit of a Python library used to format data for Excel. I managed to find and fix both issues within two weeks, discovering and fixing data integrity and reliability issues with several of the Selenium data scraping jobs in the process.

    After a month of the company trying to solve the issue on their own and through other contractors, their problem was finally solved.

  • Mixmax (Development)

    As part of the growth team at Mixmax I developed an embedded "show me times I'm free" button in meeting scheduling emails. Recipients of an email could click the button, click to sign in with their Google account, and view their availability (pulled automatically from their Google Calendar) compared to the sender's availability.

    The feature's ease of use and immediate usefulness was a hit with potential customers, and it ended up driving thousands of new signups in the first two weeks after it was deployed.

  • ForgetMeNot (Development)
    https://chrome.google.com/webstore/detail/forgetmenot/nncbpjiiekiakcifiiomalecfnipahbj?hl=en

    As the sole technical founder of ForgetMeNot, I built a Slack bot and a Google Chrome extension from scratch in the same month with limited prior experience. I handled every aspect of product engineering—design, implementation, deployment, iteration, and documentation.

    The product was beloved by a vocal few who lauded the intuitive UX and sleek functionality. Unfortunately, our user base was too small to sustain a company.

Skills

  • Languages

    JavaScript, HTML, CSS, SQL, Python, Java, Sass, Less
  • Frameworks

    OAuth 2, Express.js, Django
  • Libraries/APIs

    React, Node.js, Salesforce API, Google Calendar API, Gmail API
  • Paradigms

    REST, MVC Design, Agile, Continuous Integration (CI), Continuous Deployment, On-page SEO
  • Storage

    MongoDB, AWS S3
  • Other

    Slackbot, Chrome Extensions, System Security Developer, Semantic UI, User Experience (UX), Chatbots
  • Tools

    Mongoose, Git
  • Platforms

    AWS Elastic Beanstalk, Heroku

Education

  • Bachelor of Science (BSc) degree in Computer Science
    2012 - 2016
    Yale University - New Haven, CT, USA

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