
Jon Lunsford
San Luis Obispo, CA
Intro Statement
Senior software engineer with 10+ years of experience at small to medium sized startups, agencies and large corporations. Helped scale ARR from $9M to $33M at ConvertKit through implementing highly scalable, data-intensive systems. Recipient of a Davey Gold Award, W3 Gold Award, HOW Interactive Merit and an OMMA Award nomination.
Technologies
I want to work with:
elixir erlang/OTP ruby go rust pythonExperience 8 positions (14 years, 3 months)

Sr. Engineer
Jan, 2017 → Current (6 years, 9 months)
ruby ruby-on-rails elixir redis sidekiq amazon-web-services heroku github go mysql postgresql cassandra elasticsearch backend- Implemented a cost-efficient, event-driven analytics backend processing over 30,000 events per minute, empowering customers to analyze vital business metrics, including traffic sources and revenue streams.
- Developed engagement analysis of over 4 billion customer subscribers, processing real-time events such as email opens, link clicks, page views and product purchases to enable powerful targeting and audience segmentation.
- Pioneered machine learning and behavioral analysis systems for credit card fraud prevention, saving over $450,000 in losses and ensuring the seamless processing of over $3,000,000 in monthly revenue.
- Built robust spam and bot detection systems, ensuring a 99.5% email delivery rate for 2.5 billion monthly emails, safeguarding the company’s reputation and preventing automated sign-ups.
- Conducted regular “Lunch & Learn” sessions on topics such as OO Design, Testing, DDD, and Systems Design, enhancing code quality, such as reducing flaky tests by 25%.
- Mentored Junior engineers through continuous education and pairing, enabling others to reach their career goals.
- Added documentation generation to CI/CD pipelines; led the adoption of RDoc, improving code reliability.

Owner / Engineer
Aug, 2009 → Jul, 2021 (12.0 years)
ruby elixir phoenix ruby-on-rails rspec backendCapture The Castle was my personal freelancing business. Building software for small and large businesses.
Full Stack Developer (Ruby On Rails)
Nov, 2014 → Jan, 2017 (2 years, 3 months)
ruby ruby-on-rails knockout.js javascript sass rspec redis sidekiq haml jst jira kanban agileWorking fully remote. Implementing features for a MOOC and LMS platform focused on providing the best user experience for students from all over the world to learn about art, code, and creative collaboration. My responsibilities included gathering specifications and requirements from designers, marketers, customers, and building full stack solutions to solve those problems. From implementing the backend API in Rails to the front end UI and UX written in HAML, JS (A lot of Knockout), and SASS.
Front End Engineer
Aug, 2012 → Nov, 2014 (2 years, 4 months)
tfs visual-studio less javascript scrum agileFront end engineer on a scrum team consisting of 7, in a department of 16 scrum teams.

Full Stack Developer (Ruby On Rails), contract.
Jun, 2014 → Sep, 2014 (4 months)
ruby ruby-on-rails vim circleci continuous-integration rspec3 tmuxWorking fully remote. Responsible for adding various, full stack, features to an email archive web service.

Full Stack Developer at WINTR
Nov, 2011 → Aug, 2012 (10 months)
ruby ruby-on-rails capistrano ssh command-line zsh haml javascript css html amazon-elastic-beanstalkInteractive web developer in a small fast paced agency working with several high profile clients and companies. I would work on the full stack of any website or application I was assigned, from back end to front end. Work was produced on fairly tight deadlines at a very quick rate. I built the 2012 Sasquatch Festival website that won a Davey Gold Award, W3 Gold Award, HOW Interactive Merit and an OMMA Award nomination.

Web Developer
Oct, 2010 → Oct, 2011 (1 year, 1 month)
html css javascript php mysql wordpress photoshop adobe-illustrator adobe-indesignTaphanldes is a firm focused on the craft beer industry. I was part of a design team working on production design projects as well as developing all client websites. I was the sole developer at the time.
All websites that were produced at this time were built with wordpress, php, and MySql. The WP interface would be customized completely for the clients needs.
Web Developer at Progressive inovations / The Canopy club
Jul, 2009 → Aug, 2010 (1 year, 2 months)
html css javascript php mysql wordpress photoshop adobe-illustrator adobe-indesignI was in charge of all promotions media produced by the company, this ranged from print ads, posters, festival merchandise and signage, festival web sites, event web sites, and the company web site.
All web sites were built on Wordpress with highly customized interfaces depending on the content that needed to be managed. The company would produce very large music festivals which resulted in very high traffic to the websites, I would combat this with heavy caching and optimization where possible.
Apps and Software (3)

DevStory
March, 2022
I made DevStory in response to StackOverflow shutting down their resume / CV product. The goal of this project is to provide a good way for developers to communicate their work and learning history, hopefully landing them a great job! Built with Elixir/PhoenixLiveView

Myco Farm Co.
September, 2020
elixir nerves-project iot influxdbMyco Farm Co. is a small scale farm specializing in gourmet & medicinal mushrooms.
Using proprietary technology, called MycoBot, we grow Maitake, Lion's Mane, Chestnut, King Oyster, Golden Oyster, Blue Oyster, Turkey Tail and more.

Syndicate App.
April, 2018
elixir phoenix redis digital-ocean dokku postgresqlAutomate email arrivals to your inbox with powerful rules. Take control of your Syndication with anonymity and automation.
Public Artifacts (13)
Elixir - Score: 201/300
December, 2021

Ruby Language Fundamentals - Score: 244/300
July, 2021

Building Web Apps with Ruby On Rails - Score: 211/300
July, 2021

EMx 104: Deploying Elixir with Mix, Terraform and Ansible with Jon Lunsford
August, 2020
elixir ansible terraform amazon-web-services smtpIn this episode of Elixir Mix, we talk with Jon Lunsford about Elixir’s many releases and deployment options, why/how to deploy Elixir with Terraform and we learn why Jon built an SMTP server in Elixir! Sponsors Groxio.io | Career Rocket Fuel For Curious Coders CacheFly Panel Alex Koutmos Steven Nuñez Lars Wikman Sophie DeBenedetto Guest…
Deploying Elixir (3 of 3): Provisioning EC2 With Ansible
June, 2020
elixir ansible terraform amazon-web-servicesProvision an EC2 instance with Ansible for elixir deployment. third in a series of three posts on deploying Elixir.
Deploying Elixir (2 of 3): Terraforming an AWS EC2 Instance
June, 2020
elixir ansible terraform amazon-web-servicesPrepare an EC2 instance with Terraform for elixir deployment. Second in a series of three posts on deploying Elixir.
Deploying Elixir (1 of 3): Building Releases With Mix
June, 2020
elixir terraform ansibleBuild elixir releases locally with Docker & Mix. First in a series of 3 posts on deploying Elixir.

Elixir: Building a Small JSON Endpoint With Plug, Cowboy and Poison
May, 2019
elixir plug cowboy poisonLet’s see how easy it is to build a production ready endpoint with Plug, using Erlang’s Cowboy HTTP server
Refactoring Ruby: Introduce Null Object
September, 2018
ruby refactoringIntroduce Null Object is a great refactoring tool when you find yourself checking for nil too often. nil checks are often signs of much…
Refactoring Ruby: Extract Method
September, 2018
ruby refactoringExtract Method can be used when you have several expressions, a code fragment, that can be grouped together. Even if there is one…
Refactoring Ruby: Replace Temp with Query
August, 2018
ruby refactoringLet’s look at another simple yet powerful refactoring method, Replace Temp with Query. You can use this when you have a temporary variable…
Refactoring Ruby: Extract Variable
August, 2018
ruby refactoringLet’s take a look at a simple way to add clarity to your ruby methods. Extract Variable or Introduce Explaining Variable, it’s probably one…

Receiving Emails Over SMTP With Elixir
November, 2017
elixir smtpLet’s see just how simple SMTP is with elixir/erlang. I began experimenting with this mostly as a learning tool to get more familiar with…
Readings
Designing Data-Intensive Applications
by Martin Kleppmann
Mastering Reliability, Scalability and Maintainability in large applications.
Concurrent Data Processing in Elixir
by Svilen Gospodinov
Learn different ways of writing concurrent code in Elixir and increase your application’s performance, without sacrificing scalability or fault-tolerance.