I use Rails every day to build complex apps for my clients. I have experience building completely Test Driven apps (using TDD principals). I use continuous integration to enforce testing within my own company.

I've built 5 APIs that are in production and have been maintained through multiple major revisions. I can help you understand how to build maintainable, scalable APIs in ruby using Grape, as well as share some snippets I use to help DRY up my code when building APIs.

I've built three production-grade clusters for three different projects: using helm to produce multiple environments and linking into CI/CD pipelines, as well as using ServiceBroker to handle databases and other resources outside of k8s.

I've built 3 production-grade APIs and one (simple, small budget) social media platform since February 2016.

Some open source Elixir libraries I've written so far:

https://github.com/johnhamelink/xslt
https://github.com/johnhamelink/sms_blitz
https://github.com/johnhamelink/mws
https://github.com/johnhamelink/exrm_deb

I actively work on an API which handles 60,000 active users a day and makes heavy use of Ejabberd for chat.

I've built a multi-lingual CMS for a mobile app which is in the top-10 list on Apple's App Store.

i've built a simple social network using Neo4J as a graph database.

I built a photo moderation system which was used within a video transcoding pipeline to produce tens of thousands of custom videos for an app which promoted a popular music festival in Scotland (T in the Park).

Exeprience with use of Postgres at scale, including using RDS, JSONB, Hstore, PostGIS, even custom extensions!

I've built multiple production-grade AWS clusters, including autoscaling systems, lambda functions and video transcoding pipelines.

I use ansible for all of my server management and configuration on my production machines. 

I submitted a patch for a bug in Ansible that was causing problems for people with dashes in their MySQL databases.

I've amassed a rather large library of Ansible roles (collectd, fail2ban, hosts, imagemagick, mysql, backup (ruby gem), nginx, nodejs, php, postgres, rails, postgres_extensions, repo, rvm, initd, redis, timezone, valkyrie (mysql -> postgres conversion), and wordpress to name a few) which I use to deploy my apps.

I've written and open sourced roles for Kibana, Logstash, and Elasticsearch.

Consul is a relatively new technology that allows you to automatically discover and collect information about the servers in your network. I've deployed Consul across all of my servers, and I've written a popular and well-used ruby gem ( https://github.com/WeAreFarmGeek/diplomat ) that allows you to harness it's Key-value store.

I use git daily, and have picked up a myriad of tricks on how to handle specific situations cleanly, as well as how to avoid them in the first place. I've contributed to open source projects where good version control etiquette is important and enforcement of best practices is crucial.

I run a cluster of AWS instances which handle 60,000 active users per day. I have built systems for large corporate clients which have handled 200 million hits a day.

I use Arch Linux with bspwm as part of my daily workflow. I believe that if you are building tools for a specific operating system, you should use that operating system to develop in.

I've built realtime financial systems in NodeJS & websockets.
I've built mobile web apps in Sencha for large organisations.
I've built countless websites using jQuery, and I've written a few jQuery plugins:

https://github.com/johnhamelink/jquery.modal.suck
https://github.com/johnhamelink/isOK.js

I've built countless websites using jQuery, and I've written a few jQuery plugins:

https://github.com/johnhamelink/jquery.modal.suck
https://github.com/johnhamelink/isOK.js

I've been building HTML and CSS layouts for a long time now. I've done everything from blog layouts all the way up to network visualisations.

I've been using PHP since PHP 4.4. I've built massive websites in PHP, including large Ecommerce sites with over 1million products, complex custom CMS systems, and API servers.

I wrote an Elixir client library for Amazon MWS ( also known as Amazon Merchant Web Services - check out the library here: https://github.com/johnhamelink/mws ) which was used to produce a custom product for a client which produced product listings and received purchasing events on Amazon.

I've built a few small pet projects using Elm - I've been working on a few small projects including a UI for a music player 

Personal details

John H.

Summary

Technical skills