Johannes Ulén

contact@johannesulen.se

+46738370791

Västerås, Sweden

Experience

Jun 2024 - now

Paligo

Engineer

  • Development and maintenance of backend systems written in PHP
  • Modernizing legacy systems
  • Frontend development in jQuery and Vue
Apr 2022 - May 2024

Frilans Finans

Backend Engineer

  • Developed and maintained backend systems written in PHP and Go
  • Focused on security and contract testing
Nov 2021 - Apr 2022

Joint Academy

Backend Engineer

  • Developed and maintained backend systems written mainly in Ruby on Rails
Dec 2020 - Nov 2021

Pingdom

Fullstack developer

  • Developed and maintained backend services written in PHP, Go, Python, Node.js and C, and frontend systems written in Mithril and React
  • Made improvements to internal tooling used by the majority of internal services and by all developers
Jul 2020 - Dec 2020

Qasa

Front-end developer

  • Wrote React-based views in the Qasa application
  • Worked on a GraphQL API written in Ruby on Rails
  • Developed and maintained internal tooling written in Node.js
Feb 2020 - Jul 2020

Westermo

Software Engineer

  • Developed and maintained the internal testing framework written in Python and Go
  • Researched and experimented with running said framework in a Kubernetes cluster
  • Helped with developing modern web applications using Node.js and Vue
Sep 2019 - Jan 2020

Lägenhetsbyte

Fullstack developer

  • Full-stack development using mainly Node.js and Vue
  • Developed using CQRS and event sourcing principles
  • Used various AWS services such as Lambda, S3, DynamoDB and Cognito
May 2017 - Sep 2019

Pingdom

Fullstack developer

  • Worked mainly with JS, Node.js, Python, PHP and Go
  • Implemented features and fixed bugs in all parts of the stack of the Pingdom product
  • Was part of the migration from a homegrown billing system to Chargify
Apr 2016 - May 2017

Rabalder Media

Frontend developer

  • Worked in a variety of projects with different customers
  • Mainly front-end work hosted on Netlify, but also some back-end work on custom infrastructure and PaaS systems like Heroku
  • Developed custom WordPress themes with Timber and Bedrock
Nov 2015 - Apr 2016

CGI

Developer

  • Mostly web development in Java and ASP.NET
  • Maintenance work on a legacy system used in dentist offices in the Västernorrland county

Education

2012 - 2015

Bachelor of Science in Computer Engineering

Mid Sweden University