Johannes Ulén
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