Resume / Apr 2026

Joakim Nylén

Backend Developer

Backend developer with 15+ years of experience across consulting, product development, and entrepreneurship. Strongest in Ruby, Elixir, data-heavy systems, integrations, and the practical work of keeping production software dependable over time.

Work experience

Backend Developer

OutdoorMap

Apr 2023 - Present

Architecting and developing a comprehensive outdoor adventure platform for Nordic municipalities, leading migration from Rails to Elixir while managing Linux servers, deployments, and uptime for systems serving more than 10 million views and around 2 million API calls per day.

RubyElixirRustGoGIS

Senior Ruby on Rails Consultant

Nexer Group

Sep 2025 - Present

Senior Backend Consultant for enterprise clients across financial services and non-profit sectors, architecting scalable APIs and database schemas for high-traffic applications.

RubyPostgreSQL

Senior Ruby on Rails Consultant

Nexer Group

Nov 2023 - Oct 2024

Senior Backend Consultant delivering production-grade applications for enterprise clients, architecting scalable APIs and optimized database schemas for high-traffic systems.

RubyPostgreSQL

Founder & Developer

Pixelmonster

Aug 2020 - Oct 2024

Founded and scaled EPG data infrastructure serving major Swedish media companies, building high-throughput data pipelines processing 460 GB daily.

ElixirRubyData PipelineAPI DevelopmentB2B

Backend Developer

Odd Camp

Jan 2020 - Mar 2023

Backend developer for gaming and nature platforms handling high-volume concurrent users, optimizing code to reduce client expenses and leading infrastructure migrations.

RubyElixirPostgreSQLDocker

Selected projects

Core skills

Expertise

Backend DevelopmentData IngestionServer ManagementCode Performance

Languages & Frameworks

ElixirPhoenix FrameworkRuby (on Rails)Tailwind CSSPerlPHPRustGo

Platforms

HerokuAmazon AWSNetlifyRenderOVHHetznerBarebone Linux

Highlights

  • Founded XMLTV.se and built EPG data infrastructure processing 460 GB of incoming EPG files from TV channels daily, serving thousands of users and major Swedish media companies for 15 years
  • Created mrml-rails gem, now used by thousands of developers for responsive email templates in Ruby on Rails
  • Architected high-throughput data pipelines handling millions of records daily for media distribution
  • Delivered production systems for multiple enterprise clients as Senior Ruby on Rails consultant

Education

Web Developer E-commerce

Changemaker Educations

2018 - 2020

Comprehensive program covering web development, e-commerce solutions, digital marketing, UX/UI design, and both frontend and backend programming. Included industry knowledge, project methodology, and practical work experience (LIA).

Selected clients and sectors

Games and IPs

  • Age of Wonders: Planetfall
  • Cities: Skylines
  • Crusader Kings 3
  • Empire of Sin
  • Europa Universalis IV
  • Hearts of Iron 4
  • Imperator Rome
  • Prison Architect
  • Second Extinction
  • Stellaris
  • Surviving Mars
  • Surviving the Aftermath
  • Victoria 3
  • World of Darkness
  • Wraith: Oblivion - Afterlife

Media and Journalism

Civil Society and NGOs

Sports/Outdoors