About

Hello there! I am Jairus ‘JJ’ Joer, a Senior Full Stack Engineer and Designer based in Germany. I care deeply about software that feels thoughtful in every layer: clear in its structure, expressive in its interface, respectful of the people who use it, and deliberate in the way it supports real work.

The work I delight in most sits at the intersection of user experience, accessibility, design systems, and developer experience. I enjoy shaping systems that make taste practical, whether through refining interfaces, building resilient foundations, or creating tools that disappear into the flow of thought.

In recent years, I have helped teams modernise platforms, improve performance, grow reach, and adopt shared systems that raise the quality of everyday work. I currently do this at HERO Software, where I contribute to platform modernisation through monorepo orchestration and design system adoption.

Experience

Senior Full Stack Engineer at HERO Software
Hanover, Germany · Hybrid
Apr 2024 — Present
Freelance Developer and Designer
Hanover, Germany · Hybrid, Part-time
Nov 2020 — Present
Full Stack Developer at neuwaerts
Hanover, Germany · Hybrid
Jul 2019 — Mar 2024
Media Designer Apprentice at TA Bildungszentrum
Hamelin, Germany · On-site
Aug 2018 — May 2019
Co-Founder at XVI CHAPEL
New York, United States · Remote
Apr 2016 — May 2017
Marketing Manager at World Of Bass Records
New York, United States · Remote, Part-time
Oct 2015 — Aug 2016

Awards

BCM Content Platforms B2C Gold
For zukunftswaende.de, at neuwaerts
Jan 2022

Projects

Co-Author and Maintainer at Aggregata
Technical blog reaching 9000+ monthly unique visitors
Aug 2022 — Dec 2025

Speaking

Figma Workshop Series
neuwaerts
Nov 2023
Working with Projects and Files
neuwaerts
Sep 2023
Digital Tools for Clients
neuwaerts
Jul 2023
Generative Texts
neuwaerts
May 2023
New Work
neuwaerts
Nov 2019

Education

Media Design Apprenticeship
Multi Media Berufsbildende Schulen Hannover (MMBbS)
Aug 2018 — Jul 2021
Matura in Linguistics
Kooperative Gesamtschule Gronau (Leine)
Sep 2015 — Jun 2018