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Summary

Johan Janssens is a seasoned Fractional CTO and Chief Architect, well-versed in Engineering, WebDev, DevOps, and DataOps, and with a strong interest and expertise in next-generation internet technologies.

As co-founder and lead developer of Joomla, an open source CMS used by more than 3% of websites, Johan has made a significant imprint on the world wide web and remains a fierce FOSS advocate.

Johan's drive to "make good code" propels him to constantly explore new ways he can use technology to put a dent in the universe.

Competencies

Enterprise Architecture and Tech Strategy
10
Web Development and Web Performance
10
Team Mentoring and Coaching
9
Startup Development and Scaling
9
DevOps and Edge Computing
8
DataOps and Business Intelligence
8
Next generation internet and Blockchain
7

Skills

Backend
10

PHP, Golang, Rust, Python, Web Assembly, Bash, C/C++

Linux
9

Ubuntu, Alpine Linux, Nginx & Nginx Unit, Apache

DataOps
8

ETL/ELT, DBT, Fivetran, Airbyte, Snowflake, BigQuery, Analytics, BI, SQL, Python

Devops
8

Docker, CloudFlare, Fly.io, AWS, Google Cloud

Frontend
8

Javascript, Typescript, React, CSS, HTML

Webperf
8

Testing, optimisation, accessibility, usability

Blockchain
7

Ethereum, Solidity, Solana, Hyperledger, IPFS

Nextweb
7

Local-First, CRDT, P2P, RDF/LDP, E2EE, Solid, OpenZiti, Wireguard

Work experience

Managing Director

Timble BV
2010
  • Tech Leadership: Led the development of custom digital apps and platforms, delivering tailored solutions that met specific client requirements and business objectives.
  • Enterprise Architecture: Directed large-scale web infrastructure projects to boost operational efficiency for both startups, enterprises and governments.
  • Product Development: Built digital brands and products, diversifying company revenue streams through unique, market-focused open source products.
  • Data Engineering: Created data-driven solutions to enhance business intelligence, leveraging analytics to uncover insights and support informed decision-making.

Fractional CTO

InvestEd Philippines
20222024
  • Data Engineering: Spearheaded the creation of a centralised data pipeline, consolidating diverse data sources into a singular, reliable data warehouse, achieving a 70% reduction in development and operational costs.
  • Data Analytics: Pioneered the development of analytical dashboards, transforming month-long data-related queries into near real-time analyses, and providing real-time insights into crucial business KPIs and metrics.
  • Enterprise Architecture: Architected a custom loan management system, reducing costs fivefold compared to off-the-shelf solutions.
  • Data Science: Engineered a predictive CatBoost machine learning model with a 75% accuracy rate, effectively identifying potential loan defaulters.
  • Engineering: Introduced enhanced project management tools and streamlined workflows, promoting efficient collaboration and fluid information exchange, resulting in a more cohesive and effective team dynamic. 
  • Fundraising: Helped secure 2.5 million USD VC investment to scale the technology and demonstrate initial market fit and growth potential.

Fractional Enterprise Architect

Belgian Police
20102017
  • Web Development: Architected and developed a PHP framework to power the Open Police web publishing platform specifically tailored for all 190 Belgian local and federal police forces, showcasing a successful integration of technology and governance. 
  • Enterprise Architecture: Advocated and implemented agile architecture concepts, including open governance, open data, and open source, to create a modern, cost-effective public communication platform that enhances citizen engagement.
  • Growth Hacker: led the platform to achieve a consistent 30% year-over-year growth, resulting in over 1 million unique visitors annually, underscoring its significance as a vital tool for public communication.
  • FOSS Advocacy: Championed the promotion and adoption of Free and Open Source Software (FOSS) within governmental structures. This advocacy facilitated a substantial shift towards open data, open governance, and open-source solutions, fostering transparency, enhancing public trust, and stimulating innovation.

Fractional Enterprise Architect

Unilever
20122015
  • Web Development: Spearheaded the development of a comprehensive open-source website platform using Joomla CMS, enhancing user experience and simplifying administration through multi-site management and multilingual options. 
  • DevOps: Collaborated with Unilever to consolidate over 300 disparate brand websites into a unified platform, significantly streamlining web presence and simplifying website management.
  • Architecture: Leveraged architectural expertise to ensure brand consistency and ease of content updates across all sites, improving operational efficiency

Co-Founder and Lead Developer

Joomla
2005present
  • Co-founded Joomla, an award-winning content management system (CMS). Lead the development of Joomla 1.5, contributing more than 60% of the overall code and designing the core architecture and framework.
  • Spearheaded the transition into a platform that could also support enterprise-class web application development and expanded the system's functionality and broadened its utility for businesses seeking to build and manage dynamic web applications.
  • Grew Joomla from a new entry in the CMS market to powering 10% of all dynamic sites on the internet.

    Joomla is a not for profit open source project, role is voluntary

Board Member and Project Manager

OpenSourceMatters
20062008
  • Established Open Source Matters, Inc. (OSM), a non-profit formed under U.S. law to provide organizational, legal, and financial backing to the Joomla project.
  • Contributed to expanding the Joomla community, successfully attracting over 1000 contributors globally, fostering a significant collaborative global development environment.

    OpenSourceMatters is a not for profit entity, role was unpaid.

Education

Masters

Internationale Hogeschool Leuven
2004-01

Groep T - Internationale Hogeschool Leuven
Masters, Computer science specializing in game development and interactive media
2002 - 2004

Bachelor

Katholieke Hogeschool Kempen
2002-01

Katholieke Hogeschool Kempen
Bachelor, Informatics and computer technology
2000 - 2002

Masters

Hogeschool West-Vlaanderen - Vlaamse Autonome Hogeschool
2000-01

Hogeschool West-Vlaanderen - Vlaamse Autonome Hogeschool
Masters, Industrial engineering and industrial design
1997 - 2000

Languages

Dutch
10
English
9
French
4

Achievements