Jason Irwin
Profile
Software developer with over 25 years of professional experience, focused on systems built to last. I work comfortably across the stack — from database architecture to native iOS — and have spent my career in environments that require both technical precision and clear communication. Long-term maintainability matters more to me than chasing trends. Most of my best work is invisible: it just keeps running.
My background spans enterprise software, educational technology, and independent iOS development. I've worked in multilingual environments throughout — in English and Japanese — and built systems deployed across multiple countries and time zones. Privacy-first design isn't a selling point I lead with; it's just how I think software should be made.
Experience
Led development of internal enterprise systems supporting language training operations across Japan. Designed and maintained Advantage, a custom lesson management system deployed across hundreds of locations nationally. Built Mimosa, a digital textbook platform delivered to students in Asia-Pacific and Latin American markets. Developed a lightweight audio streaming platform optimised for low-bandwidth mobile connections, significantly reducing lesson delivery friction for students in areas with limited connectivity.
Database architecture and development for web-based business applications. Focused on query optimisation, schema design, and data integrity for high-volume transactional systems.
English language instruction for business and general learners, one-on-one and group formats. Curriculum development aligned to CEFR standards. Cross-cultural communication coaching for professionals working in international environments.
Full-stack development on web-based and internal business applications. Worked across the development lifecycle from requirements through deployment and maintenance. Built customer-facing tools and back-office systems for a print and publishing company.
Notable Projects
- Advantage Custom lesson management system, deployed across Berlitz Japan's national network of centres.
- Mimosa Digital textbook platform for Asia-Pacific and Latin American markets.
- Audio Streaming Lightweight lesson audio delivery system optimised for low-bandwidth mobile connections.
- 10Centuries Independent publishing and social platform — personal project, built and operated independently.
- iOS Apps Trek Log, Foursight, and 4615 — local-first iOS apps with no accounts, no tracking, and no subscriptions.