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I'm an auto-didact and self-directed software engineering and design professional with 25 years of professional experience. I’m drawn to team culture, productive ways of working, and maintainable architecture. My strengths include strong communication, clarity, empathy, and a genuine desire to help my teams succeed, along with high focus and efficiency built through years of experience. As an individual contributor I deliver high output while focusing on business value and tangible outcomes for customers and stakeholders. As a leader and collaborator, I have guided cross-functional teams across remote and in-person contexts, turning complex business goals into scalable software systems. I’m passionate about modernizing legacy architectures, design systems, performance optimizations, and building maintainable environments that accelerate delivery and improve reliability.…I'm an auto-didact and self-directed software engineering and design professional with 25 years of professional experience. I’m drawn to team culture, productive ways of working, and maintainable architecture. My strengths include strong communication, clarity, empathy, and a genuine desire to help my teams succeed, along with high focus and efficiency built through years of experience. As an individual contributor I deliver high output while focusing on business value and tangible outcomes for customers and stakeholders. As a leader and collaborator, I have guided cross-functional teams across remote and in-person contexts, turning complex business goals into scalable software systems. I’m passionate about modernizing legacy architectures, design systems, performance optimizations, and building maintainable environments that accelerate delivery and improve reliability.

André Wyrwa Roman Diaz

Full Stack Developer, Web Developer, Front-End Developer, +4

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I'm an auto-didact and self-directed software engineering and design professional with 25 years of professional experience. I’m drawn to team culture, productive ways of working, and maintainable architecture. My strengths include strong communication, clarity, empathy, and a genuine desire to help my teams succeed, along with high focus and efficiency built through years of experience. As an individual contributor I deliver high output while focusing on business value and tangible outcomes for customers and stakeholders. As a leader and collaborator, I have guided cross-functional teams across remote and in-person contexts, turning complex business goals into scalable software systems. I’m passionate about modernizing legacy architectures, design systems, performance optimizations, and building maintainable environments that accelerate delivery and improve reliability.…I'm an auto-didact and self-directed software engineering and design professional with 25 years of professional experience. I’m drawn to team culture, productive ways of working, and maintainable architecture. My strengths include strong communication, clarity, empathy, and a genuine desire to help my teams succeed, along with high focus and efficiency built through years of experience. As an individual contributor I deliver high output while focusing on business value and tangible outcomes for customers and stakeholders. As a leader and collaborator, I have guided cross-functional teams across remote and in-person contexts, turning complex business goals into scalable software systems. I’m passionate about modernizing legacy architectures, design systems, performance optimizations, and building maintainable environments that accelerate delivery and improve reliability.

Available to hire

I’m an auto-didact and self-directed software engineering and design professional with 25 years of professional experience. I’m drawn to team culture, productive ways of working, and maintainable architecture. My strengths include strong communication, clarity, empathy, and a genuine desire to help my teams succeed, along with high focus and efficiency built through years of experience. As an individual contributor I deliver high output while focusing on business value and tangible outcomes for customers and stakeholders.

As a leader and collaborator, I have guided cross-functional teams across remote and in-person contexts, turning complex business goals into scalable software systems. I’m passionate about modernizing legacy architectures, design systems, performance optimizations, and building maintainable environments that accelerate delivery and improve reliability.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

German

Fluent

English

Fluent

Spanish; Castilian

Intermediate

Russian

Beginner

French

Beginner

Finnish

Beginner

Swedish

Beginner

Latin

Beginner

Work Experience

Software Engineering Contractor at Hatch

January 1, 2023 - October 31, 2025

Implemented complex features like onboarding, filtering and saved jobs. Implemented devops features such as feature flags, end-to-end test suite, and compile-time optimizations.

Software Engineering Contractor at Immutable

April 1, 2021 - November 1, 2024

Implemented multiple large-scale Web2 and Web3 features like DeckBuilder, Forge, Crafting, Game Mode Selection; negotiated and implemented front-end code architecture with project co-leads; ported the front-end to mobile; built a well-organised, maintainable & performant front-end based on Angular/NX best practices; mitigated tech debt; promoted team efficiency and well-being; contributed to UX design & Design System decisions.

Principal Software Engineer, Engineering Manager, Senior Engineer, Contractor at The Iconic

January 1, 2014 - December 31, 2022

Worked with CTO and CPO on engineering strategies; managed 3 engineers and mentored 4 teams; led major projects including checkout rewrite, campaign manager, side-wide HTTPS, performance optimisation, analytics implementation; designed software architecture across application development and infrastructure; modernised legacy systems and test frameworks; improved CICD pipelines; established a Design System and led front-end initiatives.

Software Engineer, Technical Lead (Full-Stack) at Momentum Cloud Pty Ltd

January 1, 2010 - December 31, 2011

Developed an online school management platform (PHP/Symfony, XHTML, JavaScript/AJAX, CSS); acted as technical lead and assisted in agile project management (6 Engineers); designed scalable web-applications; implemented CI/CD toolchain and assisted in infrastructure; contributed to UX design.

Software Engineer, Analyst Programmer (Full-Stack) at MentorEducation Group

January 1, 2008 - December 31, 2010

Developed from-scratch a multi-site training & student management system used by subsidiaries and clients in Australia and New Zealand (PHP, JQuery); engineered AJAX/PHP/MySQL RDF foundation; backend and frontend development; established infrastructure (Subversion, MantisBT, DokuWiki); maintained servers and improved legacy systems; produced user documentation.

Analyst Programmer, UI Developer, Graphic Designer & Developer (Front-end) at Puttoo Inc.

January 1, 2004 - December 31, 2011

Developed an XML/XForms powered visual form builder and data management system; OO JavaScript/AJAX; data modelling in XML Schema, XForms, XPath and XQuery; used an eXist native XML database; created client-side UX and templates; contributed to corporate design and content management templates (Joomla).

Freelance Graphic Designer & Web Developer at Self-employed

January 1, 2001 - December 31, 2008

Designed and developed web front- and back-ends for clients in Germany, Finland, Australia and USA; contributed to UI improvements for The GIMP and OpenOffice; created corporate identity; produced icons and book illustrations; involved in freelance design projects.

UI Designer / UI Developer at SAPERION AG

January 1, 2001 - December 31, 2007

Visually redesigned SAPERION native client UI; contributed conceptual improvements; established user interface guidelines; implemented interactive UI prototypes and feature demos; contributed to corporate UI design.

Software Engineer at Hatch

March 1, 2025 - October 1, 2025

Implemented complex onboarding, filtering and saved jobs; implemented devops features like feature flags, end-to-end test suite, and compile-time optimizations.

Software Engineer, Analyst Programmer (Full-Stack) at MentorEducation Group

January 1, 2004 - December 31, 2011

Developed a multi-site training & student management system; built AJAX/PHP/MySQL backend; established infrastructure (Subversion, MantisBT, DokuWiki); produced user documentation and tutorials; supervised a co-engineer.

Analyst Programmer, UI Developer, Graphic Designer (Front-end) at Puttoo Inc.

January 1, 2001 - December 31, 2004

Developed an XML/XForms-based visual form builder; object-oriented JavaScript front-end development; designed and implemented UX; coordinated co-engineers; established corporate design templates.

Software Engineer at SAPERION AG

January 1, 2001 - January 1, 2007

Visually redesigned SAPERION native client UI; contributed conceptual proposals for UI improvements; established UI guidelines and created interactive prototypes.

Freelance Graphic Designer & Web Developer at Various Clients

January 1, 2001 - December 31, 2007

Designed and developed web front- and back-ends; contributed to UI improvements for The GIMP and OpenOffice; created icons and book illustrations; managed multiple freelance projects across Germany, Finland, Australia and the USA.

SAPERION AG (early career note) at SAPERION AG

January 1, 2001 - January 1, 2007

Visually redesigned UI and contributed to UI guidelines and prototyping.

Software Engineer, Technical Lead (Full-Stack) at Momentum Cloud Pty Ltd

January 1, 2011 - January 1, 2014

Developed an online school management platform (PHP/Symfony, XHTML, JavaScript/AJAX, CSS). Acted as technical lead and assisted in agile project management (6 engineers). Designed scalable web applications (PHP, MySQL, Apache, Elasticsearch, RabbitMQ). Implemented & administered the CI/CD toolchain and aided in infrastructure management (Git, JIRA, Confluence) with focus on UX contributions.

Graphic & Interaction Designer & Developer (Freelance) at SAPERION AG

January 1, 2001 - January 1, 2007

Visually redesigned the SAPERION native client UI; contributed to UI guidelines and interactive prototypes; delivered feature demos and corporate identity assets.