With over 18 years of experience in software development, including more than 15 years as a freelance developer, I bring a broad spectrum of skills and expertise. As a full-stack developer, I work across both frontend and backend to design and build robust web applications, and I have hands-on experience in Android development as well. I have collaborated with renowned companies such as Continental, Bosch, Audi, Meiller, DWS/Morgenfund, Flextronics, Dallmeier Electronics, BDT, Smart InsureTech, and Inverso. I also authored a book on programming principles and consistently emphasize clean code, SOLID, and practical design patterns. My experience spans Java, Kotlin, C#, C++, Angular, HTML5, CSS3, JavaScript, PHP, TypeScript, and Delphi, and I routinely develop RESTful and SOAP interfaces while prioritizing maintainable, future-proof software.

Enrico Gehring

With over 18 years of experience in software development, including more than 15 years as a freelance developer, I bring a broad spectrum of skills and expertise. As a full-stack developer, I work across both frontend and backend to design and build robust web applications, and I have hands-on experience in Android development as well. I have collaborated with renowned companies such as Continental, Bosch, Audi, Meiller, DWS/Morgenfund, Flextronics, Dallmeier Electronics, BDT, Smart InsureTech, and Inverso. I also authored a book on programming principles and consistently emphasize clean code, SOLID, and practical design patterns. My experience spans Java, Kotlin, C#, C++, Angular, HTML5, CSS3, JavaScript, PHP, TypeScript, and Delphi, and I routinely develop RESTful and SOAP interfaces while prioritizing maintainable, future-proof software.

Available to hire

With over 18 years of experience in software development, including more than 15 years as a freelance developer, I bring a broad spectrum of skills and expertise. As a full-stack developer, I work across both frontend and backend to design and build robust web applications, and I have hands-on experience in Android development as well.

I have collaborated with renowned companies such as Continental, Bosch, Audi, Meiller, DWS/Morgenfund, Flextronics, Dallmeier Electronics, BDT, Smart InsureTech, and Inverso. I also authored a book on programming principles and consistently emphasize clean code, SOLID, and practical design patterns. My experience spans Java, Kotlin, C#, C++, Angular, HTML5, CSS3, JavaScript, PHP, TypeScript, and Delphi, and I routinely develop RESTful and SOAP interfaces while prioritizing maintainable, future-proof software.

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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
Intermediate
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Language

German
Fluent
English
Fluent

Work Experience

Freelance Full-Stack & Web Developer at Self-employed
January 1, 2009 - Present
Delivered end-to-end web solutions across industries with core responsibilities including API-first design, microservices, containerization, DevOps pipelines, and responsive front-ends. Worked with companies in automotive and manufacturing (Continental, Audi, Bosch), finance and insurance (DWS/Morgenfund, Inverso, Smart InsureTech, Fondsdepotbank), and technology and services (Flextronics, Secodym, BDT, First Soft Solutions).
Technical Author at Self-employed
December 31, 2024 - July 29, 2025
Authored "Principles of Programming", a Java-centric guide to Clean Code, SOLID, and KISS with hands-on examples.
Android Developer at First Soft Solutions
March 1, 2025 - July 29, 2025
Conceptualized, built, and evolved the “Learning Machine” app using Java/Kotlin, Android Studio, Billing API, Text-to-Speech, SQLite, and Google Play deployment. Added new features, responsive UI, JSON-driven portfolio website, expanded app features including swiping effects and billing integration. Used Agile methodologies (Scrum/Kanban), version control (Git), Docker/Kubernetes, and rigorous testing (Unit, TDD).
Freelance Full-Stack & Web Developer at Self-employed / Freelance
January 1, 2009 - Present
Delivered end-to-end web solutions across industries with API-first design, microservices, containerization, DevOps pipelines and responsive front-ends.
Teaching - Web Development at DCI Digital Career Institute
August 1, 2025 - Present
Teaching modern web development focusing on full-stack technologies (JavaScript, Node.js, HTML5, CSS3, React, Express, MongoDB).
XML-based Trigger Management / MKS → IMS Migration at Continental
December 31, 2016 - September 23, 2025
XML-based trigger management, MKS → IMS migration.
Production System Planning / Performance Analysis at Audi
December 31, 2015 - September 23, 2025
Production system planning, performance analysis.
Internal Angular 16 Web App / SOLID & Design Patterns at Bosch
December 31, 2024 - September 23, 2025
Internal Angular 16 web app, SOLID and design patterns, responsive UI.
Front-end / Back-end Enhancements at DWS/Morgenfund
December 31, 2023 - September 23, 2025
Front-end/back-end enhancements, Azure/MSSQL.
IBM WebSphere DevOps / Performance Tuning at Inverso
December 31, 2020 - September 23, 2025
IBM WebSphere DevOps, performance tuning.
Java/SOAP Services / DevOps Management at Smart InsureTech
December 31, 2018 - September 23, 2025
Java/SOAP services, DevOps management.
Full-Stack Maintenance of Financial Market Portal at Fondsdepotbank
December 31, 2017 - September 23, 2025
Full-stack maintenance of financial market portal.
Linux-console Replacement with AngularJS/Node.js at Flextronics
December 31, 2017 - September 23, 2025
Linux-console replacement with AngularJS/Node.js.
JavaFX GUI / Neo4j Integration at Secodym
December 31, 2022 - September 23, 2025
JavaFX GUI, Neo4j graph-database integration, Java/JavaFX.
Touchscreen HMI / PHP & C++ Interfaces at BDT
December 31, 2013 - September 23, 2025
Touchscreen HMI, PHP/C++ interfaces, Jira/Confluence.
Portfolio Website - First Soft Solutions at First Soft Solutions
March 31, 2025 - September 23, 2025
Portfolio Website PHP, responsive design, multi-language.
Android Developer at Self-employed / Learning Machine project
December 31, 2025 - September 23, 2025
Conceptualized, built, and evolved the Learning Machine app using Java/Kotlin, Android Studio, Billing API, Text-to-Speech, SQLite, and Google Play deployment.
Technical Author at Self-employed
December 31, 2024 - September 23, 2025
Wrote Principles of Programming: a Java-centric guide to Clean Code, SOLID, and KISS, with hands-on examples.
Freelance Full-Stack & Web Developer at Freelance / Self-employed
January 1, 2009 - Present
Delivered end-to-end web solutions across industries with API-first design, microservices, containerization, DevOps pipelines, and responsive front-ends.
Android Developer at Self-employed / Freelance
January 1, 2025 - September 23, 2025
Conceptualized and built the Learning Machine Android app using Java/Kotlin, Android Studio, Billing API, Text-to-Speech, SQLite, and Google Play deployment.
Teaching at DCI - Digital Career Institute
August 1, 2025 - Present
Teaching modern web development focusing on full-stack technologies such as JavaScript, Node.js, HTML5, CSS3, React, Express, and MongoDB.
Technical Author at Self-employed
December 31, 2024 - September 23, 2025
Wrote Principles of Programming: a Java-centric guide to Clean Code, SOLID, and KISS, with hands-on examples.
Continental at Continental (Automotive & Manufacturing)
December 31, 2016 - September 23, 2025
XML-based trigger management and MKS to IMS migration activities; contributed to system integration planning.
Audi at Audi
December 31, 2015 - September 23, 2025
Production system planning and performance analysis; optimization of manufacturing workflows.
Bosch at Bosch
December 31, 2024 - September 23, 2025
Internal Angular 16 web app development focusing on SOLID and design patterns and responsive UI.
DWS/Morgenfund at DWS/Morgenfund
December 31, 2023 - September 23, 2025
Front-end/back-end enhancements, Azure/MSSQL – performance tuning and portal improvements.
Inverso at Inverso
December 31, 2020 - September 23, 2025
IBM WebSphere DevOps, performance tuning and modernization tasks.
Smart InsureTech at Smart InsureTech
December 31, 2018 - September 23, 2025
Java/SOAP services, DevOps management for insurance tech solutions.
Fondsdepotbank at Fondsdepotbank
December 31, 2017 - September 23, 2025
Full-stack maintenance of financial market portal; integrated front-end with back-end services.
Flextronics at Flextronics
December 31, 2017 - September 23, 2025
Linux-console replacement with AngularJS/Node.js; modernization of tooling.
Secodym at Secodym
December 31, 2022 - September 23, 2025
JavaFX GUI with Neo4j graph-database integration; Java/JavaFX development.
BDT at BDT
December 31, 2013 - September 23, 2025
Touchscreen HMI, PHP/C++ interfaces; project coordination via Jira/Confluence.
First Soft Solutions at First Soft Solutions
December 31, 2024 - September 23, 2025
Portfolio website PHP, responsive design, multi-language support.
Freelance Full-Stack & Web Developer at Self-employed / Freelance
January 1, 2009 - Present
Delivered end-to-end web solutions across industries, focusing on API-first design, microservices, containerization, DevOps pipelines, and responsive front-ends.
Instructor – Web Development at DCI - Digital Career Institute
August 1, 2025 - Present
Teaching modern web development focusing on full-stack technologies such as JavaScript, Node.js, HTML5, CSS3, React, Express, and MongoDB.
XML-based Trigger Management / Migration Specialist at Continental
December 31, 2016 - September 23, 2025
XML-based trigger management, MKS → IMS migration.
Production System Planning / Performance Analysis at Audi
December 31, 2015 - September 23, 2025
Production system planning and performance analysis.
Internal Angular 16 Web App Developer at Bosch
December 31, 2024 - September 23, 2025
Internal Angular 16 web app development; applying SOLID principles and design patterns; responsive UI.
Frontend/Backend Enhancements at DWS/Morgenfund
December 31, 2023 - September 23, 2025
Frontend/backend enhancements; Azure/MSSQL integration.
IBM WebSphere DevOps / Performance Tuning at Inverso
December 31, 2020 - September 23, 2025
DevOps with IBM WebSphere; performance tuning.
Java/SOAP Services Developer / DevOps at Smart InsureTech
December 31, 2018 - September 23, 2025
Java/SOAP services; DevOps management.
Full-Stack Maintenance at Fondsdepotbank
December 31, 2017 - September 23, 2025
Full-stack maintenance of financial market portal.
Linux Console Replacement at Flextronics
December 31, 2017 - September 23, 2025
Linux-console replacement with AngularJS/Node.js.
JavaFX GUI Developer / Neo4j Integration at Secodym
December 31, 2022 - September 23, 2025
JavaFX GUI; Neo4j graph-database integration; Java/JavaFX.
Touchscreen HMI / Interfaces at BDT
December 31, 2013 - September 23, 2025
Touchscreen HMI, PHP/C++ interfaces; Jira/Confluence.
Portfolio Website Development at First Soft Solutions
December 31, 2024 - September 23, 2025
Portfolio website in PHP; responsive design; multi-language.
Freelance Full-Stack & Web Developer at Self-employed / Freelance
January 1, 2009 - Present
Delivered end-to-end web solutions across industries. Core responsibilities include API-first design, microservices, containerization, DevOps pipelines, and responsive front-ends.
Teaching / Web Development Instructor at DCI - Digital Career Institute
August 1, 2025 - Present
Teaching modern web development focusing on full-stack technologies such as JavaScript, Node.js, HTML5, CSS3, React, Express, and MongoDB.
Software Engineer at Continental
December 31, 2016 - October 26, 2025
XML-based trigger management, MKS → IMS migration.
Software Engineer / Production Systems at Audi
December 31, 2015 - October 26, 2025
Production system planning, performance analysis.
Software Engineer at Bosch
December 31, 2024 - October 26, 2025
Internal Angular 16 web app, SOLID and design patterns, responsive UI.
Frontend/Backend Developer at DWS/Morgenfund
December 31, 2023 - October 26, 2025
Front-end/back-end enhancements, Azure/MSSQL.
DevOps / WebSphere Specialist at Inverso
December 31, 2020 - October 26, 2025
IBM WebSphere DevOps, performance tuning.
Java Developer / DevOps at Smart InsureTech
December 31, 2018 - October 26, 2025
Java/SOAP services, DevOps management.
Full-stack Developer at Fondsdepotbank
December 31, 2017 - October 26, 2025
Full-stack maintenance of financial market portal.
Linux Console Replacement Lead at Flextronics
December 31, 2017 - October 26, 2025
Linux-console replacement with AngularJS/Node.js.
Java / Neo4j GUI Integration at Secodym
December 31, 2022 - October 26, 2025
JavaFX GUI, Neo4j graph-database integration , Java/JavaFX.
Software / HMI Interfaces at BDT
December 31, 2013 - October 26, 2025
Touchscreen HMI, PHP/C++ interfaces , Jira/Confluence.
Freelance Web Developer at First Soft Solutions
March 31, 2025 - October 26, 2025
Portfolio Website PHP , responsive Design , multi-language.
Android Developer at Learning Machine (self-initiated project)
December 31, 2025 - October 26, 2025
Conceptualized, built, and evolved the Learning Machine app using Java/Kotlin, Android Studio, Billing API, Text-to-Speech, SQLite, and Google Play deployment.
Technical Author at Self-employed
December 31, 2024 - October 26, 2025
Wrote Principles of Programming: a Java-centric guide to Clean Code, SOLID, and KISS, complete with hands-on examples.

Education

Master of Science at Technical University at Freiberg
June 1, 2004 - November 15, 2005
Master of Science at Technical University at Freiberg
January 1, 2002 - May 1, 2005
Master of Science in Network Computing at Technical University at Freiberg
January 11, 2030 - May 1, 2005
Certificate in English Language Proficiency at Language Academy in Fort Lauderdale
January 11, 2030 - May 1, 2007
Master of Science in Network Computing at Technical University at Freiberg
January 11, 2030 - May 1, 2005
Certificate in English Language Proficiency at Language Academy in Fort Lauderdale
January 11, 2030 - May 1, 2007
Master of Science in Network Computing at Technical University at Freiberg
January 11, 2030 - May 1, 2005
Certificate in English Language Proficiency at Language Academy in Fort Lauderdale
January 11, 2030 - May 1, 2007
Master of Science in Network Computing at Technical University at Freiberg
January 11, 2030 - May 1, 2005
Certificate in English Language Proficiency at Language Academy in Fort Lauderdale
January 11, 2030 - May 1, 2007

Qualifications

Certificate in English Language Proficiency
January 11, 2030 - May 1, 2007
Principles of Programming: a Java-centric Guide to Clean Code, SOLID, and KISS
January 1, 2024 - September 23, 2025
Certificate in English Language Proficiency
January 11, 2030 - May 1, 2007

Industry Experience

Manufacturing, Financial Services, Software & Internet, Education, Professional Services, Media & Entertainment