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I'm Joshua Hirsch, a Senior Software Engineer and Application Manager with 7+ years of experience designing, modernizing, and operating enterprise and mission-critical systems. I specialize in Java backend development, legacy application server migrations (JBoss, WebSphere), cloud-native architectures, and Kubernetes-based platforms. I combine hands-on engineering with product ownership, DevSecOps practices, and experience working in regulated environments such as critical infrastructure. I lead modernization roadmaps, migrations to Java 17/21, and Quarkus-based architectures, and I thrive in cross-functional teams delivering secure, reliable software.…I'm Joshua Hirsch, a Senior Software Engineer and Application Manager with 7+ years of experience designing, modernizing, and operating enterprise and mission-critical systems. I specialize in Java backend development, legacy application server migrations (JBoss, WebSphere), cloud-native architectures, and Kubernetes-based platforms. I combine hands-on engineering with product ownership, DevSecOps practices, and experience working in regulated environments such as critical infrastructure. I lead modernization roadmaps, migrations to Java 17/21, and Quarkus-based architectures, and I thrive in cross-functional teams delivering secure, reliable software.

Joshua Hirsch

Full Stack Developer, Back-End Developer, Web Developer, +6

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I'm Joshua Hirsch, a Senior Software Engineer and Application Manager with 7+ years of experience designing, modernizing, and operating enterprise and mission-critical systems. I specialize in Java backend development, legacy application server migrations (JBoss, WebSphere), cloud-native architectures, and Kubernetes-based platforms. I combine hands-on engineering with product ownership, DevSecOps practices, and experience working in regulated environments such as critical infrastructure. I lead modernization roadmaps, migrations to Java 17/21, and Quarkus-based architectures, and I thrive in cross-functional teams delivering secure, reliable software.…I'm Joshua Hirsch, a Senior Software Engineer and Application Manager with 7+ years of experience designing, modernizing, and operating enterprise and mission-critical systems. I specialize in Java backend development, legacy application server migrations (JBoss, WebSphere), cloud-native architectures, and Kubernetes-based platforms. I combine hands-on engineering with product ownership, DevSecOps practices, and experience working in regulated environments such as critical infrastructure. I lead modernization roadmaps, migrations to Java 17/21, and Quarkus-based architectures, and I thrive in cross-functional teams delivering secure, reliable software.

Available to hire

I’m Joshua Hirsch, a Senior Software Engineer and Application Manager with 7+ years of experience designing, modernizing, and operating enterprise and mission-critical systems. I specialize in Java backend development, legacy application server migrations (JBoss, WebSphere), cloud-native architectures, and Kubernetes-based platforms.

I combine hands-on engineering with product ownership, DevSecOps practices, and experience working in regulated environments such as critical infrastructure. I lead modernization roadmaps, migrations to Java 17/21, and Quarkus-based architectures, and I thrive in cross-functional teams delivering secure, reliable software.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

German

Fluent

English

Fluent

Work Experience

Application Manager at Swissgrid AG – Transmission System Operator (CH / EU)

March 1, 2025 - Present

End-to-end technical and product-oriented ownership of multiple mission-critical applications within European energy infrastructure. Acts as technical decision authority on architecture, prioritization, and delivery, coordinating maintenance, operations, and modernization with development teams. Ensures stable 24/7 operations in a regulated environment. Leads vulnerability management and security hardening for production systems. Defines modernization roadmaps, including migration from Java 11/JBoss 7 to modern Java (17/21) and Quarkus-based architectures. Hands-on implementation of microservice features in containerized Kubernetes environments.

Backend & Cloud Engineer at Freelancer

April 1, 2024 - Present

Back-end and cloud development for a real-time, cloud-native stock trading application. Design and implementation of scalable Java-based back end services. Takeover, migration, and long-term maintenance of production web-facing applications as part of broader back end and cloud solutions. Lecturer and workshop leader for Java, GitHub, Docker, prompt engineering, and software engineering fundamentals.

Senior Cloud Engineer at Thinkport GmbH

April 1, 2022 - March 1, 2024

Migration of Java applications from IBM WebSphere to Open Liberty, including containerization and Kubernetes deployment. Java platform upgrades (Java 8 → 17) with focus on long-term maintainability. Design and implementation of CI/CD pipelines using Azure DevOps. Infrastructure provisioning and environment automation using Terraform.

Software Developer at Lufthansa Industry Solutions GmbH

June 1, 2019 - March 1, 2022

Core developer for enterprise logistics and sales back-end systems. Sole technical responsibility for a critical Java back end application. Support of customers during cloud migration and architectural modernization initiatives.

Software Developer / Bachelor Thesis at Medical Technology

January 1, 2018 - January 1, 2019

Bachelor thesis: Big Data Analytics with medical technology in emergency services.

Application Manager at Swissgrid AG – Transmission System Operator

March 1, 2025 - Present

End-to-end technical and product-oriented ownership of mission-critical applications in European energy infrastructure. Acts as the technical decision authority across architecture, prioritization, and implementation, coordinating development teams across maintenance, operations, and modernization initiatives. Ensures stable, secure 24/7 operations in a highly regulated environment. Leads vulnerability management and security hardening for production systems. Defines and executes modernization roadmaps, including migration from Java 11 / JBoss 7 to modern Java (17/21) and Quarkus-based architectures. Hands-on implementation of microservice features in containerized Kubernetes environments.

Backend & Cloud Engineering Freelancer at Freelancer

April 1, 2024 - Present

Back-end and cloud development for real-time, cloud-native stock trading applications. Design and implementation of scalable Java-based back-end services. Takeover, migration, and long-term maintenance of production web-facing applications as part of broader back-end and cloud solutions. Lecturer and workshop leader for Java, GitHub, Docker, prompt engineering, and software engineering fundamentals.

Software Developer at Lufthansa Industry Solutions

June 1, 2019 - March 1, 2022

Core developer for enterprise logistics and sales back-end systems. Sole technical responsibility for a critical Java back-end application. Support of customers during cloud migration and architectural modernization initiatives.

Software Developer / Bachelor Thesis at corpuls – Medical Technology

January 1, 2018 - January 1, 2019

Bachelor thesis: Big Data Analytics with medical technology in emergency services.