Gunnar Hollander

Lead Software Engineer

Languages

German (native), Dutch (native), English (fluent)

Technologies

Programming Languages

Java, SQL, HTML5, CSS, XML, JSON, JavaScript, PHP

Frameworks and architectures

Spring (Boot), Hibernate, OpenSAML, Bootstrap, Swagger, SOAP, jQuery, JUnit

Development tools

IntelliJ, Eclipse, JIRA, GIT, Google Cloud, Docker, Apache Tomcat, Apache2, Ubuntu Server, MariaDB, MySQL, Oracle WebLogic, IBM WebSphere, SVN, SoapUI

Occupation

Jan 2024 - now Lead Software Engineer, Sanitas Krankenversicherung, Zürich

Oct 2022 - Dec 2023 Lead / Senior Software Engineer, CLEO AG / nu.education, Zürich

• Modelling of data structure and business processes
• Feature planning in cooperation with product owners
• Product responsibility
• Design, implementation and architecture of microservices with Spring Boot, Go and GraphQL
• Refactoring and performance optimization of existing microservices
• Contact person for backend-topics
• Reworking of authentication and authorization with Keycloak via Spring Security
• Onboarding and coaching of new developers
• Ensuring clean code principles
• Incident management
• Setting up and configuring Kubernetes clusters in Jelastic

Apr 2021 - Sep 2022 Senior Software Engineer, Health Info Net (HIN) AG / AD Swiss Net AG, Wallisellen

• Developing COVID vaccination reporting and COVID certificate service “AD Swiss Covid Impfen”
• Technical contact person for 3rd party systems
• Product and server-responsibility
• Supporting requirements engineer and project lead with application planning and risk assessments
• Integration of SAML and OAuth authentication
• Supporting and onboarding external developers
• 3rd level support

Sep 2019 - Mar 2021 Software Engineer, Health Info Net (HIN) AG / AD Swiss Net AG, Wallisellen

Apr 2017 - Aug 2019 Software Engineer, ETH Zürich, Zürich

Apr 2015 - Mar 2017 Quality Assurance Associate, SapientNitro, Zürich

Oct 2013 - Mar 2015 Junior Software Engineer, UBS AG, Zürich

Aug 2012 - Sep 2013 Internship Software Engineer, UBS AG, Zürich

Education

2012 - 2013 Kantonsschule Enge, Zürich

• Fähigkeitszeugnis (Federal VET Diploma), Informatiker EFZ

2009 - 2012 Kantonsschule Enge, Zürich

• Berufsmatura (Federal Vocational Baccalaureate), Kaufmännisch