Freelancer profile translated to English.

Description

In recent years, Steffen has successfully planned and implemented projects in the areas of web applications, digitalization of processes, and agile project management. With profound experience in software development (Java, Oracle, Spring Boot, Application Servers) and go-live with modern DevOps methods (Docker, Ansible, Terraform, Jenkins, OpenShift), he brings comprehensive knowledge of modern frontend and backend technologies, as well as their testing. Knowledge in cryptography (SAML, JWT, Okta, Keycloak) completes his profile.

Thanks to his commitment, Steffen understands the team's needs regarding functional requirements and technical quality. Through proactive communication with stakeholders, he regularly achieves excellent results with high business value.

For some time now, he has been combining this approach with agile methods such as Scrum. His expertise in Clean Code, software architecture, TDD, and the programming languages Java and PHP underscores his competence as a Full-Stack Software Engineer.

Languages

German
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Lutherstadt Wittenberg (up to 50km)

Diag MAV
Senior Fullstack Developer, System Operator
December 2023 - December 2024 (1 year and 1 month)
Wittenberg, ST, Germany
• Development and deployment of proprietary organizational software for the employees and facilities of Diag MAV in Berlin.
• The entire IT infrastructure is being renewed at the media company Druck + Medien Mundschenk. Hardware servers are being converted into virtual machines, the firewall is being replaced, and employees are being trained in IT security.
• In-house development of an online shop with Spring Boot microservices in conjunction with Elasticsearch and a decoupled frontend. Connection to external services such as Instagram, Adyen, and PayPal as payment service providers.

Methods and technologies used: VMware | Windows Server | Docker, LAMP | Java | Spring Boot | Ansible, MS SQL Server | Elasticsearch | Adyen REST API | PayPal REST API
DB Netze
Senior Java Developer at
April 2023 - November 2023 (7 months)
Frankfurt, HE, Germany
• Additional software modules were programmed for the management software as part of the "Moderne Schiene" project.
• Creation of microservices in Docker containers.
• Data migration from relational databases using Flyway.
• Deployment of containers with Ansible.

Methods and technologies used: SonarQube | Nexus | Git | Bitbucket | Maven | Java | JavaFX | Spring Boot | JWT | Nexus | IntelliJ | Docker | Ansible | Oracle DB | Flyway | Dovecot | Scrum
der Bundesagentur für Arbeit
Senior Java Developer
November 2022 - March 2023 (4 months)
Nuremberg, BY, Germany
• Further development of the platform software for the virtual job market.
• Implementation of requirements in a special Domain-Specific Language (DSL) and execution of tests.

Methods and technologies used: SonarQube | Git | Maven | Java | Spring Boot | Nexus | Eclipse | Oracle | Scrum