Work

Two things I build on my own. On top of that, more than ten years building for others. Every stop has its own page, and the whole career is searchable.

Own products

heftediOS · betaPaperwork, filed and found again. An iPhone app that reads and sorts receipts, letters and vouchers. Everything runs on the device, no account, no server. Idea, design and code are mine.

estimarloWeb · livePlanning poker for sprint planning. Free and no signup, the voting runs in real time. Built with the stack I like: Java, Spring Boot, Angular.

Career

[001]SmartOfficeSUSI&James2023A web-based cloud platform for AI-driven phone conversations. Digital coworkers take calls, capture requests, answer questions and book appointments, with transcripts and real-time analytics.AI voicebot platform · Python · FastAPI · React · +11 [002]Smart Production Planningobj. partner2020A production planning system for making contact lenses on several lines. It sharpens the planning and takes effort off the planners, with a clearer view across the lines.World market leader for contact lenses · Java · TypeScript · Spring Boot · +7

[003]Digital Platformobj. partner2016Extending, maintaining and running the club's digital platform, online and in the back offices.Germany's record-title football club · JavaEE · JavaScript · TypeScript · +12 [004]Smart Production Organisationobj. partner2022A calendar and scheduler for organizing production planning across departments.World market leader for contact lenses · Java · TypeScript · Spring Boot · +7 [005]ACC360obj. partner2021An application to reconcile data between a REST interface and a local database.A Japanese car maker · Java 11 · Spring Boot · Maven · +5 [006]XRechnungobj. partner2020A service that generates digital invoices conforming to the XRechnung standard.A Japanese car maker · Java · Spring Boot · JPA · +7 [007]Storage for Science (bwSFS)obj. partner2020Managing file and object storage for university research projects.An IT service provider · Java · TypeScript · Spring Boot · +7 [008]ZUGFeRDobj. partner2019A digital invoicing service. Raw SAP data was archived as PDF/A-3 in the ZUGFeRD format and served to dealers in a web portal.A Japanese car maker · Java · TypeScript · HTML · +6 [009]KPI Analyzerobj. partner2019Extending a tool that checks the technical maturity of SAP systems.A management consultancy (SAP) · Java · TypeScript · HTML · +7 [010]Email Service and Template Builderobj. partner2019Sending transactional email and managing email templates.An insurance group · Java · TypeScript · HTML · +8 [011]Identity Serviceobj. partner2019Bringing several identity providers into one interface to pick from when confirming identity.An insurance group · Java · TypeScript · HTML · +7 [012]Quitch-AppQuitch2019Reworking and extending an app for schools: a content-agnostic quiz platform to raise engagement outside of class time.E-Learning app · TypeScript · Angular · Ionic · +6 [013]Payment Serviceobj. partner2015Payment processing through the club's web shop.Germany's record-title football club · JavaEE · JavaScript · AngularJS · +7 [014]Sports Domainobj. partner2015Software for coaches, doctors and therapists to record appointments, illnesses and player data.Germany's record-title football club · JavaEE · JavaScript · AngularJS · +6 [015]SSOobj. partner2015A single sign-on solution for central login across several web applications.Germany's record-title football club · JavaEE · JavaScript · AngularJS · +7

Employment

07.2023 todaySUSI&James GmbHLead Developer
10.2015 03.2023objective partner AGSenior full-stack developer and consultantConsultancy. The client projects from this time appear anonymized above.
05.2019 07.2019Quitch (Australien)Full-stack developer
2012 2015VMT Vision Machine Technic · Pepperl+Fuchs GmbHDual study placement and working student

Education

10.2012 10.2015DHBW MannheimCooperative degree, applied computer science (business information management), B.Sc.
08.2009 06.2012Technisches Gymnasium BBS T1 LudwigshafenAbitur (secondary school leaving certificate)

Languages

German C2 · NativeEnglish C1 · FluentPolish B2 · Fluent

What I work with

Languages and backend

Java · Spring Boot · TypeScript · Python · FastAPI · C# · PHP/Laravel · Hibernate/JPA · REST und SOAP · PostgreSQL · MSSQL · MySQL · Flyway · JUnit 5 · Mockito

Frontend, mobile and UX

Angular · React · AngularJS · Swift/SwiftUI · Ionic · Flutter/Dart · HTML · CSS/SCSS · Bootstrap · Responsive Design · PWA · UI Design · ISO 9241-210

Architecture and methods

Software-Architektur · Microservices · Clean Code · Design Patterns · TDD · Unit/Integration/E2E-Testing · Refactoring · Requirement Engineering · UML · Scrum (Scrum Master) · Kanban · SAFe

AI and real-time

LLMs / OpenAI · Speech-to-Text · On-Device AI (Apple Intelligence) · NATS · Redis · RabbitMQ · Vonage · Twilio

DevOps, tooling and platforms

Docker/Compose · Kubernetes · Helm · Rancher · CI/CD · Git · Linux · Nginx · Keycloak/OIDC · ELK-Stack · AWS · Azure · Google Cloud · Hetzner · IntelliJ IDEA · VS Code · Jira/Confluence