Jochen Zink

About

Graduate computer scientist, in software development since 2007 – as a consultant, as Head of IT and freelance since 2019. I also run my own food delivery platform, LeckerLiefern, from architecture down to the receipt printer.

Skills

Backend
  • Kotlin
  • Java
  • Spring Boot
  • Spring Security
  • Hibernate/JPA
  • REST/OpenAPI
  • GraphQL
  • RabbitMQ
  • Kafka
  • Liquibase
Frontend & Mobile
  • Angular
  • React
  • Next.js
  • TypeScript
  • Android
  • iOS
Cloud & Infrastructure
  • AWS
  • Kubernetes/EKS
  • Helm
  • Docker
  • Terraform
  • Ansible
  • Traefik
  • Hetzner Cloud
  • Cloud Foundry
CI/CD
  • GitLab CI
  • GitHub Actions
  • Jenkins
  • Maven
  • Gradle
Data
  • MariaDB
  • PostgreSQL
  • Oracle
  • MS SQL Server
  • Redis
Observability
  • Grafana (Loki
  • Tempo
  • Prometheus)
  • OpenTelemetry
  • Datadog
  • Kibana
  • Splunk
Security & Identity
  • OAuth2/OIDC
  • Keycloak
  • digital signatures
AI & Ways of Working
  • Claude Code / agentic development
  • LLM integration
  • prompt engineering
  • Scrum/Kanban
  • YouTrack

Own product

LeckerLiefern – Food Delivery Platform

11/2025 – present

Founder, Architect & Lead Developer · Own product (JNK Consulting)

Design, development and operation of an online ordering platform for restaurants – from the customer shop and restaurant back office to POS and receipt printer integration. Self-hosted infrastructure instead of SaaS.

Career

  1. 06/2019 – present
    Freelance Software Engineer · JNK Consulting

    Full-time since 06/2021, alongside employment before. Projects for mid-sized companies and corporations, alongside building LeckerLiefern.

  2. 07/2019 – 06/2021
    Software Developer, Digital Lab · Insurance group

    Innovation projects in fixed three-month cycles outside the corporate process – from concept to go-live. Kotlin, Angular, Axon, Cloud Foundry.

  3. 12/2014 – 06/2019
    Head of IT · Software vendor for digital signature workflows

    IT strategy, design of business-critical interfaces, transition from waterfall to agile, rollout of a complete CI/CD environment – still with hands-on development.

  4. 09/2007 – 11/2014
    IT Consultant · Software vendor for digital signature workflows

    Independent project delivery at client sites – JEE on WebSphere, WebLogic, WildFly and Tomcat.

Education

  1. 09/2003 – 07/2007
    Diplom-Informatiker (FH), Applied Computer Science · University of Applied Sciences Hanover

    Thesis: SOA-based B2B solution for exchanging electronic documents

Training