Co-Founder & CTO
(10-50 Mitarbeiter)
Schlagwörter
Springboot
Spring Framework
AngularJS
Docker
CSS
J2EE
Git
Apache Kafka
Graphql
Microservices
Skills
12+ years of experience as software engineer and 9+ years as entrepreneur. Worked in different industries (utilities, e-commerce, corporate education), team sizes (corporate, scaleup, startup, solo), and tech-stacks (monolithic Java EE, scalable Spring Boot & Angular in Docker, Spring Boot Microservices with Kubernetes & Kafka, Serverless with AWS) in diverse teams, both fully remote and hybrid. Effective top-down communicator and hands-on collaborator who contributed in different roles (Full-Stack Engineer, Tech- / Product Lead, Agile Coach).
Current Tech-Stack: Serverless
AWS Services
Former Tech-Stack: Spring Boot (Microservices)
Spring Framework
Current Tech-Stack: Serverless
AWS Services
- Lambda
- EventBridge
- CodeBuild
- CodePipeline
- CloudFormation & CDK DynamoDB
- OpenSearch Service (ElasticSearch) API Gateway
- CloudWatch Amplify
- AppSync (GraphQL) Secrets Manager Route53
- S3
- CloudFront IAM
- Cognito
- Step Functions SNS / SQS
- Typescript
- Node.js (in Lambda) Angular & SCSS
- NGXS State Management GraphQL
- Jest Testing
- CDK Deployment
- Git & Github
- GPT
Former Tech-Stack: Spring Boot (Microservices)
Spring Framework
- Spring Boot
- Spring Data
- Rest
- JDBC
- JPA
- Spring Cloud
- Consul
- Stream
- Security
- Zookeeper
- Spring HATEOAS
- Spring Security
- Docker, Docker Compose, Nginx, Jenkis
- Kafka, Kubernetes
- PostgreSQL
- Java / Groovy / Kotlin
- Java EE / Spring (Boot)
- JUnit, TestNG, Spock
- Liquibase
- Angular & SCSS
- Git & Gitlab
Projekthistorie
05/2019
-
10/2023
Team: 2-6 full-stack engineers engineers, 1 Designer, 1 Product Owner
Client: VC-funded startup (Seed-Stage)
What: (Disclosed)
CTO
Technologies
(excerpt)
Client: VC-funded startup (Seed-Stage)
What: (Disclosed)
CTO
- Grew engineering team from 2 to 6 engineers
- Started with the (back then) completely new architecture and built a very robust and scalable system Worked in close collaboration with CPO
- Planned third-party integrations
- Led architecture discussion- & decision processes
- Maintained a continuously high velocity while keeping a healthy pace as a team - at least every 2 weeks an increment has been shipped while single features have been deployed continuously (using feature-flags)
- Integrated GenAI Features within 8 weeks after public launch of GPT
- Setup and maintained the project with IaC using Cloud Formation
- Introduced new AWS Services where necessary
- Contributed individually to the code-base on a regular basis besides management obligations
- Developed new features end-to-end in backend & frontend
Technologies
(excerpt)
- Serverless backend stack on AWS
- Node.js (in Lambda)
- Angular & SCSS
- NGXS State Management GraphQL (AppSync)
- GPT
10/2017
-
12/2019
Project Lead & Full-Stack Engineer
(Transport und Logistik, >10.000 Mitarbeiter)
Team: 2 Full-Stack Engineers, 3 App Developers, 1 Designer, 1 Product Owner
Client: Large german public transportation provider
What: Extension of the public transportation app I had been working on before with in-app booking functionality for call-sharing cabs, user management and connection to third-party system
Project Lead
Client: Large german public transportation provider
What: Extension of the public transportation app I had been working on before with in-app booking functionality for call-sharing cabs, user management and connection to third-party system
Project Lead
- Took over the project full-service, recruited 3 App Developers as sub contractors and 1 Product Owner as permanent employee
- Moved application to new AWS account
- Took over role of Scrum Master (in absence of a dedicated one)
- Added user & role management for administration frontend
- Connected of third-party system for call-sharing cab bookings
- Added configuration of custom fare schemes depending on the administrative districts Introduced a responsive web-version of the app
- Allowed Point-of-Interests to be configured per district
- Introduced real-time updates to train- & bus connections
02/2017
-
09/2017
Backend Engineer
(Konsumgüter und Handel, 250-500 Mitarbeiter)
Team: 4 engineers, 1 Product Owner, 1 scrum master - in total equally sized teams ~40 teams
Client: Digital spin-off of a large german grocery store
What: Built micro-services to add automated & manual product recall options to the system including customer notification via email and website
Backend Engineer
Technologies
Client: Digital spin-off of a large german grocery store
What: Built micro-services to add automated & manual product recall options to the system including customer notification via email and website
Backend Engineer
- Setup of the project, introduced various technologies
- Collaborated closely with teams of which we consumed their services
Technologies
- Microservices with Spring Boot
- Unit tests with Spock
- Kafka Consumer & Producer with Spring Cloud Stream
- Logging & Monitoring:
- ELK, Prometheus
- Grafana Dashboards
- Deployment
- Automated deployment pipeline with frequent rollout to production (Continuous Delivery)
06/2016
-
10/2016
Fullstack Engineer
(Transport und Logistik, >10.000 Mitarbeiter)
Team: 2 Full-Stack Engineers, 2 App Developers, 1 Designer
Client: Large german public transportation provider
What: Extension of a public transportation app (existing code-base from MVP) that is specifically designed for the needs of rural areas
Fullstack Engineer
Technologies
Client: Large german public transportation provider
What: Extension of a public transportation app (existing code-base from MVP) that is specifically designed for the needs of rural areas
Fullstack Engineer
- Connected to external timetable system
- Add administration frontend so that stakeholders can add new tenants (public districts) without developers
- Added unit and integration tests to existing code-base and introducing monitoring and alerting
Technologies
- Modular API backend, Groovy / Spring
- Unit tests with Spock
- Web frontend with client-side rendering using JavaScript framework AngularJS 1.5.
- Deployment
- Automated deployment pipeline with frequent rollout to production (Continuous Delivery) Scalable multi server zero-downtime deployment to multiple environments (Staging, Production)
- Worked in “You Build It, You Run It” mindset with developers as DevOps
10/2015
-
02/2016
Project Lead & DevOp
(Energie, Wasser und Umwelt, 1000-5000 Mitarbeiter)
Team: 2 Backend Developers, 2 Full-Stack Developers, 1 Designer, 1 tester
Client: Utility Company
What: Development of an modular checkout system from scratch that can be configured for all different products of a utility company (power, gas, internet) with individual campaigns and bonus programs.
Project Lead
Client: Utility Company
What: Development of an modular checkout system from scratch that can be configured for all different products of a utility company (power, gas, internet) with individual campaigns and bonus programs.
Project Lead
- Created conceptual design of the software architecture
- Design of the API-Guideline
- Coached other developers
- Collaborated closely with Product Owner & customer for additional connections of legacy systems
- Setup of automated deployment pipeline for CI/CD with Jenkins to Unix-based virtual servers
- Usage of docker containers for platform-independent build of application artifacts
09/2014
-
09/2015
Project Lead & Backend Developer
(Energie, Wasser und Umwelt, 10-50 Mitarbeiter)
Team: 2 Backend Developers, 2 Frontend Developers, 2 App Developers, 1 Designer
Client: VC-funded Startup (Seed-Stage)
What: Development of an app from scratch that allows customers to track their individual power consumption and gives utility providers additional customer segmentation options for targeted offers
Project Lead
Client: VC-funded Startup (Seed-Stage)
What: Development of an app from scratch that allows customers to track their individual power consumption and gives utility providers additional customer segmentation options for targeted offers
Project Lead
- Managed the project and development processes
- Created Conceptual design of a multi-tenant software architecture
- Coached other developers
- Coordinated of external App Developers
- Setup of the development environment
- Spring Boot, Liquibase
- PostgreSQL
- Deployment
- Automated execution of unit tests
- Automated deployment with Jenkins
Reisebereitschaft
Nur Remote verfügbar
