Paul K.

Lead Flutter Developer

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Hamburg, Germany

Experience

Mar 2025 - Present
10 months

Lead Flutter Developer

Yourny Travel & Leisure

  • Full-stack mobile app development with Flutter and Serverpod for a travel platform, including booking logic, payment integration, real-time features and DevOps setup
  • Frontend/App Flutter/Dart development with BLoC state management
  • Backend & Cloud services: Serverpod integration, Firebase (Auth, Analytics, Remote Config) and real-time communication
  • Mobile platform expertise: deep linking, push notifications and platform-specific integrations
  • UI/UX & localization: custom design system, animations, localization, OpenStreetMap
  • DevOps & quality: code generation, integration tests, error monitoring with Sentry
  • Backend/Server Dart & Serverpod development for full-stack applications and real-time functions
  • Database management with PostgreSQL (3 million hotel records), Google Places API, Mollie payments and Firebase authentication
  • Tourism domain knowledge: hotel booking workflows, group trip planning, payment processing and accommodation search systems
  • DevOps & cloud: Docker containerization, VPS deployment, environment management and Sentry monitoring
  • Performance & scalability: database optimization, parallel processing and large-scale data synchronization for hotel information
Apr 2024 - Feb 2025
11 months

Senior Flutter Developer

Elea.ai GmbH

  • Developed the first MVP of a laboratory information system for medical labs
  • Implemented barcode scanner via device camera
  • Implemented document scanner via device camera
  • Collaborated closely with company leadership
  • Integrated into a top-performing team under time pressure
  • Followed agile methodology using Kanban
Dec 2023 - Apr 2024
5 months

Flutter Lead Developer

St. Leonhards

  • Took over an existing prototype
  • Coordinated and planned closely with project management
  • Integrated Apple and Google Health APIs
  • Implemented design specifications
  • Connected to internal APIs
  • Developed animations
  • Worked in an agile Kanban environment
Oct 2023 - Nov 2023
2 months

Flutter Lead Developer

Rewe

  • Implemented the recipe planner app
  • Developed local database for recipes, favorites and ingredients
  • Created responsive design for desktop, tablet and smartphone
  • Implemented animations using Flutter and Lottie
  • Integrated Rewe SSO via OAuth2 OpenID Connect
  • Automated conversion of master data from CSV to the data model
  • Followed agile Kanban methodology
Apr 2022 - Jul 2023
1 year 4 months
Hanover, Germany

Flutter Lead Developer

VetZ GmbH

  • Conceptualized, planned and implemented an app ecosystem
  • Implemented a design system in collaboration with the design team
  • Onboarded additional developers and conducted candidate interviews
  • Developed mobile apps with Flutter, Dart, BLoC, Intl and gRPC
  • Created prototypes to test various interfaces
  • Followed agile Scrum methodology
Dec 2021 - Mar 2022
4 months
Rostock, Germany

Flutter Trainer & Developer

ALTOW Digital Innovation

  • Trained, onboarded and coached the team and new hires in Flutter
  • Designed and implemented an MVP of an internal Flutter app and its architecture
  • Developed mobile apps with Flutter, Dart, Riverpod and BLoC
  • Created prototypes to test various interfaces
  • Followed agile Scrum methodology
Oct 2020 - Mar 2021
6 months
Frankfurt, Germany

Software Developer

Galeria Reisen

  • Frontend development with Angular 12, Typescript, Sass, Redux and Docker
  • Backend development with Node.js, Express.js, Typescript, Swagger and REST
  • Utilized Redis, MySQL and TypeORM for storage
  • Followed agile Scrum methodology
  • Onboarded team members
  • Launched the new application
Apr 2020 - Sep 2020
6 months
Frankfurt, Germany
On-site

Software Developer

Deutsche Bahn

  • Developed automated timetable construction for construction site operations
  • Frontend development with Angular, Typescript, HTML and SCSS
  • Backend development with Java, Spring Boot, MapStruct, JPA, Hibernate and Maven
  • Coordinated with other teams
  • Trained team on Camunda process orchestration
  • Used MariaDB, AWS and Protobuf
  • Followed agile Scrum methodology
  • Wrote tests with Cucumber and JUnit
Oct 2019 - Nov 2021
2 years 2 months
Giessen, Germany

Lead Developer

DGD Deutscher Gutachter Dienst GmbH

  • Served as tech lead, managed and onboarded new employees
  • Provided technical concept for new features
  • Developed mobile apps with Flutter, Dart and Redux
  • Developed backend with Firebase, Firestore, Cloud Functions, Typescript, Nest.js and Swagger
  • Followed agile Kanban methodology
  • Managed deployments for iOS and Android
  • Conducted usability tests with end users
Oct 2019 - Dec 2019
3 months
Frankfurt, Germany

Software Developer

Picard

  • Took over a Java legacy application for product planning, inventory management and price calculation
  • Planned reimplementation
  • Introduced Scrum development process
  • Onboarded additional developers
  • Drafted concept for future-proof reimplementation using Java, Spring Boot and Angular
Jan 2019 - Sep 2019
9 months
Frankfurt, Germany

Software Developer

Thomas Cook

  • Frontend development with Angular and Angular Universal (server-side rendering), Typescript and Redux
  • Backend development with Node.js, Express.js, Typescript, Swagger, REST and Docker
  • Focused on performance optimization
  • Integrated multiple APIs
  • Followed agile Scrum methodology
Aug 2018 - Dec 2018
5 months
Frankfurt, Germany

Software Developer

detim IT Consulting

  • Developed a web application for project and employee management
  • Frontend development with Angular and Typescript
  • Backend development with Java, Spring Boot, JPA, Hibernate and REST
  • Implemented microservice architecture
  • Used MySQL for data storage
  • Followed agile Scrum methodology
Aug 2017 - Aug 2018
1 year 1 month
Hungen, Germany

Software Developer

Vitaltec UG

  • Developed the ‘Vieva’ desktop application with C#, HTML, CSS, Javascript, Vue.js and Bootstrap
  • Implemented pulse measurement and hardware communication
  • Visualized measurement data
  • Ported core from .NET Framework 4.7 to .NET Standard
  • Enhanced data visualization
  • Conducted usability tests
  • Refactored code and planned projects
Apr 1995 - Present
30 years 9 months
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Curiosity and Commitment

  • Enthusiasm for modern technologies and sophisticated solutions
  • Ambitious problem solver

Skills

Very Good

  • Flutter
  • Dart
  • Serverpod
  • Firebase (Auth, Analytics, Remote Config, Cloud Messaging, Firestore)
  • Communication
  • Coaching
  • Leadership
  • Prompting

Good

  • Postgres
  • Docker
  • Docker-compose
  • Github Actions
  • Vps Deployment
  • Sql
  • Sentry
  • Swagger
  • Node.js
  • Nest.js
  • Express.js
  • Spring Boot
  • Jpa
  • Hibernate
  • Typeorm
  • Teamcity
  • Microservices
  • Solid.js
  • Html
  • Rest
  • Scss
  • Redis/redux
  • Cucumber
  • Camunda
  • Junit
  • Gulp.js
  • C#
  • Npm
  • Yarn
  • Gradle
  • Maven
  • Angular
  • Java
  • Typescript

Languages

German
Native
English
Advanced

Education

Mittelhessen University of Applied Sciences

Bachelor of Science · Computer Science · Giessen, Germany

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