Immanuel B. - Senior Full-Stack Developer

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Wiesbaden, Germany

Experience

Jan 2024 - Present

1 year 8 months

Wiesbaden, Germany

Senior Full-Stack Developer

SCHUFA Holding AG

Industry: Financial services
Project: VSSP
Team size: 8-10 people
Further development of features with React
Integration of React applications with GraphQL
Migration of AWS Lambdas based on Kotlin to TypeScript
Advising the team on migration strategy for moving to serverless applications
Preparation for the go-live of various projects (quality assurance, deployment, monitoring)
Deployment of applications with AWS Amplify, AWS Lambda and GitHub Actions
Technologies: AWS (Lambda, DynamoDB, CDK, Amplify, CloudWatch), React, Kotlin, TypeScript, Cypress, Selenium
Methodology: Agile development with Scrum, Kanban

Jun 2023 - Sep 2023

4 months

Cologne, Germany

Senior Full-Stack Developer

AXA Konzern AG

Industry: Insurance
Project: eCommerceShop
Team size: 8 people
Further development of frontend components with React and Redux
Migration of insurance calculators from GWT (Google Web Toolkit) to React applications
Implementation of Cypress tests
Refactoring code and advising on best practices, Clean Code and testability
Further development of interfaces with Spring Boot 2.7 and Java 8 and Java 17
Deployment of applications with ArgoCD, Red Hat OpenShift and Tekton
Technologies: AWS, Red Hat OpenShift, ArgoCD, Tekton, Java 8 and Java 17, React, TypeScript, Spring Boot, Cypress
Methodology: Agile development with Scrum, Kanban

Dec 2022 - May 2023

6 months

Ulm, Germany

Senior Full-Stack Developer

Mercedes-Benz Tech Innovation GmbH

Industry: Automotive
Project: The C
Team size: 14 people
Further development and migration of frontend components from Lit Elements to Vue 3
Creation of a test concept for the frontend
Advising on Clean Code, testability and architecture
Implementation of requirements in the backend with Kotlin and Spring Boot
Deployment of applications with Azure DevOps and Azure Pipelines
Technologies: Microsoft Azure, Kotlin, Vue 3, TypeScript, Web Components, Vitest, Playwright
Methodology: Agile development with Scrum, Kanban, Pair Programming

Apr 2022 - Apr 2022

1 month

Burghausen, Germany

Freiberuflicher Trainer

ppedv AG

Industry: E-Learning
Project: Training: React - Developing Modern UIs for the Web
Participants: 3-4 people
Teaching the React ecosystem
Introduction to basic React concepts
Development of two sample applications to explain concepts
Creation of handouts as slide decks and code repositories

Feb 2022 - Feb 2022

1 month

Burghausen, Germany

Freiberuflicher Trainer

ppedv AG

Industry: E-Learning
Project: Training: React - Developing Modern UIs for the Web
Participants: 3-4 people
Teaching the React ecosystem
Introduction to basic React concepts
Development of two sample applications to explain concepts
Creation of handouts as slide decks and code repositories

Oct 2021 - Sep 2022

1 year

Hamburg, Germany

Full-Stack Developer

OTTO GmbH & Co. KG

Industry: E-Commerce
Project: FT4 PaCMan
Team size: 10-12 people
Development and extension of AWS Lambda functions (Node.js, TypeScript, Kotlin)
Extension of AWS ECS services with Spring Boot (Kotlin) consuming data via SQS/SNS
Testing code (TDD) with Jest, JUnit, Selenium and Kotest
Development of new modules for the frontend component with HTML, TypeScript and SCSS
Maintenance and preparation for the live launch of AWS cloud infrastructure (Grafana, CloudWatch)
Infrastructure-as-Code with AWS CDK and Terraform
Data persistence with MongoDB Atlas and AWS DynamoDB
Creation of a proof of concept for modern frontend technologies
Monitoring with AWS CloudWatch and Grafana
Ensuring high availability, scalability and security of applications
Technologies: AWS, Kotlin, HTML, CSS, TypeScript, Jest, JUnit, Selenium, MongoDB, GitHub
Methodology: Agile development with Scrum, Kanban, Pair Programming, Trunk-based Development

Sep 2020 - Oct 2021

1 year 2 months

Leipzig, Germany

Full-Stack Developer

VEDA HR Cloud GmbH

Industry: Software services
Project: nuwork, OKR and engagement tool
Team size: 9-11 people
Development of the MVP for nuwork in a greenfield project
Implementation of the OKR framework with a SaaS solution
Post-release development of features, bug fixing and monitoring
Improvement of CI/CD pipelines in Bitbucket and GitLab
Building the frontend architecture with React, TypeScript, Storybook and TailwindCSS using a mobile-first approach
Testing code with Jest, Testing Library, msw and Cypress, partly TDD
Building test infrastructure for E2E tests
Creation of a test and quality concept in the frontend area
Development of microservices with Java 11, Spring Boot and Apache Kafka
Technologies: React, TypeScript, TailwindCSS, Styled Components, Jest, Testing Library, Cypress, ESLint, Java 11, Spring Boot, Kafka, Jira, Confluence, Bitbucket, PostgreSQL, MongoDB
Methodology: Agile development in a cross-functional team with Scrum, Kanban, OKR

Apr 2020 - Sep 2020

6 months

Leipzig, Germany

Full-Stack Developer

VEDA GmbH

Industry: HR/Recruiting
Project: VEDA Horizon, HR software for personnel management
Team size: 7-10 people
Further development and maintenance of VEDA Horizon
Development with Java 8, Thymeleaf, jQuery and LESS
Refactoring the administration interface due to product realignment
Creation of a concept for modernizing the frontend
Migration from jQuery to React
Migration from RequireJS to Webpack
Migration from AMD to ES6
Implementation of DevOps principles with Jenkins to create test environments and release product increments
Technologies: Java 8, Spring, Thymeleaf, jQuery, LESS, Bootstrap, Jenkins, Docker, JRebel, PostgreSQL
Methodology: Scrum and Kanban, Pair Programming, Mob Programming, TDD, BDD

Mar 2019 - Apr 2020

1 year 2 months

Leipzig, Germany

Werkstudent und Junior Developer

Saxess AG

Industry: Public sector, participation management
Project: fidas, participation management for municipalities
Team size: 4-5 people
Creation of a proof of concept dashboard for fidas
Bug fixing and maintenance of the overall product
Extension of existing features
Frontend development with Vaadin 10
Backend development with Java 8, Spring 4 and Hibernate
Technologies: Vaadin 10, Java 8, Spring, Hibernate, PostgreSQL, Apache Tomcat
Methodology: Pair Programming and TDD

Summary

Focus: JavaScript/Frontend developer focusing on React, TypeScript, and Node.js
Focus: Good Java/Kotlin/JVM backend skills and interest in architecture topics
Focus: Development of high-quality products that can handle heavy user loads
Focus: Solid DevOps knowledge
Programming languages: JavaScript, TypeScript, Kotlin, Java 8-17
Other languages: HTML, CSS, LESS, SCSS
Libraries/Frameworks: React, Vue 3, Redux, jQuery, Node.js, Spring Framework, Vaadin, Hibernate, Bootstrap, TailwindCSS
Frontend methodology: Responsive, Atomic Design, mobile-first, server-side rendering
Databases: PostgreSQL, MongoDB, DynamoDB
Testing: Jest, Vitest, Cucumber, JUnit, Kotest, Selenium, Cypress
DevOps: GitHub Actions, Bitbucket, AWS, Docker, Azure DevOps, Azure Pipelines, Red Hat OpenShift, ArgoCD, Tekton
Methods: Scrum, Kanban, Pair Programming, Clean Code, SOLID, KISS, DRY/WET, Trunk-based Development