Hans-Peter Martini - Developer

Recommended expert

Neukirchen, Germany

Experience

Sep 2022 - Apr 2024

1 year 8 months

Developer

IT Center of the Federal Employment Agency

Developing event-driven microservices with REST controllers and services
Mapping data with JSON models
Producing and consuming Kafka streams
Generating PDFs
Developing smart components, services, guards
Processing the REST stream using observables following the reactive programming paradigm
Integrating web components
Implementing user authentication using OIDC/OAuth2 and JWTs
Integrating Keycloak for simplified identity provider connection and introducing two-factor authentication
Creating mockups for planning, implementation analysis, and feasibility studies
Analyzing and implementing business requirements
Conducting code reviews
Maintaining and updating CI/CD pipelines
Performing refactorings
Conducting sprint reviews
Monitoring production applications via Kibana and Grafana

Jan 2022 - Jul 2022

7 months

Architect, Developer, Coach, Consultant

Federal Printing House GmbH

Technical lead of the development team
Developing an argument for re-implementing the existing application with Vue.js
Planning the architecture and implementing components and application structure
Defining the project structure and style guide
Defining coding standards
Introducing Redux in the frontend and coaching the team
Defining a view model based on an eForms abstraction (European standard for exchanging tenders)
Developing methods to optimize local development environments
Optimizing backend code according to hexagonal architecture
Defining the database structure
Implementing REST endpoints for user login using authentication via ELSTER (OAuth2)

Jul 2021 - Oct 2021

4 months

Developer, Architect, Coach, Consultant

Emil Frey

Planning, architecture, and development of submodules for a platform to buy and sell vehicles
Implementing custom components for a customer-developed component library
Coaching staff on using Angular and adhering to clean code and common programming principles
Training and sharing best practices and Angular knowledge
Advising IT management on optimizing the development process
Delegating SEO optimization to an external service provider

May 2020 - May 2021

1 year 1 month

Developer, Founder, CEO, Architect, DevOps Engineer

Own Project (Online Marketing)

Feasibility studies
Requirements analysis
Architecture design
Implementing the MVP
Selecting and setting up a cloud-based backend
User management via Firebase Authentication with JWT
Storing data in FireStore
Reporting
Implementing a funnel page and application form

Mar 2020 - Jun 2021

1 year 4 months

Developer

BG-Phoenics GmbH (IT Center of BG Bau)

Migrating the existing application to a monorepo (Nx)
Re-implementing old components and services
Implementing a sustainable architecture, coding standards, and common programming principles
Refactoring and extracting shared components and services into a library
Introducing an NgRx store with the facade pattern
Negotiating REST APIs with the backend
Connecting microservices via REST interfaces
Developing unit tests with Jest

Oct 2018 - Dec 2019

1 year 3 months

Developer

SMA Solar Technology AG

requirements analysis and preparation of Scrum tickets
implementation of components for applying and displaying filter inputs
extension of the test backend
extension of API endpoints for database operations
writing unit tests
code reviews

Sep 2018 - Dec 2019

1 year 4 months

Developer

SMA Solar Technology AG

requirements analysis and preparation of Scrum tickets
refactoring project structure and optimizing data flow
introduction of interfaces
implementation of a module for hardware communication and control (Modbus and SunSpec protocols for RS485 and TCP)
API extension with Swagger
writing unit tests
code reviews

Sep 2018 - Sep 2018

1 month

Developer, Team Lead

Taxi Portal Project

requirements analysis and preparation of Scrum tickets
implementation of a microservice for retrieving and delivering scraping data
negotiating data formats provided by the scraping API
parsing, storing and providing the data
defining the API for retrieving the data
implementing endpoints for retrieving the data
writing unit tests
code reviews
client communication
team leadership

Aug 2018 - Aug 2018

1 month

Developer

4Mular

improving code quality by applying common programming principles
writing unit tests
code reviews

Oct 2017 - Jul 2018

10 months

Developer, Consultant

Facto

selecting and implementing a rights and roles system with Voters
refactoring the application to use the base system
consulting on and implementing a state machine based on decorator and visitor patterns
designing and implementing the database structure, repositories and services
creating fixtures to populate the database with test data
creating a Docker Compose script for a consistent local environment
writing unit tests
code reviews

Sep 2017 - Sep 2017

1 month

Developer, Mentor, Coach

timeBuzzer GmbH

Requirements analysis and customer communication
Design and implementation of a stateless microservice to link time tracking tools and project management platforms
Database design and implementation of an import module (webhook-based)
Building internal and external data models and parsing consumed data
Providing the parsed data to the client system
Designing the login UI and minimal user management
Writing unit tests
Code reviews
Coaching and handing over to interns

Jul 2017 - Jul 2017

1 month

Developer

Own project (Container management)

Requirements analysis and debugging of faulty container provisioning for a code analysis platform
Selecting suitable technologies and libraries
Implementing a daemon as a client/server application to provide Docker machines in an LXC environment

Apr 2017 - Apr 2017

1 month

Developer

Own project (CI platform matching component)

Requirements analysis
Design and implementation of a context-based matching algorithm
Code profiling for performance bottlenecks
Writing unit tests

Feb 2017 - Feb 2017

1 month

Developer

Own project (VNC recording CI platform)

Requirements analysis
Evaluating and selecting a suitable codec and settings for FFMPEG
Capturing and compressing the XServer output
Automatic upload of the recording data to AWS-EC3
Providing and displaying the stored stream on the web platform

Jan 2017 - Jan 2017

1 month

Developer

Own project (VNC browser view CI platform)

Requirements analysis
Evaluating and adapting noVNC for the CI platform
Implementing a reverse proxy as a Node.js application
Serving the stream via noVNC in the browser

Nov 2016 - Sep 2017

11 months

Developer

Own project (CI platform)

Requirements analysis and customer communication
3rd level support
Implementation of various features and bug fixes
Writing unit tests and UI tests
Documentation and updating the platform documentation

Feb 2015 - Oct 2016

1 year 9 months

Developer, Admin

Own company (Tourism)

Development of web applications for managing master and travel data
Requirements analysis, design, and coordination with customers
Implementation of frontend, backend, and databases
Testing (unit and manual)
Consulting and deployment of the web application

Feb 2015 - Oct 2016

1 year 9 months

Developer, Team Lead

Own company (Tourism)

Requirements analysis and design to replace a legacy smart client application
Implementation of the desktop application and databases
Testing (unit and manual)
Consulting with management and customers

Feb 2015 - Oct 2016

1 year 9 months

Developer, Team Lead, Technical Project Manager, Technical Strategy Consultant

Own company (Tourism)

Requirements analysis and coordination with the customer
Design, implementation, and testing of an external print system
Consulting and commissioning with external service provider

Jan 2015 - Jun 2015

6 months

Project management

Own company (Tourism)

Resource, budget, and capacity planning
Monitoring ongoing processes
Coordination with service providers
Scheduling downtime and preparing systems

Aug 2011 - Oct 2016

5 years 3 months

Developer

Own company (tourism)

Continuous development of the desktop application for flight refund processing with WinFormsUI
Manual SQL queries for individual customer requests

Aug 2011 - Oct 2016

5 years 3 months

Developer

Own company (tourism)

Development of an end-customer platform for viewing travel information
Requirements analysis, planning, and coordination with clients
Implementation of frontend, backend, and databases
Testing (unit and manual)
Consultation and delivery of the web application

Aug 2011 - Oct 2016

5 years 3 months

Developer, Admin, Team Lead

Own company (tourism)

Continuous development of smart client applications with WinForms UI for generating printed and electronic travel documents and invoices
Implementation of scheduled server-based jobs and Aztec code generation for rail-and-fly tickets
Maintenance and calibration of production printers
Server administration and deployment
Recruiting and team leadership

Skills

Focus Areas

Analysis, Design, Architecture
Enterprise Software Development
Typescript, Javascript, Kotlin, Java
Vue.js, Angular, React(native), Node.js, Spring Boot
Agile Methods

Formal Languages

Typescript, Javascript, Kotlin, Java, Go, Python, Shell Scripting, Css, Sass

Frameworks

Angular, Vue, React, Spring Boot, Express, Hibernate, Flyway

Databases

Postgresql, Mysql, Ms Sql Server, Oracle, Firestore, Mongodb

Architecture Concepts

Hexagonal Architecture, Onion Architecture, Clean Architecture, Single-page Applications, Microservices, Micro-frontends, Self-contained Systems, Monorepos

Methods/processes

Agile Methods, Scrum, Kanban

Paradigms

Event-driven Programming (Rabbitmq, Apache Kafka), Domain-driven Design, Clean Code, Tdd, Reactive Programming (Redux, Ngrx, Rxjs)

Devops

Gitlab Ci, Github Actions, Jenkins, Sonarqube, Docker (Compose), Kubernetes, Openshift, Google Cloud Platform, Firebase, Azure, Kvm, Libvirt/virsh, Vagrant, Chef, Lxc, Docker-machine, Boot2docker, Bash, Zsh, Sh

Monitoring

Kibana, Elastic Search, Grafana

Build Systems

Npm, Maven, Gradle, Bnd, Webpack, Angularcli

Testing

Jest, Jasmine, Junit, Selenium, Playwright, Cucumberjs, Behat, Karma

Tools

Git, Jira, Confluence, Visual Studio Code, Youtrack, Swagger

Web/application Servers

Apache, Nginx, Iis, (Node.js)

Operating Systems

Linux (Ubuntu, Arch, Debian), Mac Os X

Development Environments

Intellij Idea, Eclipse, Netbeans

Languages

German

Native

English

Advanced

Education

Fulda University of Applied Sciences

Applied Computer Science · Fulda, Germany

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Skills

Languages

Education

Fulda University of Applied Sciences

Applied Computer Science · Fulda, Germany

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