Frontend Senior Developer
Michael
Mannseicher
I am
36
years old. Working student, engineer, Scrum Master, founder — I have built products and the teams around them, and the company I founded taught me the most.
I am Full-Stack developer
30 random technologies, frameworks and tools I have already worked with
logo angular
angular
logo angularJS
angularJS
logo apache-ant
apache-ant
logo apache-camel
apache-camel
logo apache-kafka
apache-kafka
logo apache-maven
apache-maven
logo asciidoc
asciidoc
logo aws-api-gateway
aws-api-gateway
logo aws-cloudfront
aws-cloudfront
logo aws-cloudwatch
aws-cloudwatch
logo aws-dynamodb
aws-dynamodb
logo aws-ec2
aws-ec2
logo aws-iam
aws-iam
logo aws-lambda
aws-lambda
logo aws-rds
aws-rds
logo aws-route53
aws-route53
logo aws-s3
aws-s3
logo aws-sns
aws-sns
logo aws
aws
logo azure
azure
logo babel
babel
logo bitbucket
bitbucket
logo bower
bower
logo browserslist
browserslist
logo c-sharp
c-sharp
logo c
c
logo caddy
caddy
logo cassandra
cassandra
logo commitlint
commitlint
logo cpp
cpp

Professional Experience

Since 11/2024
Senior Software Engineer
Full-time, doctari group

Full-stack engineer on doctari pro, the B2B platform on which clinics and the doctari sales team staff medical shifts with locum doctors and nurses. Work runs end-to-end, from a React and TypeScript frontend to a serverless Node.js backend on AWS (Lambda, DocumentDB, OpenSearch, Kafka, CDK). Projects range from candidate matching and search, shift planning and pricing logic, to internal sales tooling and integrations such as the Salesforce synchronization.

Technologies

React, TypeScript, Node.js, AWS Lambda, AWS CDK, Serverless, DocumentDB, OpenSearch, Kafka, Salesforce, Figma
06/2020 - 06/2023
Senior Software Engineer
Full-time, ClimatePartner GmbH

Responsible for complex forms with validation and i18n in React with Material-UI, as well as close collaboration with design teams in Figma. Backend development with Node.js (Fastify, NestJS) and integration of OpenID Connect. Use of AWS (S3, Lambda, CloudFront) and Docker, as well as PostgreSQL for data management. Logging and monitoring with Datadog, transactional emails with MJML, TDD for code quality, and CI/CD pipelines with GitHub Actions. Work in agile Scrum teams with Jira, onboarding of new team members, and involvement in recruiting.

Technologies

React, Typescript, Gatsby, Contentful, Firebase, DataDog, ConfigCat, Miro, Atlassian Jira, Node.js, NestJs, Express, Fastify, Github Actions, Terraform, PostgreSQL, MongoDB
Since 06/2020
Co-Founder and Lead Frontend Engineer
MilkScout GmbH

Co-founder of a B2B trading platform for liquid dairy products. Responsible for all frontend development with React and TypeScript, including the implementation of the design specifications. Infrastructure on AWS, defined as code with AWS CDK, and CI/CD pipelines with GitLab CI for automated builds and deployments. Integration of the frontend with a Kotlin and Spring Boot backend over an API described with OpenAPI, with PostgreSQL for data management. Full responsibility for the design of the marketplace.

Technologies

React, TypeScript, AWS S3, AWS Services, PostgreSQL, Gitlab, Kotlin, Spring Boot
08/2018 - 06/2020
Software Engineer and Data Analyst
Full-time, MaibornWolff GmbH

Development and deployment of services in a Kubernetes cluster and migration to the Azure Cloud, with a focus on the anonymization and pseudonymization of IoT data. Backend development with Java, Dropwizard, Vavr, Akka, and Drools. Container orchestration with Azure Kubernetes Service, managed through Helm charts and supporting Node.js tooling. Data management with Amazon S3 and Blob Storage, system monitoring with Grafana and the ELK Stack. Agile methods (Scrum, Kanban), Jira for project management, and Jenkins for continuous integration.

Technologies

Azure, Kubernetes, Helm, Docker, MicroServices, Kafka, Nats, S3, Blob Storage (Anonymization and Pseudonymization), Java, Dropwizard, Gradle, Node.js, JavaScript, React, MaterializeCSS, GitLab CI/CD
07/2016 - 05/2018
Development Engineer
Full-time, TechConnect GmbH

Validation of NDS maps for automotive suppliers and creation of the corresponding reports. Backend development with Java and Maven, deployed on WildFly; maps of several NDS versions were read from SQLite. The frontend started out with vanilla JavaScript and OpenLayers and was later migrated to Angular. Map quality was in part verified on the road during test drives. In addition, transformation of NDS maps into the OpenDRIVE format (XML) for driving simulations. Working student from 07/2016 to 07/2017.

Technologies

WildFly, Java, Spring Framework, JavaScript, Angular 2-6, Lodash, jQuery, Primefaces, Java Server Faces (JSF), OpenLayers, OpenDrive, Jenkins, Docker
10/2012 - 02/2016
Software Application Developer in the Research and Development Department
Working Student/Part-time, Onpex GmbH

ONPEX GmbH is a FinTech company focused on global payment processing. Responsible for the development of the product portfolio, in the frontend (ExtJS/JavaScript) and the backend (PHP/Java) as well as in native Android applications.

Technologies

Java, Android 2.3.7, Jersey SOAP/REST, PHP/Zend Framework, PostgreSQL, Apache Mesos, Jenkins
10/2015 - 09/2017
Hochschule Landshut
Master of Science in Informatik

Overall average grade: 2.1
Master thesis: Conversion from NDS to OpenDRIVE, grade: 1.9

09/2010 - 08/2015
Bachelor
Hochschule Landshut
Bachelor of Science in Informatik

Bachelor thesis: Automation of a service API, grade: 1.3