Michael Fecher - Freelancer, Solution Architect

Roth, Germany

Experience

Jan 2024 - Present

2 years 1 month

Wiesbaden, Germany

Freelancer, Solution Architect

Schufa AG

Helped to design the AWS infrastructure, integrated services and backend architecture for use cases of an on-premise solution and partial migrations to AWS with fast response times
Implemented automated AWS integration test suites
Implemented mission-critical components and delivered them before the deadline in a production-ready state with operation and monitoring concepts
This 2-month subproject was about building a data-intense pipeline (5 TB) to be enriched continuously with data
Designed and implemented reusable AWS CDK constructs to be used across the company’s teams to enable faster onboarding with AWS
Coached on AWS topics, distributed software patterns, security, domain-driven design, agile collaboration and documentation to improve performance and collaboration
Technologies: AWS, GitHub Actions, ETL, monitoring, operations, TypeScript, Python, AWS CDK, CloudFormation, Java, Docker, AWS ECS, AWS Lambda, serverless, Jenkins, DevOps principles

Dec 2021 - Apr 2023

1 year 5 months

Kassel, Germany

Freelancer, Solution Architect

Twinsity GmbH

Designed and implemented a production-ready multi-account environment setup with automations and SSO
Implemented a rich CI/CD via GitHub Actions to AWS accounts
Designed and implemented the required AWS infrastructure for hosting containers on ECS and SPA website hosting using API Gateway, CloudFront and S3
Evaluated and conceptualized multi-tenancy and cross-tenant access, backup and restore mechanisms
Technologies: AWS, TypeScript, AWS CDK, serverless, CloudFormation, Docker, GitHub Actions, AWS DevTools, AWS ECS, AWS Lambda, DevOps principles

Jul 2021 - Dec 2021

6 months

Ludwigsburg, Germany

Freelancer, AWS DevOps Engineer

MHP Consulting at Porsche AG

Unified CI/CD pipelines into a single monorepo-based pipeline to gain faster feedback and reduce costs
Designed and implemented certificate-based authorization
Implemented Lambda adapters to loosely couple business logic and backend APIs
Designed and implemented infrastructure as code for new business features
Technologies: AWS, TypeScript, AWS CDK, ETL, Docker, AWS DevTools, AWS ECS, AWS Lambda, API Gateway, SNS, SQS

Nov 2020 - Apr 2021

6 months

Ludwigsburg, Germany

Freelancer, AWS DevOps Engineer

MHP Consulting at Porsche AG

Designed and implemented AWS serverless infrastructure monitoring, tracing and logging for the whole platform
Refactored the AWS CDK deployment model into separate, independently maintainable artifacts and introduced trunk-based development
Implemented automated testing mechanisms for faster feedback
Implemented serverless business use cases
Coached on clean code, AWS, Git, versioning and release management
Technologies: AWS, TypeScript, AWS CDK, serverless, Docker, AWS DevTools, AWS ECS, AWS API Gateway, AWS Lambda, SNS, SQS

Jan 2020 - Mar 2024

4 years 3 months

Cadolzburg, Germany

Freelancer, Solution Architect

AVL DiTest

Designed the AWS infrastructure and integrated services and backend architecture for a greenfield platform and OEM projects
Helped hire and build a team of 10 people for the platform which has more than 6000 active users as of February 2024
Added multiple data processing pipelines for IoT devices (up to 300 events/second) to be displayed in custom dashboards
Designed and implemented reusable AWS CDK constructs to enable faster onboarding with AWS across teams
Coached on software engineering principles, security, domain-driven design, agile collaboration and documentation to improve performance and team spirit
Technologies: AWS, TypeScript, Python, AWS CDK, CloudFormation, Java, serverless, Docker, Step Functions, OpenSearch, AWS DevTools, ETL, AWS ECS, AWS Batch, AWS Lambda, AWS IoT Suite, Jenkins, DevOps principles, AppSync/GraphQL

May 2019 - Jan 2020

9 months

Freelancer, Machine Learning Engineer

GfK

Evolved a proof of concept to a cloud product for automatically finding the correct shop shares in a market segment
Designed and developed production-ready Python software with clean code principles, modularity and performance optimization
Held workshops on Python principles, collaboration and tooling
Provided a test concept for data-driven unit and integration tests
Designed and implemented a data and ML pipeline to allow faster feedback for data scientists on the impact of changes
Adapted data science algorithms to Apache Spark and Hive
Technologies: Python, DevOps, Docker, ETL, Jenkins, Apache Airflow, Apache Spark, Hive

Feb 2019 - Apr 2019

3 months

Freelancer, AWS DevOps Engineer

GfK

Developed distributed platform microservices for market research algorithms on AWS using Kubernetes, Docker, Spring and Java
Developed a Python application for creating Kubernetes custom resource definition dependencies between market research algorithms
Coordinated and architected contracts between microservices
Technologies: Spring, Java, Python, serverless, AWS, TypeScript, CDK, Docker, DevOps, Kubernetes, Pact

Mar 2018 - Jan 2019

11 months

Nuremberg, Germany

(Coding) Software Architect

Siemens AG

Crafted and designed PoCs connecting manufacturing machines to AWS and MindSphere cloud and creating web apps demonstrating predictive maintenance aspects, presented at an internal Siemens fair
Conceptualized and implemented a multi-cloud and on-premise communication message broker based on MQTT
Designed and implemented infrastructure and DevOps for parallelizing cloud calculations using AWS CDK
Acted as product owner for a CAD/CAM research project with machine learning and AI aspects, managing a €400k budget and coordinating a team of four data scientists
Technologies: Spring, Java, Python, AWS, CDK, Docker, DevOps, ReactJS, TypeScript, REST, AMQP, InfluxDB, microservices

Jul 2015 - Feb 2018

2 years 8 months

Stuttgart, Germany

Lead Senior Software Developer

Bosch.io / Robert Bosch GmbH

Developed backend functionalities and reusable microservices for the supply chain domain using Java 8 with vert.x and RxJava, later introducing Spring 5, Spring Cloud and Spring Data
Used REST, AMQP and MQTT for communication and Oracle and MongoDB for storage
Acted as mentor and coach for colleagues
Served as technical contact for customers, defining solutions, microservices and deployment strategies
Responsible for technical quality issues, including test concepts, stabilization, scaling and contract design (e.g., GraphQL)
Developed and discussed architectural drafts with architects
Co-decided recruiting activities and built up to three teams, including international teams
Technologies: Java 8, JUnit, Mockito, Maven, Gradle, Spring, vert.x, RxJava, microservices, Python, AMQP, MQTT, Jenkins, CI/CD, Docker, ELK, Oracle RDBMS, Cloud Foundry, Apache Jena, RDF/OWL, SPARQL, Git, Bash, knowledge graph

Jul 2013 - Jun 2015

2 years

Würzburg, Germany

Software Engineer & Consultant

Flexus AG

Designed, tested and developed Java client software products for a transport management system, including optimizing path and route-finding algorithms, correcting performance issues and refactoring legacy code
Drastically improved Jenkins CI and Maven build management
Constructed and developed a constraint solving application to optimize deployment of driving jobs and calculate key figures in real time using Java 7, SOAP, REST and Spring
Coordinated interns and students in development
Managed projects for the transport management system to implement new features and integrate it with SAP PP and SAP MM processes

Apr 2012 - Jan 2013

10 months

Würzburg, Germany

Software Developer

Fraunhofer-Gesellschaft ISC

Evaluated and implemented an adaptive pipeline of image segmentation, image enhancing and edge detection for sintering process samples, achieving 30% faster and more precise results than the previous method
Ensured determinism and stability through testing
Prototyped in MATLAB and implemented product in OpenCV and Python

Nov 2010 - Sep 2011

11 months

Würzburg, Germany

Software Developer

Freelancing during studies

Developed C++ applications for mobile tracking of trucks
Developed an improved search algorithm in Java and Spring for an insurance customer

Sep 2009 - Apr 2010

8 months

Software Developer (Scholarship)

IBM

Analyzed and designed a converter software application between two applications using Java EE, Spring and Hibernate
Developed Perl automations for test environments

Skills

Backend: Typescript, Python, Nodejs, Java 8+ With Spring (Especially Spring Boot, Cloud, Reactor, Dataflow, Data), Apache Camel, Vert.x
Test: Junit, Jest, Pytest, Mockito, Cucumber, Dbunit, Assertj, Gattling, Tdd
Frontend: Reactjs (Basics)
Databases: Sql, Postgresql, Dynamodb, Redis, Elasticsearch
Documentation: Arc42, Wardley Maps, Uml
Communication: Rest/http, Mqtt, Amqp, Graphql
Devops: Github Actions, Jenkins, Docker, Git, Nexus, Sonarqube, Maven, Gradle
Os: Linux (Arch Mostly, Centos, Ubuntu)