Michael Fecher
Freelancer, Solution Architect
Experience
Jan 2024 - Present
1 year 7 monthsWiesbaden, Germany
Freelancer, Solution Architect
Schufa AG
- Part-time since 12/2024.
- I helped to design the AWS infrastructure, successfully integrated services & 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 dealing with building a data-intense pipeline (5 TB) to be enriched continuously with data.
- Designed + implemented reusable AWS CDK constructs to be used across the company's teams to enable a faster onboarding with AWS.
- Coached on AWS topics, Distributed Software Patterns, Security, DDD, Agile collaboration and documentation to improve performance and collaboration.
- Technologies: AWS,GitHub Actions, ETL, Monitoring, Operations, TypeScript, Python, AWS CDK, CloudFormation, Java (20% of the time), Docker, AWS ECS, AWS Lambda, Serverless, Jenkins, DevOps principles.
Dec 2021 - Apr 2023
1 year 5 monthsKassel, Germany
Freelancer, Solution Architect
Twinsity GmbH
- Designed + implemented a production-ready multi-account environment setup with automations and SSO.
- Implementation of a rich CI/CD via GitHub Actions to the AWS accounts.
- Designed + implemented the required AWS infrastructure for hosting the containers (ECS), SPA website hosting (API Gateway, CloudFront + S3).
- Evaluations + concepts about multi-tenancy & cross-tenant access, Backup + 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 monthsLudwigsburg, Germany
Freelancer, AWS DevOps Engineer
MHP Consulting at Porsche AG
- Part of a team for a centralized platform for production and logistics.
- Unified CI/CD Pipelines to a single monorepo based Pipeline to gain faster feedback and reduce costs (duplications).
- Designed and implemented certificate-based authorization.
- Implemented Lambda adapters to loosely couple business logic and the backend APIs.
- Design + Implementation of 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 monthsLudwigsburg, Germany
Freelancer, AWS DevOps Engineer
MHP Consulting at Porsche AG
- Part of a team for a centralized platform for production and logistics.
- Designed + implemented AWS serverless infrastructure Monitoring, Tracing and Logging for the whole platform.
- Refactored the AWS CDK deployment model to be separated and independent maintainable artifacts + introduced trunk-based development.
- Implemented automated testing mechanism for faster feedback.
- Implemented serverless business use-cases.
- Coachings on Clean Code, AWS, Git, Versioning, Release Management.
- Technologies: AWS, TypeScript, AWS CDK, Serverless, Docker, AWS DevTools, AWS ECS, AWS API Gateway, Lambda, SNS, SQS.
Jan 2020 - Mar 2024
4 years 3 monthsCadolzburg, Germany
Freelancer, Solution Architect
AVL DiTest
- My main topics are the design of the AWS infrastructure, integrating services & backend architecture for use-cases for a greenfield platform and OEM projects.
- The platform was started in 2020 with just me and two others and I successfully helped my client to hire and build up a team of now 10 people. The platform has more than 6000 active users (02/2024).
- Added multiple data processing pipelines for IoT devices (up to 300 events/second) in order to be displayed in custom dashboards.
- Designed + implemented reusable AWS CDK constructs to be used across the company's teams to enable a faster onboarding with AWS.
- Coached on Software Engineering Principles, Security, DDD, Agile collaboration and documentation to improve performance and team spirit.
- Technologies: AWS, TypeScript, Python, AWS CDK, CloudFormation, Java (2% of the time), 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 monthsNuremberg, Germany
Freelancer, Machine Learning Engineer
GfK
- The project was about evolving a PoC to a cloud product, for automatically finding the correct shop shares in a market segment.
- Designed and developed production-ready Python software from the PoC with clean-code principles and better modularity. This activity also included performance optimization techniques.
- I also held workshops to teach the principles of Python, collaboration and tooling.
- Provided a test concept for data-driven unit- and integration tests.
- Designed and implemented a data and ML related pipeline. The pipeline shall allow faster feedback for data scientists if their changes on data/code had a bad/good impact on the outcome.
- Adaption of Data Science algorithms to Apache Spark + Hive.
- Technologies: Python, DevOps, Docker, ETL, Jenkins, Apache Airflow, Apache Spark, Hive.
Feb 2019 - Apr 2019
3 monthsNuremberg, Germany
Freelancer, AWS DevOps Engineer
GfK
- I was part of a project, which was about developing distributed platform microservices for market research algorithms in the cloud and providing them to internal users.
- Developed distributed platform microservices for algorithms on AWS, based on Kubernetes/Docker and Spring + Java.
- Developed a Python application for creating Kubernetes Custom Resource Definition dependencies between market research algorithms.
- Coordination / Architecting contracts between the microservices.
- Technologies: Spring, Java, Python, Serverless, AWS, TypeScript, CDK, Docker, DevOps, Kubernetes, Pact.
Mar 2018 - Jan 2019
11 monthsNuremberg, Germany
(Coding) Software Architect
Siemens AG
- I was part of an applied research department with a focus on the manufacturing domain.
- Crafted and designed several individual PoCs about connecting manufacturing machines to the AWS and MindSphere cloud and creating web apps with the value of demonstrating predictive maintenance aspects.
- Those PoCs I presented at an internal Siemens fair.
- Concepted and implemented a multi-cloud and on-premise communication message broker based on MQTT.
- Designed and implemented the infrastructure (incl. DevOps) for an optimization problem to parallelize the calculation in the cloud with AWS CDK.
- Product Owner for a CAD/CAM-related research project with Machine Learning/Artificial Intelligence aspects. The budget for the project was 400k Euros. I coordinated a team of 4 Data Scientists to achieve the goal.
- Technologies: Spring, Java, Python, AWS, CDK, Docker, DevOps, ReactJS, Typescript, REST, AMQP, InfluxDB, Microservices.
Jul 2015 - Feb 2018
2 years 8 monthsStuttgart, Germany
Lead Senior Software Developer
Bosch.io / Robert Bosch GmbH
- Worked on a Connected Industry Platform, starting in a PoC phase until it was in a product-ready state with CI on a cloud platform (Cloud Foundry). The platform nowadays is used with the Bosch Nexeed products.
- Primary developed the backend functionalities & reusable microservices for the Supply-Chain-Domain with several levels of complexity.
- I developed in Java 8 with vert.x and RxJava mostly and later on I could convince the team of Spring 5.
- I used Spring 5 in terms of REST communication as well as AMQP/MQTT.
- Spring Cloud and Data were used in terms of configuration and easier cloud setup. For storage most of the time, I used Oracle and MongoDB.
- Being a positive mentor and coach for colleagues.
- The technical person for customer contact (together with Product Owner), to define solutions and possible microservices and deployment strategies.
- Responsible for technical quality issues, like test concepts, stabilizing, scaling out, contract design (e.g. GraphQL).
- Developed and discussed architectural drafts with the architects.
- co-decider regarding recruiting activities and building up to three teams, including international teams.
- Technologies: Java 8, JUnit, Mockito, Maven, Gradle, Spring, vert.x, reactive extensions/RxJava, Microservices, Python, AMQP, MQTT, Jenkins, CI/CD, Docker, ELK, Oracle RDBMS, Cloud Foundry, Apache Jena, RDF/OWL, SPARQL, Git, Bash, Knowledge Graph.
- Methodology: Scrum-ish.
Jul 2013 - Jun 2015
2 yearsWürzburg, Germany
Software Engineer & Consultant
Flexus AG
- Designed, tested, and developed products for Java client software of the transport management system. For example, developing an optimized path and route-finding algorithm, correcting performance issues, and measurements for refactoring legacy code.
- drastically improved the Jenkins-CI & Maven Build Management.
- Constructed & developed a constraint solving problem application, which optimizes the general deployment of driving jobs (Java 7, SOAP, REST, Spring) and calculated key figures in real-time.
- Responsible for coordinating interns and students in the development field.
- Responsible for project management regarding the transport management system in order to implement new features and integrate it in SAP PP and SAP MM processes.
Apr 2012 - Jan 2013
10 monthsWürzburg, Germany
Software Developer
Fraunhofer-Gesellschaft ISC
- Successfully evaluated and implemented an adaptive pipeline of image segmentation, image enhancing, and edge detection of samples within a sintering process. The implemented method is 30% faster and more precise than the previous method. It also is deterministic and stable tested. Prototyped in MatLab, product implementation in OpenCV & Python.
Nov 2010 - Sep 2011
11 monthsWürzburg, Germany
Software Developer
Freelancing during studies
- Developed C++ applications in the area of mobile tracking of trucks.
- Developed an improved search algorithm (Java, Spring) for an insurance customer.
Sep 2009 - Apr 2010
8 monthsMainz, Germany
Software Developer (Scholarship)
IBM
- Analyzed & designed a converter software application between two applications in Java EE, Spring, and Hibernate.
- Perl Automations for test environments.
Languages
German
NativeEnglish
Advanced Education
Mar 2011 - Mar 2013
University of Applied Sciences Würzburg
M.Sc. · Computer Science · Würzburg, Germany
Jul 2007 - Mar 2011
University of Applied Sciences Würzburg
B.Eng. · Computer Science · Würzburg, Germany
Certifications & licenses
Machine Learning with Python from A-Z
Udemy
ReactJS - JavaScript Framework
Udemy
Spark and Python for Big Data with PySpark
Udemy
TypeScript
Udemy
Testing Microservices
Software Quality Lab
arc42 certification
Stefan Zörner
Semantic Web & OWL (Web Ontology Language)
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