About

Work Experience

• Lead Developer / Architect, 

  Dec, 2022 - Jun, 20252 years 7 months

  Design and develop a CI/CD-driven platform and framework for Hardware-in-the-Loop testing. Automate software testing and flashing for the autonomous driving control unit. Collaborate, mentor or coach multiple international teams in the internal developer community.

  • Enhanced overall project efficiency by developing and enabling new automated test cases and critical test features

  • Maintained consistently low testing times, while ensuring high reliability and stability

  • Mentored and coached team members in adding new test features and enhanced their development skills

  • Led individual topics like supporting different platforms, migrations or adding new capabilities

  • Influenced best practices across the department, modernized development workflows and build up a development community

• Co-Founder, 

  Dec, 2020 - Present

  Create a team of cross-functional specialists and team players developing modern applications. Promote on-premise, cloud and hybrid architectures. Increase quality, reduce project time and decrease expenditure by applying principles and experience.

  • Successfully bootstrap and run projects and teams

  • Created long-term partnerships

  • Speed up developer careers and increase team size

• Lead Developer / Architect / AWS Developer, 

  Sep, 2020 - Present

  Take a fleet management with several architectural and security issues to launch. Setup the technical strategy, milestones, architecture, team and the agile process. Leading the team with a hands-on mentality.

  • Setup the CI/CD infrastructure, toolchains, serverless AWS architecture, evolutionary prototype

  • Assist in staffing, technical interviews and team building

  • Give scope, context, objectives and directions to the team members

  • Train on Best Practices, Design Patterns, Principles, Test-Driven-Development, Tools

  • Help the team to refine their own agile process, work collaborative and tightly coupled together

• Senior Developer, 

  Aug, 2022 - Dec, 20225 months

  Mitigating the risks after an security assessment

• Senior AWS Developer, 

  Feb, 2022 - Jul, 20226 months

  Maintaining the ingress proxies serving billions of requests a month for the platform

  • Developing serverless REST APIs for downstream teams to integrate their applications by self service

  • Enabling SysOps of our team to develop by infrastructure-is-code principle with the AWS CDK

  • Mitigating the risk of legacy code in our new projects by advocating common best practices and principles

  • Evangelize an agile and pragmatic approach to first ship the minimal viable feature and iteratively improve

• Lead Developer / Fullstack Developer, 

  Jul, 2021 - Sep, 20213 months

  Developing a shop to buy cars on the marketplace. Launched after 2.5 months of development.

  • Leading the financing team hands-on and helping the team members to ship quickly in short increments

  • Reporting current bottlenecks, discussing on current problems and providing solutions

  • Train the backend developers to integrate and work with the GraphQL services

  • Reduce common pitfalls in the use of a reactive component-based UI framework

  • Developing either on the frontend or backend while integrating the services into AWS as DevOp

• Fullstack Developer / AWS Developer, 

  Mar, 2021 - Sep, 20217 months

  Develop an app for hoteliers to provide additional content for their contracted accommodations. Define and align on integration, architecture and technical stories.

  • Align on collaboration with technical stakeholders

  • Setup a CI/CD Pipeline, serverless AWS architecture, the backend and frontend prototypes

  • Train and onboard team members on business requirements and technical solutions

  • Collaborate with UX/UI-Designer, Developers and Business Analysts

• System Engineer, 

  Jun, 2020 - Mar, 202110 months

  Develop a solution for the production information system aiding the manufacturing process. Introduce CI/CD, system integration and iterative development.

  • Train team members to use GitLab CI/CD, Docker, Spring Boot, Vaadin, OpenAPI

  • Develop a minimal prototype with Spring Boot and Vaadin

  • Configure and train to use Migrations, Hibernate and Spring Data

  • Consult in an on-premise infrastructure and introduce a common application architecture

• Backend Developer / AWS Developer, 

  Oct, 2020 - Dec, 20203 months

  Develop a stream based product information processor and emit change events to subsequents listeners.

  • Finished the starting prototypes with AWS SNS/SQS/Lambda and AWS Glue/Apache Spark/Sagemaker

  • Developed an event-driven stream processing pipeline with Quarkus and Vert.x

• Solution Architect, 

  Aug, 2020 - Nov, 20204 months

  Develop a solution for a traceable purchasing process. Integrate business intelligence services for the warehouse distribution.

  • Analyse the requirements by the stakeholders (purchasers, suppliers, data analysts, developers, business units)

  • Provide an iterative solution integrating existing workflows

  • Propose the strategic target architecture, the data flow and the collaboration

  • Consult on the features of containerization, CI/CD Pipeline, AWS architecture

• Fullstack Developer / AWS Developer, 

  May, 2020 - Jul, 20211 year 3 months

  Developed a series of Covid-19 self contained services. Defined and setup the serverless architectures.

  • Deploy middlewares serving millions of requests a day running on AWS Lambda and EKS

  • Trained the team on modern approaches of serverless architecture and reactive web components

  • Evolutionary prototype with short development time to production deployment

• Lead AWS Developer, 

  Mar, 2020 - Apr, 20202 months

  Analyse potential optimization and decide. Optimize the AWS operational costs. Improve the provisioned resources, instance pooling, scaling rules and file systems.

  • Estimate a reduction of operational costs by 60% and finally reduce costs by 75%

  • Reduce provisioned redundancy to match SLA and risk management requirements

  • Configure planned down-time in off times for test environments, reduce the amount of test samples significant

  • Migrate classic EC2 with AWS EKS, ECS, Batch, StepFunctions to save more with pay-on-demand

  • Inform about progress and further possible solutions for the business and other teams in the company

• Lead Backend Developer / AWS Developer, 

  Oct, 2019 - Feb, 20205 months

  Develop a Federated GraphQL API providing hotel content used on Frontend and Backend services

  • Train team members to setup GitLab CI, AWS architecture and to work with microservices and middlewares

  • Integrate data flows of legacy systems into the Federated GraphQL microservices

  • Propose a message driven, decoupled and serverless architecture and collaboratively develop

• Lead Developer / Solution Architect, 

  Oct, 2019 - Jan, 20204 months

  Develop a platform prototype for bookable appointments. Define and setup the architecture. Train the team in agile development.

  • Propose a serverless architecture and reactive component based clients

  • Define an agile development process based on kanban

  • Train the team to work with component based frameworks

• AWS Developer, 

  Nov, 2018 - Jul, 20199 months

  Migrate existing on-premise applications, microservices and data integration processes to AWS cloud.

  • Migrate CI pipelines from Bitbucket, Jenkins, AWS CodeCommit, CodeBuild and CodePipeline to GitLab CI

  • Decide with the team on the tools used and choose a lift-and-shift approach to reduce expenditures and project time

  • Refactor applications/services to support hybrid deployments, profile/environment configuration, containerization

  • Consolidate and migrate millions of images to another CDN with no downtime

  • Develop a scalable architecture and apply the AWS Well-Architected Framework

• Fullstack Developer, 

  Nov, 2017 - Apr, 20186 months

  Take over a legacy cluster of content processing applications to develop and maintain. Finish the migration of a microservice cluster for producing pdf travel documents and offerings to launch.

  • Add dependency manager, unit tests, coding standards and bumped the version of every software artifact

  • Propose several software design decisions to reduce development risks and improved the development process

  • Train the use of test framework, containerization, layered architectures, data mapping frameworks and dependency injection

• Fullstack Developer, 

  Jan, 2017 - Oct, 201710 months

  Develop several features for project of well known fashion brands. Develop a content editor module in the digital asset management, a recurring order service, an invoice print service. Integrating product information management systems, payment providers and order management systems.

  • Setup a containerized development environment improving the local provisioning

  • Develop backends and frontends by using scaffolding techniques in half of the planned time

  • Minimize errors and increase maintainability by applying SOLID principles and test driven development

• Backend Developer, 

  Oct, 2016 - Mar, 20176 months

  Develop the administrative context in the domain of structure and agency based access control. Implement the backend micro services and REST API with JSON+HAL.

  • Apply a hexagonal architecture with CQRS and Event Sourcing

  • Maintain a high coverage of unit tests, above 90%

  • Work with the frontend developers on a shared interface as collaborative contract

• Lead Developer / Backend Developer / Frontend Developer, 

  May, 2015 - Dec, 20161 year 8 months

  Develop and maintain the custom E-Commerce framework. Develop instances, features, integrations and modules in projects of well known fashion brands. Administer and maintain the production environment.

  • Setup an OLAP cube for faster and customized reporting, order analytics and key performance indicators

  • Train the team to work with Docker, object oriented patterns, SOLID principles and unit tests

  • Identify performance bottlenecks and architectural issues for an iterative and evolutionary improvement

  • Take over the technical responsibility for projects and team members of a quitting team lead

• Embedded Developer / Frontend Developer / Project Manager, 

  Mar, 2012 - Aug, 20142 years 6 months

  Develop and maintain the process and plant control application in a cluster of fresnel collectors producing mega watts of solar power.

  • Administer the server and client infrastructure and apply data security principles and best practices

  • Train the team members to use version control systems and to apply more design principles

  • Develop a prototype for the migration from SEW CodeSys to Beckhoff TwinCAT and modularize by PackML/ISA-S88 standards

  • Develop collaboratively a light sensor with a heat shield protecting from overheating in 200 times concentrated sun light

  • Develop a responsive web application facing the HMI and Scada systems for production process visualization

Skills

Certificates

Awards