Mark Plaatsman - Full-Stack Software Developer, Product Data Import

Q: Where is Mark based?

Mark is based in Hamburg, Germany .

Q: What languages does Mark speak?

Mark speaks the following languages: Dutch (Native), German (Advanced), English (Advanced) .

Q: How many years of experience does Mark have?

Mark has at least 9 years of experience. During this time, Mark has worked in at least 6 different roles and for 4 different companies . The average length of individual experience is 1 year and 5 months . Note that Mark may not have shared all experience and actually has more experience.

Q: What is Mark's latest experience?

Mark's most recent position is Full-Stack Software Developer, Product Data Import at Otto (GmbH & Co KG) .

Q: What companies has Mark worked for in recent years?

In recent years, Mark has worked for Otto (GmbH & Co KG) , Deutsche Bank AG , VTG GmbH , and Beratergruppe Verkehr + Umwelt GmbH .

Q: Which industries is Mark most experienced in?

Mark is most experienced in industries like Retail , Transportation , and Information Technology . Mark also has some experience in Banking and Finance .

Q: Which business areas is Mark most experienced in?

Mark is most experienced in business areas like Information Technology , Product Development , and Quality Assurance . Mark also has some experience in Operations .

Q: Which industries has Mark worked in recently?

Mark has recently worked in industries like Retail , Transportation , and Information Technology .

Q: Which business areas has Mark worked in recently?

Mark has recently worked in business areas like Information Technology , Product Development , and Quality Assurance .

Recommended expert

Hamburg, Germany

Experience

Aug 2025 - Present

8 months

Full-Stack Software Developer, Product Data Import

Otto (GmbH & Co KG)

Manage and operate the product data import services for the Otto merchant
Enhance and maintain the backend systems
Optimize and maintain AWS infrastructure
Build a new product data import API
Design and plan stories and features
Conduct code reviews to ensure code quality and best practices
Analyze and fix bugs
Technologies: Java, Spring Boot, Kafka, AWS, Fargate, Terraform, MongoDB, Mongo Atlas, OpenAPI, GitHub, GitHub Actions, GitHub Copilot, Akhq, Debezium, JUnit, Test Containers, Hexagonal Architecture

Jun 2025 - Aug 2025

3 months

Full-Stack Senior Java/Kotlin Developer and Software Architect, Enterprise Single Sign-On

Deutsche Bank AG

Manage and extend the PingAM access management software for Deutsche Bank's single sign-on solution
Design and develop platform enhancements for single sign-on
Analyze, diagnose, and fix issues
Document technical solutions
Conduct code reviews
Onboard and migrate clients to the new single sign-on solution
Maintain Jira tickets
Technologies: Java, Kubernetes, Helm, GCP, GitHub, GitHub Actions, TypeScript, React, Red Hat, Oracle DB, OpenShift, PingAM

Jun 2024 - Jun 2025

1 year 1 month

Software Developer, Traigo Fleet Management

VTG GmbH

Develop and maintain the digital fleet management platform Traigo
Enhance and maintain backend and frontend services
Develop and implement test strategies
Optimize and maintain AWS infrastructure
Design and plan stories and features
Define requirements and business logic in Agile discoveries
Conduct code reviews to ensure code quality and best practices
Analyze and fix bugs
Technologies: Kotlin, AWS, PostgreSQL, AWS Lambda, Spring Boot, GitLab CI, Kubernetes, Helm, Docker, Flyway, Hibernate, JOOQ, DynamoDB, Aurora PostgreSQL, AWS Athena, Serverless, Terraform, Kodein, JUnit, Angular, TypeScript, SQS, SNS, Git, OpenAPI, Ktlint, Datadog, Selenium

Sep 2023 - May 2024

9 months

Software Developer, Digital Dispatch for Deutsche Bahn

Beratergruppe Verkehr + Umwelt GmbH

Develop a digital solution to replace the analog dispatch process
Develop and maintain the backend API
Create and document the software architecture
Design and implement a scalable AWS cloud infrastructure
Implement a continuous integration pipeline
Design stories and features
Conduct code reviews
Prioritize technical tasks based on project schedules and goals
Perform security assessments according to the OWASP Application Security Verification Standard
Create software and security documentation according to the EN50128 standard
Technologies: Kotlin, Quarkus, AWS, GitLab CI, Kubernetes, Docker, Flyway, Hibernate, Aurora PostgreSQL, Vert.x, Mutiny, Fargate, JUnit, React, TypeScript, Git, OpenPDF, OpenAPI, Microsoft AD Graph API, Keycloak, Ktlint

Nov 2020 - Sep 2023

2 years 11 months

Technical Lead Communication & E-Privacy Team

Otto (GmbH & Co KG)

Provide lateral leadership for the Communication & E-Privacy team
Provide technical leadership to an external development team
Define interfaces and software architecture
Write user stories and epics
Review completed stories
Define requirements in Agile discoveries
Serve as a liaison for external developers
Projects:
Set up a contact form between customers and sellers
Set up a product consultation contact form
Set up a callback service
Set up a feedback & criticism form with OpenAPI/OAuth2 interface
Set up a customer solution form
Set up a GDPR data request and download service
Set up the infrastructure in AWS with Infrastructure as Code

Jul 2017 - Sep 2023

6 years 3 months

Senior Developer, My Account & Aftersales Team

Otto (GmbH & Co KG)

Full-stack developer in the cross-functional "My Account & Aftersales" team
Security Champion, responsible for IT security within the team
Introduced clean code techniques
Managed AWS infrastructure
Mentored trainees and interns
Projects:
Migrated the IT infrastructure to the AWS cloud using Infrastructure as Code
Rebuilt the "My Orders" section with new reactive microservices that asynchronously connect to new Otto backend systems
Replaced the "My Account" monolith with new reactive microservices
Built the Otto.de API
Technologies: Java, Kotlin, AWS, AWS CDK, Spring Boot, Spring MVC, AWS Lambda, Project Reactor, TypeScript, MongoDB, Mongo Atlas, SQS/SNS, GitHub Actions, Micronaut, Jenkins, SOAP, Thymeleaf, Scrum, HAL-JSON, OpenAPI, JUnit, TestNG, Selenium

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Retail, Transportation, and Information Technology.

Retail

Transportation

Information Technology

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, Operations, and Quality Assurance.

Information Technology

Product Development

Operations

Quality Assurance

Summary

Full-stack senior Java/Kotlin developer and software architect. Strong passion for software quality and cloud computing.

Experience with large and complex software development projects in cross-functional teams.

Languages

Dutch

Native

German

Advanced

English

Advanced

Education

University of Applied Sciences Leiden

Bachelor of Science in Information Technology · Information Technology · Leiden, Netherlands

Certifications & licenses

AWS Certified Solutions Architect - Associate

Statistics

Experience

Total positions 6

Experience in Retail 7 y

Avg length 1 y 11 m

Longest experience 6 y 2 m

Expertise

Recent roles Full-Stack Software Developer, Product Data Import, Full-Stack Senior Java/Kotlin Developer and Software Architect, Enterprise Single Sign-On, Software Developer, Traigo Fleet Management

Main industries Retail, Transportation, Information Technology

Main business areas Information Technology, Product Development, Operations

Qualifications

Highest degree Bachelor

Certifications earned 1

Profile

Created

January 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Mark based?

Mark is based in Hamburg, Germany.

What languages does Mark speak?

Mark speaks the following languages: Dutch (Native), German (Advanced), English (Advanced).

How many years of experience does Mark have?

Mark has at least 9 years of experience. During this time, Mark has worked in at least 6 different roles and for 4 different companies. The average length of individual experience is 1 year and 5 months. Note that Mark may not have shared all experience and actually has more experience.

What roles would Mark be best suited for?

Based on recent experience, Mark would be well-suited for roles such as: Full-Stack Software Developer, Product Data Import, Full-Stack Senior Java/Kotlin Developer and Software Architect, Enterprise Single Sign-On, Software Developer, Traigo Fleet Management.

What is Mark's latest experience?

Mark's most recent position is Full-Stack Software Developer, Product Data Import at Otto (GmbH & Co KG).

What companies has Mark worked for in recent years?

In recent years, Mark has worked for Otto (GmbH & Co KG), Deutsche Bank AG, VTG GmbH, and Beratergruppe Verkehr + Umwelt GmbH.

Which industries is Mark most experienced in?

Mark is most experienced in industries like Retail, Transportation, and Information Technology. Mark also has some experience in Banking and Finance.

Which business areas is Mark most experienced in?

Mark is most experienced in business areas like Information Technology, Product Development, and Quality Assurance. Mark also has some experience in Operations.

Which industries has Mark worked in recently?

Mark has recently worked in industries like Retail, Transportation, and Information Technology.

Which business areas has Mark worked in recently?

Mark has recently worked in business areas like Information Technology, Product Development, and Quality Assurance.

What is Mark's education?

Mark holds a Bachelor in Information Technology from University of Applied Sciences Leiden.

Does Mark have any certificates?

Mark has 1 certificate: AWS Certified Solutions Architect - Associate.

What is the availability of Mark?

Mark is immediately available full-time for suitable projects.

What is the rate of Mark?

Mark's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.