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I am a backend-focused software engineer with extensive experience in distributed systems, microservices, cloud technologies, Kubernetes, and IT security. I value precise documentation to ensure clear, traceable results and strive for transparent communication and well-structured processes. I enjoy visualizing complex concepts with sketches and diagrams, translating ideas into practical solutions, and guiding teams toward alignment and quality. I believe in a collaborative, evidence-based approach to software engineering.…I am a backend-focused software engineer with extensive experience in distributed systems, microservices, cloud technologies, Kubernetes, and IT security. I value precise documentation to ensure clear, traceable results and strive for transparent communication and well-structured processes. I enjoy visualizing complex concepts with sketches and diagrams, translating ideas into practical solutions, and guiding teams toward alignment and quality. I believe in a collaborative, evidence-based approach to software engineering.

Dieter K.

Back-End Developer, Full Stack Developer, Web Developer, +3

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I am a backend-focused software engineer with extensive experience in distributed systems, microservices, cloud technologies, Kubernetes, and IT security. I value precise documentation to ensure clear, traceable results and strive for transparent communication and well-structured processes. I enjoy visualizing complex concepts with sketches and diagrams, translating ideas into practical solutions, and guiding teams toward alignment and quality. I believe in a collaborative, evidence-based approach to software engineering.…I am a backend-focused software engineer with extensive experience in distributed systems, microservices, cloud technologies, Kubernetes, and IT security. I value precise documentation to ensure clear, traceable results and strive for transparent communication and well-structured processes. I enjoy visualizing complex concepts with sketches and diagrams, translating ideas into practical solutions, and guiding teams toward alignment and quality. I believe in a collaborative, evidence-based approach to software engineering.

Available to hire

I am a backend-focused software engineer with extensive experience in distributed systems, microservices, cloud technologies, Kubernetes, and IT security. I value precise documentation to ensure clear, traceable results and strive for transparent communication and well-structured processes.

I enjoy visualizing complex concepts with sketches and diagrams, translating ideas into practical solutions, and guiding teams toward alignment and quality. I believe in a collaborative, evidence-based approach to software engineering.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

German

Fluent

English

Fluent

Russian

Fluent

Work Experience

Backend Developer at Tagitech Oy

April 1, 2024 - Present

Backend development includes microservices for the mobile app. Technologies: Kotlin, Compose, Spring Boot, Spring Security, Validation, Jackson, Kubernetes, PostgreSQL, REST API, GitLab, Gradle, AWS, Swagger.

Backend Developer at Deutsche Bahn AG

September 1, 2022 - March 1, 2024

Digitization of braking forms; central message broker for dispatcher, train driver, and conductor; handling intermittent internet; migration to Java 17; Kubernetes, Helm, Azure Authentication; migration from AMQP to Kafka; unit tests, Swagger/OpenAPI, REST API; Prometheus/Grafana monitoring; agile Scrum; IT security integration; staging and data synchronization; Jira/Confluence.

Backend Developer at Public Sector - Lennestadt

January 1, 2021 - August 1, 2022

Mobile carpooling app: driver and passenger roles, ride management, ride search, PayPal integration; MapBox display via REST; public transport data via REST; Hetzner Linux infra; Prometheus/Grafana; Agile/Scrum; JetBrains Space for requirements, issue tracking, and Swagger.

Consultant - Reporting System Migration at CONSUL

June 1, 2022 - August 1, 2022

Migration of intrastat reports from Excel to XML; requirements for converter; SAP integration considerations; effort estimation for project.

Software Developer at SOF R – IT-Serviceprovider

July 1, 2020 - December 1, 2021

Sales Software as a Service: acquisition software; frontend redesign to Vue.js; REST API backend; SPA on Debian with NGINX; Kanban via YouTrack; requirements gathering; UX/UI in Adobe XD.

Data Engineer at Plastics Processing

July 1, 2021 - November 1, 2021

Data Transfer from Access97 to PostgreSQL; design of new DB model; Kotlin converter using Exposed; data normalization; datasets for viewing/searching/correcting.

Consultant at Plastics Processing

August 1, 2021 - September 1, 2021

Business data processes for the introduction of new ERP software; requirements assessment.

Software Developer at WEMA GmbH

September 1, 2020 - December 1, 2020

Product Configurator with Shop Integration; frontend SPA with Vue.js; backend Kotlin; Docker containerization; catalog digitization; Kanban; UX design.

Mobile Applications Developer at Knott GmbH

March 1, 2019 - July 1, 2020

Hybrid mobile app (Knott Service App) for Android & iOS; SPA using Quasar; independent automated build pipeline; deployment pipelines with GitLab CI; Kanban via GitLab.

Mobile Applications Developer at Reich GmbH

February 1, 2019 - January 1, 2020

Mobile service app with features for customer retention; integration of catalogs and partner data; Bluetooth/tire pressure sensor controls.

Project Work / NFC Card System at FernUniversität in Hagen

January 1, 2017 - December 1, 2018

NFC Customer Card System: web portal, authentication/authorization with NFC cards, CLI interface to web portal, NFC card writing via web interface.

Software Developer at FernUniversität in Hagen – Mein Laden 55 plus

September 1, 2014 - March 1, 2020

Mein Laden 55 plus and Mein Dorf 55 plus projects; mobile app, Dart/Flutter; Kafka as middleware; Kotlin/Java for backend; web/mobile interface; data integration.

Software Developer at Public Sector - Lennestadt

January 1, 2021 - August 1, 2022

Mobile Carpooling App: development of a mobile application for carpooling; role model for drivers and passengers; ride management and rider search; payment processing via PayPal; MapBox integration via REST; public transportation data via REST; Hetzner infrastructure (Ubuntu Linux); Prometheus monitoring; Grafana dashboards. Agile Scrum with sprint boards in JetBrains Space; requirements management, issue tracking, and documentation with Swagger.

Software Engineer / Migration Specialist at Consul – International Company

July 1, 2022 - August 1, 2022

Reporting System Migration to Intrastat XML Format; automated reports for intrastat; conversion from Excel to XML prepared for implementation; identified requirements for the converter; effort estimation for the project including SAP integration.

Software Engineer at IT-Service Provider (Sales SaaS)

July 1, 2020 - December 1, 2021

Development of a Sales Software as a Service; redesign of the old PHP frontend to VueJS; backend development in Kotlin; REST API integration; SPA hosted on Debian Linux with NGINX; Kanban via YouTrack; UX design in Adobe XD; requirements gathering.

Data Transfer / Data Engineer at Plastics Processing

September 1, 2021 - November 1, 2021

Data transfer from an Access97 DB to PostgreSQL; design of a new database model; Kotlin with JetBrains Exposed; data normalization; provision of data sets for viewing, searching, and correcting.

Product Configurator Developer at WEMA GmbH

July 1, 2020 - September 1, 2020

Product configurator with shop integration; SPA using Vue.js; backend in Kotlin; containerization with Docker; digitization of product catalogs; shop theme customization; Agile Kanban via YouTrack; UX design.

Hybrid Mobile App Developer at Knott GmbH

March 1, 2019 - July 1, 2020

Hybrid Knott Service App; SPA using Quasar (Vue.js); Cordova for Android/iOS; automated build pipeline; GitLab CI; Kanban; front-end and back-end development.

Mobile Application Developer at Reich GmbH

February 1, 2019 - Present

Mobile application easydriver Android & iOS; features for customer retention; catalogs and databases of international service locations and partners; integration of caravan maneuvering systems and tire pressure sensors; technology guidance.

Project Work at FernUniversität in Hagen

January 1, 2017 - January 1, 2018

NFC Customer Card System: development of a web portal; authentication/authorization with NFC cards; CLI interface to the web portal; NFC card writing via web interface using a card reader.

Software Developer at FernUniversität in Hagen

September 1, 2014 - March 1, 2020

Mein Laden 55 plus: development of a software to assist seniors with mobility-limited shopping; Flutter mobile app and related backend; project also included Mein Dorf 55 plus; technologies included Java, PostGIS, Android, Flutter, Dart, Elixir, Golang, Kafka, GitLab, Git, Gradle; project details available on the university site.