File Synchronization Services (Since Aug 2025)
C#, ASP.NET, Razor Pages, RESTful APIs, NoSQL, LiteDB, Windows Services
Resilient data-synchronization system with intelligent bandwidth management and structured logging.
Inventory Management & POS Modules (Jan-Jul 2025)
React, NodeJS, TypeScript, C#, .NET, Kubernetes, Helm, Azure
New inventory module with EntityFramework backend and React POS frontend deployed via Kubernetes.
Archiving Services on GCP (Aug-Dec 2024)
C#, TypeScript, Angular, Kubernetes, Helm, Terraform, BigQuery
Extended archiving service frontend/backend using GCP and BigQuery for data analytics.
Keycloak IAM Integration (Apr-Jul 2024)
Keycloak, TypeScript, Java, NestJS, GraphQL, Azure, Kubernetes
Deployed Keycloak into Angular app with new GraphQL APIs using NestJS microservices.
D-Trust TSE Integration (Dec 2023-Mar 2024)
C#, VB.NET, MSSQL, Cryptography
Integrated cryptographic security element with POS systems per German security standards.
Security Infrastructure Development (Apr-Sep 2023)
Keycloak, Angular, TypeScript, Java, Python, Kubernetes, Helm, NestJS
Custom Keycloak extensions, Helm charts, enhanced NodeJS backend, Angular frontend.
Customer Management Application (Nov 2022-Apr 2023)
Angular, TypeScript, GraphQL, NodeJS, NestJS, MSSQL, Azure DevOps
Customer data management system hosted on Azure with Kubernetes orchestration.
Mobile Backend for Scanning Devices (Aug-Dec 2022)
NodeJS, TypeScript, NestJS, GraphQL, Docker, MongoDB
Backend for mobile scanning devices with seamless data processing on Azure.
Streaming Data Analysis Microservices (Jan-May 2022)
C#, Python, .NET Core, Kubernetes, Terraform, BigQuery
Microservices for streaming data management on Google Cloud Platform.
Retail Backend & Security Services (Oct-Nov 2021)
Apache Kafka, Keycloak, Kubernetes, Terraform, Kotlin, Java, C#
Enhanced authorization with Keycloak extensions and TOTP email verification.
Event Processing Microservice on AWS (Aug-Sep 2021)
TypeScript, NodeJS, Docker, Kubernetes, SQS, EventBridge
Ticketing event transformation for AWS EventBridge compatibility.
API Design for Partner Integration (Dec 2020-Jul 2021)
C#, Python, .NET Core, OData, GraphQL, Azure, OpenAPI v3
RESTful APIs for ML partner integration with Clean Architecture and SOLID principles.
Customer Management PWA (Jul-Dec 2020)
C#, .NET Core, TypeScript, Angular, 2FA, OAuth2
Mobile-first PWA for Customer Success Teams in Europe, US, and Japan.
.NET 4.x to Angular Migration (Nov 2019-Jun 2020)
C#, .NET Core, TypeScript, Angular, REST, GraphQL
Migrated legacy WCF application to modern PWA with .NET Core and Angular.
Automated Invoice Processing (May-Oct 2019)
C#, .NET Core, Docker, Azure
Automated processing, indexing, and retrieval of vendor invoice documents.
Deployment Framework (Jan-Apr 2019)
Docker, PowerShell, Python, Azure
Automatic Docker registry creation, builds, and cloud deployment framework.
Legacy Retail System Revamp (Jan 2016-Dec 2018)
C#, .NET Core, TypeScript, Angular, Azure, RESTful APIs
Principal designer/developer: PWA transformation, team building, Angular training, Azure SQL migration, API implementation.
Mobile & Document Systems (2014-2015)
NativeScript, TypeScript, C#, Lucene.NET, WebSockets
Commodity management mobile apps, monitoring systems, translation tools, document indexing with Lucene.
Geo-Tracking & Logistics Systems (2011-2013)
JavaScript, C#, Python, Azure, GIS, OpenStreetMap
Real-time tracking solutions, GIS integration for DHL Innovation Center logistics applications.
Energy Supply Industry Applications (Oct 2009-Jun 2011)
C#, .NET, ASP.NET, WinForms, VB6
Suite of internal applications for Customer Management, Accounting, Controlling, and Advertisement Management optimizing operational efficiency.
Android Multimedia Application (Jan-Aug 2009)
Java, C++, Android
Multimedia app for first-generation Android devices with photo capture, sound recording, and cloud-based storage access.
Adobe InDesign Plugin Development (Oct-Dec 2008)
C++, COM+, Adobe InDesign
COM+ based Adobe InDesign Plugin providing brand-management functionalities for enhanced application usage.
Ticketing System Development (Jan-Sep 2008)
Java, EJB, JBoss
Java-based ticket processing system for an entertainment ticketing company streamlining ticket management workflows.
FinTech Portfolio Software (2006-2007)
C++, C#, VB6 Migration
Portfolio-selection software development and VB6-to-modern-stack migration.
IT Consulting (2005-2006)
VB6, C#, Java, C++
Multi-language consulting across Retail, Energy, and Finance sectors with software development, security testing, and auditing.
University System Administration (2001-2004)
OpenBSD, Debian, Solaris, Firewalls, Shell Scripting
System administration at a major university, managing Unix servers and network security.
