11/04/2026 updated
100 % available
Senior C#/.NET Full-Stack Software Engineer | Enterprise Applications | Systems Integration | IOT
Budapest, Hungary
Only remote
Master, IT Programming, Wekerel Business School (Hungary)IoTJava (Programming Language)JavaScriptPHPASP.NET MVC FrameworkHTML5BankingBootstrap (Software)C Sharp (Programming Language)JSONMicrosoft Office SpecialistLogistics SoftwareSQL DatabasesTypeScriptOil and Gas
C# / .NET & ASP.NET Core Development
Over 20 years of experience in developing enterprise software, ERP applications and business-critical APIs using C#, .NET, ASP.NET Core, Entity Framework, ADO.NET and REST APIs. Extensive work on ERP modules covering orders, purchasing, finance, HR and workflow.
Database Engineering (SQL Server, PostgreSQL, Oracle, MySQL)
Deep expertise in relational database design, stored procedures, SQL performance optimization and data integration using SQL Server, PostgreSQL, Oracle and MySQL. Experience with XML/XQuery flows and SAP HANA data transfers.
Industrial IoT & Systems Integration (MQTT, OPC UA, BACnet, SAP)
Proven track record in building industrial integration platforms using MQTT, OPC UA and BACnet protocols. Experience integrating Beckhoff TwinCAT PLCs, SAP R/3, SAP HANA and MES systems, as well as LoRaWAN sensor processing and energy monitoring equipment.
Frontend Development (Angular, React, TypeScript, Blazor)
Solid experience building enterprise frontend applications using Angular, React, TypeScript, JavaScript, Blazor and Razor. Delivered document editing, calendars, business diagrams and reporting UIs.
Cloud & DevOps (Azure, AWS, Docker, Kubernetes, Linux)
Hands-on experience managing AWS and Azure cloud environments, deployments and connectivity. Worked with Docker, Kubernetes, Linux/Raspberry Pi and AWS services including DynamoDB, API Gateway and Cognito.
Microservices & API Architecture
Design and implementation of .NET Core microservices for machine telemetry, data buffering and enterprise integrations, connecting SQL Server, PostgreSQL, Oracle, SAP, MES and Azure services via REST and MQTT/OPC UA.
SAP Integration & ERP Systems
Experience with SAP R/3, SAP HANA and IDoc XML-based data transfers. Certified in SAP ABAP Programming and SAP Overview, with practical delivery of HR, logistics and supply-chain integrations.
Power BI & Reporting
Development of TypeScript-based reporting solutions and Power BI integrations for cloud environments, supporting business intelligence and operational monitoring.
PHP, Java/JSP & CakePHP
Development and support of CMS websites and warehouse workflows using PHP, Java/JSP, CakePHP and MySQL, including handheld-device support for logistics operations.
Python / Django & AWS IoT
Building AWS IoT data capture and dashboard solutions using Python/Django, DynamoDB, API Gateway and Cognito for real-time monitoring applications.
Over 20 years of experience in developing enterprise software, ERP applications and business-critical APIs using C#, .NET, ASP.NET Core, Entity Framework, ADO.NET and REST APIs. Extensive work on ERP modules covering orders, purchasing, finance, HR and workflow.
Database Engineering (SQL Server, PostgreSQL, Oracle, MySQL)
Deep expertise in relational database design, stored procedures, SQL performance optimization and data integration using SQL Server, PostgreSQL, Oracle and MySQL. Experience with XML/XQuery flows and SAP HANA data transfers.
Industrial IoT & Systems Integration (MQTT, OPC UA, BACnet, SAP)
Proven track record in building industrial integration platforms using MQTT, OPC UA and BACnet protocols. Experience integrating Beckhoff TwinCAT PLCs, SAP R/3, SAP HANA and MES systems, as well as LoRaWAN sensor processing and energy monitoring equipment.
Frontend Development (Angular, React, TypeScript, Blazor)
Solid experience building enterprise frontend applications using Angular, React, TypeScript, JavaScript, Blazor and Razor. Delivered document editing, calendars, business diagrams and reporting UIs.
Cloud & DevOps (Azure, AWS, Docker, Kubernetes, Linux)
Hands-on experience managing AWS and Azure cloud environments, deployments and connectivity. Worked with Docker, Kubernetes, Linux/Raspberry Pi and AWS services including DynamoDB, API Gateway and Cognito.
Microservices & API Architecture
Design and implementation of .NET Core microservices for machine telemetry, data buffering and enterprise integrations, connecting SQL Server, PostgreSQL, Oracle, SAP, MES and Azure services via REST and MQTT/OPC UA.
SAP Integration & ERP Systems
Experience with SAP R/3, SAP HANA and IDoc XML-based data transfers. Certified in SAP ABAP Programming and SAP Overview, with practical delivery of HR, logistics and supply-chain integrations.
Power BI & Reporting
Development of TypeScript-based reporting solutions and Power BI integrations for cloud environments, supporting business intelligence and operational monitoring.
PHP, Java/JSP & CakePHP
Development and support of CMS websites and warehouse workflows using PHP, Java/JSP, CakePHP and MySQL, including handheld-device support for logistics operations.
Python / Django & AWS IoT
Building AWS IoT data capture and dashboard solutions using Python/Django, DynamoDB, API Gateway and Cognito for real-time monitoring applications.
Experience
Professional experience10+ years
Freelancer since2020
Languages
EnglishGood
Project history
Develop and maintain ERP modules for orders, purchasing, finance, HR and workflow. Implement C#/ASP.NET Core features, database procedures and integrations; resolve production issues and optimize SQL performance. Technologies: C#, ASP.NET Core, PostgreSQL, EF, ADO.NET, DevExpress.
Built local LoRaWAN sensor processing, MQTT telemetry and BACnet-based temperature optimization. Integrated Beckhoff TwinCAT PLCs and energy monitoring equipment; supported Go/Vue/C# services deployed on Linux/Kubernetes.
Developed and supported customer CMS websites using PHP, Java/JSP, MySQL, JavaScript, HTML and CSS.