Adam Warcholinski - Senior Software Developer, C# .NET

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Katowice, Poland

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Experience

Jun 2025 - Present

1 year 4 months

Senior Software Developer

Programming predefined tasks: mathematical calculations of voltages, currents, phases, and resistances in high-current devices
Technologies & Tools: C#, .NET 8, Dependency Injection

Feb 2025 - Jun 2025

5 months

Tech Lead / Senior Software Developer

Fortegia

Programming predefined tasks and defining new tasks as well as leading a team (3 people)
Responsible for task planning and module development
Technologies & Tools: C#, ASP.NET Core, .NET 8, Dependency Injection, REST API, JSON, CQRS + MediatR, EF Core, MySQL, RabbitMQ, GraphQL, Linux Ubuntu 24.04, Apache Server

Nov 2024 - Feb 2025

4 months

Architect / Tech Lead

Fortegia

Designing fast, efficient, and scalable e-commerce architecture and creating initial module prototypes and communication logic (RabbitMQ)
Technologies & Tools: C#, ASP.NET Core, .NET 8, Dependency Injection, REST API, JSON, CQRS + MediatR, EF Core, MySQL, RabbitMQ, Microservices, Linux Ubuntu 24.04, Apache Server

Jan 2024 - Nov 2024

11 months

Software Developer

A2ClinicalResearch

Developing a platform to coordinate clinical trials, organize research teams and projects, and export data for statistical analysis
Technologies & Tools: C#, ASP.NET Core (Razor Pages), Razor Engine, Dependency Injection, REST API, JSON, MediatR, DapperORM, MySQL, Bootstrap, JavaScript, Linux Ubuntu 20.04, Apache Server

Apr 2023 - Nov 2023

8 months

Software Developer

Medical Information Software

Adapting existing medical information systems
Developing and integrating REST API interfaces to exchange data between legacy systems and new components
Technologies & Tools: C#, Visual Studio 2022, REST API, CI/CD, Unit Tests

Jan 2023 - Apr 2023

4 months

Software Developer

Pneumosilesia

Supporting the medical field by exchanging research data
Migrated to .NET 6, configured servers (Apache, domain, SSL, firewall), and deployed a medical application
Technologies & Tools: C#, Visual Studio 2022, REST API, CI/CD, Unit Tests, Linux Administration (Ubuntu 20.04)

Oct 2022 - Jan 2023

4 months

Software Developer – Medical Speech Recognition Software

Improving communication in the medical field through speech recognition for documentation with a focus on CI/CD and test integration
Technologies & Tools: C#, Visual Studio 2022, Web API, CI/CD, Unit Tests

Jul 2022 - Dec 2022

6 months

Software Developer – Telecom & Entertain API Interfaces

Developing new interfaces and extending existing systems for communication with Ocilion and CRM Now
Technologies & Tools: C#, Visual Studio 2019, ASP.NET Core, Razor Pages, Web API, Ocilion, IPTV

Oct 2021 - May 2022

8 months

Software Developer – MES System & Chip Production

Extending an existing MES system and developing new modules for chip production
Technologies & Tools: C#, MS SQL Server, PostgreSQL, TFS, Git

Jun 2021 - Sep 2021

4 months

Software Developer – EPI Server Portal

Enhancing an existing portal and completely redesigning the user interface
Technologies & Tools: C#, EPI Server, EPI Find, Elasticsearch, MS SQL Server, Git

Apr 2021 - Jul 2021

4 months

Software Developer – Public Sector / Youth Portal

System support before go-live phase with configuration and database maintenance
Technologies & Tools: PHP 7.2, Vue.js, MySQL, MemCached, Elasticsearch, Linux Debian, Nginx, Azure (VMs & Storage)

Dec 2020 - May 2021

6 months

Software Developer – Product Catalog Tool

Support and further development of existing catalog software
Technologies & Tools: C#, .NET Framework 4.6.1, LINQ, Visual Studio 2017, EPI Find

Oct 2020 - Dec 2020

3 months

Software Developer – REST Service for Web Application

Development of an Elasticsearch interface for EPI Server Find
Technologies & Tools: C#, .NET Framework 4.6.1, LINQ, Visual Studio 2017, EPI Find, Elasticsearch (AWS)

May 2020 - Aug 2020

4 months

Wiesbaden, Germany

Software Developer – Internal Public Sector Systems

Development of internal modules for administrative software
Technologies & Tools: C#, .NET Framework 4.6.1, EF 6.0, Visual Studio 2019

Oct 2019 - Mar 2020

6 months

Kraków, Poland

Software Developer – Banking Applications

Migration from Borland Pascal to C# WPF for internal banking systems and development of internal applications
Technologies & Tools: C#, .NET Framework 4.6.1, EF 6.0, NHibernate, DB2, Visual Studio 2017, WPF, Perforce

Apr 2018 - Sep 2019

1 year 6 months

Stuttgart, Germany

Software Developer – MES Line Control

Developed modules for production line control and communication with WCF services
Accessed SQL and Oracle databases
Technologies & Tools: C#, .NET Framework 4.5, EF 6.0, SQL Server, Oracle, Visual Studio 2017, TFS, VSTS, WCF, WWF

Dec 2017 - Mar 2018

4 months

Stuttgart, Germany

Software Developer – VAN Telematics

Developed REST-based microservices for vehicle control and integration via Azure Service Bus
Technologies & Tools: C#, .NET Framework 4.5, EF 6.0, Visual Studio 2017, Azure, Service Bus, Microservices, Postman

Aug 2016 - Nov 2017

1 year 4 months

Bremen, Germany

Software Developer – OrCon Steel Production

Architected and enhanced a management system for steel production
Technologies & Tools: C#, .NET Framework 4.5, Oracle 11/12, EF 6.0, ASP.NET MVC, AngularJS, SignalR, Visual Studio 2015, TFS, OpenXML, T4

Feb 2016 - Jul 2016

6 months

Warsaw, Poland

Software Developer – Ministry of Health

Developed a drug reimbursement system with calculation logic according to laws and regulations
Technologies & Tools: C#, .NET Framework, MS SQL Server, EF 6.0, Bootstrap, ASP.NET MVC, Visual Studio 2015

May 2012 - Aug 2015

3 years 4 months

Biberach, Germany

Architect & Software Developer

CMS & Portale

Single-person project to develop a CMS for technicians and customers
Included a web portal, SharePoint integration, and a mobile Android application
Technologies & Tools: C#, SharePoint 2007/2010, .NET Framework, Android (Java, SQLite), SOAP, ASP.NET MVC, SQL Server

Aug 2009 - Dec 2017

8 years 5 months

Katowice, Poland

Partner & Developer

Markenentwicklung

Team leadership, PR and marketing, and customer contact
Web solutions for various SMEs
Technologies & Tools: Joomla, PHP, Google Apps, Adobe Photoshop/Illustrator, SQL Server, ASP.NET, .NET Web Services

May 2007 - Apr 2009

2 years

Katowice, Poland

Team Leader / Architect – CAD/CAM Software

Team leadership, architecture, and development in an international development team (PL/ES)
Technologies & Tools: C++, C#, Visual Studio 6.0/2008, .NET Framework 3.0, MVC, SCRUM

Oct 2006 - May 2007

8 months

Katowice, Poland

Software Developer – CAM Software

Development of new features
Technologies & Tools: C++, Visual Studio 6.0

Feb 2006 - Jun 2007

1 year 5 months

Katowice, Poland

Software Architect & Developer – Onboard Management System

Development of an onboard management system as a one-man project
Technologies & Tools: C#, .NET Framework, Office System, .NET Web Services, MS Access, Flash

Dec 2003 - Oct 2006

2 years 11 months

Katowice, Poland

Software Developer – Document Management

Migration to electronic document management with SharePoint
Technologies & Tools: C#, .NET Framework, SharePoint Portal Server, Office/InfoPath, BizTalk Server

Jul 2003 - Oct 2003

4 months

Katowice, Poland

Software Developer – Loyalty System

Developed a bonus program for public transport with GUI design and module creation
Technologies & Tools: C#, MS SQL Server, T-SQL

Aug 2001 - Mar 2003

1 year 8 months

Katowice, Poland

Software Developer – Property Management

Developed modules and user interfaces
Technologies & Tools: Visual Basic, Crystal Reports, MS SQL Server, T-SQL

Jul 2001 - Aug 2001

2 months

Katowice, Poland

Software Developer – Time Tracking System

Developed modules in ASP and VB
Technologies & Tools: ASP, Visual Basic, MS SQL Server, T-SQL

Apr 2001 - Jun 2001

3 months

Katowice, Poland

Software Developer – Nursing Home Management

Newly developed and expanded existing features
Technologies & Tools: Visual Basic, Crystal Reports, MS SQL Server

Nov 2000 - Mar 2001

5 months

Katowice, Poland

Software Developer – Personnel Scheduling (PEP)

Enhanced existing modules
Technologies & Tools: Visual Basic, Crystal Reports, MS SQL Server

Mar 2000 - Jun 2000

4 months

Kraków, Poland

Software Developer – Warehouse Management (Qguar)

Module development and enhancement in a team of 20 developers
Technologies & Tools: Visual Basic, Crystal Reports, Oracle

Aug 1999 - Oct 1999

3 months

Bremen, Germany

Software Developer / Web Designer – Web Projects

Web solutions for various clients
Technologies & Tools: PHP, C++, MySQL, QuarkXPress

Sep 1997 - Mar 2000

2 years 7 months

Katowice, Poland

Software Developer / Web Designer – Client Projects

Development of custom web solutions
Technologies & Tools: PHP, C++, MySQL, Java, JavaScript, Adobe Photoshop

Industry experience

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

Experienced in Information Technology, Advertising, Manufacturing, Healthcare, Energy, and Metals and Mining.

Information Technology

Advertising

Manufacturing

Healthcare

Energy

Metals and Mining

Business area experience

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

Experienced in Information Technology, Product Development, Marketing, Project Management, Research and Development, and Quality Assurance.

Information Technology

Product Development

Marketing

Project Management

Research and Development

Quality Assurance

Summary

Goal-oriented Tech Lead with extensive experience in coaching, team leadership, and team building. Strong technical background in C++, C#, .NET Framework, ASP.NET Core, SharePoint, RabbitMQ, and project management according to PRINCE2.

Active in leading international organizations (e.g., BNI, JCI).

Skills

Technologies & Tools:

C#
C++
.Net Framework & .Net Core
Asp.Net Core
Entity Framework Core
Razor Pages
Rest Api
Graphql
Rabbitmq
Mysql
Ms Sql
Dapperorm
Sharepoint 2007/2010
Joomla
Wordpress
Solidworks
Inventor
Catia
Azure
Linux (Ubuntu)
Apache Server
Git
Docker
Scrum

Methods & Architecture:

Microservices
Cqrs + Mediatr
Domain-Driven Design
Tdd
Ci/Cd
Project Management (Prince2)

Industry Knowledge:

Medical & Healthcare (Hospitals, Resource Planning, Fhir)
Cad/Cam (Solid Edge, Api Development)
E-Commerce (Shopify, Woocommerce, Oms)
Finance (Real Estate & Risk Management)
Automotive (Van Telematics)
Industry 4.0 (Mes)

Languages

Polish

Native

German

Advanced

English

Advanced

Spanish

Elementary

Italian

Elementary

Education

Oct 1995 - Jul 2000

Technical University of Gliwice

Databases and Computer Systems · Gliwice, Poland

Certifications & licenses

Robotics & AI In Medicine

Silesian Medical + Technical University

MBA – Master Of Business Administration

Coaching, Active Listening, Negotiation Techniques, Team Building (Insights Tests)

Smart Documents Design & Development

Office System And Smart Documents

Central Intermediate Certificate (ZMP)

Goethe Institute

Statistics

Experience

Total positions 33

Experience in Information Technology 16 y

Avg length 1 y

Longest experience 8 y 4 m

Global experience

Countries worked in 2 (Poland, Germany)

Primary country Poland

Expertise

Recent roles Senior Software Developer, Tech Lead / Senior Software Developer, Architect / Tech Lead

Main industries Information Technology, Advertising, Manufacturing

Main business areas Information Technology, Product Development, Marketing

Qualifications

Certifications earned 8

Profile

Member since

December 2025

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Frequently asked questions

Have questions? Find more information here.

Adam is based in Katowice, Poland and can operate in on-site, hybrid, and remote work models.

Adam speaks the following languages: Polish (Native), German (Advanced), English (Advanced), Spanish (Elementary), Italian (Elementary).

Adam has at least 27 years of experience. During this time, Adam has worked in at least 31 different roles and for 6 different companies. The average length of individual experience is 1 year and 10 months. Note that Adam may not have shared all experience and actually has more experience.

Based on recent experience, Adam would be well-suited for roles such as: Senior Software Developer, Tech Lead / Senior Software Developer, Architect / Tech Lead.

Adam's most recent position is Senior Software Developer.

In recent years, Adam has worked for Fortegia, A2ClinicalResearch, Medical Information Software, and Pneumosilesia.

Adam is most experienced in industries like Information Technology, Advertising, and Manufacturing. Adam also has some experience in Healthcare, Real Estate, and Aerospace and Defense.

Adam is most experienced in business areas like Information Technology, Product Development, and Marketing. Adam also has some experience in Project Management, Research and Development, and Human Resources.

Adam has recently worked in industries like Healthcare, Energy, and Information Technology.

Adam has recently worked in business areas like Information Technology, Product Development, and Research and Development.

Adam attended Technical University of Gliwice for Databases and Computer Systems.

Adam has 8 certificates. Among them, these include: Robotics & AI In Medicine, MBA – Master Of Business Administration, and PRINCE2 – Project Management Certificate.

The availability of Adam needs to be confirmed.

Daily rate distribution

0 1 2 3 4

<€320 €320-480 €480-640 €640-800 €960+

The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.

Average rates for similar positions

Rates are based on recent contracts and do not include FRATCH margin.

600

450

300

150

Daily rate avg. 460 €

The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.

600

450

300

150

Median rate 400 €

The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.

Calculated based on our freelancers’ daily rates as of 7 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.