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Jozef F.

Senior Software Engineer

United States of America

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About Me

Highly-skilled Software Engineer with 17+ years of experience using C#/.NET as main technology stack. I put emphasis on an innovative use of technology and performant highly-researched software solutions. Demonstrated hands-on expertise in managing solution architecture and building full lifecycle IT solutions in a diverse set of industry branches. Solid experience collaborating with cross-functional teams, analyzing and researching information for accurate planning and strategy that brings the most viable outcomes.

.NET 17 years C# 17 years .NET Core 17 years ASP.NET 5 years ASP.NET Core 5 years LINQ 10 years Multi-threading programming 15 years Entity Framework 15 years Async 5 years Agile software development 8 years Test-driven development (TDD) 8 years jQuery Stripe Web API 8 years Directory Service 10 years Rest API 8 years ADO.NET 5 years Model View Viewmodel (MVVM) 5 years MVC 10 years Active Directory 10 years AJAX ASP.Classic 5 years Cloud Computing 3 years Concurrent Programming 5 years Axure DevOps Scrum 5 years Performance Optimization 5 years SQLite 8 years SQL 15 years MSSQL 20 years

Work history

UpStack

Senior Software Engineer

2020 - Present (5 years)

Remote

Create and develop innovative software solutions for different clients across a broad range of industries.
Participate in scrums consisting of cross-functional teams, both software and hardware.
Ensure that features are being delivered efficiently and on-time.

.NET C#.NET Core ASP.NET Core LINQ Multi-threading programming Entity Framework Async Agile software development Test-driven development (TDD)Rest API ADO.NET ASP.Classic SQLite SQL

AddSoft

Owner

2019 - 2020 (1 year)

United States

Developed custom solutions for multiple clients mainly using C# / Azure, including a software and hardware solution for monitoring IPTV streams.
Created a solution for storing and searching words or words roots, as well as a component for data analysis and aggregation in real-time.
Acted as Project Manager in DevOps, pursuing greater speed and agility in the software development lifecycle.

.NET C#.NET Core ASP.NET Core ASP.NET Entity Framework Async Test-driven development (TDD)Directory Service Web API Model View Viewmodel (MVVM)MVC AJAX Concurrent Programming Performance Optimization MSSQL SQL SQLite

CRIF

Senior C# Developer / Contractor

2018 - 2019 (1 year)

Slovakia

Performed back-end development on the credit registry for a global company specializing in credit bureau and business information, outsourcing and processing services, and credit solutions.
Acted as Project Manager and Team Lead, coordinating internal resources and ensuring the project is delivered on time.
Monitored the International team, following a detailed project plan to monitor and track progress.

C#.NET .NET Core ASP.NET Multi-threading programming Entity Framework Async Agile software development jQuery Stripe MVC Cloud Computing DevOps Scrum SQL

SolarWinds Czech

Senior C# Developer

2012 - 2018 (6 years)

Czech Republic

Worked on the development and delivery of multiple projects for a leading provider of powerful and affordable IT infrastructure management software.
Developed the whole back-end side in C# for a project involving Monitoring network traffic for IP TV providers and other companies that use multicast.
Created the initial prototype for a Wireless heatmap application that shows Wi-fi coverage inside buildings.

C#.NET .NET Core ASP.NET LINQ Multi-threading programming Entity Framework Async Directory Service Active Directory Web API ADO.NET ASP.Classic Cloud Computing Performance Optimization Scrum SQLite SQL MSSQL

eTel Slovensko

IT Manager

2000 - 2009 (9 years)

Slovakia

Maintained essential IT operations for the TELCO operator, including the Internal Network (Windows) and Hardware management.
Performed software development for the TELCO CRM and ensured additional support processes.
Managed business-critical IT tasks and systems administration, evaluating emerging technologies, hardware, and software.

.NET C#LINQ Multi-threading programming Entity Framework Directory Service MVC Active Directory SQL MSSQL

Virtual Runners

Owner

1997 - 2019 (22 years)

Remote

Acted as IT Manager for multiple clients, analyzing business needs presented by companies and recommending technical solutions.
Defining, delivering, and supporting strategic plans to reach organization goals, strategies, practices, and projects.
Worked on the development of custom software solutions using several technologies.

.NET C#.NET Core ASP.NET ASP.NET Core Multi-threading programming Entity Framework Async Agile software development SQLite MVC Scrum Performance Optimization SQL MSSQL

Portfolio

Senior C# Developer / Technical Manager - Monitoring multicast network traffic

The project involved Monitoring network traffic for IP TV providers and other companies that use multicast (security cameras). I undertook the task of performing initial research for the project to understand the technology requirements in alignment with used network protocols and its implementation in Cisco routers. Managed to share vital information with the team and oversaw the work of the development team. Developed the whole back-end side in C# for the application. The project was successfully delivered within the required deadline. Technologies used in the project: Cisco Multicast routing, C#, ASP.NET, JavaScript.

Senior C# Developer / Technical Manager - Wireless heatmap and wireless client position

The Wireless heatmap shows Wi-fi coverage inside buildings. The Wireless client position calculates the position of mobile phones and notebooks inside a building. I created the initial prototype for the project, making thus possible to continue it. Researched for one year to be able to scope the most precise client location with a distance error of 15 feet. The final product was able to locate client positioning with an error of only 8 feet. Technologies used in the project: Cisco Wireless, C#, ASP.NET, JavaScript.

Senior C# Developer / Technical Manager - Monitoring F5 load balancers

The project involved monitoring internet traffic load balancers from F5 company. It checks the health condition of every part of the load-balanced network. F5 load balancers are used in data centers to balance internet traffic. Non-functional load balancer can route internet traffic to non-working web servers. I performed required research to learn how this technology works and what kind of relationships are among all parts of the load-balanced network. I configured the F5 devices for testing purposes. Acted as a knowledge source for all development teams (5 teams), also monitoring the status of hidden parts of the system. Technologies used in the project: F5 load balancers, C#, ASP.NET, JavaScript.

Senior C# Developer / Key Developer - Orion Log Manager

The project was an application that loads all log information from many devices and allows customers to search this information. It is important for administrators of computer networks. I built the product with a team in Brno in close collaboration with a team in Austin. One of our goals was to increase performance as our competitors that were using a Cloud environment and 20 servers could handle 60.000 logs per minute. Managed to increase performance to 30.000 logs per minute after 6 months of tuning and using only one server. Technologies used in the project: C#, ASP.NET, TypeScript.

Education

Microsoft Certified Professional Developer; Microsoft Certified Technology Specialist; .NET Framework 2.0, Windows Applications; .NET Framework 3.5, ADO.NET Applications; Microsoft Certified Solution Developer; Microsoft Certified Trainer; Microsoft Certified Solutions Associate Universal Windows Platform;

Certifications

Master‘s degree in Industrial Management

Slovak Technical University, Faculty of Material Science and Technology