Adrian Buda
Verified Expert in Engineering
Software Developer
Baia Mare, Maramureș County, Romania
Toptal member since January 26, 2026
Adrian is a senior .NET engineer and contractor with over nine years of experience. He specializes in designing clean, scalable, and cost-efficient software solutions that align with business goals. His work improves maintainability and optimizes long-term operational performance.
Portfolio
Experience
- C# - 9 years
- ASP.NET - 9 years
- Microsoft SQL Server - 7 years
- Microservices - 6 years
- Azure - 4 years
- GraphQL - 3 years
- Amazon Web Services (AWS) - 3 years
- Python - 2 years
Preferred Environment
Windows 10, Windows 11, Visual Studio, Visual Studio Code (VS Code), PyCharm
The most amazing...
...achievement has been optimizing existing Terraform scripts by reducing their complexity, which led to up to a 20% reduction in some AWS infrastructure costs.
Work Experience
Senior Full-stack Engineer
LichtBlick
- Enabled 100% reliable file uploads by designing and implementing a GraphQL file upload API, complete with testing scripts that also considered the low-code and no-code specifics requested.
- Improved the project's overall architecture by applying Command Query Responsibility Segregation (CQRS) principles.
- Improved user experience by 20% by standardizing how unauthorized responses are handled across the GraphQL application.
Senior Full-stack Engineer
IT Teams
- Improved the performance of common operations by up to 40% by cataloging indexes, removing unused ones, and rebuilding selected Microsoft SQL Server indexes.
- Reduced paper usage by 50% for a business unit by fixing bugs and using existing infrastructure to build a system that recognizes the business unit and its specific paper usage requirements.
- Drove the adoption of an Agile mindset and estimation practices.
Senior .NET Engineer | Technical Team Lead
Persistent Systems
- Improved localization information insights by 20% by integrating additional external data into the existing features.
- Enabled the release of the new Intersections feature by improving Elasticsearch query performance by 90% for large data sets.
- Engineered a reliable performance testing system based on Grafana k6.
Senior Full-stack Engineer
Cognizant Softvision
- Closed the modern features gap between our client and competitors and increased the innovation score by two points by integrating a cloud-based machine learning model that generates AI recommendations and refines them using user feedback.
- Secured 100% stability of the contract by delivering the barrel regauge module on time, drastically reducing development time and thus meeting contractual obligations.
- Reduced partners' financial losses by 95% by implementing a real-time system that alerts workers when a scanned barrel does not meet the whiskey recipe requirements.
Experience
Real Estate Management
Education
Master's Degree in Informatics and Software Engineering
Technical University of Cluj-Napoca - Baia Mare, Romania
Bachelor's Degree in Computer Science
Technical University of Cluj-Napoca - Baia Mare, Romania
Skills
Libraries/APIs
Entity Framework, jQuery
Tools
Visual Studio, JetBrains Rider, PyCharm
Languages
C#, SQL, GraphQL, JavaScript, Python
Frameworks
ASP.NET, .NET, Angular
Paradigms
Unit Testing, Microservices, REST, Object-oriented Programming (OOP)
Platforms
Visual Studio Code (VS Code), Azure, Amazon Web Services (AWS), Docker
Storage
Microsoft SQL Server, PostgreSQL, MongoDB, Elasticsearch, Relational Databases
Other
Windows 10, Windows 11, Team Leadership, Remote Team Leadership, Informatics, Computer Informatics, Distributed Systems, Operating Systems
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
Share your needs
Choose your talent
Start your risk-free talent trial
Top talent is in high demand.
Start hiring