.NET Developer

.NET Developer (Diebold Nixdorf) - August 2023 - present
CTM
Huge legacy project required maintenance & modernization in order to keep up with the continuously rising demands of customers and huge data ingestion & consumption.

1. Optimized stored procedure execution time from 35+ seconds to 17-18 seconds by identifying and removing the root cause of poor execution plan selection.
2. Reduced execution time by 50% for regression tests and greatly increased team’s productivity by reimplementing and refactoring existing poorly optimized code base & infrastructure framework.
3. Reduced deployment time by 25% by creating proper detailed documentation for dealing with all the manual actions required in the deployment process.
4. Eliminated weekly manual action for synchronizing dashboard items and tickets by analyzing, testing and identifying the root cause and fixing the underlying issue in the automation process.

Skills: C#, .NET Framework/Core/8, Azure: SQL, BlobStorage, Webjobs, AppInsights, Data Factory; Big Query, ADO.NET, Azure DevOps, Pipelines, xUnit.

---

.NET Developer (European Dynamics) - Jan 2023 – December 2023
SABS
Technologically outdated social security system required an immediate modernization to the highest tech standards using cloud technologies.

1. Played a key role in close cooperation with the main architect in rewriting the backend API from scratch, developing essential endpoints across the API, service, and database layers.
2. Increased safety & trust by ensuring 100% unit test coverage by implementing the entire infrastructure along with the actual tests for all API endpoints and models.
3. Decreased development time for other projects by implementing several parts of the initial project infrastructure which would serve as example later for other teams.

Skills: C#, .NET 7, Blazor, EF Core, Azure DevOps, SQL, Unit testing, Ardalis.

---

.NET Developer (Nordcloud) - Nov 2021 - July 2022
iPSL
Technologically outdated, slow and expensive, the legacy cheque payment processing system required to be modernized and brought up from on-premise to the latest technologies in cloud in order to cut down the costs long term.

1. Decreased by a factor of 10x the manual validation activity of message files by extracting all validation errors in one go instead of incremental steps.
2. Ensured 100% clarity and increased trust by refactoring big blobs of spaghetti code to clear and concise pieces of functionality.
3. Contributed to the overall flow performance from hours to minutes by rewriting the business logic in the context of serverless architecture using latest cloud technologies.

Skills: C#, .NET Core, Azure: Durable Functions, Cosmos DB, Blob Storage, Service Bus; xUnit, SpecFlow, Unit/Integration testing.

---

.NET Developer (New Signature/Cognizant) - Mar 2021 - Nov 2021
Elexon
Very slow, technologically outdated and prone to mistakes, the legacy energy volume Settlement system needed to be rewritten from scratch and run as a collection of cloud native applications with a design of Microservices architecture.

1. Decreased development time from 3-5 days to 4-6 hours by contributing to the implementation of pipeline solution for incremental steps of specific energy volumes calculation
2. Contributed to reporting pipeline operation step performance from 5 minutes to 1 second by removing unnecessary data fetch calls.
3. Ensured 100% transparency and increased trust by contributing to solution implementation of automated validation of 1 month worth of data calculation against legacy system
4. Contributed to the overall settlement run performance from hours to minutes by rewriting the business logic in the context of running microservices as cloud native applications

Skills: C#, .NET Core, EF Core, WebAPI, Azure: SQL Server, Cosmos DB, Data Lake, Blob Storage, Service Bus; xUnit, SpecFlow, Unit/Integration testing.

---

.NET Developer (Cegeka) - Oct 2018 - Mar 2021
NN Direct
Because of very low user retention, the insurance & pension app required a complete revamp in order to bring back the users and offer an enriched experience.

1. Decreased in-production release time by at least 1.5 months by contributing to the implementation of an API service aggregator of the client's on-premise services and bridging the communication between the development team and the client's team
2. Increased product lead generation by 64% in 3 months since the initial revamped version was released by implementing product suggestion screen
3. Ensured 100% app usage transparency by integrating means of user interaction analytics
4. Contributed to the overall increase in star rating with 0.4 on Android and 0.6 on iOS and increase of 50k+ app installation in 5 months by designing the solution for the notification messages mechanism and implementing product details screens

Skills: C#, .NET Core, React Native, EF Core, Dapper, WebAPI, Firebase Analytics, Azure: App Service, SQL Server, Blob Storage, Key Vault, CI/CD Pipelines, Git, CQRS
-----------------------------------------------------------------------------

Invoice converter
The new fiscality laws in the country forced the client to change all its invoices to a new format - a 3-month task, which due to lack of time and personnel, was assigned to a single person in order to be completed in less than 4 weeks.

1. Drastically reduced the conversion process from 3 months to only 30 minutes by designing a solution to fully automate the conversion process using only the raw invoice data as input. Prevented tens of thousands of dollars in losses as a result.

Skills: C#, WinForms, SyncFusion, Azure DevOps, VS Installer tool
-----------------------------------------------------------------------------

Crop spray plan creator
The app used in order to generate and export crop spray plans for individual farmers had long data sync times and a painstaking pdf file exporting process causing low productivity level for employees.

1. Decreased data sync time from 15-30 minutes to an average of 3 minutes by filtering an enormous load of information that was not required in the business flow
2. Increased employee productivity by 30% by designing a solution for pdf export file preview and by adding support in the app to be used on faster devices

Skills: C#, .NET Core, SyncFusion, SQL Server, Javascript, Angular (Typescript), PrimeNG, Xamarin, Azure DevOps, Git

---

.NET Developer (RomSoft) - Mar 2014 - Sep 2018
Extended IPU
Very low transparency on the hotfix delivery process was potentially harmful to the top quality of the product in such an important and delicate business as automated medical analysis.

1. Accomplished 100% transparency, increased trust and safety level by contributing to the designing and implementation of a hotfix delivery application
2. Contributed to an increase of 400+ installs in 4 years in several medical laboratories in the world by adding data interpretation support for new automated analyzers

Skills: C#, WinForms, SQL Server, TeamCity CI/CD Pipelines, CSLA, DevExpress, TFS, NUnit, Unit Testing, Integration Testing, UI Testing

---

Software developer (Mauve AG) - Jan 2012 - Mar 2014
Automated trading simulator
As the client lacked data accuracy information, the automated trading simulators performed badly implying a serious risk of heavy money loss.

1. Accomplished 100% data accuracy and avoided 6 figure dollar amount loss per year by designing and implementing a solution that scanned, mapped and labelled all the collected financial data from the stock exchange data provider that was used afterwards in the trading algorithms.

Skills: JavaScript, HTML, CSS, SQL, Oracle SQL, C++, Qt, d3.js, jQuery, Raphael.js