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Felhasználó avatár

Ioannis S.

@yianniss

annual-level-three.svgverified-v2.svg
4,9
26
5,7
5,7
93%

Expert Angular/Ionic/.NET/C++/VBA Developer

$50 USD / óra
 zászlója
Greece (9:45 de.)
Ekkor csatlakozott: április 20, 2016
$50 USD / óra
I have a diverse set of programming skills and 15+ years of programming experience. I pride myself on the high quality of code I produce as well as the depth of my knowledge in the areas I specialise. I am a very effective problem solver and I have a long history of 'getting things done'. I enjoy my job and I believe this reflects on the quality of my work. Skills breakdown: - Angular: With around 6 years of experience I consider myself an Angular expert. I am fond of the framework and I have spent significant time bettering my skills, over the years. Angular Material is my goto CSS framework but I also have experience with Bootstrap and advanced HTML/CSS skills. My typescript is advanced and my rxjs is intermediate to advanced. - Ionic: I have around 6 years of experience with development and maintenance of Angular-based Ionic applications. I am very familiar with the ins and outs of the framework starting from v3 all the way to the latest versions. I have worked with both Cordova and Capacitor and have successfully completed a number of v3 to v4+ migrations. I have fully working Windows and MacOS development machines so I am fully equipped to take on Ionic projects. - Node.js/NestJS: I have developed several Node.js apis. In the past 2 years I have adopted NestJS and have become advanced in its usage. I can produce high quality APIs including authentication, integration with Angular front-ends including JSON Web Tokens etc. - .NET: I have 10+ years of C# experience, mainly ASP.NET and in the recent years ASP.NET Core. I have developed a number of back-ends using .NET and I am very proficient in it. - C++: I started with C++ on Windows and Visual Studio at around 2006 (I started with COM/ ATL). Through the years I have been following the language closely and to this day it remains the language I have spent the most time with. I have adopted many of the 'modern' features of recent standards (lambdas, auto etc.) and I pride myself on the quality of code I write. It's hard to consider oneself an expert in C++, but I consider myself a very advanced C++ developer (I am fluent with templates etc.). From Excel plugins to high-performance cross-platform web servers I have successfully completed a high number of C++-based projects over the years. - VBA/Excel: VBA was the first programming language I adopted. I consider myself an expert in both VBA and the Excel object model. If it can be done in Excel/VBA then I most probably can get it done. For more demanding applications I have extensive experience with interfacing with Excel via C++ (both through COM and the XLL api).
Változtatások elmentve
4.9 · 26 Reviews
Értékelések
Felhasználó avatár
Project for Ioannis S. $1 722,67 CAD
Ioannis is highly experienced professional who goes above and beyond when working on the project. He delivers high quality solution and code quality. I have been working with Ioannis for years and am extremely satisfied with his deliverables, work ethic and professional communication style.
Taras G.
@tarasgleb
 zászlója
Thornhill, Canada
9 nappal ezelőtt
Megosztás
Felhasználó avatár
Greta pleasure work with Ioannis, always professional and real seniority application. Surely will evaluate other jobs. [01 December, 2020] Good job , continuing big project plan [01 December, 2020] Good job , continuing big project plan [07 December, 2020] Delays on delivery but great and hard work of refactoring and improvements. Hire again
Daniele B.
@Zethion
 zászlója
Reggio Emilia, Italy
4 évvel ezelőtt
Megosztás
Felhasználó avatár
I like the really expertise of Ioannis, rarely retrievable in other freelancers on this platform.
Daniele B.
@Zethion
 zászlója
Reggio Emilia, Italy
4 évvel ezelőtt
Megosztás
Felhasználó avatár
Project for Ioannis S. €302,91 EUR
Great job, analysis and elimination of unused CSS/SCSS code [02 November, 2020] Real seniority, professional and care about details. [04 November, 2020] Greta job, refactoring about dirty code - unused CSS/SCSS code elimination
Daniele B.
@Zethion
 zászlója
Reggio Emilia, Italy
4 évvel ezelőtt
Megosztás
L
Project for Ioannis S. -- 3 €25,43 EUR
Very satisfied for a complex analysis about front end CSS refactoring
Closed User
@LaRaza
 zászlója
,
4 évvel ezelőtt
Megosztás
Tapasztalat
Director/Developer
nov., 2012 – Jelenleg is
12 év, 2 hónap
Logismix Ltd
nov., 2012 - Jelenleg is
12 év, 2 hónap
- Developed Dynamic RibbonX (now rebranded as Ribbon Commander). An MS Office dynamic UI framework for the Office Ribbon. (Core in C++11/COM/ATL, services on MS Azure in C++/Casablanca, proprietary graphics framework based on Win32/GDI/GDI+/WTL, .NET projections) - Worked extensively in Ubuntu Linux, focusing on C++ and web development (HTML/CSS/Javascript/Apache2/FastCGI) - Worked on several electronics projects (Arduino, Esp8266, ATMEL)
nov., 2012 – Jelenleg is
12 év, 2 hónap
FO Tactical Developer
aug., 2011 - nov., 2012
1 év, 3 hónap
BGC Partners
aug., 2011 - nov., 2012
1 év, 3 hónap
- Developed libraries in C++, C#, VBA to extend the company's Excel platform focusing on performance, reliability, security and low-level control where necessary as well as client applications in VBA (Excel), C# (Winforms) and C++ (WTL). - Supported and enhanced add-ins both in C++ (COM, RTD servers, XLLs) and C# (VSTO, RTD, Managed XLLs). - Focused on security/auth infrastructure development for the excel platform, extending the existing VBA stack with C++/C# components where appropriate.
aug., 2011 - nov., 2012
1 év, 3 hónap
FO RAD Developer, Equities Desk (AVP)
júl., 2010 - júl., 2011
1 év
Deutsche Bank
júl., 2010 - júl., 2011
1 év
- Worked on the trading floor and directly interacted with traders/quants. - Developed and maintained applications in VBA (excel), C# and C++ (COM/ATL). - Paricipated in the migration of analytics libraries, and re-engineered a number of spreadsheets (including several mission-critical applications) with very good results/feedback. - Maintained and extended the existing VBA infrastructure focusing on reliability and good programming practices
júl., 2010 - júl., 2011
1 év
Tanulmányok
Athens University of Economics and Business
2015 - 2016
1 év
MSc Computer Science
 zászlója
Greece
2015 - 2016
1 év
Cass Business School
2006 - 2007
1 év
MSc Banking & International Finance
 zászlója
United Kingdom
2006 - 2007
1 év
Athens University of Economics and Business
2000 - 2005
5 év
BSc in Statistics
 zászlója
Greece
2000 - 2005
5 év
Képesítések
US English - Level 1
US English
Cikkek
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Hitelesítések
Határidőre
79%
Költségvetésen belül
84%
Elfogadási arány
100%
Ismételt megbízási arány
43%
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