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$50 USD / hora
Bandera de GREECE
athens, greece
$50 USD / hora
Aquí son las 5:35 p. m.
Se unió el abril 20, 2016
3 recomendaciones

Ioannis S.

@yianniss

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4,9 (25 comentarios)
5,6
5,6
100%
100%
$50 USD / hora
Bandera de GREECE
athens, greece
$50 USD / hora
92 %
Trabajos finalizados
81 %
Dentro del presupuesto
74 %
A tiempo
43 %
Tasa de recontratación

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

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).

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Comentarios

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Mostrando 1 - 5 de 20 reseñas
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5,0
€1.000,01 EUR
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
Software Architecture
HTML5
LESS/Sass/SCSS
Frontend Development
Angular Material
Avatar del usuario
Bandera de Daniele B.
@Zethion
hace 3 años
4,8
€467,50 EUR
I like the really expertise of Ioannis, rarely retrievable in other freelancers on this platform.
CSS
Software Architecture
HTML5
LESS/Sass/SCSS
Frontend Development
Avatar del usuario
Bandera de Daniele B.
@Zethion
hace 3 años
5,0
€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
C Programming
Visual Basic
Software Architecture
Node.js
+1 más
Avatar del usuario
Bandera de Daniele B.
@Zethion
hace 3 años
5,0
€25,43 EUR
Very satisfied for a complex analysis about front end CSS refactoring
C Programming
Visual Basic
Software Architecture
Node.js
+1 más
L
Closed User
@LaRaza
hace 3 años
3,6
$150,00 USD
Personal problems, didn't finish all the project. Very good released part, with his usual good quality code and expertise, can't give best ratio because project is incomplete for my purpose. Daniele
C Programming
Visual Basic
Software Architecture
Node.js
+1 más
L
Closed User
@LaRaza
hace 4 años

Experiencia

Director/Developer

Logismix Ltd
nov 2012 - Presente
- 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)

FO Tactical Developer

BGC Partners
ago 2011 - nov 2012 (1 año, 3 meses)
- 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.

FO RAD Developer, Equities Desk (AVP)

Deutsche Bank
jul 2010 - jul 2011 (1 año)
- 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

Educación

MSc Computer Science

Athens University of Economics and Business, Greece 2015 - 2016
(1 año)

MSc Banking & International Finance

Cass Business School, United Kingdom 2006 - 2007
(1 año)

BSc in Statistics

Athens University of Economics and Business, Greece 2000 - 2005
(5 años)

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