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Costin T.

@SsjCosty

5.0
5

2.8

2.8

60%

Software Architect / Senior Engineer

$50 USD / Hour

・

Flag of

United Kingdom (5:59 AM)

・

Joined on August 1, 2010

$50 USD / Hour

・

Hands-on technical expert with extensive full-stack experience developing and supporting mission critical software applications since 2008. I have developed e-commerce solutions, property tech, mobile and tablet applications, APIs with microservice architectures. I supported large digital transformation projects, cloud migrations, new product development, and I've led development teams. Proficient in C#, .NET, ASP.NET, SQL, APIs, Azure cloud architectures, Terraform, CI/CD Pipelines, Powershell, Vue.js, Knockout JS, Auth0, CSS, HTML etc.

Verifications

On time

100%

On budget

100%

Accept rate

100%

Repeat hire rate

17%

Freelancer Javascript Developers United Kingdom
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Portfolio

Portfolio

25955
Several web-shops that I worked on extensively during my time in Denmark. I have integrated payment gateways into the company's e-commerce platform, implemented Google Analytics event tracking, automatic product feed generation for Google Merchant, Google Maps customization, dynamic CSS editor, quick order solution, etc. I have been a lead developer for many of the company's projects, combining project management and software development responsibilities.

Web-shops

Several web-shops that I worked on extensively during my time in Denmark. I have integrated payment gateways into the company's e-commerce platform, implemented Google Analytics event tracking, automatic product feed generation for Google Merchant, Google Maps customization, dynamic CSS editor, quick order solution, etc. I have been a lead developer for many of the company's projects, combining project management and software development responsibilities.

Web-shops

Several web-shops that I worked on extensively during my time in Denmark. I have integrated payment gateways into the company's e-commerce platform, implemented Google Analytics event tracking, automatic product feed generation for Google Merchant, Google Maps customization, dynamic CSS editor, quick order solution, etc. I have been a lead developer for many of the company's projects, combining project management and software development responsibilities.

Web-shops

Several web-shops that I worked on extensively during my time in Denmark. I have integrated payment gateways into the company's e-commerce platform, implemented Google Analytics event tracking, automatic product feed generation for Google Merchant, Google Maps customization, dynamic CSS editor, quick order solution, etc. I have been a lead developer for many of the company's projects, combining project management and software development responsibilities.

Web-shops

Several web-shops that I worked on extensively during my time in Denmark. I have integrated payment gateways into the company's e-commerce platform, implemented Google Analytics event tracking, automatic product feed generation for Google Merchant, Google Maps customization, dynamic CSS editor, quick order solution, etc. I have been a lead developer for many of the company's projects, combining project management and software development responsibilities.

Web-shops

Several web-shops that I worked on extensively during my time in Denmark. I have integrated payment gateways into the company's e-commerce platform, implemented Google Analytics event tracking, automatic product feed generation for Google Merchant, Google Maps customization, dynamic CSS editor, quick order solution, etc. I have been a lead developer for many of the company's projects, combining project management and software development responsibilities.

Web-shops

Several web-shops that I worked on extensively during my time in Denmark. I have integrated payment gateways into the company's e-commerce platform, implemented Google Analytics event tracking, automatic product feed generation for Google Merchant, Google Maps customization, dynamic CSS editor, quick order solution, etc. I have been a lead developer for many of the company's projects, combining project management and software development responsibilities.

Web-shops

22696
I was the lead developer for the e-commerce platform for mobile devices. I built a modular ASP.NET MVC structure, working on all layers of the project, up until launch – contracted the platform to 50 business customers in 2011, and 350 by the end of 2015. Initially used Zepto.js, a basic JavaScript mobile library. Here are some screenshots of some mobile web-shops built on this platform.

Mobile web-shop platform

I was the lead developer for the e-commerce platform for mobile devices. I built a modular ASP.NET MVC structure, working on all layers of the project, up until launch – contracted the platform to 50 business customers in 2011, and 350 by the end of 2015. Initially used Zepto.js, a basic JavaScript mobile library. Here are some screenshots of some mobile web-shops built on this platform.

Mobile web-shop platform

I was the lead developer for the e-commerce platform for mobile devices. I built a modular ASP.NET MVC structure, working on all layers of the project, up until launch – contracted the platform to 50 business customers in 2011, and 350 by the end of 2015. Initially used Zepto.js, a basic JavaScript mobile library. Here are some screenshots of some mobile web-shops built on this platform.

Mobile web-shop platform

I was the lead developer for the e-commerce platform for mobile devices. I built a modular ASP.NET MVC structure, working on all layers of the project, up until launch – contracted the platform to 50 business customers in 2011, and 350 by the end of 2015. Initially used Zepto.js, a basic JavaScript mobile library. Here are some screenshots of some mobile web-shops built on this platform.

Mobile web-shop platform

I was the lead developer for the e-commerce platform for mobile devices. I built a modular ASP.NET MVC structure, working on all layers of the project, up until launch – contracted the platform to 50 business customers in 2011, and 350 by the end of 2015. Initially used Zepto.js, a basic JavaScript mobile library. Here are some screenshots of some mobile web-shops built on this platform.

Mobile web-shop platform

I was the lead developer for the e-commerce platform for mobile devices. I built a modular ASP.NET MVC structure, working on all layers of the project, up until launch – contracted the platform to 50 business customers in 2011, and 350 by the end of 2015. Initially used Zepto.js, a basic JavaScript mobile library. Here are some screenshots of some mobile web-shops built on this platform.

Mobile web-shop platform

I was the lead developer for the e-commerce platform for mobile devices. I built a modular ASP.NET MVC structure, working on all layers of the project, up until launch – contracted the platform to 50 business customers in 2011, and 350 by the end of 2015. Initially used Zepto.js, a basic JavaScript mobile library. Here are some screenshots of some mobile web-shops built on this platform.

Mobile web-shop platform

I was the lead developer for the e-commerce platform for mobile devices. I built a modular ASP.NET MVC structure, working on all layers of the project, up until launch – contracted the platform to 50 business customers in 2011, and 350 by the end of 2015. Initially used Zepto.js, a basic JavaScript mobile library. Here are some screenshots of some mobile web-shops built on this platform.

Mobile web-shop platform

69533
An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

22714
A small presentation website I did in 2010 for a real estate agency, used jQuery animations.

Real estate website

22736
I've implemented various jQuery sliders, tab-panels, carousels, and other client-related functionalities.

JavaScript work

I've implemented various jQuery sliders, tab-panels, carousels, and other client-related functionalities.

JavaScript work

25955
Several web-shops that I worked on extensively during my time in Denmark. I have integrated payment gateways into the company's e-commerce platform, implemented Google Analytics event tracking, automatic product feed generation for Google Merchant, Google Maps customization, dynamic CSS editor, quick order solution, etc. I have been a lead developer for many of the company's projects, combining project management and software development responsibilities.

Web-shops

Several web-shops that I worked on extensively during my time in Denmark. I have integrated payment gateways into the company's e-commerce platform, implemented Google Analytics event tracking, automatic product feed generation for Google Merchant, Google Maps customization, dynamic CSS editor, quick order solution, etc. I have been a lead developer for many of the company's projects, combining project management and software development responsibilities.

Web-shops

Several web-shops that I worked on extensively during my time in Denmark. I have integrated payment gateways into the company's e-commerce platform, implemented Google Analytics event tracking, automatic product feed generation for Google Merchant, Google Maps customization, dynamic CSS editor, quick order solution, etc. I have been a lead developer for many of the company's projects, combining project management and software development responsibilities.

Web-shops

Several web-shops that I worked on extensively during my time in Denmark. I have integrated payment gateways into the company's e-commerce platform, implemented Google Analytics event tracking, automatic product feed generation for Google Merchant, Google Maps customization, dynamic CSS editor, quick order solution, etc. I have been a lead developer for many of the company's projects, combining project management and software development responsibilities.

Web-shops

Several web-shops that I worked on extensively during my time in Denmark. I have integrated payment gateways into the company's e-commerce platform, implemented Google Analytics event tracking, automatic product feed generation for Google Merchant, Google Maps customization, dynamic CSS editor, quick order solution, etc. I have been a lead developer for many of the company's projects, combining project management and software development responsibilities.

Web-shops

Several web-shops that I worked on extensively during my time in Denmark. I have integrated payment gateways into the company's e-commerce platform, implemented Google Analytics event tracking, automatic product feed generation for Google Merchant, Google Maps customization, dynamic CSS editor, quick order solution, etc. I have been a lead developer for many of the company's projects, combining project management and software development responsibilities.

Web-shops

Several web-shops that I worked on extensively during my time in Denmark. I have integrated payment gateways into the company's e-commerce platform, implemented Google Analytics event tracking, automatic product feed generation for Google Merchant, Google Maps customization, dynamic CSS editor, quick order solution, etc. I have been a lead developer for many of the company's projects, combining project management and software development responsibilities.

Web-shops

22696
I was the lead developer for the e-commerce platform for mobile devices. I built a modular ASP.NET MVC structure, working on all layers of the project, up until launch – contracted the platform to 50 business customers in 2011, and 350 by the end of 2015. Initially used Zepto.js, a basic JavaScript mobile library. Here are some screenshots of some mobile web-shops built on this platform.

Mobile web-shop platform

I was the lead developer for the e-commerce platform for mobile devices. I built a modular ASP.NET MVC structure, working on all layers of the project, up until launch – contracted the platform to 50 business customers in 2011, and 350 by the end of 2015. Initially used Zepto.js, a basic JavaScript mobile library. Here are some screenshots of some mobile web-shops built on this platform.

Mobile web-shop platform

I was the lead developer for the e-commerce platform for mobile devices. I built a modular ASP.NET MVC structure, working on all layers of the project, up until launch – contracted the platform to 50 business customers in 2011, and 350 by the end of 2015. Initially used Zepto.js, a basic JavaScript mobile library. Here are some screenshots of some mobile web-shops built on this platform.

Mobile web-shop platform

I was the lead developer for the e-commerce platform for mobile devices. I built a modular ASP.NET MVC structure, working on all layers of the project, up until launch – contracted the platform to 50 business customers in 2011, and 350 by the end of 2015. Initially used Zepto.js, a basic JavaScript mobile library. Here are some screenshots of some mobile web-shops built on this platform.

Mobile web-shop platform

I was the lead developer for the e-commerce platform for mobile devices. I built a modular ASP.NET MVC structure, working on all layers of the project, up until launch – contracted the platform to 50 business customers in 2011, and 350 by the end of 2015. Initially used Zepto.js, a basic JavaScript mobile library. Here are some screenshots of some mobile web-shops built on this platform.

Mobile web-shop platform

I was the lead developer for the e-commerce platform for mobile devices. I built a modular ASP.NET MVC structure, working on all layers of the project, up until launch – contracted the platform to 50 business customers in 2011, and 350 by the end of 2015. Initially used Zepto.js, a basic JavaScript mobile library. Here are some screenshots of some mobile web-shops built on this platform.

Mobile web-shop platform

I was the lead developer for the e-commerce platform for mobile devices. I built a modular ASP.NET MVC structure, working on all layers of the project, up until launch – contracted the platform to 50 business customers in 2011, and 350 by the end of 2015. Initially used Zepto.js, a basic JavaScript mobile library. Here are some screenshots of some mobile web-shops built on this platform.

Mobile web-shop platform

I was the lead developer for the e-commerce platform for mobile devices. I built a modular ASP.NET MVC structure, working on all layers of the project, up until launch – contracted the platform to 50 business customers in 2011, and 350 by the end of 2015. Initially used Zepto.js, a basic JavaScript mobile library. Here are some screenshots of some mobile web-shops built on this platform.

Mobile web-shop platform

69533
An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

An iPad magazine reader done for a client, with page animations, zooming and panning, and lazy loading of resources. I developed two iPad/iPhone apps for children, which included story books, coloring books, and various small games (dress-up, puzzle, lottery). I used a set of specialized JavaScript libraries for building the apps using sprite animations, sound, interactions, resource loading, drawing, etc.

iPad/iPhone Apps

22714
A small presentation website I did in 2010 for a real estate agency, used jQuery animations.

Real estate website

22736
I've implemented various jQuery sliders, tab-panels, carousels, and other client-related functionalities.

JavaScript work

I've implemented various jQuery sliders, tab-panels, carousels, and other client-related functionalities.

JavaScript work

5.0 · 5 Reviews
Reviews
User Avatar

Image loop in Jquery • $130 USD

Great expert! Nice comunication and has great skills. Already working on a new project. Happy to work with him.

Merel H.

@merel

•

Flag of

Delft, Netherlands

•

15 years ago

Share

User Avatar

Video gallery for WordPress using NextGen • $50 USD

VERY clear instructions and very fast work! Thank you!

Barry P.

@BarryWebSEO

•

Flag of

Crestview, United States

•

15 years ago

Share

T

HTML5 Site Recode • $250 USD

Quoted 1 week, but still incomplete 2 months on. Sorry, took too long - have gone elsewhere.

telekinesys

@telekinesys

•

Flag of

Weymouth, United Kingdom

•

15 years ago

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User Avatar

Create a Web site side menu tab that pins to page • $85 USD

Did a GREAT Job! Will hire again.

Sean L.

@born2net

•

Flag of

Westlake Village, CA, United States

•

15 years ago

Share

M

DNN Database Copy revised price • $80 USD

To be fair this is a tricky project as the hosts make it difficult to copy the database. Thank you for trying.

Marcus

@mknaidoo

•

Flag of

Stockport, United Kingdom

•

15 years ago

Share

Experience

Zoopla

Apr, 2016 - Feb, 2022

•

5 years, 10 months

Software Architect

Apr, 2021 - Feb, 2022

•

10 months

• Responsible for the technical leadership of one product delivery group. • Coordinated development and delivery using SCRUM. • Responsible for identifying, comparing and selecting off-the-shelf solutions, and determining the most well-suited architectural patterns for integrating them into the business. • Added mortgage risk capabilities to company's flaghsip property valuation product. • Used Synapse Analytics to greatly improve data build process, decreasing build time from 40h to 5h.

Senior Software Engineer

Apr, 2016 - Apr, 2021

•

5 years

• Developed property valuation products - contracted to banks: HSBC, Bank of Ireland, Barclays, NatWest. • Supported a company-wide cloud migration project to Azure. Hands-on involvement. • Broke down monoliths, developed new microservices in Azure. • Wrote Terraform scripts, augmented with PowerShell and ARM templates. • Developed public facing APIs. • Created CI/CD pipelines. • Test Driven Development.

Apr, 2016 - Feb, 2022

•

5 years, 10 months

Software Developer

Mar, 2011 - Mar, 2015

•

4 years

MCB

Mar, 2011 - Mar, 2015

•

4 years

• Lead developer for MCB's e-commerce platform for mobile devices. • Implemented a new payment system and integrated several payment gateways: QuickPay, AltaPay, Klarna. • Built a quick-order page with Knockout JS. • Implemented Google Analytics event tracking. • Implemented a dynamic slideshow module, with management page in backend CMS. • Developed new CMS admin pages with Angular JS - Google Analytics management, video management with Youtube API, price discounts.

Mar, 2011 - Mar, 2015

•

4 years

Software Developer

Dec, 2009 - Dec, 2010

•

1 year

Solution Oriented Software

Dec, 2009 - Dec, 2010

•

1 year

Worked on a governmental project for border control – a web interface for controlling hardware installed at several Romanian customs. Other projects involved a web-shop, a job portal and a few presentation websites.

Dec, 2009 - Dec, 2010

•

1 year

Education

Aarhus Universitet

2011 - 2015

•

4 years

MSc. in Technology Based Busines Development

Flag of

Denmark

2011 - 2015

•

4 years

Universitatea din Bucuresti

2007 - 2010

•

3 years

BSc. in Computer Science

Flag of

Romania

2007 - 2010

•

3 years

Certifications

ASP.NET - Level 1

ASP.NET

G

General Orientation Exam

F

Foundation vWorker Member

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