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David Raul D.

@ddonari

5.0
34

7.2

7.2

98%

Full Stack Software Engineer

$40 USD / Hour

・

Flag of

Argentina (2:08 AM)

・

Joined on June 1, 2012

・

4 Recommendations

$40 USD / Hour

・

Hello, my name is David. With a Bachelor’s degree in Computer Science, Ph.D. degree in Real Time Systems, and hands-on experience using languages to create and implement software applications. I would like to highlight that would enable me to contribute to your bottom line are: Highly skilled in designing, and developing software Thorough understanding of data structures and algorithms Knowledgeable of back-end development best practices Hands-on software troubleshooting experience Proven track record of proper documentation for future maintenance and upgrades Language skills Server side: C# - Java - ASP.NET - PHP - ASP.NET MVC - .NET Client side: HTML-5 - jQuery - Javascript - Angular DB skills Microsoft SQL Server - Oracle Cassandra - MongoDB Extras: Bootstrap . Git .REST . Azure . DevExpress . Entity Framework. Linux . AWS . BigData. RabbitMQ

Verifications

On time

100%

On budget

100%

Accept rate

88%

Repeat hire rate

15%

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Portfolio

Portfolio

2683510
1 Input : connection string (ip-username-password) (kept in memory) 2 Buton CONNECT 3 List all database 4-Check box database we want to update 5-Browse button to select .SQL file to execute on all DATABASE check in step 4

C# App which executes script on multiple SQL express DB's

1 Input : connection string (ip-username-password) (kept in memory) 2 Buton CONNECT 3 List all database 4-Check box database we want to update 5-Browse button to select .SQL file to execute on all DATABASE check in step 4

C# App which executes script on multiple SQL express DB's

1 Input : connection string (ip-username-password) (kept in memory) 2 Buton CONNECT 3 List all database 4-Check box database we want to update 5-Browse button to select .SQL file to execute on all DATABASE check in step 4

C# App which executes script on multiple SQL express DB's

1 Input : connection string (ip-username-password) (kept in memory) 2 Buton CONNECT 3 List all database 4-Check box database we want to update 5-Browse button to select .SQL file to execute on all DATABASE check in step 4

C# App which executes script on multiple SQL express DB's

3273487
Architecture: Linux / Node.js MEAN stack -Mqtt broker data exchange with database. -PUB/SUB Library (mosquito). -Google maps with data item visualization. -User login wit passport (Google, Facebook). -User data with form for approx. 20 data items, persistence in database.

Data Collector from Remote Devices

2767619
Software which converts the stock data into higher intervals such: X second X minute Daily Weekly Monthly Quarterly Yearly based on the various types of inputs and provides various types of outputs.

Stock Market Data Converter

2720424
- Geolocation App for IOS, Adroid - Monitoring Web App - Backend (php,mysql)

Geolocation App

- Geolocation App for IOS, Adroid - Monitoring Web App - Backend (php,mysql)

Geolocation App

2720413
A bank reconciliation is a process performed by a company to ensure that the company's records (check register, general ledger account, balance sheet, etc.) are correct and that the bank's records are also correct. Tools /////////// ASP.NET DevExpress SQL SERVER Entity Framework

Sistema de Conciliaciones Bancarias (ASP.NET / DevExpress )

A bank reconciliation is a process performed by a company to ensure that the company's records (check register, general ledger account, balance sheet, etc.) are correct and that the bank's records are also correct. Tools /////////// ASP.NET DevExpress SQL SERVER Entity Framework

Sistema de Conciliaciones Bancarias (ASP.NET / DevExpress )

A bank reconciliation is a process performed by a company to ensure that the company's records (check register, general ledger account, balance sheet, etc.) are correct and that the bank's records are also correct. Tools /////////// ASP.NET DevExpress SQL SERVER Entity Framework

Sistema de Conciliaciones Bancarias (ASP.NET / DevExpress )

A bank reconciliation is a process performed by a company to ensure that the company's records (check register, general ledger account, balance sheet, etc.) are correct and that the bank's records are also correct. Tools /////////// ASP.NET DevExpress SQL SERVER Entity Framework

Sistema de Conciliaciones Bancarias (ASP.NET / DevExpress )

2685251
Includes: /Reservations /Rooms /Clients /Companions /Taxes Implemented with ASP.NET - SQL SERVER - Javascript - DevExpress

Cloud Hotel Reservation System

Includes: /Reservations /Rooms /Clients /Companions /Taxes Implemented with ASP.NET - SQL SERVER - Javascript - DevExpress

Cloud Hotel Reservation System

Includes: /Reservations /Rooms /Clients /Companions /Taxes Implemented with ASP.NET - SQL SERVER - Javascript - DevExpress

Cloud Hotel Reservation System

Includes: /Reservations /Rooms /Clients /Companions /Taxes Implemented with ASP.NET - SQL SERVER - Javascript - DevExpress

Cloud Hotel Reservation System

Includes: /Reservations /Rooms /Clients /Companions /Taxes Implemented with ASP.NET - SQL SERVER - Javascript - DevExpress

Cloud Hotel Reservation System

2683510
1 Input : connection string (ip-username-password) (kept in memory) 2 Buton CONNECT 3 List all database 4-Check box database we want to update 5-Browse button to select .SQL file to execute on all DATABASE check in step 4

C# App which executes script on multiple SQL express DB's

1 Input : connection string (ip-username-password) (kept in memory) 2 Buton CONNECT 3 List all database 4-Check box database we want to update 5-Browse button to select .SQL file to execute on all DATABASE check in step 4

C# App which executes script on multiple SQL express DB's

1 Input : connection string (ip-username-password) (kept in memory) 2 Buton CONNECT 3 List all database 4-Check box database we want to update 5-Browse button to select .SQL file to execute on all DATABASE check in step 4

C# App which executes script on multiple SQL express DB's

1 Input : connection string (ip-username-password) (kept in memory) 2 Buton CONNECT 3 List all database 4-Check box database we want to update 5-Browse button to select .SQL file to execute on all DATABASE check in step 4

C# App which executes script on multiple SQL express DB's

3273487
Architecture: Linux / Node.js MEAN stack -Mqtt broker data exchange with database. -PUB/SUB Library (mosquito). -Google maps with data item visualization. -User login wit passport (Google, Facebook). -User data with form for approx. 20 data items, persistence in database.

Data Collector from Remote Devices

2767619
Software which converts the stock data into higher intervals such: X second X minute Daily Weekly Monthly Quarterly Yearly based on the various types of inputs and provides various types of outputs.

Stock Market Data Converter

2720424
- Geolocation App for IOS, Adroid - Monitoring Web App - Backend (php,mysql)

Geolocation App

- Geolocation App for IOS, Adroid - Monitoring Web App - Backend (php,mysql)

Geolocation App

2720413
A bank reconciliation is a process performed by a company to ensure that the company's records (check register, general ledger account, balance sheet, etc.) are correct and that the bank's records are also correct. Tools /////////// ASP.NET DevExpress SQL SERVER Entity Framework

Sistema de Conciliaciones Bancarias (ASP.NET / DevExpress )

A bank reconciliation is a process performed by a company to ensure that the company's records (check register, general ledger account, balance sheet, etc.) are correct and that the bank's records are also correct. Tools /////////// ASP.NET DevExpress SQL SERVER Entity Framework

Sistema de Conciliaciones Bancarias (ASP.NET / DevExpress )

A bank reconciliation is a process performed by a company to ensure that the company's records (check register, general ledger account, balance sheet, etc.) are correct and that the bank's records are also correct. Tools /////////// ASP.NET DevExpress SQL SERVER Entity Framework

Sistema de Conciliaciones Bancarias (ASP.NET / DevExpress )

A bank reconciliation is a process performed by a company to ensure that the company's records (check register, general ledger account, balance sheet, etc.) are correct and that the bank's records are also correct. Tools /////////// ASP.NET DevExpress SQL SERVER Entity Framework

Sistema de Conciliaciones Bancarias (ASP.NET / DevExpress )

2685251
Includes: /Reservations /Rooms /Clients /Companions /Taxes Implemented with ASP.NET - SQL SERVER - Javascript - DevExpress

Cloud Hotel Reservation System

Includes: /Reservations /Rooms /Clients /Companions /Taxes Implemented with ASP.NET - SQL SERVER - Javascript - DevExpress

Cloud Hotel Reservation System

Includes: /Reservations /Rooms /Clients /Companions /Taxes Implemented with ASP.NET - SQL SERVER - Javascript - DevExpress

Cloud Hotel Reservation System

Includes: /Reservations /Rooms /Clients /Companions /Taxes Implemented with ASP.NET - SQL SERVER - Javascript - DevExpress

Cloud Hotel Reservation System

Includes: /Reservations /Rooms /Clients /Companions /Taxes Implemented with ASP.NET - SQL SERVER - Javascript - DevExpress

Cloud Hotel Reservation System

5.0 · 34 Reviews
34 Reviews
Q
Flag of

Matias M.

5.0

$16,000 ARS

8 years ago

Project for David Raul D.

Todo excelente!

ASP
SQL
HTML
jQuery / Prototype

+1 more

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Christian G.

5.0

$760.38 USD

9 years ago

Converting graphical designs into HTML

It really was a pleasure for me to get David to know. I'll definitely will work together with him. Great communication, great flexibility, great knowledge.

HTML
ASP.NET

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Dmitry M.

5.0

$4,274.80 USD

9 years ago

Hire a Back End Developer

Job done as expected.

.NET
Cloud Computing
C# Programming
Software Architecture
JSON

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S
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Sven D.

5.0

$1,041.50 USD

9 years ago

Create advanced production order system with bill of materials (ERP).

Fluent work

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Rob B.

4.4

$1,371.56 USD

9 years ago

Hourly Work on My Client's Code Base

David was very responsive and was able to do everything I asked him to do.

Software Architecture
ASP.NET

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Experience

Senior BackEnd Software Engineer

Oct, 2013 - Dec, 2016

•

3 years, 2 months

Grower Ideas

Oct, 2013 - Dec, 2016

•

3 years, 2 months

Working with Backend Services which support a variety of front end websites, potentially developed with different technologies.

Oct, 2013 - Dec, 2016

•

3 years, 2 months

Education

Phd

2006 - 2011

•

5 years

Flag of

Argentina

2006 - 2011

•

5 years

Universidad Nacional del Sur

2000 - 2006

•

6 years

Computer Engineer

Flag of

Argentina

2000 - 2006

•

6 years

Qualifications

Doctorate Scholarship

2011

CONICET

Thesis Topic: "Study and Design of Real-Time Operating Systems for Embedded Systems Microprocessors"

2011

Publications

Scheduler Implementation for Small Embedded Systems

Scheduler Implementation for Small Embedded Systems

Scheduling techniques for small embedded system. The main contribution of the work is related to the way in which the kernel is organized to schedule and dispatch tasks. This is done based on special data structures that allow a very fast search of the next higher priority task ready to execute. This is achieved without producing a significant increment on the amount of memory required to implement the mechanism and at the same time keeping the footprint smaller than other kernels.

Certifications

Spanish - Level 1

Spanish

Basic Numeracy - Level 1

Basic Numeracy

P

Preferred Freelancer Program SLA

E

Employer Orientation Exam

US English - Level 1

US English

C Programming - Level 1

C Programming

C# Programming - Level 1

C# Programming

C# Programming - Level 2

C# Programming

Freelancer Orientation

Freelancer Orientation

UK English - Level 1

UK English

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