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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 (4:40 AM)
・
Joined on June 1, 2012
$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
Changes saved
5.0 · 34 Reviews
Reviews
Q
Project for David Raul D. • $16,000 ARS
Todo excelente!
Matias M.
@qwpolazm
•
Flag of
Merlo, Argentina
•
7 years ago
Share
User Avatar
Converting graphical designs into HTML • $760.38 USD
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.
Christian G.
@chrris
•
Flag of
Wiener Neustadt, Austria
•
7 years ago
Share
User Avatar
Hire a Back End Developer • $4,274.80 USD
Job done as expected.
Dmitry M.
@dmnushkin
•
Flag of
N/A, Bermuda
•
7 years ago
Share
S
Create advanced production order system with bill of materials (ERP). • $1,041.50 USD
Fluent work
Sven D.
@sven0074
•
Flag of
Aalst, Belgium
•
7 years ago
Share
User Avatar
Hourly Work on My Client's Code Base • $1,371.56 USD
David was very responsive and was able to do everything I asked him to do.
Rob B.
@rblackin
•
Flag of
East Brunswick, United States
•
7 years ago
Share
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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