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$35 USD / hour
Flag of VENEZUELA
maracaibo, venezuela
$35 USD / hour
It's currently 12:58 PM here
Joined November 23, 2020
1 Recommendation

Efraín José R.

@niarfedevelop

monthly-level-two.svg
4.6 (41 reviews)
5.3
5.3
$35 USD / hour
Flag of VENEZUELA
maracaibo, venezuela
$35 USD / hour
96%
Jobs Completed
87%
On Budget
90%
On Time
21%
Repeat Hire Rate

EXPERT IN SOFTWARE DEVELOPMENT / BACKEND /DBA

Database modeling and creation specialist, RestFul Api creation, SQL query optimization, management of NoSql data managers. Expert in SQL, PL/SQL. Database developer. Expert in data replication MYSQL SERVER and MARIADB SERVER, master-master, master-slave and Multi-source replication (several masters a single slave). Extensive Experience Development and Maintenance of Desktop Systems (PRODUCTION, INVENTORY, PURCHASES, SALES, PAYMENTS, ACCOUNTING, BANK CONCILIATION, PROCESS CALCULATION OF PRICES BASED ON COST MANAGEMENT, AMONG OTHERS). Extensive Experience Development and Maintenance of Websites. Expert in Point of Sale System. Experience in implementation of fiscal printers (Bixolon Srp 270, Bixolon Srp 350, Bixolon Srp 812, Tally, Okidata, among other printer models) More than 10 years of experience working with ERP (Example : ERP Adaptapro Venezuela) Expert in Odoo System, Dolibarr, I provide the support service for new adaptations, implementations, maintenance, among others. Payroll system experience, fingerprint capture system. Expert in creating all kinds of reports with CRYSTAL REPORT, PHP, JAVA, among others. JAVA PHP JSP PYTHON (PyChart, Qt Designer) NODEJS LOOPBACK TYPESCRIPT REACT C# BLAZOR SERVER RADZEN BLAZOR COMPONET VISUAL BASIC 6.0 DELFI VB.NET HTML XML JAVASCRIT BOOTSTRAP CSS MS ACCESS MYSQL SERVER POSTGRESQL MARIADB SQL SERVER ORACLE MONGODB SQL, PL/SQL CRYSTAL REPORT UML WORDPRESS DOMPDF
Freelancer MySQL Developers Venezuela

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Portfolio Items

Convertidor de Bases Numéricas con JAVASCRIPT, HTML, CSS y BOOTSTRAP.
Convertidor de Bases Numéricas con JAVASCRIPT, HTML, CSS
C# application with TXT files for enrollment process and payment of student fees
C# Application With TXT Files for Registration Process
C# application with TXT files for enrollment process and payment of student fees
C# Application With TXT Files for Registration Process
C# application with TXT files for enrollment process and payment of student fees
C# Application With TXT Files for Registration Process
C# application with TXT files for enrollment process and payment of student fees
C# Application With TXT Files for Registration Process
C# application with TXT files for enrollment process and payment of student fees
C# Application With TXT Files for Registration Process
C# application with TXT files for enrollment process and payment of student fees
C# Application With TXT Files for Registration Process
Development of application for inventory of pipes per unit and cuts, using PHP 8.0, MARIADB 10.5, JAVASCRIPT, JQUERY, AJAX.
Simple Web Application for Inventory Management
Development of application for inventory of pipes per unit and cuts, using PHP 8.0, MARIADB 10.5, JAVASCRIPT, JQUERY, AJAX.
Simple Web Application for Inventory Management
Development of application for inventory of pipes per unit and cuts, using PHP 8.0, MARIADB 10.5, JAVASCRIPT, JQUERY, AJAX.
Simple Web Application for Inventory Management
Development of application for inventory of pipes per unit and cuts, using PHP 8.0, MARIADB 10.5, JAVASCRIPT, JQUERY, AJAX.
Simple Web Application for Inventory Management
Development of application for inventory of pipes per unit and cuts, using PHP 8.0, MARIADB 10.5, JAVASCRIPT, JQUERY, AJAX.
Simple Web Application for Inventory Management
Development of application for inventory of pipes per unit and cuts, using PHP 8.0, MARIADB 10.5, JAVASCRIPT, JQUERY, AJAX.
Simple Web Application for Inventory Management
Development of application for inventory of pipes per unit and cuts, using PHP 8.0, MARIADB 10.5, JAVASCRIPT, JQUERY, AJAX.
Simple Web Application for Inventory Management
Development of application for inventory of pipes per unit and cuts, using PHP 8.0, MARIADB 10.5, JAVASCRIPT, JQUERY, AJAX.
Simple Web Application for Inventory Management
Creation of application with user authentication by levels, CRUD and sending of mail when registering the user. Visual studio 2019 was used with VB.NET and ACCESS and GMAIL email account for sending mail via SMTP.
Authentication with VB.NET and Access user levels, send Mail
Creation of application with user authentication by levels, CRUD and sending of mail when registering the user. Visual studio 2019 was used with VB.NET and ACCESS and GMAIL email account for sending mail via SMTP.
Authentication with VB.NET and Access user levels, send Mail
Creation of application with user authentication by levels, CRUD and sending of mail when registering the user. Visual studio 2019 was used with VB.NET and ACCESS and GMAIL email account for sending mail via SMTP.
Authentication with VB.NET and Access user levels, send Mail
Creation of application with user authentication by levels, CRUD and sending of mail when registering the user. Visual studio 2019 was used with VB.NET and ACCESS and GMAIL email account for sending mail via SMTP.
Authentication with VB.NET and Access user levels, send Mail
Application in Bazor Server, .NET 5.0, Dapper, SQL SERVER, Radzen Blazor Componet, C #, HTML, Bootstrap.
App in Bazor Server, .NET 5.0, Dapper, SQL SERVER, Radzen
Application in Bazor Server, .NET 5.0, Dapper, SQL SERVER, Radzen Blazor Componet, C #, HTML, Bootstrap.
App in Bazor Server, .NET 5.0, Dapper, SQL SERVER, Radzen
Application in Bazor Server, .NET 5.0, Dapper, SQL SERVER, Radzen Blazor Componet, C #, HTML, Bootstrap.
App in Bazor Server, .NET 5.0, Dapper, SQL SERVER, Radzen
Application in Bazor Server, .NET 5.0, Dapper, SQL SERVER, Radzen Blazor Componet, C #, HTML, Bootstrap.
App in Bazor Server, .NET 5.0, Dapper, SQL SERVER, Radzen
Application in Bazor Server, .NET 5.0, Dapper, SQL SERVER, Radzen Blazor Componet, C #, HTML, Bootstrap.
App in Bazor Server, .NET 5.0, Dapper, SQL SERVER, Radzen
Application in Bazor Server, .NET 5.0, Dapper, SQL SERVER, Radzen Blazor Componet, C #, HTML, Bootstrap.
App in Bazor Server, .NET 5.0, Dapper, SQL SERVER, Radzen
An entity relationship diagram (E-R) was created based on a given statement and then the E-R was converted to a relational model, DIA software was used.
Entity Relationship Diagram (E-R) and Relational Model
An entity relationship diagram (E-R) was created based on a given statement and then the E-R was converted to a relational model, DIA software was used.
Entity Relationship Diagram (E-R) and Relational Model

Reviews

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Showing 1 - 5 out of 41 reviews
Filter reviews by: 1.6
$200.00 USD
Empezó bien y termino muy mal. Poco profesional, infantil, xenófobo y calumniador. se tuvo que resolver por disputa en la plataforma.
PHP Website Design Software Architecture MySQL HTML
P
Flag of Francisco Z. @paolaquiroga
1 month ago
4.8
$30.00 USD
Muy buen trabajo quede muy conforme. Gran profesional, cuento con el para cualquier futuro proyecto.
F
Flag of Francisco R. @franciscorostan6
1 month ago
5.0
$30.00 USD
Es una persona que escucha, atento a los detalles y procura cumplir al 100% con sus servicio profesionales y dentro de periodos establecidos. Cuando hay una comunicacion fluida se alcanzan los objetivos. Gracias.
User Avatar
Flag of Sebastian T. @setoja
1 month ago
5.0
$550.00 USD
Efrain es un fuerte profesional en diseño de base de datos, se establecieron requisitos que se trabajaron en conjunto y el desarrollo del proceso fue rapido y confiable. Bastante comunicativo y entrega a tiempo de lo solicitado. Espero volver a contar con tus servicios profesional y te recomiendo ampliamente a la comunidad.
MySQL Database Administration Database Programming Microsoft SQL Server Database Development
User Avatar
Flag of Sebastian T. @setoja
3 months ago
4.0
$448.14 USD
No conocía la pagina fue genial la experiencia hay que especificar muy bien lo que se quiere, pero seguro vuelvo a utilizar la pagina
PHP Website Design Software Architecture MySQL HTML
User Avatar
Flag of Francisco Q. @rexfquijada
5 months ago

Experience

Backend / DBA / Consultant Adaptapro ERP Open Source

Personal
Jan 2017 - Present
Actualmente trabajo independiente emprendiendo con mi propia empresa de sistemas.

Backend / DBA

TECNOLOGIA ADELFUS, C.A.
Mar 2016 - Aug 2017 (1 year, 5 months)
Database modeling (mysql workbench), database implementation (relational and non-relational, creation of RestFul and Soap services api, use of StrongLoop framework (NodeJS), django (Python), non-SQL data managers: ( MongoDB, Redis) and relational: (Mysql Server, PostgreSQL, and SQL Server) Management of repositories with GIT, use of Scrum methodology (Target Process).

Adaptapro ERP Consultant

Independent
Dec 2014 - Feb 2016 (1 year, 2 months)
Customer Service Provider with ERP Adaptapro. Development, implementation and improvement projects for clients.

Education

Informatics Engineer

Universidad del Zulia, Venezuela 2013 - 2016
(3 years)

Higher University Technician

Universidad del Zulia, Venezuela 2006 - 2009
(3 years)

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Top Skills

MySQL 27 PHP 25 SQL 18 C# Programming 16 HTML 10

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