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$40 USD / hour
Flag of PERU
lima, peru
$40 USD / hour
It's currently 12:49 PM here
Joined June 22, 2015
4 Recommendations

Sergio A.

@SergioAlfaroV

annual-level-three.svg
verified.svg
preferred-freelancer-v2.svg 4.9 (31 reviews)
6.1
6.1
100%
100%
$40 USD / hour
Flag of PERU
lima, peru
$40 USD / hour
97%
Jobs Completed
97%
On Budget
86%
On Time
13%
Repeat Hire Rate

Microsoft Certified Data Solutions Expert, MBA

15+ years of experience in Data Engineering, BI, SQL, reports/dashboards design and construction, ETL/ELT, Data Warehousing, Data Analytics, database administration/tuning/optimization, and related work. 7+ years of experience working remotely on project all around the world. Native Spanish speaker, and near-native English speaker, located in the American Central Timezone (GMT -05). Ideal for near-shore projects requiring constant communication during office hours. TECH STACK =========== MS SQL SERVER: - Transact-SQL - Administration - Tuning MS SQL SERVER BI ON PREM STACK: - Power BI: DAX, M - Reporting Services - Analysis Services: Tabular (DAX), OLAP(MDX) - Integration Services AZURE CLOUD DATA STACK: - Azure Data Factory - Synapse - Databricks - Data Lake SCRIPTING: - Python - VB.NET - C# - PowerShell OTHERS: - Snowflake - MS Excel: Formulas, VBA (Macros) - QlikView - Tableau - Oracle (PL/SQL) - MySQL - PostgreSQL - UNIX - XML - YML - JSON - Git - SCRUM ** Adjustable rates according to work complexity, urgency, and/or project size. **
Freelancer SQL Developers Peru
See all SQL Developers in Peru

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Portfolio

8385491
This is a Time Tracker Application to be used by supervisor of a wood processing plant to register labor and duration per employee, work order, machine and type of task.
Time Tracker App (VB.Net + SQL)
This is a Time Tracker Application to be used by supervisor of a wood processing plant to register labor and duration per employee, work order, machine and type of task.
Time Tracker App (VB.Net + SQL)
7273365
This is an app for the user to import PDF filled forms to SQL Server. The main importing logic was written on the SQL procedure, while other validation rules was coded on the VB.NET app. The core functionality detected the fillable fields on the PDF file and converted their contents to a XML file. Then, the XML data structure is pulled to a table in SQL Server.
App to import PDF forms (VB.NET+SQL)
This is an app for the user to import PDF filled forms to SQL Server. The main importing logic was written on the SQL procedure, while other validation rules was coded on the VB.NET app. The core functionality detected the fillable fields on the PDF file and converted their contents to a XML file. Then, the XML data structure is pulled to a table in SQL Server.
App to import PDF forms (VB.NET+SQL)
7272976
This is a suicide prevalence world wide map per Country that I made using Power BI. I used the Filled Map visual that pulls the world wide map from Bing, suicide prevalence data from the WHO, and Country ISO codes (2 and 3 letters) and names from a Wikipedia page.
Suicide prevalence map per Country
7272697
This is my MCSE (Microsoft Certified Solutions Expert) Data Management and Analytics Certificate, obtained in November 2019.
MCSE Data Mgmt and Analytics Certif
6453114
This is a Traffic Incidents Dashboard I made using Power BI and SQL Server. I built the SQL database from scratch based on a series of data sources, flat files and APIs, and also the Power BI dashboard.
Power BI Traffic Incidents Dashboard
This is a Traffic Incidents Dashboard I made using Power BI and SQL Server. I built the SQL database from scratch based on a series of data sources, flat files and APIs, and also the Power BI dashboard.
Power BI Traffic Incidents Dashboard
This is a Traffic Incidents Dashboard I made using Power BI and SQL Server. I built the SQL database from scratch based on a series of data sources, flat files and APIs, and also the Power BI dashboard.
Power BI Traffic Incidents Dashboard
This is a Traffic Incidents Dashboard I made using Power BI and SQL Server. I built the SQL database from scratch based on a series of data sources, flat files and APIs, and also the Power BI dashboard.
Power BI Traffic Incidents Dashboard
This is a Traffic Incidents Dashboard I made using Power BI and SQL Server. I built the SQL database from scratch based on a series of data sources, flat files and APIs, and also the Power BI dashboard.
Power BI Traffic Incidents Dashboard
5898774
This is a T-SQL Create Database Trigger to auto-create User Based on Login, which is basically a server level trigger that executes when a database is created. What it does is create a user within the newly created database, based on a previously created login, grant needed permissions, and associate with the mentioned login. Also the trigger does this for all the databases where this user hasn't been created before.
T-SQL Complex Server Level Trigger
8385491
This is a Time Tracker Application to be used by supervisor of a wood processing plant to register labor and duration per employee, work order, machine and type of task.
Time Tracker App (VB.Net + SQL)
This is a Time Tracker Application to be used by supervisor of a wood processing plant to register labor and duration per employee, work order, machine and type of task.
Time Tracker App (VB.Net + SQL)
7273365
This is an app for the user to import PDF filled forms to SQL Server. The main importing logic was written on the SQL procedure, while other validation rules was coded on the VB.NET app. The core functionality detected the fillable fields on the PDF file and converted their contents to a XML file. Then, the XML data structure is pulled to a table in SQL Server.
App to import PDF forms (VB.NET+SQL)
This is an app for the user to import PDF filled forms to SQL Server. The main importing logic was written on the SQL procedure, while other validation rules was coded on the VB.NET app. The core functionality detected the fillable fields on the PDF file and converted their contents to a XML file. Then, the XML data structure is pulled to a table in SQL Server.
App to import PDF forms (VB.NET+SQL)
7272976
This is a suicide prevalence world wide map per Country that I made using Power BI. I used the Filled Map visual that pulls the world wide map from Bing, suicide prevalence data from the WHO, and Country ISO codes (2 and 3 letters) and names from a Wikipedia page.
Suicide prevalence map per Country
7272697
This is my MCSE (Microsoft Certified Solutions Expert) Data Management and Analytics Certificate, obtained in November 2019.
MCSE Data Mgmt and Analytics Certif
6453114
This is a Traffic Incidents Dashboard I made using Power BI and SQL Server. I built the SQL database from scratch based on a series of data sources, flat files and APIs, and also the Power BI dashboard.
Power BI Traffic Incidents Dashboard
This is a Traffic Incidents Dashboard I made using Power BI and SQL Server. I built the SQL database from scratch based on a series of data sources, flat files and APIs, and also the Power BI dashboard.
Power BI Traffic Incidents Dashboard
This is a Traffic Incidents Dashboard I made using Power BI and SQL Server. I built the SQL database from scratch based on a series of data sources, flat files and APIs, and also the Power BI dashboard.
Power BI Traffic Incidents Dashboard
This is a Traffic Incidents Dashboard I made using Power BI and SQL Server. I built the SQL database from scratch based on a series of data sources, flat files and APIs, and also the Power BI dashboard.
Power BI Traffic Incidents Dashboard
This is a Traffic Incidents Dashboard I made using Power BI and SQL Server. I built the SQL database from scratch based on a series of data sources, flat files and APIs, and also the Power BI dashboard.
Power BI Traffic Incidents Dashboard
5898774
This is a T-SQL Create Database Trigger to auto-create User Based on Login, which is basically a server level trigger that executes when a database is created. What it does is create a user within the newly created database, based on a previously created login, grant needed permissions, and associate with the mentioned login. Also the trigger does this for all the databases where this user hasn't been created before.
T-SQL Complex Server Level Trigger

Reviews

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Showing 1 - 5 out of 31 reviews
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5.0
£50.00 GBP
DTSX Package.
A true pro. Really new his stuff. Very quick.
SQL
Microsoft SQL Server
SSIS (SQL Server Integration Services)
S
Flag of Richard L.
@Slixter
•
10 months ago
5.0
$2,650.00 USD
SQL Programmer/Data Warehouse Cube
Wonderful communication and work -
SQL
Oracle
Database Administration
Database Programming
Microsoft SQL Server
N
Flag of Dominick B.
@nbarbarise2020
•
3 years ago
5.0
$50.00 USD
Crear presentación de Power Bi - Fecha límite 14/08
Sergio cumplió con mis expectativas. Estubo muy atento, enviandome en todo momento los avances de mi proyecto. Gran comprensión de las consignas y feedback. Lo recomiendo y seguramente volveré a solicitar sus servicios!!! Muchas Gracias Sergio!!
Presentations
Big Data Sales
T-SQL (Transact Structures Query Language)
Power BI
User Avatar
Flag of Julieta Marina F.
@AromasMgZN
•
4 years ago
5.0
$300.00 USD
Rolling Balance Sheet Power BI
Performed work very quickly, very easy to work with.
Power BI
T
Flag of Tom C.
@tcasekpi
•
4 years ago
5.0
$50.00 USD
Project 26553040 has been deleted
i liked very much to work with him
I
Flag of Ilan T.
@ilantep
•
4 years ago

Experience

Viewpoint/SSRS Specialist

BairesDev | Client: Kimbel Mechanical Systems
Apr 2016 - Present
Telecommuting (home/office) work. Design and development of accounting and financial reports, using Viewpoint ERP, SQL Server 2014 (T-SQL) and SSRS. Work entirely in English (since the client is based in Arkansas, USA). Major Projects:  - Daily Dashboard (with daily indicators, for the CEO) - Profit and Loss: Cost of Construction (for the CFO) - Monthly Reports (battery of monthly reports, for several users) - Daily Invoices (daily subscription - invoices w/attachments, for several users)

Qlikview Specialist

Cerámica San Lorenzo
Jan 2013 - Present
Long time on-demand freelancer - with approximately 500 work hours through more than 4 years. Analysis, design, development and implementation of Sales, Logistics and Marketing dashboards (customer segmentation matrix) using SQL Server and Qlikview.

Business Intelligence Consultant

MDP Consulting | Client: Ferreyros
Jan 2016 - Sep 2016 (8 months, 1 day)
• Requirement identification, development and deployment of Fill Rate Indicators Datamart, for Logistics and Grand Mining (AS/400, SQL Server (T-SQL), DataStage, Cognos). • Improvements in Audit/FIU reports (Cognos). • Financial Consolidation project (MS Excel, , SSIS, T-SQL).

Education

Business Internationalization Course, ICEX

Spain 2015
(Less than a year)

MBA

Universidad ESAN , Peru 2013 - 2015
(2 years)

Business Intelligence and Strategic Information Management

Universidad Peruana de Ciencias Aplicadas, Peru 2012
(Less than a year)

Qualifications

MCSE: Microsoft Certified Solutions Expert: Data Management and Analytics

Microsoft
2019
MCSE: Microsoft Certified Solutions Expert: Data Management and Analytics

First Certificate in English

University of Cambridge
2011
Certificate that accredits proficiency on English language: reading, writing, speaking and listening.

MCSA: Microsoft Certified Solutions Associate: SQL Server 2014

Microsoft
2017
This certificate proves my knowledge and proficiency on Microsoft SQL Server 2014.

Contact Sergio A. about your job

Log in to discuss any details over chat.

Verifications

Preferred Freelancer
Identity Verified
Payment Verified
Phone Verified
Email Verified
Facebook Connected

Certifications

span-eng.png Spanish to English Translation 1 97%
us_eng_1.png US English 1 95%
SQL_1.png SQL 1 92%
preferredfreelancer-1.png Preferred Freelancer Program SLA 1 92%
oraclesql-1.png OracleSQL 1 90%

Top Skills

SQL 27
Microsoft SQL Server 23
Excel 16
Database Administration 9
Business Analysis 8

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