Yaison is available for hire

Yaison Alcantara

Verified Expert in Engineering

Back-end Development Developer

Location

Santo Domingo, Distrito Nacional, Dominican Republic

Toptal Member Since

May 4, 2021

Yaison is a Java developer with 10+ years of experience coding web-based applications. He's experienced in the full software development life cycle: development, coding, testing, implementation, and deployment. He is able to get hands-on with SQL databases, front-end development, and legacy systems as well. Yaison excels in multicultural environments with team members around the world.

Back-end Development RESTful Web Services Java Hibernate Spring Oracle SQL MySQL Linux Amazon Web Services (AWS)React MongoDB Docker Software Engineering Web Services

Portfolio

GBH Solutions

Java, Spring, MySQL, REST, HTML, Amazon Web Services (AWS), Cloud, Web Services...

Indra

Java, Spring, Oracle, HTML, REST, Web Services, RESTful Web Services

Verizon

Back-end Development, Java, Oracle, Web, Web Services, HTML, REST, SOAP

Experience

Back-end Development - 11 years Java - 11 years RESTful Web Services - 7 years HTML - 6 years SQL - 5 years Linux - 4 years JavaScript - 4 years Amazon Web Services (AWS) - 3 years

Availability

Part-time

Preferred Environment

Linux, Slack, Outlook, Visual Studio Code (VS Code), Java, SQL, HTML, Cloud, REST, Web

The most amazing...

...bug I've fixed was in Oracle's WebLogic application server that prevented the entire team's app to load. A few months later, Oracle submitted an official patch.

Work Experience

Senior Software Engineer III

2019 - PRESENT

GBH Solutions

Implemented an internal search engine capable of delivering full-text search queries in the sub <1 second response time.
Dramatically optimized the application performance from a 5-second average to sub <1 second.
Migrated legacy Java code to modern Java 11 with Spring Boot.

Technologies: Java, Spring, MySQL, REST, HTML, Amazon Web Services (AWS), Cloud, Web Services, Back-end Development

Senior Software Engineer

2018 - 2019

Indra

Developed concurrent request processing for faster user data retrieval in an Android application.
Migrated successfully part of C code into modern Java and provided the service with a REST endpoint.
Created important business components and logic for the strategic planning and provision of the government-managed electrical grid.

Technologies: Java, Spring, Oracle, HTML, REST, Web Services, RESTful Web Services

Senior Software Engineer

2010 - 2017

Verizon

Developed a multi-server and multi-app configuration system way before the word cloud was popular. It helped save many hours in configuring and storing per-app settings needed in every project.
Implemented a messaging system when the team was constrained by infrastructure technical decisions. It helped deliver asynchronous messages and storage for quality of service between endpoints.
Created a batch processing system that took on excel spreadsheets, uploaded by the user, which processed row by row and inserted the data in the database.

Technologies: Back-end Development, Java, Oracle, Web, Web Services, HTML, REST, SOAP

Experience

Carmarket Crawler

An application that tracks the market data of posted car ads and does statistical analysis on it. It crawls the web for different local sites which publish car data and prices. On top of that, a database is built for later heavy query usage. Then, in-depth car reports and visualization are being generated for end users.

Skills

Languages

Java, SQL, JavaScript, HTML

Frameworks

Hibernate, Spring

Other

RESTful Web Services, Back-end Development, Software Engineering, Information Systems, Web Services, SOAP, Cloud

Platforms

Oracle, Linux, Amazon Web Services (AWS), Docker, Web

Storage

MySQL, MongoDB, Databases, JSON

Libraries/APIs

React, Node.js

Paradigms

REST

Education

2007 - 2012

Bachelor's Degree in Computer Systems Engineering

Instituto Tecnológico de Santo Domingo - Santo Domingo, Dominican Republic

Certifications

APRIL 2015 - PRESENT

Oracle Certified Professional, Java SE 6 Programmer

Oracle

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