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Ariel O.
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Ariel O.

Full Stack & AI Engineer, Fintech Expert | Ex-Mastercard Engineer Team

✅ I perfectly realize my clients' visions. 🔝 As a talent equipped with top-tier skills and 🎩outstanding business acumen, I turn clients' visions into success. Poised to become a Software Engineer/Applications Developer in the company specializing in JAVA/J2EE(Full Stack or Backend). A Highly Talented Professional with over 14 years of experiences(12 years in Java/J2EE and 2 years in .NET). A Senior Software Engineer with some Lead Experiences in the domain of Finance, Telecommunications, State Jobs, etc. Summary of Qualifications: • HTML, HTML 5, CSS, CSS 3, JavaScript, jQuery, Ajax, XML, XSLT, Json, Dojo, Angular, Bootstrap, • React/React JS. • 14 years of solid experiences in Web Applications Technologies • 12 years of solid experiences in Core Java • 12 years of solid experiences in Java EE Technologies (STRUTS, SPRING, HIBERNATE, JSF, EJB, JPA, • EAD 4J/Jade) and spring boot Microservices • Experience in Shell Scripting and Perl Programming • Experience in JavaScript Frameworks like Angular/Angular JS, React/ReactJs and jQuery • Experience in Jenkins, Splunk • Experience in Windows, Linux, Unix and MacOS Operating Systems • Experience in Linux and Shell Scripting • Software Design and Architecting Skills • Experience JMS queue/topic, RabbitMQ and Kafka. • Strong experience of Analysis and Design of Databases (Entity Relationship Diagram) • Strong experience of Object-Oriented Analysis and Design (UML) • Strong experience in Agile Process Model • Repositories like TFS, RTC, git, unfuddle, SVN, bitbucket • Excellent verbal and written communication skills, with the ability to articulate complex ideas clearly and concisely to both technical and non-technical stakeholders. • Strong analytical and problem-solving abilities, with a focus on improving processes to accelerate delivery, foster innovation, reduce costs, and improve quality. • Japan Information Technology Standard Examination Certified Technical Skills: • View Technologies: Face lets, jsp, Angular(Typescript), React/ReactJs(JSX, Typescript), HTML, CSS, • Javascript, Bootstrap, etc • Object Relational Mapping (ORM): JPA and Hibernate • Programming Languages: Java, C#, Typescript, Groovy • Operating Systems: Linux, Windows, Unix, MacOS • Web Service: REST, SOAP, RESTful Microservices • Cloud Platforms: AWS, Windows Azure, PCF, GCP • Monitoring Tools: Dynatrace, Datadog, splunk, etc • Security: Spring Security, Certificates, SSL, LDAP • Batch Jobs: Spring Batch, Multithreading • Unit Testing Frameworks: Junit, Testng, PowerMock, Groovy Spock, Mockito, Jest, Vitest, etc • Application Servers: Glassfish, WebSphere and Tomcat • Integrated Development Environment (IDE): NetBeans, STS, RAD, RSA, intellij • Database Management Systems: MS SQL Server, DB2, Oracle, Mongo DB, Postgre SQL • CI/CD: jenkins, maven, gradle • Others: insomia, postman, jmeter, Docker, Kubernetes, swagger, RabbitMQ, Kafka, etc.

🇺🇸Creve Coeur, United States$75/hr100% JSS5.00 (3)Since Dec 2023

Earnings and projects

MRR
$1.4k

Last 6 months ÷ 5.2 months active (since Jun 2026)

World#35,166 / 412k
🇺🇸Country#6,577 / 62.1k
Revenue, last 30 days
$0

Last 6 months: $7.2k

Total earnings
$7.3k

Billed in all: $7.6k

World#223,139 / 412k
🇺🇸Country#35,413 / 62.1k
Per project
$1.5k

$1.4k in the last 6 months

World#97,195 / 412k
🇺🇸Country#16,519 / 62.1k
Projects, last 6 months
5
40% fixed60% hourly
World#41,746 / 412k
🇺🇸Country#5,872 / 62.1k
Projects in all
5
40% fixed60% hourly
World#266,042 / 412k
🇺🇸Country#38,088 / 62.1k

Earnings, last 30 days

$7.6kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$6k$7k$8k$9kOct 8Oct 23Nov 7

Skill rankings: Top 8% in Java

Ranked by MRR among everyone on Upwork with the skill.

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  6. #197Spring Boot2,150 freelancers · 🇺🇸 #11Top 9%
  7. #292MERN Stack3,086 freelancers · 🇺🇸 #23Top 9%
  8. #339.NET Framework2,944 freelancers · 🇺🇸 #50Top 12%