Nicolas Charczewski
Verified Expert in Engineering
Software Developer
Rosario, Santa Fe, Argentina
Toptal member since December 19, 2016
Nicolas is a full-stack computer engineer with solid background on secure, fast and scalable Java web applications. He has the ability to research, learn, and consult on new frameworks and technologies. His experience as technical leader allowed him to improve his communication skill, making him an excellent option for decision support. More than fifteen years of experience let makes him adaptable and able to handle any challenge.
Portfolio
Experience
- Java - 10 years
- Spring - 10 years
- SQL - 10 years
- PrimeFaces - 3 years
- JProfiler - 3 years
- Bootstrap - 3 years
- JSF - 3 years
- Angular - 1 year
Availability
Preferred Environment
Oracle, Angular, Java 8, Git, IntelliJ IDEA
The most amazing...
...application I’ve coded was related to healthcare and biometric devices, allowing me to build something that improves people's lives.
Work Experience
Senior Technical Leader
NaviHealth
- Led technical projects for Curaspan.
- Developed software in an Agile environment.
Angular 2 Developer
Speerit.co
- Supported solutions for existing issues with a front-end project developed in Angular 2 using HTML5 and CSS3.
- Solved cross-browser issues in IE, Firefox, Chrome, and Safari.
- Used Git and IntelliJ for the IDE.
- Used VWO for A/B testing.
- Worked with most popular analysis websites for code optimization.
Angular 4 and Java Developer
ActitudRosario
- Created an entire website for back-end management of an eCommerce business.
- Created the administration site using Angular 4 and Java on the back-end with MySQL.
- Developed web scraping from multiple eCommerce sites (Amazon, Victoria's Secret, Carter's, GAP, Gymboree, etc.).
- Built image processing and conversion (adding water-marks, size, resolution, etc.).
- Converted product sizes for multiple countries.
- Tuned PROD builds using Gulp.
Senior Architect
Santa Fe Goverment
- Built an entire application framework for the Government of Santa Fe, based on EJB3/JPA2 and JSF2 (Primefaces).
- Built documentation standards for architecture, design, and configuration documents.
Senior Architect
DirecTV
- Developed new ETL processes using IBM DataStage.
- Evaluated and fixed bugs in existing processes.
- Built sequence and performance improvements.
- Provided project management support.
- Provided risk management.
Senior Architect
Frávega
- Supported system analysts during inception and core process analysis.
- Made an enterprise architecture proposal.
- Developed device interfaces (electronic payment, ticket printers, barcode scanners, etc.).
- Distributed synchronization.
Senior Architect
Ledesma
- Initiated new processes and technologies within the company.
- Defined enterprise architecture.
- Made presentations to the client on topics like including architecture, operating models, etc.
Technical Leader
Bank of Chile
- Coordinated a highly distributed team.
- Managed projects.
- Developed complex components.
Technical Leader and Senior Developer
Lowes.com
- Coordinated a high distributed team (four cities in Argentina and one city in the USA).
- Managed projects (staffing, planning, task assignation and monitoring, strategy, etc.).
- Led technical projects (architecture, design, estimations, complex functionalities development, etc.).
- Contributed to risk management.
- Communicated with the client and project managers in the USA.
Senior Developer
Jahia Community
- Developed and integrated a very flexible logging module, paying special attention in performance relative matters. Besides this development, a statistics module was developed for Jahia5 as an example of the logging module.
- Developed and adhered to object-oriented design.
- Wrote documentation.
- Created SVN patches.
Senior Developer
OSDE
- Worked within a distributed team (four cities in Argentina).
- Designed, made estimations, and developed in Java.
- Communicated directly with the client.
Software Analyst Level III
Central Bank of Uruguay
- Consulted on Tender customer support and advised the directors.
- Created contingency plans.
- Migrated systems.
- Created specification, design, and UML documentation.
Software Analyst at SIIF Project
Ministry of Economy of Uruguay
- Analyzed, designed, and developed using ORACLE 8i tools.
- Gathered specifications.
- Generated modules using Oracle Designer.
- Developed stored procedures, triggers, and libraries using PL/SQL.
- Provided user support on application usage.
- Coordinated projects.
- Developed Java applets.
- Developed servlets in JSP and Core Java.
- Developed in PHP, C/C++/Pro-C, and VB.
- Designed websites.
Experience
Speerit.co
Lowes.com
Education
Degree in Software Engineering (Systems Engineering and Analysis)
Republic University - Montevideo, Uruguay
Skills
Libraries/APIs
Spring REST, jQuery, JPA 2, JasperReports, JAX-WS, JAX-RS, Axis
Tools
Apache JMeter, JProfiler, Eclipse IDE, IntelliJ IDEA, Git, Cucumber, SonarQube, Checkstyle, XDoclet, Jenkins, Apache Maven, IBM InfoSphere (DataStage), Jahia, Servlet, Hotjar, Adobe Photoshop
Languages
Java, SQL, Bash Script, Java 8, Bash, COBOL, C, Batch, UML, Visual Basic, HTML5, CSS3, C++, PHP
Frameworks
Spring Security, Spring ORM, Spring, JSF, Angular, AngularJS, Rational Unified Process (RUP), PrimeFaces, JUnit, Jasmine, CXF, Selenium, Spring 4, Hibernate, Apache Velocity, Swing, Apache Struts, GWT, Jakarta Server Pages (JSP), Bootstrap
Storage
Spring Data, Elasticsearch, PostgreSQL, PL/SQL, MySQL, IBM Informix, IBM Db2, MongoDB, Sybase, Spring Data MongoDB
Paradigms
REST, Agile, ETL, Service-oriented Architecture (SOA)
Platforms
Oracle, Amazon Web Services (AWS), Android, Linux, Windows, Debian, JBoss, Jakarta EE, Endeca, VWO
Other
EJB 3, FindBugs, EJB3, Validation, GlassFish, Enterprise Java Beans (EJB), Web Services, IBM Commerce, AppPerfect, Data Warehousing, Tools, Forms, Reports, Data Warehouse Design
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