Julio is available for hire

Julio Szabo

Verified Expert in Engineering

Software Developer

Córdoba, Cordoba, Argentina

Toptal member since March 12, 2013

Expertise

SQL Microsoft Development Agile Development Windows Development C#Hibernate CSS jQuery VB.NET JSON Bootstrap Postman REST API

Bio

Julio is a senior software engineer specializing in Microsoft .NET development with a wealth of experience building web apps in different business areas. He's a flexible and adaptable developer with a great sense of responsibility, and he enjoys working in teams as well as alone. He has worked on-site in companies and, in the last five years, he has been working remotely. His goals, above all, are to achieve personal and professional growth.

Portfolio

Kaplan

C#, .NET, Full-stack, Git, CI/CD Pipelines, Angular, Azure, MySQL Server...

ContractPodAi

.NET, ASP.NET Web Forms, Microsoft Visual Studio, ASP.NET...

Gwentaa, LLC

C#, Visual Studio, JSON, ASP.NET Web Forms, REST APIs, Blazor

Experience

ASP.NET - 12 years
SQL - 12 years
JavaScript - 10 years
C# - 10 years
LINQ - 8 years
NHibernate - 7 years
ASP.NET MVC 3 - 5 years
ASP.NET Web API - 3 years

Availability

Part-time

Preferred Environment

Agile Software Development, Windows, Visual Studio

The most amazing...

...achievement I've had is working as a technical lead, building software to manage quality control with all the best programming practices.

Work Experience

Full-stack Developer

2021 - 2023

Kaplan

Worked on multiplatform applications based on microservices built on .NET Framework with SQL and NoSQL databases in a distributed team worldwide.
Worked on a financial system, adding new functionalities and fixing issues related to credits/debits and payments for small and big accounts.
Improved and adapted existing microservice of shipping and tax calculations for external orders.
Worked on a web application for order processing and product selling, adding new functionalities and fixing issues.

Technologies: C#, .NET, Full-stack, Git, CI/CD Pipelines, Angular, Azure, MySQL Server, Jenkins, Web API, ASP.NET Web Forms, Microservices, Jira, Salesforce Sales Cloud, Agile Sprints, Scrum, Entity Framework, RabbitMQ, Swagger, AutoMapper, Integration Testing, Unit Testing, Microsoft Visual Studio, SQL, SQL Server Management Studio (SSMS), T-SQL (Transact-SQL), LINQ, ASP.NET MVC 3, Bootstrap, ASP.NET Web API, GitHub, AngularJS, HTML5, Microsoft SQL Server, REST APIs, CSS3, Object-oriented Programming (OOP), Model View Controller (MVC), Postman

.NET Engineer

2021 - 2021

ContractPodAi

Developed new functionalities in the users' module on an existing application.
Worked on the existing platform, adding new functionalities and fixing existing issues.
Worked on email assignments for user functionality.

Technologies: .NET, ASP.NET Web Forms, Microsoft Visual Studio, ASP.NET, SQL Server Management Studio (SSMS), T-SQL (Transact-SQL), LINQ, NHibernate, ASP.NET MVC 3, Bootstrap, GitHub, HTML5, Microsoft SQL Server, CSS3, Object-oriented Programming (OOP), Model View Controller (MVC)

Full-stack C# Developer

2020 - 2021

Gwentaa, LLC

Converted proptotypes from InVision to real screens in Blazor, a .NET front-end web framework.
Built a Blazor application from design with Telerik controls.
Added unit test modules for background processes in a .NET app.

Technologies: C#, Visual Studio, JSON, ASP.NET Web Forms, REST APIs, Blazor

Senior Full-stack Developer

2020 - 2020

BenefitEd

Redesigned an existing application and added a new feature allowing companies multiple programs. Added new pages and a model and table to manage new entities in the application.
Worked on a vast database migration script to support multiple programs' new features. The database used the SQL server stored in AWS.
Worked on adapting the existing enrollment process for employees to the new model with multiple programs. The front-end app was developed in Angular 2.

Technologies: Amazon Web Services (AWS), Scrum, Agile, Git, jQuery, Web API, REST, Backbone.js, Angular, C#, ADO.NET, Microsoft Visual Studio, SQL Server Management Studio (SSMS), T-SQL (Transact-SQL), LINQ, ASP.NET MVC 3, ASP.NET Web API, HTML5, Microsoft SQL Server, REST APIs, CSS3, Object-oriented Programming (OOP), Model View Controller (MVC)

Back-end Software Engineer

2017 - 2020

VMBC - Emerios

Built a service layer to process big data information and a PDF process generator.
Built a 3rd-party validation process for new clients in the energy industry.
Implemented PostGIS to handle geolocation functionality for street agents.
Worked on new order creation via a REST API integrated with partners' APIs and applying custom rules.
Imported a big data spreadsheet to SQL and PostgreSQL for new leads.
Integrated with Lexis Nexis to make customer validations.
Implemented new features for the API to manage customers' business logic for a multi-tenant application, fixed issues, and updated behaviors.
Worked with a multi-tenant database with the SQL server row-level security and wrote long and complex stored procedures.

Technologies: Angular, NHibernate, Web API, C#, Microsoft Visual Studio, SQL, ASP.NET, SQL Server Management Studio (SSMS), T-SQL (Transact-SQL), LINQ, ASP.NET MVC 3, Bootstrap, ASP.NET Web API, GitHub, PostgreSQL, AngularJS, HTML5, Microsoft SQL Server, REST APIs, CSS3, Object-oriented Programming (OOP), Model View Controller (MVC), Postman

Full-stack Developer

2017 - 2017

Raamp, LLC

Developed new features for a web application dedicated to providing assistance and organization for companies and property owners who want to rent them.
Implemented a complete change history module for the web app.
Worked with complex financial calculations, like checks, payments, bills, or credit.

Technologies: Active Server Pages (ASP), Azure, Microsoft SQL Server, JavaScript, ASP.NET MVC, Microsoft Visual Studio, SQL, SQL Server Management Studio (SSMS), T-SQL (Transact-SQL), LINQ, ASP.NET MVC 3, Bootstrap, ASP.NET Web API, AngularJS, HTML5, CSS3, Object-oriented Programming (OOP), Model View Controller (MVC), Postman, FontAwesome, Azure Blobs, TFS, MySQL

Full-stack Developer

2017 - 2017

Syntactical Solutions, LLC

Developed new features for an existing web application.
Migrated the app from old ASP pages MVC Razor Views.
Worked on the existing platform and fixed bad behaviors.
Implemented full logic to upload large files, splitting them into 1 MB parts.

Technologies: Active Server Pages (ASP), Azure, Microsoft SQL Server, JavaScript, ASP.NET MVC, Microsoft Visual Studio, SQL, ASP.NET, SQL Server Management Studio (SSMS), T-SQL (Transact-SQL), LINQ, ASP.NET MVC 3, Bootstrap, ASP.NET Web API, CSS3, Object-oriented Programming (OOP), Model View Controller (MVC), Infragistics, FontAwesome, Azure Blobs, TFS, MySQL

Full-stack Developer

2016 - 2017

Exxon Mobil

Implemented a complete UI design with Bootstrap and jQuery.
Built a web app that gets the user and machine name from the server side.
Worked on a simple application solution for a proof of concept (POC).

Technologies: JavaScript, Microsoft SQL Server, C#, Microsoft Visual Studio, T-SQL (Transact-SQL), ASP.NET MVC 3, Bootstrap, CSS3, Object-oriented Programming (OOP), FontAwesome

Web Developer

2016 - 2016

Reservation Outdoors

Made new functionality for the app built in ASP.NET MVC with Razor and AngularJS.
Fixed bugs of existing functionality in the legacy application.
Designed and implemented new features for the existing application.

Technologies: JavaScript, Microsoft SQL Server, C#, Microsoft Visual Studio, T-SQL (Transact-SQL), ASP.NET MVC 3, CSS3, Object-oriented Programming (OOP)

Full-stack Developer

2014 - 2016

RSI

Fixed bugs in the legacy application built with web forms.
Started building a new app in MVC with Razor as a view engine using the existing DB.
Created new service components for a new app to replace the old logic in the old app.
Implemented a blog inside the IIS site using WordPress running with PHP.
Changed and redesigned big and complex report pages using jQuery and Bootstrap.
Implemented jqGrid and changed all grids in the app.

Technologies: PHP, Microsoft SQL Server, JavaScript, C#, Microsoft Visual Studio, SQL, T-SQL (Transact-SQL), LINQ, ASP.NET MVC 3, CSS3, Object-oriented Programming (OOP), Model View Controller (MVC)

Full-stack Developer

2015 - 2015

nimblesoft

Worked on a base project in ASP.NET MVC, adding new functionality and fixing bugs.
Designed and implemented unit and integration tests with nUnit.
Implemented new features on existing legacy applications built in ASP.NET MVC.

Technologies: Microsoft SQL Server, JavaScript, C#, Microsoft Visual Studio, SQL, T-SQL (Transact-SQL), LINQ, ASP.NET MVC 3, Bootstrap, CSS3, Object-oriented Programming (OOP)

Technical Leader | .NET Developer

2010 - 2015

Globant

Developed a web app by migrating from an outdated previous version. Currently under construction in the testing and debugging stage.
Used SQL Server for a web app database engine, NHibernate, and Fluent to manage object-oriented data.
Developed a web app UI with MVC 3.0 and Razor pages, as well as jQuery and Ajax callbacks for interactions to optimize performance.
Led a team of more than 15 engineers and five QA engineers.
Liaised with clients and business analysts, relaying specifications to developers and delivering time estimates.
Developed a set of internal and external references using jQuery popups for the web app UI.
Implemented a general interface to perform app-wide searching for entities.
Performed daily deploys on an internal server for quality control.
Developed an application for a large insurance company to provide insurance quotes online.
Implemented internal security architecture to control access to the insurance company's site using Microsoft Authorization Manager (Azman).

Technologies: Microsoft Team Foundation Server, CSS, Ajax, jQuery, JavaScript, XML, FluentNHibernate, NHibernate, PostSharp, .NET, Spring, Web MVC, C#, Microsoft Visual Studio, SQL, SQL Server Management Studio (SSMS), T-SQL (Transact-SQL), LINQ, ASP.NET MVC 3, ASP.NET Web API, CSS3, Object-oriented Programming (OOP), Infragistics, Model View Presenter (MVP), Aspect-oriented Programming, TFS, jqGrid, MySQL, Reflection, Functional Programming

.NET Full-stack Developer

2014 - 2014

Stacked Sports

Developed a social media oversight platform that enables one admin across many users to view the posts of multiple other users.
Integrated the application with Twitter, Facebook, and Instagram APIs to get users' tweets to find words configured in the app.
Fixed bugs in the UI and back-end side of a legacy application.

Technologies: Instagram API, Facebook API, X (formerly Twitter) API, Microsoft SQL Server, JavaScript, C#, Microsoft Visual Studio, SQL, T-SQL (Transact-SQL), Object-oriented Programming (OOP)

.NET Full-stack Developer

2014 - 2014

General Genetics Corp

Provided design, layout, and code updates to an eCommerce website.
Developed payment methods form for an existing Application.
Handled web deployments for an old Application in IIS.
Fixed bugs on the UI and back end for a legacy application.
Implemented the entire blog inside an IIS site running on PHP with Joomla and another one with WordPress.

Technologies: CSS, HTML, JavaScript, VB.NET, Visual Basic .NET (VB.NET), WordPress, Joomla 3

Senior Developer

2013 - 2014

Confidential Client (via Toptal)

Maintained an application. Developed new features.
Created and designed an MVC API containing all the back-end logic to integrate with the new UI for new app screens.
Created and designed views in the database with loan calculations to integrate with NetTiers model objects.
Analyzed all back-end logic for loan creation and designed and wrote a document.

Technologies: Scrum, JSON, jQuery, C#, ASP.NET, T-SQL (Transact-SQL)

Technical Leader | .NET Developer

2004 - 2010

CTL

Developed a business rules engine with distributed architecture, separating each component with three-tier architecture.
Created a website to manage user profiles and implemented extra applications to automate processes. Utilized a repository of DLLs.
Constructed a solution for quality control to manage versioning of documents and findings.
Involved in the implementation of the application for various customers in Cordoba.
Built code generators to access stored procedures and components as a technical leader, speeding up the development of applications mounted on the business rules engine.
Participated actively in the design and development of process automation with an external tool based on Windows Workflow Foundation.
Worked with office automation with Excel report generation and automatic editing of Word files for a document versioning tool.

Technologies: XSLT, XML, JavaScript, Ajax, Microsoft 365, Microsoft SQL Server, C#, VB.NET, Visual Basic .NET (VB.NET), Visual Basic, Oracle, Microsoft Enterprise Library, Infragistics, Aspect-oriented Programming, TFS, XML/XSLT, InstallShield

Experience

Change History Management for Aspect Application

We used Aspect to interpret changes in the properties of the data model, which allowed us to save changes in the relevant database quickly. To do this in the data model, each class property must be marked with a particular attribute as a parameter that indicates the type of change to be recorded. Then, the Aspect was intercepted at compile time, and an extra behavior was added to each property class to record the changes.

Personal Blog

http://julioszabo.wordpress.com/

I have created a personal blog on a third-party application to show some of my experience in development industries in which I have been working for more than 20 years. I have always worked with Microsoft technologies.

Technical Leadership at Globant

https://www.bsigroup.com/en-GB/our-services/entropy-governance-compliance-risk-grc-software/

I have led a development team for a UK-based company, creating and developing a quality control application to manage their documentation processes. This project involved development tasks and designing and testing the application with product owners who approved or rejected changes and features.

Education

2014 - 2014

Master Degree in Javascript

https://www.codeschool.com/users/julioszabo - Online

1997 - 2009

Engineering Degree in Information Systems

National Technological University - Cordoba, Argentina

2007 - 2007

Project Manager with PMI Methodologies Degree in Management

Scarpatti & Asociados - Cordoba, Argentina

Skills

Libraries/APIs

Entity Framework, REST APIs, LINQ, jQuery, Infragistics, FluentNHibernate, X (formerly Twitter) API, Facebook API, Instagram API, Web API, Backbone.js, Microsoft Enterprise Library, AutoMapper

Tools

Postman, Microsoft Visual Studio, GitHub, Jira, jqGrid, TFS, PostSharp, Microsoft Team Foundation Server, Visual Studio, Git, InstallShield, Jenkins, Salesforce Sales Cloud, RabbitMQ

Languages

Visual Basic .NET (VB.NET), CSS3, SQL, CSS, C#, T-SQL (Transact-SQL), JavaScript, Active Server Pages (ASP), XML/XSLT, HTML5, Visual Basic, HTML, VB.NET, XML, XSLT, PHP

Frameworks

ASP.NET MVC, ASP.NET Web API, .NET, ASP.NET MVC 3, Bootstrap, ADO.NET, NHibernate, ASP.NET, Angular, AngularJS, Spring, Razor Pages, ASP.NET Web Forms, Swagger, Blazor

Paradigms

Agile Software Development, Object-oriented Programming (OOP), Model View Presenter (MVP), Model View Controller (MVC), Functional Programming, Scrum, Aspect-oriented Programming, REST, Agile, Microservices, Unit Testing

Platforms

Windows, Azure, Joomla 3, Amazon Web Services (AWS), WordPress, Oracle

Storage

SQL Server Management Studio (SSMS), JSON, MySQL, PostgreSQL, Azure Blobs, Microsoft SQL Server, MySQL Server

Other

Microsoft 365, FontAwesome, Reflection, Ajax, Web MVC, Full-stack, CI/CD Pipelines, Agile Sprints, Integration Testing, Data Modeling

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.

Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring