Ivan Sierra
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Ivan Sierra

Ivan Sierra

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Detail

Software Developer
La Plata, Buenos Aires Province, Argentina

Contact Ivan regarding: 

work
Full-time jobs
Starting at USD44K/year
Flexible work
Starting at USD25/hour

Timeline

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Résumé

Jobs verified_user 0% verified
  • S
    Sr. Fullstack Developer
    SysAdmin
    Feb 2025
  • S
    Sr. Desktop developer
    Signaris Inc.
    Jan 2024 - Jan 2025 (1 year 1 month)
    • Fixing bugs. • Updating SQL queries in T-SQL. • Adding new fields to old WinForms formularies. • Developing new forms with Microsoft Reporting Services. • Follow the protocol and administrative procedures. • Avoid asking questions about strange old code, or changing it. • Try to maintain performance whenever posible in order to make flawless transactions.
  • S
    Sr. Desktop Developer
    Signaris Inc.
    Jan 2024 - Jan 2025 (1 year 1 month)
  • K
    Ssr. Full-stack developer
    Klimber
    Jan 2023 - Jan 2024 (1 year 1 month)
    • Developing cross-country features, that were dependencies for other modules. • Designing web UI in razor pages with jQuery for the use of clients and operators, prioritizing UX and taking care of the UI design. • Writing high-performance code for processing millions of policies using OOP principles. • Maintaining accessibility between different languages (ES, BR, EN…), using string source files to avoid language-locking situations. - Authentication and Authorization by roles. • Developing MVC APIs to be consumed by a MVC Razor Pages Frontend. • Leveraging co-workers by discussing new C# features, peer programming, assisting new developers to get comfortable with the codebase and the database, being part of discussions about the futu
  • K
    Ssr. Fullstack Developer
    Klimber
    Jan 2023 - Jan 2024 (1 year 1 month)
  • S
    Ssr. Backend developer
    Sofre Digital
    Jan 2022 - Jan 2023 (1 year 1 month)
    • Creating interfaces for integrate third-party data sources through REST APIs, like a History Database that contained records about the oil and gas production. • Creating endpoints that would be consumed by a React frontend, developing all the business logic in order to allow easy understanding of data, statistics and allowing the users to verify or deny the validity of the shown information. • Accessing and parsing old data from an Oracle 10g database in order to import that data in the new software. • Following Agile good practices, like having dailies, retrospectives and having an updated report about advances in the development. • Applying OOP principles and refactoring code, trying to keep everything tidy and clean, separating co
  • S
    Ssr. Backend Developer
    Sofre Digital S.A.
    Jan 2022 - Jan 2023 (1 year 1 month)
  • C
    SysAdmin – Sr. Full-stack Developer
    Centro Diagnóstico Mon
    Jan 2014 - Jan 2022 (8 years 1 month)
    I worked there as a SysAdmin (network architecture and management, pc support…) and as a Sr. Full-Stack Developer programming tools, from the Technical Analysis to the Deploy in production. My tasks as a developer were: • Reviewing which tasks could be automatized, like replacing old behaviors like writing in paper and carrying bulks of documents from one site to another, or old software that needed manual intervention. • Technical analysis of the product needed, taking down notes about what the employees needed to achieve their goals, and thinking the optimal solution while taking care of not being too much disruptive and being more modern at the same time. • Choosing a stack of technologies, some tasks required really fast input and we
  • I
    SysAdmin – Jr. Desktop Developer
    Innovo - Tecnologías de la información
    Jan 2011 - Jan 2013 (2 years 1 month)
    • Understanding the requirements to get the most effective approach, reiterating from MVP through versions to get the closest to the clients needs. • Designing databases in PostgreSQL with pg/pl-SQL, thinking the best and optimal patterns to avoid getting redundant data or low performance solutions, creating tables, relations and Stored Procedures. • Programming the business logic in C# 4.0, the state-of-the-art version of the language at that moment, using Threads and Background Workers to perform asynchronous tasks. • Composing the GUI with WinForms, trying to use every tool in the platform like panels, wrappers, splitters, pictures embedded in treelistviews, and others, to get the best UX. Used technologies: C#, WinForms, pg/pl-SQL,
  • I
    Jr. Desktop Developer
    Innovo - Tecnologías de la información
    Jan 2011 - Jan 2013 (2 years 1 month)
Education verified_user 0% verified
  • U
    Bell Degree in Humanities
    Universidad Tecnológica Nacional Systems Engineering
Projects verified_user 0% verified
  • i
    Thefarmingdata.com
    izzitech
    Jan 2025 - Current (6 months)
    The Farming Data is a webapp intended to be a tool for helping you to plan your looting game, or preventing you from doing it at all if you don't feel like it. It’s actually work in progress, made in Razor Pages with Blazor components. The database architecture is already done, I’m working on the UI to create an easy to use data input for community contributors. You can login with an account, Google or Steam.
  • i
    keeu.izzi.ar
    izzitech
    Jan 2021 - Current (4 years 6 months)
    Keeu is an all-in-one queue manager webapp made in blazor with an API for the WPF ticket dispenser. It’s flexibility allows you to attend multiple queues in one place, and show different queues in each monitor. It has a system that gives priority based on importance and waiting time. Currently, I’m working in making it freely available on-line with an independent account for each customer.
  • T
    Timon
    Jan 2015 - Dec 2020 (6 years)
    Timon is an ASP.NET Core web application that looks for patient health records in a proprietary Radiology Information System database (running on MySQL). For every record it looks for the availability of a medical report file and shows the corresponding "download report" picture (paper-leaf with a red cross). Visual design was done by me with Bootstrap+CSS.
  • C
    Cardiolizer
    Jan 2012 - Dec 2012 (1 year)
    Cardiolizer is a DICOM Server that receives cardiologic ultrasound Structured Reports (DICOM SR) and creates stylized templated reports on multiple formats (rtf, docx, odt, pdf, txt…). It’s just a bare bones console, every aspect is automated, the processing is transparent for the user.
  • C
    Monica
    Centro Diagnóstico Mon
    Jan 2012 - Dec 2020 (9 years)
    A co-working communication system was designed with flexibility in mind, using a composite design approach. Recipients, senders, and groups are treated as entities, so they can be arranged or grouped as needed. The destination of a message can be a user, a group, or a computer—any user who logs in to that machine will receive the message. Through the API, any system can send messages to users, computers, or groups. This system was developed using WinForms to maximize performance and compatibility. Even so, I was able to incorporate a pleasant design featuring modern aesthetics, avatars, and all the bells and whistles.