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I am a Senior Software Developer with 20+ years in IT, focusing on the .NET ecosystem. I specialize in C#, ASP.NET Core, .NET MAUI, and RESTful APIs, with a strong background in enterprise architecture, legacy-to-.NET migrations, and offline-first mobile development.\n\nI have extensive experience in application security and fraud prevention in the financial sector, plus cloud infrastructure on Azure and AWS. I have led cross-functional teams on international projects across Mexico and the United States, delivering robust, scalable solutions while mentoring teams to adopt best practices.…I am a Senior Software Developer with 20+ years in IT, focusing on the .NET ecosystem. I specialize in C#, ASP.NET Core, .NET MAUI, and RESTful APIs, with a strong background in enterprise architecture, legacy-to-.NET migrations, and offline-first mobile development.\n\nI have extensive experience in application security and fraud prevention in the financial sector, plus cloud infrastructure on Azure and AWS. I have led cross-functional teams on international projects across Mexico and the United States, delivering robust, scalable solutions while mentoring teams to adopt best practices.

Tiago Sarri

Full Stack Developer, Developer, Web Developer, +4

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I am a Senior Software Developer with 20+ years in IT, focusing on the .NET ecosystem. I specialize in C#, ASP.NET Core, .NET MAUI, and RESTful APIs, with a strong background in enterprise architecture, legacy-to-.NET migrations, and offline-first mobile development.\n\nI have extensive experience in application security and fraud prevention in the financial sector, plus cloud infrastructure on Azure and AWS. I have led cross-functional teams on international projects across Mexico and the United States, delivering robust, scalable solutions while mentoring teams to adopt best practices.…I am a Senior Software Developer with 20+ years in IT, focusing on the .NET ecosystem. I specialize in C#, ASP.NET Core, .NET MAUI, and RESTful APIs, with a strong background in enterprise architecture, legacy-to-.NET migrations, and offline-first mobile development.\n\nI have extensive experience in application security and fraud prevention in the financial sector, plus cloud infrastructure on Azure and AWS. I have led cross-functional teams on international projects across Mexico and the United States, delivering robust, scalable solutions while mentoring teams to adopt best practices.

Available to hire

I am a Senior Software Developer with 20+ years in IT, focusing on the .NET ecosystem. I specialize in C#, ASP.NET Core, .NET MAUI, and RESTful APIs, with a strong background in enterprise architecture, legacy-to-.NET migrations, and offline-first mobile development.\n\nI have extensive experience in application security and fraud prevention in the financial sector, plus cloud infrastructure on Azure and AWS. I have led cross-functional teams on international projects across Mexico and the United States, delivering robust, scalable solutions while mentoring teams to adopt best practices.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Beginner

Language

Portuguese

Fluent

English

Intermediate

Spanish; Castilian

Intermediate

Work Experience

IT Architect and Team Leader at Tennant Company

January 1, 2020 - May 31, 2025

Led system upgrades to the latest .NET Core versions, optimizing security, performance, and maintainability. Managed large-scale HangFire job processing efficiently, dealing with over 250,000 jobs. Developed and maintained complex SQL queries and database management with SQL Server, Oracle, and MongoDB handling millions of IoT records. Built Angular dashboards for real-time data visualization. Designed and deployed RAT Digital, an offline-capable technician app with digital signatures. Developed high-volume APIs for technician apps and IoT data monitoring. Implemented ITIL practices and project management tools like Trello, enhancing development workflows and team collaboration. Coordinated cross-border development projects involving teams from Mexico and the United States.

Systems Consultant and Senior FullStack Developer at Freelance

January 1, 2018 - January 1, 2020

Collaborated with large enterprise clients such as Votorantim, Gol, Bradesco, and Fiat on digital transformation projects. Designed and implemented solutions using C#, PHP, ASP.NET Core, Xamarin, Angular, RESTful APIs, and SharePoint tailored to client requirements. Analyzed stakeholder needs, defined architectures, and provided accurate technical estimates. Delivered custom integrations and automations improving operational efficiency by up to 30%. Applied ITIL methodologies to refine development workflows and fostered continuous technological innovation. Ensured quality via code reviews, automated testing, and best practices.

IT Manager at Nuova Comunicação

June 1, 2015 - January 1, 2018

Managed end-to-end IT operations aligning technology initiatives with business goals. Spearheaded migration from SVN to Git, improving development speed and collaboration. Introduced modern frameworks and cloud platforms including AWS and Azure, cutting costs and increasing scalability. Led strategic projects for process optimization and system integration delivered on time and budget. Enforced ITIL practices enhancing incident management and response times by 20%. Structured teams into dedicated support and development squads with workload rotation. Mentored and directed the IT team, encouraging ongoing learning and clear objectives.

Senior Software Developer at Nuova Comunicação

September 1, 2012 - June 1, 2015

Led architecture and delivery of scalable enterprise applications specializing in SharePoint 2010/2013 development. Developed reusable SharePoint frameworks and custom web parts to accelerate projects. Promoted best practices such as code reviews, automated builds (TFS), continuous integration, and unit testing boosting productivity and quality. Created innovative SharePoint product templates enhancing user adoption. Mentored junior developers fostering teamwork and knowledge sharing.

Software Developer – Ruby on Rails & Mobile at Firefly On

November 1, 2010 - July 1, 2012

Developed Ruby on Rails backend services and Android mobile features delivering scalable and maintainable solutions for a start-up. Built real-time sports statistics platform managing data with MongoDB and MySQL. Implemented Memcache caching reducing latency under load. Managed Heroku infrastructure with dynamic dynos ensuring high availability. Applied Git, TDD, and BDD practices ensuring high automated test coverage and rapid releases. Optimized code and queries improving response times.

.NET Developer at Nuova Comunicação

January 1, 2008 - October 1, 2010

Developed and maintained enterprise Microsoft .NET Framework applications using MOSS and WSS enhancing business processes. Collaborated with clients including Votorantim, Embraer, and Samarco delivering customised Web Parts, event receivers, and workflow automations. Improved team productivity introducing reusable SharePoint components and development standards. Advanced from Junior to Mid-Level Developer in under three years expanding platform expertise. Earned Microsoft SharePoint certifications.

Mid-Level ASP Developer at E-Commerce Solution’s

December 1, 2006 - December 31, 2007

Developed complete e-commerce solutions with classic ASP, including product catalogs, shopping carts, and order management. Integrated payment gateways ensuring PCI compliance and improved transaction success. Designed and maintained SQL Server databases focusing on schema, performance, backups, and data integrity. Collaborated with front-end and back-end teams for feature delivery and support. Automated database monitoring reducing support incidents.