David Castañeda Backend Engineer | .NET Core, Azure Functions, SQL Server | 10+

Back End Developer

Tech First

Jul 2025 - Current (1 year 3 months)

Full-time backend developer serving a major financial institution. Daily operations conducted entirely in English. Execute lift-and-shift migrations of applications from legacy servers to modern infrastructure, ensuring zero downtime for critical financial services. Actively reduce technical debt by updating packages, modernizing caching solutions, and implementing efficient build pipelines. Maintain security and compliance standards by driving essential application updates for the financial sector client. Collaborate cross-functionally with architects, QA, and Business Systems Analysts (BSA) to guarantee smooth migrations and flawless deployments. Contribute to Agile/Scrum ceremonies including sprint planning, backlog grooming, and creatio

Solid backend developer

Capgemini Colombia S.A.S

Jul 2022 - Aug 2025 (3 years 2 months)

Enhanced legacy applications using .NET Core 3.1 and AngularJS while developing new solutions with PowerApps and Azure Functions. Designed and implemented serverless solutions using Azure Functions and Logic Apps, supporting integration projects and scalability improvements. Built and deployed CI/CD pipelines in Azure DevOps, reducing deployment time by 30%. Contributed to cloud modernization by implementing Service Principals and Managed Identities, improving security practices and ensuring compliance. Developed high-performance applications from scratch with Angular 15 and .NET 6/8, driving efficiency and user satisfaction. Worked closely with solution architects, QA, and DevOps teams delivering high-quality solutions following Agile meth

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SSR Advanced .NET Developer

Globantt

Feb 2022 - Jul 2022 (6 months)

Developed and optimized the ACV Auctions web application using .NET and Blazor, enhancing user experience and streamlining auction processes across the USA. Revamped the pre-screen tool adding new functionalities to collect and organize vehicle details, photos, audio, and videos, boosting seller engagement. Collaborated with architects and cross-functional teams to deliver quality solutions following Agile methodologies.

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Technical Leader

Data Technology S.A.S.

Jul 2020 - Jan 2022 (1 year 7 months)

Implemented RESTful API services and Azure Functions for Mercaderia Justo y Bueno, enhancing system performance and scalability. Designed efficient stored procedures in SQL Server, improving report generation time by 30%. Enhanced the MercaSupply application with Angular 8 and DevExpress UI controls, improving user engagement. Served as technical leader for the BBI Colombia (Tostao) project, guiding the team to successful outcomes.

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.NET and SQL Consultant

MyS servicios en consultoria

Aug 2017 - Jul 2020 (3 years)

Optimized 100% of SQL Server stored procedures (2000, 2008, 2014), enhancing query performance by 30% across 50+ key procedures. Developed a robust web application from scratch for DATAMART LOGISTIC 2017 using C#, DevExpress, and SQL Server 2008. Implemented a production tool shipment scheduler in Aguascalientes, Mexico, optimizing transport logistics. Engineered and optimized web applications, ETL processes, and web services in .NET for BAVARIA. • Leveraged Microsoft Azure services, specifically Azure Data Factory, to enhance ETL processes and data integration capabilities within the .NET ecosystem.

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Development and Testing Specialist

Super humanos

Aug 2016 - Aug 2017 (1 year 1 month)

Optimized 80% of stored procedures in the BUC application database, reducing wait times and improving user experience. Revamped 100% of the BUC application source code, achieving a 30% reduction in load time. Assisted in the migration of core banking systems to .NET, improving processing efficiency for 100,000+ customer accounts at ProCredit Bank Colombia.

Technical Consultant

BBVA

Jun 2014 - Aug 2016 (2 years 3 months)

Led software certification across distributed platforms, boosting deployment efficiency by 20% and ensuring robust validation. Drove seamless operation of the ATM laboratory, facilitating reliable testing environments.

Second Level Support Engineer

ITBF CONSULTING S.A.S.

Aug 2013 - Jan 2014 (6 months)

Delivered second-level support for on-site and remote errors, improving issue resolution time by 30%.

1

Database Analyst

1A Odonto

Oct 2012 - Jul 2013 (10 months)

Created efficient T-SQL stored procedures optimizing data loading from external databases and flat files.

David Castañeda

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David Castañeda