Senior Engineer .NET, Node.js

Julieta D’Angelo

Senior .NET / Node.js Developer

Mar del Plata, Buenos Aires, Argentina

(+54) 9-223-******* **********@*****.***

LinkedIn: https://www.linkedin.com/in/julietadangelo Professional Summary

Full Stack Developer with over 20 years of experience building software solutions across multiple industries. Skilled in .NET, Node.js, and modern web technologies, with hands-on practice in both backend and frontend development. I value teamwork, clear communication, and mutual support in achieving goals. Colleagues recognize me for being committed to projects, delivering with responsibility, and building strong professional relationships. Over the years, I have adapted to new technologies while maintaining a practical and solution-oriented mindset. Skills

Node.js • TypeScript • .NET Core • C# • ASP.NET MVC • JavaScript • NestJS Web3 • Smart Contracts • Blockchain • Razor • Bootstrap • Google Cloud • Azure Functions SQL Server • Oracle • MySQL • MongoDB • Entity Framework • LINQ • Firestore • Firebase Git • Agile • Borland Delphi • PHP • ASP Classic

Professional Experience

Healthcare Platform (Mar 2025 – Present)

Senior Nest.js Backend Developer

* NestJS, TypeScript, Firebase Admin SDK, Firestore, Google Cloud, Nx

- Contributed to a monorepo architecture with Nx, enabling modular services and shared libraries.

- Built and maintained backend services with NestJS and integrated with Firestore for real-time data management of patients, appointments, payments, and prescriptions.

- Implemented automated processes such as daily data synchronization, scheduled tasks with Pub/Sub, and report generation.

- Developed reporting features with ExcelJS for backoffice operations.

- Collaborated with the team to establish structured logging and monitoring for production debugging.

- Supported improvements in data migrations, error handling, and system maintainability. Trick Studios (Apr 2018 – Present)

Senior Node.js Backend Developer

* Node.js, TypeScript, Express.js, MongoDB, JWT, Web3, Blockchain, Smart Contracts, Winston, Axios

- Designed and implemented a layered backend architecture (controllers, services, models, middlewares) applying clean code and dependency injection practices.

- Built user management, wallet integration, points/rewards, leaderboard, and activity monitoring features.

- Applied strong security standards with JWT authentication, HMAC signatures, and Helmet middleware.

- Developed a structured logging system using Winston to improve monitoring and troubleshooting.

- Worked on improving database design with Mongoose schemas and indexes, supporting scalability.

- Collaborated with team members to design and implement blockchain integrations and smart contracts.

- Supported frontend with minor contributions to React Native.

- Actively shared knowledge with teammates and supported project delivery under tight deadlines. Senior .NET Full Stack Developer

* C#, .NET Core, ASP .NET, MVC, SQL Server, Entity Framework, Razor, JavaScript, Bootstrap, Microservices, Dependency Injection

- Built enterprise-level solutions with .NET Core and ASP.NET MVC, integrating databases with Entity Framework and SQL Server.

- Designed and maintained microservices to ensure scalability, modularity, and better separation of concerns.

- Applied dependency injection patterns to improve maintainability, testability, and flexibility of applications.

- Created responsive interfaces with Razor, Bootstrap, and JavaScript.

- Actively shared knowledge with teammates and supported project delivery under tight deadlines. Freelance (May 2013 – Apr 2018)

Full Stack Developer

* C#, ASP .NET, MVC, SQL Server, Entity Framework, Razor, JavaScript, Bootstrap, PHP, MySQL, ASP

- Worked closely with clients to design and build custom web applications in .NET and PHP.

- Developed responsive websites with Bootstrap and JavaScript.

- Designed and implemented database solutions using SQL Server and MySQL.

- Delivered and maintained ASP Classic enterprise applications for long-term clients.

- Learned to manage projects independently while keeping constant communication with clients. Making Sense (Feb 2010 – Nov 2013)

.NET Full Stack Developer

* C#, ASP .NET, MVC, SQL Server, Entity Framework, Razor, JavaScript, Bootstrap

- Contributed to and later led modules of enterprise applications using C# .NET, MVC, and Entity Framework.

- Designed and optimized SQL Server data solutions for large-scale systems.

- Collaborated with international teams, improving cross-team coordination and delivery.

- Gained experience in mentoring junior developers and working in agile environments. Delsat Group (Sep 2002 – Dec 2008)

Delphi / .NET Developer

* Borland Delphi, Oracle, C#, ASP .NET, SQL Server

- Built and maintained desktop applications for the telecommunications industry using Borland Delphi and Oracle.

- Developed intranet applications with C# and SQL Server, improving business processes.

- Worked consistently with teammates on long-term projects, ensuring stability and continuity. Comtron (Jan 2001 – Feb 2003)

PHP Developer

* PHP, MySQL

- Built web medical solutions using PHP and MySQL.

- Collaborated with a small team, focusing on reliability and accuracy for healthcare clients. Synt (Jun 2000 – Jul 2002)

ASP Classic Developer

* ASP Classic, JavaScript, MySQL

- Developed modules for government intranets with ASP Classic, JavaScript, and MySQL.

- Learned to balance technical delivery with strict compliance requirements. Education

FASTA University – Mar del Plata

• Bachelor of Science in Information Systems (Aug 2007)

• Systems Analyst Degree

Languages

• Spanish: Native

• English: Upper intermediate

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