Argentina | cabreramxr@gmail.com | github.com/mxrcabrera | linkedin.com/in/marianella-cabrera-ahumada
About
Senior Full Stack .NET Engineer with 12+ years of experience building and modernizing production software across logistics, healthcare, SaaS, e-commerce, telecommunications, and enterprise environments. Specialized in C#, .NET, ASP.NET Core, REST APIs, React, TypeScript, Azure, PostgreSQL, SQL Server, distributed systems, and complex third-party integrations.
I specialize in solving difficult and ambiguous engineering problems across the full software lifecycle: understanding business requirements, designing practical technical solutions, implementing them hands-on, integrating external systems, optimizing performance, and supporting production software. My experience includes legacy modernization, backend architecture, resilient integrations, database optimization, asynchronous processing, messaging, caching, real-time systems, and cloud-native applications.
I bring broad hands-on experience across different systems and business domains, with a focus on building software that is reliable, maintainable, and practical to operate. I also have hands-on AI engineering experience across Python, NLP, Large Language Models, conversational AI, AI agents, prompt engineering, and machine learning evaluation.
- 12+ Years Experience
- 5 Projects
- 10+ Technologies
- Available Status
Work Experience
Senior Full Stack .NET Engineer at BUKU Ship
Remote
Built and maintained a large-scale logistics platform using .NET Core 8, C#, Blazor Server, PostgreSQL, and REST APIs. Developed checkout and shipping workflows integrating external carriers and logistics providers including FedEx, UPS, and DHL. Designed an adapter-based integration architecture that isolated provider-specific behavior from the core platform, making carrier integrations easier to maintain and extend. Implemented resilient API communication using retry policies and circuit breakers, improving the platform's ability to handle failures and instability in external carrier services. Designed PostgreSQL schemas, migrations, and optimized queries supporting shipment tracking and high-volume logistics workflows. Contributed across API testing, CI/CD, code reviews, troubleshooting, and production support, helping maintain reliable logistics operations throughout the delivery lifecycle.
Technologies: C#, .NET 8, Blazor, PostgreSQL, REST APIs, RabbitMQ, Docker
Senior Full Stack .NET Engineer at Solvo Global
Remote
Developed an ASP.NET Core healthcare and e-commerce platform using C#, React, REST APIs, MySQL, and Microsoft Azure. Designed Azure Functions triggered by Blob Storage events to automate medical video processing and move resource-intensive workloads away from the main application flow. Built asynchronous workflows for video encoding and content delivery, providing a scalable approach to resource-intensive media processing. Improved application performance through Redis caching, SQL optimization, and ETL workflows. Translated healthcare and e-commerce requirements into production-ready backend services and cloud workflows, connecting application needs with practical technical solutions.
Technologies: C#, ASP.NET Core, React, REST APIs, MySQL, Azure, Azure Functions, Redis, SQL Server
AI Training Specialist at Outlier AI
Remote
Worked on AI training and evaluation projects focused on Large Language Models and conversational AI. Evaluated AI-generated responses across complex scenarios using criteria including accuracy, reasoning, relevance, consistency, and instruction following. Created Python-based evaluation workflows covering 200+ conversational scenarios and edge cases. Designed evaluation criteria and feedback loops to identify model weaknesses and improve response quality. Applied NLP and machine learning evaluation techniques to analyze conversational AI behavior and provide structured model feedback.
Technologies: Python, NLP, LLM Evaluation
Senior Full Stack .NET Engineer at CH2 Solutions
Remote
Developed enterprise features using .NET Core, C#, React, Redis, Docker, and SQL Server. Implemented REST APIs, SignalR real-time notifications, and role-based access control to support responsive and secure platform functionality. Improved backend performance, scalability, and maintainability through code-level and architectural optimization. Worked across feature development, integration, testing, deployment, troubleshooting, and production improvements.
Technologies: C#, .NET Core, React, Redis, Docker, SQL Server, SignalR
Senior Full Stack .NET Engineer at Kiltex S.A.
Buenos Aires
Developed enterprise applications using C#, .NET Framework, Entity Framework, React, Angular, SQL databases, Redis, and Docker. Modernized legacy applications and implemented backend functionality and third-party integrations, extending existing systems without requiring complete rewrites. Improved reliability, performance, and maintainability through refactoring, database optimization, and architectural improvements.
Technologies: C#, .NET Framework, Entity Framework, React, Angular, Redis, Docker, SQL Server
Senior Full Stack .NET Engineer at Cencosud
Buenos Aires
Developed VTEX-based storefronts, promotional pages, reusable frontend components, and e-commerce layouts for major retail brands. Implemented responsive HTML/CSS/JavaScript solutions and SEO improvements for high-traffic retail platforms. Supported time-sensitive commercial releases and promotional campaigns, including Hot Sale initiatives.
Technologies: JavaScript, HTML/CSS, UX Design, VTEX
Projects
Built an AI-powered job matching platform using Next.js, Python, and NLP. Implemented PDF resume parsing and job-description analysis to generate tailored CV content aligned with specific job requirements, combining application development with practical LLM and NLP workflows.
Technologies: Next.js, Python, NLP
Built and launched a SaaS platform using Next.js 15, React 19, Prisma, and PostgreSQL to replace manual WhatsApp and Excel-based studio management. Implemented class scheduling, recurring classes, student management, attendance tracking, package and remaining-class control, payment tracking, debt visibility, automatic proration, Google Calendar synchronization, email notifications, Excel export, waitlists, and reporting. Designed a Free plan and 14-day Pro trial with role-based onboarding and subscription feature limits.
Technologies: Next.js, React, Prisma, PostgreSQL
Built a professional matching platform using React, Node.js, Express, Tailwind CSS, and Mercado Pago API. Implemented authentication, role-based access control, payment processing, and real-time match notifications, connecting user workflows with secure payments and event-driven application behavior.
Technologies: React, Node.js, Tailwind CSS, Mercado Pago API
Developed and customized e-commerce storefronts, reusable frontend components, API integrations, promotional pages, product workflows, and SEO improvements for retail clients. Worked across Shopify and VTEX environments to deliver customer-facing commercial experiences.
Technologies: Shopify, VTEX, JavaScript, HTML/CSS
Built a developer portfolio using Astro, Next.js, React, Tailwind CSS, and Netlify. Included a task management application with drag-and-drop functionality and an Optimizely project demonstrating feature flags, A/B testing, content personalization, and event tracking.
Technologies: Astro, Next.js, React, Tailwind CSS