Gustavo Quesada

I am a Senior Full-Stack Developer with over 18 years of experience delivering scalable, high-performance web applications in the CRM, e-commerce, and financial domains. My expertise lies in the Microsoft technology stack (C#, ASP.NET, SQL Server), cloud integration, and clean architectural patterns such as DDD and CQRS. I thrive in Agile environments, where I enjoy mentoring teams, driving architectural improvements, and optimizing complex systems for reliability and maintainability.

Throughout my career, I have successfully led development efforts for both startups and enterprise-level companies, contributing to key systems such as SaaS accounting platforms, title loan systems, and loyalty programs. I'm passionate about code quality, automation, and continuously learning new technologies to solve real-world problems.

🔧 Tech Skills

Languages & Frameworks:

C#, .NET Core, ASP.NET MVC, T-SQL, JavaScript, HTML5, Xamarin

Architecture & Patterns:

OOP, Clean Code, DDD, CQRS, Design Patterns, BFF, Modularization

Cloud & DevOps:

AWS (S3, SQS, CloudWatch), Azure DevOps, Git, Jenkins, TeamCity, Git Hooks, CI/CD Pipelines

API & Integration:

RESTful APIs, Swagger, JWT, WCF, SOAP, Entity Framework, Dapper

Testing & Quality:

NUnit, Moq, AutoFixture, ReSharper, Postman, Playwright, Unit Testing, End-to-End Testing, Automated Testing

Data & Reporting:

SQL Server, Query Optimization, SSRS, SSAS, SQL Profiler

Monitoring & Observability:

AWS CloudWatch, NLog, dotTrace, Visual Studio Profiling

Environment Management:

Multilingual Apps, Multi-Tenant Systems, Multi-Environment Deployment (Dev, QA, Staging, Prod)

Collaboration & Documentation:

Jira, Confluence, Agile (Scrum), Draw.io

🤝 Soft Skills

Effective cross-team communication

Mentoring junior developers

Proactive problem-solving

Strong team collaboration

Senior Full-Stack Developer with over 18 years of experience building scalable web applications across industries such as film/TV accounting, financial lending, loyalty programs, and e-commerce. Specialized in Microsoft technologies (C#, ASP.NET, SQL Server), software architecture (DDD, CQRS), automated testing, and cloud deployment (AWS, Azure).

Proven track record leading technical initiatives, migrating monolithic systems to modular architectures, and integrating complex third-party APIs. Strong focus on code quality, system performance, and mentoring teams in Agile environments.

Bachelor’s Degree in Computer Science Engineering

Universidad Internacional de las Américas, Costa Rica

(2002 – 2006)

Solid foundation in software development, data structures, and information systems.

Master’s Degree in Database Technologies (paused)

Universidad CENFOTEC – Remote

(2016 – 2017)

Graduate studies focused on data modeling, query optimization, and data architecture.

Conversational English Programs

Centro Cultural Costarricense Norteamericano & Intesa

Advanced level (equivalent to B2), strengthening professional communication skills in English.