Open to opportunities

Ronny Rojas

@ronnyrojas

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Senior engineer with 15+ years in fintech and healthcare software.

Costa Rica

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What I'm looking for

I seek a collaborative environment that fosters innovation and offers opportunities for growth.

I am a senior engineer with over 15 years of experience specializing in fintech and healthcare software. My expertise lies in full stack systems development, where I have successfully designed and implemented scalable APIs and cloud-native deployments. I thrive in environments that challenge my technical skills and allow me to contribute to high-performance platforms.

Throughout my career, I have led teams in developing secure, scalable medical payment platforms and have been instrumental in migrating monolithic systems to distributed architectures. My role at Frontier Direct Care has honed my abilities in team mentorship, where I conduct peer code reviews and provide technical coaching to enhance code quality and onboarding efficiency.

With a strong foundation in technologies such as Ruby on Rails, Angular, and Microsoft .NET, I am passionate about delivering end-to-end solutions that drive business success. I am eager to leverage my skills in a dynamic environment that values innovation and collaboration.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack Software Engineer / Lead

Current

Frontier Direct Care

Aug 2017 - Present (7 years 11 months)

Led the design, development, and automation of financial systems and integrations for a secure, scalable medical payment platform. Built secure, scalable Ruby on Rails (RoR) APIs for healthcare transactions with Dwolla, Stripe and USIO; led technical debt reduction, async job design, and performance tuning via view-backed models and N+1 query resolution, while managing upgrades from Rails 3 to 7 a

Ruby on Rails Dwolla Stripe USIO Microservices Event Driven Design Angular Playwright CI CD SQL

Senior Software Engineer

Tradestation

Jul 2014 - Jul 2017 (3 years)

Participated in Microsoft Dynamics CRM integration and internal systems connectivity for B2B onboarding initiatives using Microsoft technologies. Delivered end-to-end solutions using AngularJS, ASP.NET, and SQL Server, including enhancements to internal trading tools and user-facing CRM extensions.

Microsoft Dynamics CRM AngularJS ASP.NET SQL Server RESTful Services ASP.NET Web API 2 C

Senior Software Engineer (.Net)

Publicis Groupe

Jul 2013 - Jul 2014 (1 year)

Contributed to software development projects using .Net technologies. Focused on enterprise-level applications.

.NET C SQL HTML CSS Azure

Software Engineer (.Net)

Fiserv

Dec 2011 - Jun 2013 (1 year 6 months)

Developed and maintained applications using .Net. Collaborated on various software engineering tasks.

.NET C SQL Software Development Lifecycle

Application Developer (.Net)

AdvanceMe

Aug 2010 - Jul 2011 (11 months)

Worked as an Application Developer, focusing on .Net applications. Participated in the full software development lifecycle.

.NET C SQL Application Development

Junior Software Engineer

Rich Coast IT

Aug 2007 - Jul 2010 (2 years 11 months)

Began career as a Junior Software Engineer. Gained foundational experience in software development.

Software Development Problem Solving

Education

Degrees, certifications, and relevant coursework

Universidad Latina

Bachelor of Science, Computer Science Engineering

Activities and societies: Developing ASP.NET MVC 4 Web Application (Cert. #E306-4409).

Completed a Bachelor of Science degree in Computer Science Engineering. Gained foundational knowledge in computer science principles and engineering practices.