Guillermo Morini
Verified Expert in Engineering
Software Developer
Medford, MA, United States
Toptal member since January 12, 2026
Guillermo is a results-driven software engineer with more than a decade of experience in the field. A magna cum laude Boston University graduate, he specializes in full-stack development and cloud infrastructure. From optimizing payment systems and Salesforce migrations at Education First to automating workflows at Rover, Guillermo has a proven track record of reducing business risk and increasing operational efficiency using React, Node.js, and Terraform.
Portfolio
Experience
- Windows - 13 years
- JavaScript - 9 years
- Modern JavaScript - 9 years
- SQL - 8 years
- TypeScript - 7 years
- React - 7 years
- Express.js - 4 years
- Node.js - 4 years
Preferred Environment
Windows
The most amazing...
...achievement has been ensuring business continuity by switching payment processors under a tight deadline and mitigating risk with a payment tokenizer.
Work Experience
Software Engineer II
Rover
- Decreased customer call volume drastically by adding an in app method of pausing and restarting accounts, taking the project from given Figma designs, and working independently to architect and implement the new feature.
- Freed up employee time by automating repetitive processes, such as developing admin software to create PDF fliers with customized client logos and coupon codes.
- Worked on a team in a full-stack capacity to add an entirely new service offering from the company, requiring a mix of new development and integration with existing systems.
Senior Software Developer
EF Education First
- Served on the finance team and ensured business continuity by switching payment processors under a tight deadline. Mitigated risk by implementing a payment tokenizer and integrating Stripe as a new payment method.
- Spearheaded the migration of users from a proprietary internal customer relationship management (CRM) system to Salesforce, navigating and implementing intricate business requirements.
- Engineered reusable Terraform templates for AWS provisioning as part of the platform team, enhancing team reliability. Executed a phased migration to Amazon Cognito, avoiding the need for user password resets.
Software Engineer
Insight
- Developed a healthcare analytics dashboard that visualized critical KPIs, including bed occupancy rates, medical equipment utilization, and average patient stays.
- Created a specialized document reader for financial services that automated custom calculations to standardize data from hundreds of distinct client formats.
- Built the back-end services for a photo-sharing social media application, automatically syncing devices to the latest changesets.
Experience
Photo-sharing Social Media App
Education
Bachelor's Degree in Computer Science
Boston University - Boston, MA, USA
Certifications
HashiCorp Certified: Terraform Associate 2021
Hashicorp
Skills
Libraries/APIs
React, Node.js
Tools
Terraform, Webpack, Figma
Languages
Modern JavaScript, JavaScript, TypeScript, HTML, CSS, C#, SQL
Frameworks
Express.js, Redux, .NET
Paradigms
DevOps
Platforms
Amazon Web Services (AWS), Windows, Xamarin
Other
Web Development, Large-scale Projects, CI/CD Pipelines
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
Share your needs
Choose your talent
Start your risk-free talent trial
Top talent is in high demand.
Start hiring