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Patrick Edgar Müller
Verified Expert in Engineering
Software Developer
Vancouver, BC, Canada
Toptal member since October 21, 2025
Bio
Patrick is a skilled entrepreneur with over a decade of experience in web development. He founded his first company at age 19 and has worked in many different segments and markets, including finance, outsourcing, accounting, and food and catering services. In addition to Rails, Patrick is experienced with React and Ember.js, optimizing background jobs and databases, upgrading Rails versions, and managing teams.
Portfolio
FullScript - FSLV Holdings LLC
Ruby on Rails (RoR), JavaScript, Ruby, Next.js, React, APIs...
Foodee
Ember.js, Redis, PostgreSQL, Sidekiq, Elasticsearch, Salesforce...
Ordway
Ruby on Rails (RoR), React, Sidekiq, Redis, PostgreSQL, APIs, Unit Testing
Experience
- Ruby on Rails (RoR) - 13 years
- PostgreSQL - 13 years
- Stimulus - 3 years
- JSONAPI::Resources - 3 years
- Elasticsearch - 3 years
- Ember.js - 3 years
- Hotwire - 3 years
- React - 1 year
Preferred Environment
Ruby on Rails (RoR), React, Ember.js, Elasticsearch
The most amazing...
...thing I've done is upgrade Rails 6 to 7, optimize APIs, and integrate five delivery partners—cutting errors and boosting platform reliability.
Work Experience
Senior Full-stack Developer
2025 - PRESENT
FullScript - FSLV Holdings LLC
- Transformed Figma mockups and pages into beautiful React components and pages.
- Helped the Get Stuff Done (GSD) team to iterate on newer projects using Rails, React, and NextJS.
- Leveraged the power of AI to iterate on new projects, focusing on fast results and rapid development.
Technologies: Ruby on Rails (RoR), JavaScript, Ruby, Next.js, React, APIs, Artificial Intelligence (AI), Unit Testing, Healthcare Software
Staff Developer
2022 - 2025
Foodee
- Led the project to upgrade from Rails 6 to 7, fix all the RuboCop issues, handle Gem upgrades and removals, standardize the entire codebase, and improve performance.
- Oversaw cost improvements and reductions related to the usage of the Salesforce API and services, along with improvements on the data standardization and quality, implementing a 2-way synchronization between Foodee and Salesforce.
- Implemented five different integrations with delivery partners from the Bay Area, Toronto, Vancouver, Austin, and New York. Created a dashboard to monitor the various integrations and health, and notify developers in case of problems.
Technologies: Ember.js, Redis, PostgreSQL, Sidekiq, Elasticsearch, Salesforce, JSONAPI::Resources, JavaScript, Ruby on Rails (RoR), REST, API Integration, APIs, Artificial Intelligence (AI), Unit Testing
Senior Full-stack Developer
2020 - 2021
Ordway
- Helped implement the integration with Salesforce, allowing Ordway customers to connect and configure the objects being synced (and exported) from their Salesforce instances directly to the Ordway platform.
- Led the development of the HubSpot integration, allowing customers to import clients and contacts and other types of records directly to Ordway's platform. The integration allowed customers to configure which fields and objects would be synced.
- Helped with customer support by fixing bugs and attending to critical bug tickets, using those opportunities to improve code quality, test coverage, and the QA workflow.
Technologies: Ruby on Rails (RoR), React, Sidekiq, Redis, PostgreSQL, APIs, Unit Testing
Senior Full-stack Developer
2019 - 2020
Yubb Brasil
- Partnered with the Product Owner at Yubb to realize his vision, extracting peak performance from the technical team. Together, we launched "QIM" (Quem Investe Melhor?), a major internal project.
- Worked on QIM, which achieved 7 million page views in H1 2020, with 1.5 million accesses alone. Though free, it attracted brokers for paid campaigns, significantly boosting Yubb's revenue and income budget.
- Worked as a full-stack developer at Yubb using Ruby on Rails, PostgreSQL, Redis, Sidekiq, and Solr. As project manager, I guided developers in delivering new features and monthly product improvements.
Technologies: Ruby on Rails (RoR), JavaScript, Redis, Sidekiq, APIs
Experience
RecAtlas
A Ruby on Rails, Hotwire, and Stimulus project to help parents from the Greater Vancouver Area find activities from community centers, designed entirely by me.
It uses Tailwind CSS for styling, all the Ruby on Rails 8 stack—including front-end—relies heavily on background jobs, and has search by geospatial coordinates for the activities.
It uses Tailwind CSS for styling, all the Ruby on Rails 8 stack—including front-end—relies heavily on background jobs, and has search by geospatial coordinates for the activities.
Find My Club
Find My Club is a platform designed to facilitate the search and management of micro and small clubs, usually those composed of many individuals and friends, or those seeking to join one.
The project is written using Ruby on Rails (the main framework), Redis, Sidekiq (for background jobs), Elasticsearch (for full-text search), and Hotwire and Stimulus on the front end.
The project is written using Ruby on Rails (the main framework), Redis, Sidekiq (for background jobs), Elasticsearch (for full-text search), and Hotwire and Stimulus on the front end.
Skills
Libraries/APIs
Sidekiq, JSONAPI::Resources, React
Tools
RubyMine, Claude, Hotwire
Languages
Ruby, JavaScript
Frameworks
Ruby on Rails (RoR), Ember.js, Stimulus, Tailwind CSS, Next.js
Paradigms
REST, Unit Testing
Storage
Redis, PostgreSQL, Elasticsearch
Platforms
MacOS, Linux, Salesforce
Other
API Integration, APIs, Artificial Intelligence (AI), Healthcare Software
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