Evan B. Sagge, Developer in Dallas, TX, United States
Evan is available for hire
Hire Evan

Evan B. Sagge

Verified Expert  in Engineering

Software Engineer and Developer

Location
Dallas, TX, United States
Toptal Member Since
April 8, 2022

Evan is a senior software developer with over ten years of experience leading small agile engineering teams. He is experient in implementing lean, clean, and scalable service-oriented web architectures for diverse industries. Evan is always committed to fostering a collaborative engineering environment for delivering more manageable and readable code to other engineers pursuing sustainable and adaptable product development.

Portfolio

Giftly Inc
Ruby on Rails (RoR), Full-stack, Vue, eCommerce, GitHub, Heroku, AngularJS...
CRC Financial
React, Node.js, JavaScript, Stripe, Full-stack, Material UI, MongoDB, Express.js
Cedar
Python, Django, AWS Lambda, PostgreSQL, Team Leadership, API Integration...

Experience

Availability

Part-time

Preferred Environment

OS X, Ruby, Node.js, Visual Studio Code (VS Code), Vim Text Editor, Heroku, Amazon Web Services (AWS)

The most amazing...

...project I've worked on is redesigning the architecture of a payments system that processes billions of dollars worth of transactions per day.

Work Experience

Lead Developer

2022 - PRESENT
Giftly Inc
  • Led the re-design and migration of the Giftly.com eCommerce platform from AngularJS to Vue.js and TailwindCSS with a more modern design and improved user experience, resulting in a 17.5% increase in customer conversion rates from the previous year.
  • Implemented A/B testing for customer product selection and checkout process in collaboration with SEO experts and growth teams, improving checkout conversion rates further by 8%.
  • Added unit and integration tests to core Giftly purchase and redemption flows and visual testing using BrowserStack/Percy for regression testing and increased fidelity when improving/modifying Giftly features.
  • Led the development of a new set of internal tools, including an admin management page to efficiently manage premium greeting card options and increase revenue from gift card purchases.
  • Led the development of a new set of fraud review tools, which reduced the weekly backlog of manual fraud reviews by 50% and increased fraud review throughput by 40%.
Technologies: Ruby on Rails (RoR), Full-stack, Vue, eCommerce, GitHub, Heroku, AngularJS, jQuery, Leadership, API Integration, Communication, Agile, Software Architecture, Single-page Applications (SPA), Technical Leadership, Angular, Stripe, Vue SSR, TypeScript, JavaScript

Full-stack Developer

2024 - 2024
CRC Financial
  • Implemented a subscription system with Stripe for a client project built with Node.js, React, MUI, and MongoDB.
  • Re-worked authentication system with JWT and access/refresh tokens to improve security and user experience.
  • Oversaw Stripe product catalog configurations and implemented webhooks to receive subscription and payment information from Stripe to automate subscription management.
Technologies: React, Node.js, JavaScript, Stripe, Full-stack, Material UI, MongoDB, Express.js

Staff Software Engineer

2023 - 2023
Cedar
  • Led the design and implementation of Cedar's payment dispute handling system to ensure dispute resolution accuracy, reducing overhead from manually addressing client issues with disputed payments and reducing the time to resolve disputes by 40%.
  • Managed the migration of the IVR system to Twilio API to make it more scalable and enhance UX with over-the-phone payments, increasing payment-by-phone completion rates by 25% and reducing client IVR onboarding times by 45% and opening.
  • Led the technical direction for the payment team by writing technical designs, planning quarterly roadmaps, and maintaining dependency alignment with other teams to ensure the timely delivery of projects.
  • Organized Agile team sprint processes and ceremonies, boosting team throughput and responsiveness to evolving project demands.
Technologies: Python, Django, AWS Lambda, PostgreSQL, Team Leadership, API Integration, Architecture, Healthcare, Project Management, Celery, Communication, Leadership, Agile, Software Architecture, Single-page Applications (SPA), Technical Leadership

Engineering Manager

2021 - 2023
Nurx
  • Managed a diverse team of 11 engineers, providing coaching and mentorship that resulted in five engineers earning promotions to senior levels.
  • Implemented team OKRs to enhance focus and drive strategic outcomes and aligned team initiatives with organizational goals, causing a clear vision for success for the Nurx team.
  • Streamlined team sprint processes, collaborated with product management, and improved cross-functional communication for faster project delivery.
  • Managed on-call rotations to ensure proper coverage and response to production issues.
Technologies: Node.js, Ember.js, JavaScript, APIs, Full-stack, REST APIs, REST, PostgreSQL, TypeScript, HTML, CSS, GitHub, Amazon Web Services (AWS), Jira, Code Review, Source Code Review, Interviewing, Technical Hiring, Task Analysis, Team Management, Git, React, Team Leadership, Healthcare, Project Management, Communication, Leadership, Agile, Technical Leadership, Express.js, Angular

Staff Software Engineer

2020 - 2021
Nurx
  • Led a team of five engineers in developing and launching new Nurx service lines, significantly expanding Nurx's healthcare offerings by four new service lines within the first year.
  • Optimized tooling for developing new Nurx service lines, reducing service line development time from three to four months to under one month on averagely sized service lines, enhancing delivery efficiency, and accelerating time-to-market.
  • Spearheaded initiatives to implement B2B services for Nurx service lines, enabling partnerships with businesses that aimed to provide healthcare to their employees via Nurx.
Technologies: Node.js, Ember.js, JavaScript, APIs, Full-stack, REST APIs, REST, PostgreSQL, TypeScript, HTML, CSS, GitHub, Amazon Web Services (AWS), Jira, Front-end Development, HTML5, JSON, Code Review, Source Code Review, Interviewing, Technical Hiring, Task Analysis, Team Management, Git, Front-end, React, Team Leadership, API Integration, Architecture, Healthcare, Project Management, Communication, Leadership, Agile, Software Architecture, Single-page Applications (SPA), Technical Leadership, Express.js, Angular

Staff Software Engineer

2019 - 2020
Procore
  • Led efforts to evaluate payment processors in support of a newly designed product.
  • Designed Procore’s payment system to be processor-agnostic and reduce the payment lifecycle duration from weeks to days for transactions between construction professionals.
  • Developed solutions to make Procore’s monolithic codebase more scalable as the company was evolving and the engineering team changing.
  • Instituted domain-driven design and domain modeling practices as part of the requirements gathering for projects.
Technologies: Ruby on Rails (RoR), React, JavaScript, APIs, Full-stack, REST APIs, Ruby, REST, PostgreSQL, MySQL, HTML, CSS, GitHub, Amazon Web Services (AWS), Jira, Front-end Development, HTML5, JSON, Devise, Code Review, Source Code Review, Interviewing, Technical Hiring, Task Analysis, Team Management, Git, Front-end, Team Leadership, API Integration, Architecture, Project Management, Domain Modeling, Communication, Leadership, Agile, Software Architecture, Single-page Applications (SPA), Technical Leadership

Senior Software Engineer

2016 - 2019
Venmo
  • Led the development of a new ACH processing system to ensure the transfer of money between Venmo accounts and user bank accounts, resulting in more stable services, a reduced monetary loss for the company, and increased customer satisfaction.
  • Reduced legal liabilities on dormant Venmo accounts by refactoring the escheatment process.
  • Organized and managed on-call rotations for back-end engineers to remediate high-urgency issues and documented playbooks on triaging incoming incidents.
Technologies: Python, JavaScript, APIs, REST APIs, REST, MySQL, HTML, CSS, GitHub, Amazon Web Services (AWS), Jira, Front-end Development, HTML5, JSON, Code Review, Source Code Review, Interviewing, Task Analysis, Git, Django, React, API Integration, Architecture, Project Management, Celery, Communication, Leadership, Agile, Software Architecture, Single-page Applications (SPA), Technical Leadership, Express.js

Senior Software Engineer

2015 - 2016
Entelo
  • Improved candidate sourcing for Entelo users by leading the implementation of a follow-up feature to Entelo’s. Track product.
  • Increased Entelo search performance through the design of a data aggregation system for use with Entelo products.
  • Scaled the team and the codebase by introducing best practices, coding conventions, code coverage tracking, code metrics tracking, and increased performance for our applications by removing bottlenecks on both our code and our database usage.
Technologies: Ruby on Rails (RoR), JavaScript, APIs, Full-stack, REST APIs, Ruby, REST, MySQL, HTML, CSS, GitHub, Amazon Web Services (AWS), Front-end Development, HTML5, JSON, Devise, Code Review, Source Code Review, Interviewing, Git, Front-end, Django, API Integration, Communication, Agile, Single-page Applications (SPA), Technical Leadership, Express.js, Angular

Software Engineer

2013 - 2015
Quad Learning
  • Developed new features for the American Honors online learning and collaboration web application.
  • Created the American Honors platform architecture and turned it into a distributed and service-oriented cluster of web APIs and applications.
  • Designed authentication and authorization systems across the Quad Learning architecture.
Technologies: Ruby on Rails (RoR), JavaScript, APIs, Full-stack, REST APIs, Ruby, REST, PostgreSQL, MySQL, HTML, CSS, GitHub, Amazon Web Services (AWS), Front-end Development, HTML5, JSON, Code Review, Source Code Review, Interviewing, Git, Front-end, Django, Communication, Education, Agile, Single-page Applications (SPA), Angular

Software Developer

2012 - 2013
Gannett
  • Implemented software solutions to Gannett's advertising department using Ruby on Rails.
  • Built integration tools with Salesforce and Apex JavaScript.
  • Created tools for process performance measuring using DTrace.
Technologies: Ruby on Rails (RoR), Full-stack, Ruby, REST, MySQL, HTML, CSS, GitHub, Amazon Web Services (AWS), HTML5, JSON, Code Review, Source Code Review, Git, Communication, Agile

Technical Lead

2005 - 2012
Exist Global
  • Led the development of the Infinite.ly social media management app using Ruby on Rails, MongoDB, Redis, Rescue, and Elastic Search.
  • Designed interfaces to connect with external web APIs to obtain social media data as part of the client's work.
  • Consulted with the company's business clients and implemented and maintained web and mobile applications, most of which were developed with Ruby on Rails.
Technologies: Ruby on Rails (RoR), JavaScript, APIs, Full-stack, REST APIs, Ruby, REST, PostgreSQL, MySQL, HTML, CSS, GitHub, Amazon Web Services (AWS), HTML5, JSON, Code Review, Source Code Review, Interviewing, Technical Hiring, Git, Front-end, Communication, Agile

Accountant | Personal Finance Management

Personal finance management built using Ruby on Rails 7 as the back-end API, serving RESTful resources using JSON API specifications, and Vue 3 as the front end.

On the front end, I'm using Plaid Link to connect a user's bank account to the system, and using the information, the back end leverages the Plaid API to aggregate account information and financial transactions.

It's also leveraging Plaid webhooks to get signals from Plaid when additional data can be fetched from the Plaid API. I'm using Sidekiq for asynchronous tasks, such as fetching data from the Plaid API and automating account balance refreshes.

I initially used MongoDB with Mongoid to prototype this but have since migrated to using PostgreSQL.

Rate-a-resto

Rate-a-resto is a restaurant rating system that I built with a React front end and Ruby on Rails API. I used Semantic UI for the front end design and implemented RESTful resource endpoints for the back end, adhering to JSON:API specifications. The authentication is done using JSON Web Tokens (JWT), generated on sign-in, and passed back to the client through response headers.

Lead Developer for Consumer Pages Re-design

http://giftly.com
I acted as the software developer in an ongoing re-design of the Giftly consumer-facing website. Working with other developers, designers, product managers, and product owners to set technical specifications, timelines for delivery, and prioritizations, and led back-end and front-end software development in Ruby on Rails and Vue.
2000 - 2005

Bachelor of Science Degree in Computer Engineering

Ateneo de Manila University - Manila, Philippines

2000 - 2004

Bachelor of Science Degree in Physics

Ateneo de Manila University - Manila, Philippines

Libraries/APIs

React, Vue, REST APIs, Node.js, Devise, Ruby on Rails API, JSONAPI::Resources, JSON API, Vue 3, Mongoid, Sidekiq, PrimeVue, Rollbar, Stripe, jQuery

Tools

GitHub, Jira, Git, Celery

Frameworks

Ruby on Rails (RoR), Django, Express.js, Angular, Ember.js, JSON Web Tokens (JWT), Ruby on Rails 7, PrimeFaces, AngularJS, Vue SSR, Material UI

Languages

Ruby, Python, JavaScript, HTML, CSS, HTML5, TypeScript

Paradigms

REST, Agile

Storage

PostgreSQL, MySQL, JSON, MongoDB

Platforms

Amazon Web Services (AWS), Heroku, AWS Lambda

Industry Expertise

Healthcare, Project Management

Other

APIs, Full-stack, Code Review, Source Code Review, Interviewing, Technical Hiring, Task Analysis, Leadership, Front-end, Full-stack Development, API Integration, Single-page Applications (SPA), Technical Leadership, Front-end Development, Team Management, Team Leadership, Architecture, Communication, Software Architecture, Semantic UI, Pinia, eCommerce, Domain Modeling, Education

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.

1

Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring