Open to opportunities

Erick Contreras

@ercntreras

Message

Software engineer specializing in scalable Ruby on Rails backends, TDD, and payment integrations.

Mexico

Message

What I'm looking for

I seek remote roles where I can build scalable Rails backends, lead TDD practices, mentor engineers, and work on secure payment and auth integrations with reliable CI/CD.

I am a results-oriented software engineer with over three years building scalable Ruby on Rails production applications, focused on robust backend systems, payment integrations, and secure authentication flows.

I champion Test-Driven Development and clean architecture, have mentored developers, and conducted 300+ rigorous code reviews in remote-first environments to raise code quality and reduce technical debt.

My hands-on experience includes designing high-throughput REST APIs, SSO with OAuth/OIDC, Stripe integrations, Sidekiq background processing, and CI/CD with Docker and GitHub Actions to deliver reliable, maintainable systems.

Experience

Work history, roles, and key accomplishments

Software Engineer

Civica Digital

Oct 2023 - Mar 2024 (5 months)

Engineered high-throughput REST APIs that reduced manual PDF processing time by 40% and implemented Google OAuth/OIDC SSO, improving security and reducing login support tickets.

Ruby on Rails RESTful APIs OAuth Sidekiq RSpec PostgreSQL TDD Docker

Ruby Developer

Apex Systems

May 2022 - Jun 2023 (1 year 1 month)

Led backend Stripe Level 2/3 integrations and built a custom Stripe Link checkout flow, improving transaction granularity and checkout conversion while refactoring legacy controllers into Service Objects.

Ruby on Rails Stripe Integration JavaScript Service Objects RSpec PostgreSQL TDD CI CD

Technical Mentor

Microverse

Sep 2021 - May 2022 (8 months)

Performed 300+ detailed code reviews and mentored 30+ international developers in TDD, algorithms, and debugging, facilitating their transition to job-ready engineers in a remote environment.