Open to opportunities

Alexander Espinoza

@alexanderespinoza

Message

Senior Backend Engineer and technical founder building scalable Rails apps and APIs.

United States

Message

What I'm looking for

I seek a senior-level, product-driven role where I can design scalable backend systems, lead engineering efforts, mentor teammates, and deliver measurable customer impact.

I am a Senior Backend Engineer and technical founder with 10+ years building and scaling production Ruby on Rails applications, APIs, and Shopify apps for SaaS and DTC clients. I founded and grew a profitable boutique agency, led a remote engineering team, and directly contributed to six/seven-figure annual revenue.

My work emphasizes reliable architecture, efficient background processing, and pragmatic integrations that save time and cost—designing solutions used by thousands of daily active users and reducing manual operations by hundreds of man-hours.

I enjoy taking ownership of technical strategy through implementation, mentoring engineers, and shipping product-focused features that drive measurable business value.

Experience

Work history, roles, and key accomplishments

Current

Senior Backend Engineer

Current

Aesymmetric

Jan 2017 - Present (9 years 1 month)

Founded and operated a boutique development agency, sold and built custom Rails and Shopify applications driving six/seven-figure annual revenue and supporting thousands of daily active users. Led a remote 3-person engineering team, owned client-facing responsibilities, and implemented automations that saved hundreds of man-hours.

Ruby Ruby on Rails PostgreSQL Redis Sidekiq API Design AWS CI CD

Creative Technologist

MullenLowe U.S.

Jan 2014 - Dec 2017 (3 years 11 months)

Conceptualized and developed Rails applications and API backends for major brands (e.g., National Geographic, JetBlue), contributed to front-end prototypes, and won a 2015 internal agency award for standout development work.

Ruby on Rails API Development Prototyping JavaScript HTML CSS

Ruby on Rails Developer

Fundraise.com

Jan 2013 - Dec 2014 (1 year 11 months)

Maintained and extended a Ruby on Rails application, implemented new functionality and built front-end marketing and client landing pages while assisting client technical onboarding.

Ruby on Rails HTML CSS JavaScript Client Onboarding