Open to opportunities

Nicholas King

@nicholasking

Message

Senior Ruby on Rails engineer specializing in scalable web backends and full‑stack delivery.

United States

Message

What I'm looking for

I seek a role owning backend systems or full‑stack features at a collaborative, product‑focused company where I can mentor engineers, improve scalability, and integrate AI-driven user improvements.

I am a results-driven Senior Software Engineer with 12+ years designing, scaling, and maintaining consumer-grade web and mobile applications. I specialize in Ruby on Rails, PostgreSQL, Redis, and building performant REST/GraphQL APIs while driving end-to-end project ownership from design through deployment.

I have led major migrations and infrastructure refactors that improved uptime and reduced downtime, delivered features that increased user engagement by 30%, and implemented caching and query optimizations to reduce response times. I mentor engineers, collaborate closely with product and design teams, and explore AI-driven features to enhance user experiences.

Experience

Work history, roles, and key accomplishments

Current

Senior Ruby on Rails Engineer

Current

Artjoker

Oct 2018 - Present (6 years 11 months)

Designed and delivered end-to-end Rails and React features that increased user engagement by 30%; led Rails 5.2→7.x migration and infrastructure refactor that reduced downtime by 40% and cut release times by 50% via CI/CD automation.

Ruby on Rails PostgreSQL Redis React Heroku AWS CI CD Performance Optimization

Ruby on Rails Developer

Kitrum

Oct 2015 - Aug 2018 (2 years 10 months)

Built and scaled a multi-tenant SaaS platform supporting 100K+ MAUs, implemented Stripe billing with PCI DSS compliance, and refactored queries and caching to cut query latency by 60%.

Ruby on Rails PostgreSQL Redis Stripe ActiveRecord Sidekiq Caching PCI DSS Agile)

Junior Ruby on Rails Developer

Kitrum

Oct 2013 - Sep 2015 (1 year 11 months)

Supported development of e-commerce and marketplace apps on Rails 4.2, integrated third-party APIs (PayPal, FedEx, Twilio), and increased automated test coverage from 30% to 70%.

Ruby on Rails RSpec Minitest PayPal Twilio ActiveRecord API Integration

Education

Degrees, certifications, and relevant coursework

Lone Star College

Bachelor of Science, Computer Science

2008 - 2013

Completed a Bachelor of Science in Computer Science at Lone Star College between 2008 and 2013 with coursework in software development and systems engineering.