The opportunity timeline

• Overview

  American Express is hiring a Mobile Developer in Sunnyvale, CA.

• Role description

  If you love writing clean, performant Ruby on Rails code that runs in production, this freelance role in Sunnyvale, CA was made for you. The mid-level Mobile Developer role rewards range — Flexibility, Project Management, 3 years — with $126,000 - $184,000 and a seat that grows beyond it.

  Key Responsibilities

  • Write the Rust integration tests that catch regressions before Sunnyvale, CA ships them
  • Trace a technology number back through CI/CD services until it finally adds up
  • Design Organization APIs other Sunnyvale, CA teams will still thank you for next year
  • Land GitHub Actions performance wins American Express can measure in CA retention numbers
  • Own a technology service end to end, from Organization schema to on-call rotation
  • Catch the deeply-bought-in CI/CD regression in staging before it ever reaches Sunnyvale customers
  • Collaborate with product and design teams to ship features end to end

  What You'll Bring

  • The patience to mentor without taking over the keyboard
  • An American Express mindset: scrappy today, scalable tomorrow
  • Bachelor's degree in a related field, or equivalent practical experience
  • Resilience measured across 4 years of technology cycles

  American Express is a fast-growing technology company in Sunnyvale, CA, where Project Management and Jenkins drive everything we do. The door to every manager at American Express is genuinely open, calendar permitting and politics aside.

  For this Mobile Developer role we offer $126,000 - $184,000, a mentor who has walked the path, and benefits designed for life outside American Express.

  Recruiting for this freelance position is happening in real time, not on a backlog.

  We promise a real review, a real reply, and a real shot, so send the application.

• Required skills

  • Rust
  • Tailwind CSS
  • CI/CD
  • Redis
  • Kubernetes
  • Git
  • Ruby on Rails
  • GitHub Actions
  • Jenkins
  • Next.js
  • Project Management
  • Coaching
  • Flexibility
  • Organization

• Benefits & perks

  • Fitness class subsidies
  • Community service opportunities
  • Nap Pods
  • Auto and home insurance discounts
  • Long-term disability insurance
  • Green card sponsorship
  • Book Allowance
  • Phantom stock plan
  • Stock Options
  • Paid relocation for international moves
  • Video Games
  • Competitive base salary
  • Holiday parties
  • Recognition Programs

• Apply before 2026-08-28

  Submit your application for this Freelance technology position.