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Sr Ruby on Rails Engineer

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Onsite

Sr Ruby on Rails Engineer

W3Global

Sr Ruby on Rails Engineer

Skills

Ruby on RailsRubyPostgreSQLMySQLCompliance

2 months ago

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Important information


Contract type:

Freelance / Contract

Location:

Mexico City, CDMX, Mexico

Work mode:

Onsite

Published on:

12 August 2026

What they need


Job Title: Sr Ruby on Rails Engineer Locations: Mexico- Remote Skill Set: Ruby on Rails, PostgreSQL, sidekiq, RESTful APIs, HTML/CSS Minimum Experience: Above 4+ Years Job Description About the Role We're looking for a Ruby on Rails engineer to own the migration of our system integration from V1 directly to V3. This is a mandated upgrade that transitions our integration from a synchronous, batch-polling model to a fully asynchronous architecture using Individual Callback Notifications. You'll implement both the legacy V2 data-contract changes (which we're skipping as a standalone release) and the new V3 async framework.

What You'll Do

  • API Migration & Data Contract Retrofitting - Implement V2 data-gap changes including mandatory country codes, SSN→national Id field renaming across all PII endpoints, culture code enforcement, input regex sanitation, and optional external reference ID mapping.
  • Asynchronous Architecture - Build the V3 Long Running Search Support framework with individual report webhook callbacks and landlord attestation integration.
  • UI/UX & Compliance - Develop an async dashboard, disclaimer modals for Identity/Income reports, renter-visibility restrictions, and HTML doctype rendering.
  • Cutover Execution - Participate in staging validation, Deploy Night execution, and Register API + Notifications migration.

What We're Looking For

Required

  • 4+ years of professional experience with Ruby on Rails
  • Strong experience building and consuming RESTful APIs and working with third-party API integrations (especially financial or identity services)
  • Solid understanding of asynchronous architectures - webhooks, callbacks, event-driven patterns
  • Experience with server-to-server authentication (OAuth, token-based auth, MFA/multi-key rotation)
  • Working knowledge of TLS/HTTPS, IP whitelisting, and secure data handling for PII
  • Familiarity with data migration strategies - versioned API contracts, backwards compatibility, and cutover planning
  • Comfort working with relational databases (PostgreSQL or MySQL) and writing performant queries

Preferred

  • Experience with credit bureau, or financial services APIs (TransUnion, Experian, etc.)
  • Background in property management / PropTech platforms
  • Exposure to webhook endpoint design and idempotent event processing
  • Experience with staging/production deployment workflows and zero-downtime migrations
  • Familiarity with compliance requirements around consumer credit data (FCRA, data privacy)

Tech Stack

  • Ruby on Rails
  • RESTful / Webhook-based APIs
  • PostgreSQL
  • Background job processing (Sidekiq or similar)
  • TLS 1.2 / Token-based authentication
  • HTML/CSS (for compliance UI modals and dashboard rendering)

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