C

Cesar Alberto Gomez Carrillo

About

Detail

Senior Ruby on Rails Engineer | Distributed Systems | Kafka, AWS | Scaling SaaS Platforms
Villa de Álvarez, Colima, Mexico
Contact Cesar regarding: 
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Full-time jobs
Starting at USD48/hour
Flexible work
Starting at USD50/hour
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Timeline

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school
Education
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Project

Résumé

Jobs verified_user 0% verified
  • S
    Technical Lead
    SchoolStatus
    Jan 2023 - Current (3 years 4 months)
    Led the design and evolution of a multi-channel communication platform (SMS, voice) used by thousands of teachers and parents; built with Kafka, Rails, and distributed services. Scaled SMS throughput from 1,200/min → 20,000/min via Kafka queues and Karafka gem. Upgraded a critical legacy Rails system and integrated it into the new Kafka architecture. Reduced onboarding from days to hours by automating A2P 10DLC, campaign registration, and Twilio/Bandwidth workflows using Rails. Built a Nest.js data ingestion pipeline (DB, SFTP, CSV) syncing district staff across products. Created a production-like Docker environment simulating service communication and Kafka brokers. Raised legacy coverage from 0% → 75% and enforced 90%+ coverage on new Rai
  • Donorbox
    Senior Software Engineer
    Donorbox
    Jan 2022 - Jan 2023 (1 year 1 month)
    Developed a cross-device donation widget using Web Components and vanilla JavaScript. Integrated Stripe and PayPal with currency- and country-aware routing. Replaced flaky system tests with Cuprite and strengthened the backend test suite for the Rails API.
  • S
    Senior Software Engineer
    Stadium Goods
    Jan 2021 - Jan 2022 (1 year 1 month)
    Implemented ElasticSearch for high-traffic search and catalog flows, reducing DB load in the Rails API. Shipped the company's first Rails Engine to establish clean domain boundaries. Built an ETL pipeline for third-party order synchronization, improving data reliability. Migrated Webpacker → Importmaps, simplifying builds and deployments. Improved GitLab CI by removing redundant tests and increasing parallelization. Built real-time features using Rails features like Hotwire and ActionCable.
  • Curacubby
    Senior Ruby on Rails Engineer
    Curacubby
    Jan 2020 - Jan 2021 (1 year 1 month)
    Increased test coverage from 60% → 86% across billing and enrollment systems. Upgraded Rails 4 → Rails 6 and improved performance and tooling. Added parallel tests, static analysis, and CI optimizations. Built dashboards and modular Rails Engines.
  • Kueski
    Senior Ruby on Rails Engineer
    Kueski
    Jan 2019 - Jan 2020 (1 year 1 month)
    Built a risk-scoring microservice improving fraud detection accuracy. Integrated scoring with core apps using strong API contracts. Improved documentation and engineering standards.
  • m
    Senior Ruby on Rails Engineer
    michelada.io
    Jan 2019 - Jan 2021 (2 years 1 month)
    Delivered features and improved systems across multiple client products. Refactored legacy systems and modernized Rails versions and frontend tooling. Enhanced CI reliability and introduced consistent engineering standards.
  • P
    Ruby on Rails Engineer
    Prepaid2cash
    Jan 2017 - Jan 2019 (2 years 1 month)
    Led backend development for a prepaid card processing platform. Integrated Sift for fraud detection, reducing false positives. Built features while reducing technical debt. Collaborated with cross-functional teams to improve workflows.
  • O
    Ruby on Rails Engineer
    Orbridge
    Jan 2013 - Jan 2016 (3 years 1 month)
    Migrated Rails 3 → Rails 4, improving performance and stability. Moved infrastructure from Rackspace → AWS. Implemented monitoring, logging, and automated backups. Produced documentation and architectural guidelines for teams.
  • T
    Ruby on Rails Engineer
    TangoSource
    Jan 2013 - Jan 2018 (5 years 1 month)
    Promoted from Junior → Mid → Senior; led multiple client projects. Modernized architecture and introduced engineering standards for Rails. Built CI/CD pipelines, monitoring tools, and performance improvements.
Education verified_user 0% verified
  • Instituto Tecnológico de Colima
    Software Engineering bachelor's degree
    Instituto Tecnológico de Colima
    Jan 2007 - Dec 2012 (6 years)
Projects (professional or personal) verified_user 0% verified
  • C
    Curacubby
    Jan 2020 - Jan 2021 (1 year 1 month)
    Client Project: Increased test coverage from 60% → 86% across billing and enrollment systems. Upgraded Rails 4 → Rails 6 and improved performance and tooling. Added parallel tests, static analysis, and CI optimizations. Built dashboards and modular Rails Engines.
  • K
    Kueski
    Jan 2019 - Jan 2020 (1 year 1 month)
    Client Project: Built a risk-scoring microservice improving fraud detection accuracy. Integrated scoring with core apps using strong API contracts. Improved documentation and engineering standards.
  • P
    Prepaid2Cash
    Jan 2017 - Jan 2019 (2 years 1 month)
    Client Project: Led backend development for a prepaid card processing platform. Integrated Sift for fraud detection, reducing false positives. Built features while reducing technical debt. Collaborated with cross-functional teams to improve workflows.
  • O
    Orbridge
    Jan 2013 - Jan 2016 (3 years 1 month)
    Client Project: Migrated Rails 3 → Rails 4, improving performance and stability. Moved infrastructure from Rackspace → AWS. Implemented monitoring, logging, and automated backups. Produced documentation and architectural guidelines for teams.