Senior Full-Stack Engineer Rails, Python, Cloud + DevOps

PABLO MARENGO CAFARO

Senior Telecommunications Engineer Full Stack Developer Ruby on Rails & Python/Django Specialist

Tel: +1-347-***-**** Email: ******************@*****.***

PROFESSIONAL PROFILE

Senior Engineer with over 10 years of experience combining full-stack software development in Ruby on Rails with technology infrastructure management. Specialist in building scalable web applications, API integration, MVC architecture, process automation, and cloud deployment (AWS, Azure, Google Cloud). Extensive experience leading development teams, designing secure solutions, and optimizing critical systems in high-demand environments.

CORE COMPETENCIES

• Web & Software Development: Ruby on Rails, Python/Django, JavaScript (React, Vue), SQL/MySQL/PostgreSQL, REST/SOAP

• Architecture: MVC, microservices, APIs, third-party integrations

• DevOps & Cloud: AWS, Azure, Google Cloud, Docker, CI/CD (GitHub Actions, Jenkins)

• Automation: Ansible, Puppet, Chef

• Security: SSL/TLS, Zero Trust, firewalls, OAuth2, DevSecOps

• Agile Methodologies: Scrum, Kanban, TDD/BDD

PROFESSIONAL EXPERIENCE

Citibank – New York, NY Senior IT Engineer / Ruby on Rails Developer Mar 2017 – Present

• Developed internal Ruby on Rails applications for network monitoring, incident management, and task automation.

• Designed reusable modules and APIs for integration with Cisco ACI, VMware, and perimeter security systems.

• Migrated legacy applications to Rails 6, improving both performance and security.

• Implemented automated tests (RSpec, Capybara) achieving 92% code coverage.

• Coordinated a 5-developer Scrum team.

Cyberlinetechnology – New York, NY Python/Ruby Developer & Network Automation Specialist Jul 2016 – Jan 2017

• Created a Rails-based platform for device inventory and configuration management.

• Integrated OAuth2 authentication and an administrative panel using ActiveAdmin.

• Deployed solutions on AWS with load balancing and automated backups.

• Optimized SQL queries, reducing response times by 40%.

Mavencommerce Inc. – New York, NY Telecommunications Engineer / Ruby Developer Apr 2015 – Jun 2016

• Developed Rails scripts and applications to automate technical support and incident tracking processes.

• Implemented real-time notification systems using ActionCable and Redis.

SELECTED RUBY ON RAILS PROJECTS

• Internal Network Management System – Citibank: Web platform for managing and monitoring critical devices in real time; integrated with Cisco ACI and VMware APIs.

• Inventory & Configuration Platform – Cyberlinetechnology: Rails application with SQL database for inventory and version control.

• Traffic Monitoring & Alert Portal: Rails dashboard with WebSockets and Chart.js, email and Slack notifications.

• Internal Ticket Management System: Rails + PostgreSQL system for SLA control and automatic task assignment.

• Multi-Store E-commerce: Rails + Stripe/PayPal, analytics, and user roles.

• Trello-Style Project Manager: Kanban, chat, and integrations with Google Drive and Slack.

• LMS Platform: Courses, certificates, Zoom integration, and AWS S3 storage.

• Booking System: Prepaid payments, availability management, and reporting.

• Thematic Social Network: Profiles, messaging, and social login.

• Personal Finance App: Budgets, reports, and bank import.

• Recruitment Portal: Automated candidate-vacancy matching.

• SME CRM: Sales pipeline and email marketing.

• Online Auction Platform: Real-time bidding and integrated payments.

EDUCATION & CERTIFICATIONS

• Telecommunications Engineering – University of Pisa, Italy

• CCNA Routing and Switching – Cisco (2016–2018)

• Certifications: CCNA Cisco (2017), Python (2019), Ruby (2018)

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