Sergio Marquez
Blockchain DeveloperAI is analyzing your overall score…
Identifying your key strengths…
Evaluating your skill match against the job requirements…
Assessing your cultural and operational fit
AI is analyzing your overall score…
Identifying your key strengths…
Evaluating your skill match against the job requirements…
Assessing your cultural and operational fit
Senior Product Engineer (Ruby on Rails) | Education Platforms | SaaS Systems
Senior Ruby on Rails Engineer focused on building backend systems for real-world products. I currently work at KaiPod Learning, contributing to a platform that enables educators to launch and operate microschools — small, personalized learning communities. The system acts as an operating layer connecting educators, families, and students across multiple organizations. My work centers on designing and maintaining reliable systems that support operational workflows such as enrollment, billing, and communication. Experience includes: Building multi-tenant SaaS platforms Designing asynchronous workflows and background processing (Sidekiq) Improving performance in data-heavy applications (ActiveRecord, PostgreSQL) Working across the stack with Rails, Hotwire, and Tailwind CSS I also use AI tools (e.g., Claude, GPT) to improve development workflows, debugging, and prototyping. Interested in connecting around Rails, system design, and building products that operate at scale.
Universidad Tecnológica Nacional
Bachelor of Science, Computer Science
July 1, 2009 – December 1, 2014
KaiPod Learning
Senior Product Engineer (Ruby on Rails)
May 1, 2024 – Present
Boston, Massachusetts, United States · Remote
Decisiv, Inc.
Lead Software Engineer
August 1, 2021 – May 1, 2024
Glen Allen, Virginia, United States · Remote
Decisiv, Inc.
Ruby on Rails Engineer
July 1, 2017 – August 1, 2021
Glen Allen, Virginia, United States · Remote
Paper Kite Ltd (PaperKite)
Ruby on Rails Engineer
May 1, 2016 – May 1, 2017
Wellington, Wellington, New Zealand · On-site
ThinkCERCA
Ruby on Rails Engineer
February 1, 2015 – April 1, 2016
Chicago, Illinois, United States · Remote
Spark Digital (Acquired by Intive)
Mid Senior Ruby on Rails Engineer
June 1, 2013 – February 1, 2015
Mar del Plata, Buenos Aires Province, Argentina · On-site
Cultural Fit Analysis
The candidate has a long history with Ruby on Rails, demonstrating consistency and depth in a specific technology stack. While their experience is extensive, the projects and roles are heavily concentrated in Ruby on Rails backend development. The target role is 'Blockchain Developer', which is a significant pivot from their primary skill set. This indicates a low cultural fit for the target role without significant upskilling or a demonstrated interest in blockchain technology not present in the resume. The diversity of projects is limited to web application development within the Ruby ecosystem.
Soft Skills & Operational Fit
The candidate's experience as a Lead Software Engineer at Decisiv, Inc. suggests strong leadership, team collaboration, and project management skills. Their work on optimizing CI/CD workflows indicates a focus on operational efficiency. The description of 'quickly absorbed skills' and managing a customer's project at Spark Digital points to adaptability and rapid professional growth. However, there is no direct evidence of stress handling or specific work attitude from the provided data.