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Nicolas Kelepuris

@nicolaskelepuris

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Senior software engineer specializing in Ruby on Rails, event-driven microservices, and TDD-driven delivery on AWS.

Brazil

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What I'm looking for

I’m looking to build scalable, highly maintainable systems with event-driven architecture on AWS. I want to keep shipping robust products using TDD, clean code, and modern full-stack tools—while continuously learning and sharing knowledge.

I’m a full-stack engineer with 7+ years of experience designing, building, and shipping robust web products. I specialise in Ruby on Rails and event-driven programming, using Test-Driven Development and Clean Code practices to deliver maintainable systems.

At Nomad, I built Husky’s back-office application in Ruby on Rails with Hotwire/Turbo, improving issue-resolution speed. I also integrated Husky’s international-payments rails into the Nomad mobile app, enabling a new revenue stream.

I designed and maintained event-driven micro-services with NestJS, Amazon SQS, and SNS. In parallel, I bring a full-stack mindset—building customer-facing experiences with Hotwire (Turbo and Stimulus), and real-time updates with Action Cable (websocket).

Most recently, I built an end-to-end intelligence platform that transforms public-web signals into structured, actionable insights. I combined LLM-powered extraction with a custom data pipeline (REST/GraphQL, RSS, web crawling, ATS scraping, semantic search) and delivered the customer-facing app with Ruby on Rails.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Freelance

Jan 2024 - Jul 2025 (1 year 6 months)

Built an end-to-end intelligence platform that converts public web signals into structured hiring and investment insights. Developed a customer-facing Ruby on Rails app with Hotwire and Action Cable, plus LLM-powered extraction and embedding-based semantic search.

Ruby on Rails Hotwire (Turbo + Stimulus)Elasticsearch

Software Engineer

Rock Content

Dec 2021 - Aug 2022 (8 months)

Automated a full regression suite with Cypress, reducing manual QA time from 4+ hours to 30 minutes. Migrated a system from Web Forms to a REST API and MVC for .NET 6, refactoring for testability and reducing coupling across layers.

Cypress Unit Testing REST API Development MVC Code Refactoring

Junior Software Engineer

Stade.io

Sep 2021 - Dec 2021 (3 months)

Developed web applications using Vue.js, Node.js, and GraphQL. Delivered service logic supporting front-end and API integrations.

Vue.Js Node GraphQL Web Application Development API Integration JavaScript

Junior Software Engineer

Stade.io

Jan 2021 - Sep 2021 (8 months)

Built REST APIs using .NET Core / .NET 5. Developed mobile and web applications using Flutter and related service logic.

.NET Core REST APIs Flutter Mobile App Development Web Application Development C#

Junior Software Engineer

Atlantic Shipping

Nov 2018 - Jan 2021 (2 years 2 months)

Developed a back-office system to automate operational workflows and organize the Finance department. Built features using Ruby on Rails with PostgreSQL on AWS.

Ruby on Rails PostgreSQL AWS Back Office Systems Workflow Automation Web Application Development