Open to opportunities

leonel gracia

@leonelgracia

Senior software developer with 6+ years building Ruby/Rails applications end-to-end, improving performance and reducing costs.

Colombia

Message

What I'm looking for

I’m looking for a team where I can own backend engineering end-to-end—shipping reliable features, improving performance, and reducing costs through microservices, strong tests, and clean APIs.

I’m a Senior Software Developer with 6+ years participating in the complete product development life cycle of successfully launched applications. I’m eager to help companies grow by reducing costs and improving application performance through stable, secure, and well-designed engineering.

At Encora, I’ve worked on projects like Stessa, fixing bugs and improving stability, redesigning workflows, integrating Argyle, and adding/maintaining GraphQL endpoints. Previously at Endava and other teams, I migrated monoliths to microservices, improved database query performance, built shared gems and integrations, and delivered features with Ruby on Rails, Go, PHP, and event-driven patterns—often focusing on measurable performance improvements.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Developer

Current

Encora

Feb 2025 - Present (1 year 4 months)

Delivered features for Stessa’s landlord dashboard, including bug fixes, stability improvements, and a redesigned tenant screening flow. Implemented and maintained GraphQL endpoints, integrated Argyle for employment/income verification, and upgraded Ruby/Rails versions for security, performance, and maintainability.

GraphQL Ruby on Rails Ruby PostgreSQL ReactJS API Integration Argyle Integration Performance & Security Upgrades

Senior Software Developer

Endava

Dec 2020 - Jan 2025 (4 years 1 month)

Led development across multiple Endava client projects, including building reusable Ruby gems for authentication, errors, requests, and pagination to enable vendor integrations. Added testing and platform features such as Cypress end-to-end tests, admin capabilities, analytics-oriented data transformations, and API/service improvements in Ruby, PHP, Go, and Java.

Ruby Ruby on Rails GraphQL PostgreSQL MySQL Java PHP Go Cypress

Senior Software Developer

Youtoo-Project

Sep 2023 - Apr 2024 (7 months)

Supported bug fixes and small feature development for Pummaker’s internal platform used to generate student quotations. Designed an architecture to migrate a PHP monolith to microservices and improved database query performance and code quality.

PHP gRPC MySQL Redis Microservices Backend Engineering API Development

Software Developer

Zinobe

Aug 2020 - Nov 2020 (3 months)

Migrated a monolithic web application to microservices and implemented Elasticsearch in a key microservice. Built plain Ruby async workers to support background processing and improved response times for certain queries by 80%, based on the reported performance gains.

Ruby Microservices Elasticsearch PostgreSQL MongoDB Performance Optimization Data Indexing

Software Developer

Belatrix

Aug 2019 - May 2020 (9 months)

Refactored Yello’s codebase by separating business logic into reusable Ruby gems and moving private endpoints to GraphQL. Contributed to search and persistence layers using Elasticsearch and multiple databases to support hiring workflow features.

Ruby on Rails Ruby GraphQL Elasticsearch PostgreSQL MongoDB API Development

Senior Developer

CNPX

Apr 2019 - Aug 2019 (4 months)

Owned backend work for the SOAT Payment microservice, finishing the backend API and supporting the RUNT integration to classify vehicles and generate totals to pay. Helped advance SOAT as the first completed company service for market entry.

Ruby ReactJS Microservices Backend Services Jenkins RabbitMQ Redis RUNT Integration

Tech Lead

Making Apps

Jun 2018 - Mar 2019 (9 months)

Provided technical leadership on SaaS and travel platforms, redefining architecture and database schemas and implementing multitenancy with separate schemas to improve performance. Built and shipped backend services (including Go and Rails admin APIs) and supported deployment configuration on AWS EC2.

Go Ruby on Rails PostgreSQL Redis GraphQL AWS EC2 API Development Schema Design

Software Developer

Appmeup

Feb 2015 - Nov 2017 (2 years 9 months)

Built a Ruby Sinatra proxy to translate mobile SOAP integrations into REST APIs, enabling reliable communication with external SOAP services. Developed React Native features and supported AWS-backed media processing and configuration for user sharing and playback across mobile platforms.

Ruby Sinatra SOA Integration React Native MongoDB AWS Redis Mobile App Development