Open to opportunities

Sleyder Zuleta

@sleyderzuleta

Message

I build scalable full-stack platforms, AI systems, and cost-efficient cloud infrastructure.

Colombia

Message

What I'm looking for

I'm looking for opportunities where I can build and modernize backend and platform systems, ship practical AI-powered features, and lead teams toward clean, well-tested, cost-efficient software.

I've built and modernized full-stack platforms for MyCase/8am, Skydropx, PICAP, and fintech clients, with 11 years of experience across Ruby on Rails, React, Java/Spring Boot, Node.js, and cloud infrastructure.

At MyCase/8am, I help evolve high-volume legal document workflows on AWS and build AI-enabled tooling using LangGraph, Gemini, GPT, Claude, NestJS, and MCP. I've also built Lexical-based document editors, document migration microservices, and React interfaces using GraphQL, Apollo, and TanStack Query.

At Skydropx, I modernized a legacy Rails application to Rails 7, migrated background processing to Solid Queue, introduced Kafka-based communication, and reduced cache infrastructure costs by roughly four times with Solid Cache.

As Technical Leader and Architect at PICAP, I led 15 engineers across planning, technical direction, mentoring, hiring, and architecture. I also build and operate Muzarellas' internal POS, delivery, invoicing, AI automation, and WhatsApp ordering platforms with Rails, React, LangGraph, Docker, and DigitalOcean.

Experience

Work history, roles, and key accomplishments

Current

Sr Full Stack Developer

Current

MyCase / 8am

May 2025 - Present (1 year 3 months)

Supported and evolved asynchronous job processing with AWS SQS and Shoryuken across high-volume document workflows. Helped design and build a multi-agent AI development system integrated with Jira, and modernized the legal document template platform with API integrations to Gemini, GPT and Claude.

Ruby on Rails React TypeScript GraphQL Apollo Tanstack Query NestJS LangGraph Claude GPT Gemini MCP Lexical AWS S3 Lambda IAM Shoryuken Docker

Sr Full Stack Developer

Skydropx

Jul 2023 - May 2025 (1 year 10 months)

Led the modernization of a legacy Rails system to Rails 7, delivering 100% tested code enforced with Rubocop. Migrated background processing to Solid Queue and rebuilt the frontend layer with Turbo Streams, ViewComponents and real-time updates over ActionCable WebSockets.

Solid Queue Turbo Streams ViewComponent ActionCable Kafka Express PostgreSQL RuboCop RSpec GitHub Actions

Technical Leader / Architect

PICAP

Jun 2020 - Jul 2023 (3 years 1 month)

Led a team of 15 engineers, owning project planning and execution, technical direction, code reviews, mentoring, career development and hiring. Designed and implemented an infrastructure provisioning system with Terraform, Helm and EKS, and owned architecture and performance across Heroku, EKS and DigitalOcean.

Ruby on Rails Terraform Helm Kubernetes PostgreSQL RSpec Capybara Selenium New Relic Grafana CircleCi Airbrake GitHub Actions Scrum

Backend Developer

PICAP

Sep 2019 - Jun 2020 (9 months)

Led development of payment, recharge and purchase features, including third-party integrations. Supported B2B and B2C integrations working with customer service, financial and marketing teams, and monitored database performance and conducted data analysis.

Ruby on Rails React Webpacker Snowflake MongoDB Redis

Full Stack Developer

Allcode S.A.S

Apr 2015 - Sep 2019 (4 years 5 months)

Developed portfolio and debt management systems, payment gateways and file management platforms for fintech clients. Spearheaded migration of Java architectures to Node.js for document management and REST API communication, implementing asynchronous process handling.

Ruby on Rails Java Spring Boot Node React AWS Azure PostgreSQL MySQL Docker SQL Server

Founder & Software Engineer

Muzarellas SAS

Designed and built scalable, very low-cost internal tooling that removed the business dependency on third-party POS and accounting systems. Built a full POS platform with Rails 8 and React for payroll, orders, products, inventory and electronic invoicing, integrated with the Colombian government tax authority (DIAN) departmental system.