Software Engineer · Developer · Solutions Architect / Ecuador · Spanish (native) · English (B2+)

I build reliable, scalable systems—from event‑driven backends and microservices to cloud architectures and frontends. I enjoy turning complex problems into clean designs and production‑ready code.

personal-portfolio — showcase of highlighted projects and recent learning.

jeffersonleon — I write about software architecture, distributed systems, and cloud-native development.

• 👨‍💻 Experience: 9 years across fintech, telecom, and SaaS
• 🏗️ Architecture: microservices, event-driven, hexagonal, DDD, SOA (with pragmatic trade-offs)
• ☁️ Cloud: AWS (DynamoDB, S3, SQS/SNS, Lambda, Aurora, EC2/ECS)
• 🧪 Quality: CI/CD, pipelines (GitLab/GitHub), code quality, observability
• 🤝 Team: I value clarity, docs, feedback loops, and pragmatic delivery
• 🧪 Fun fact: I love performance, optimization, and being a bit of a mad scientist with new tech ⚗️

• Backend & APIs: Node.js/TypeScript, PHP/Laravel, Java/Spring Boot
• Frontend & Mobile: React, Next.js, Angular, React Native
• Data: PostgreSQL, Oracle, MySQL, DynamoDB; messaging with Kafka & gRPC/REST
• Ops: Docker, Docker Swarm, Nginx, SonarQube, GitLab CI/CD
• Patterns: idempotency, outbox/inbox, retries, circuit breakers, SAGA

Languages: TypeScript · JavaScript · PHP · Java · SQL · Rust (learning)

Frameworks: Spring Boot · Laravel · React · Next.js · Angular

Infra/Cloud: AWS · Docker · Nginx · GitLab/GitHub Actions · Kafka

Databases: PostgreSQL · Oracle · MySQL · DynamoDB · Aurora

I document production-style architecture scenarios with C4 diagrams, ADRs, IaC blueprints, SLO dashboards, and performance/chaos drills. The repo links out to the reference apps; this space focuses on the documentation and diagrams.

• Repo: https://github.com/JeffSkynird/architecture-labs

A selection of things I’m proud of. More in the pinned repos.

• ddd-hexagonal-microservices — Microservices project with Laravel & React, using event-driven messaging (RabbitMQ) with DDD & Hexagonal patterns.

  Laravel · React · RabbitMQ · DDD · Hexagonal Architecture

• abac-platform — End-to-end authorization platform for fine-grained access control using the Cedar policy language. This monorepo includes a high-performance Rust PDP, a NestJS Admin API, and an Astro/React dashboard for managing policies, tenants, and entities, with Envoy ext_authz integration.

  NestJS · Astro · React · NodeJS · Rust · Cedar · Envoy · Keycloak

• cqrs-ordering-service — Order Service implementing CQRS + Event Sourcing with SQLite projections + DDD, Outbox dispatcher, Prometheus metrics (/metrics), k6 load tests, and Docker-friendly local setup.

  NestJS · TypeScript · CQRS · Event Sourcing · SQLite · Prometheus

• hls-video-platform — HLS streaming with transcoding, search, analytics.

  NestJS · TypeScript · FFmpeg · MinIO · RabbitMQ · Meilisearch · ClickHouse · Nginx

• secure-llm-gateway — Provider‑agnostic gateway with quotas, rate limiting, SSE, and privacy controls.

  Rust · Axum · Redis · OpenTelemetry

• port-warden — Cross‑platform tray app to manage dev ports & Docker; smart kill, profiles, CPU/RAM alerts.

  Rust · CLI/Tray · sysinfo · bollard

Repos:

• https://github.com/JeffSkynird/event-driven-ddd-hexagonal-laravel-react
• https://github.com/JeffSkynird/abac-platform
• https://github.com/JeffSkynird/cqrs-ordering-service
• https://github.com/JeffSkynird/hls-video-platform
• https://github.com/JeffSkynird/secure-llm-gateway
• https://github.com/JeffSkynird/port-warden

• Alegra — Backend Engineer (2025) PHP/Laravel → Node.js microservices migration; event-driven with Kafka/SNS/SQS; serverless with Lambda; data on Aurora & DynamoDB; DDD & hexagonal.

  Node.js · Laravel · Serverless · Kafka · ECS · EC2 · S3 · SQS · SNS · AWS Lambda · Aurora · DynamoDB

• ConsulTI / Telconet — Full-stack (2022–2024) Angular + Spring Boot microservices; Docker/Swarm; Oracle & PostgreSQL; Kafka; Agile/SCRUM; CI/CD with Git & pipelines.

  Spring Boot · Angular · gRPC · Docker Swarm · Kafka · Oracle · PostgreSQL

• Ambiensa — Full-stack Developer (2021) Defined enterprise architecture and modernization roadmap (CRM & sales flows): API-first decoupling, events for integrations, quality standards (versioning, contracts), security/governance, and stakeholder alignment.

  Architecture · APIs · React · Laravel · React Native · AWS Textract · EC2 · Performance Testing

• Austrosoft Cia. Ltda. — Full-stack Developer (2020) E-invoicing and accounting system using React for the frontend, Laravel for the backend, and a MySQL database.

  React · Laravel · MySQL · E-invoicing

• Interbytes — Full-stack Developer (2017–2019) ISP client management system using React & Laravel; handled internet plans, router connections, and network traceability with PostgreSQL.

  React · Laravel · PostgreSQL · Networking

• AWS Solutions Architect – Associate (2025)
  
• SOA Microservices Architect — Arcitura (2024)
  
• SOA Professional & Microservices — Arcitura (2024)
  
• B.S. in Systems Engineering — Universidad Técnica de Machala (2013–2019)