Yafet Y.

I'm a backend engineer building scalable, real-time systems across fintech, gaming, and e-commerce: from multiplayer game backends and trading/market analytics tools to payment processing and API integrations (Amazon Ads & SP-API, third-party platforms, and more). ✅ What I Bring to the Table E-Commerce Backends Implemented core systems for online platforms: catalog services, checkout workflows, inventory syncing, and transactional APIs optimized for scale and uptime. Amazon Ads & SP API Integration Integrated Amazon Selling Partner (SP) APIs and Amazon Ads APIs to power custom ad reporting, campaign automation, and seller analytics dashboards built with performance and compliance in mind. Secure Payment & Transaction Systems Developed payment processing flows with MPGS, Visa, and other gateways, featuring encrypted data handling, validation layers, and detailed transaction logging. Real-Time & Market Analytics Built custom trading screeners, signal engines, and live market data pipelines that turn raw exchange/API data into decision-ready systems, plus WebSocket and gRPC-powered multiplayer game backends handling high concurrency with low latency. AWS & Cloud Infrastructure Deployed and managed services on AWS using EC2, ECS, Lambda, S3, and RDS, with Terraform and Docker for infrastructure-as-code and containerized microservices. CI/CD & DevOps Automation Built CI/CD pipelines with GitLab CI, GitHub Actions, and Drone to automate testing, deployment, and delivery workflows. Monitoring & Observability Set up metrics, logs, and tracing across distributed systems using Prometheus, Grafana, Loki, ELK Stack, and Jaeger, ensuring real-time visibility and stability. 🛠️ Tech Stack Languages & Frameworks Golang · Node.js · Express · HTMX · Alpine.js · Tailwind Cloud & Infrastructure AWS · GCP · Kubernetes · Terraform · Temporal Databases PostgreSQL · MongoDB · Redis · DynamoDB Messaging & Observability NATS · Prometheus · Grafana · Loki · Jaeger · ELK Stack APIs & Platforms Amazon SP API · Amazon Ads API · MPGS · Visa · REST · WebSocket Workflow Automation n8n for low-code system integration, business logic automation, and third-party API orchestration 💼 Let's Work Together Whether it's scaling an e-commerce platform, integrating payment systems, building a real-time API, or working with Amazon SP/Ads APIs, I bring production-ready solutions built for speed, security, and scale.