Alberto Llanos

Backend Developer | Python, Django, AWS Serverless

📧 alberto.llanosco@gmail.com 🔗 linkedin.com/in/alberto-llanos 🐙 github.com/allanos94 📍 Medellín, Colombia

Summary

Software Developer with 4+ years building secure, high-performance backends using Python/Django, serverless architectures on AWS, and modern APIs. Proven track record improving latency, reducing costs and cutting MTTR through observability and CI/CD best practices. Comfortable across the stack (DRF/FastAPI + React/Next.js).

Key Achievements

API Performance: Reduced p95 latency by 40% with query optimization, caching and pagination.
Cost Optimization: Cut AWS compute costs by 30% migrating to serverless (Lambda, API Gateway).
Reliability: Decreased MTTR by 35% implementing monitoring, alerts and distributed tracing.
Security: Delivered JWT + RBAC auth for multi-tenant SaaS, handling 10k+ concurrent users.
Scale: Built event-driven pipelines processing 1M+ events/day with SQS, SNS and DynamoDB.

Featured Projects

Clout Fantasy — Backend Developer

Django, PostgreSQL, DRF

Impact: API performance +50%, secure auth for 10k+ users

Apptenticate — Backend Developer

Django, Multi-tenant, RBAC

Impact: SaaS auth with admin tooling

AWS Serverless — Various projects

Lambda, API Gateway, S3, RDS

Impact: Cost −30%, latency −40%

E-commerce Headless — Backend Developer

FastAPI, PostgreSQL, Redis

Impact: High-throughput APIs with caching

Tech Stack

Backend: Python, Django, DRF, FastAPI, PostgreSQL, Redis
Cloud/DevOps: AWS (Lambda, API Gateway, S3, RDS, DynamoDB, SQS, SNS), Docker, CI/CD, Terraform
Frontend: JavaScript, TypeScript, React, Next.js
Practices: TDD, REST APIs, Observability, Microservices, Event-driven architecture

Experience Highlights

Darien Technology (Jan 2024 – Present) — Backend Developer: Core product APIs, deployment automation, security hardening.
Aldea Media (Aug 2023 – Jan 2024) — Freelance Backend: Media workflows, JWT auth, query optimization.
Rebus Innovation Technology (Jun 2022 – Jan 2024) — Backend Developer: 5+ products shipped, monitoring & tracing.
Sol4IT (Jan 2022 – Jun 2022) — Oracle NetSuite Consultant: API services & data sync automation.