Daniel Caso Quintanilla
Backend Engineer / AI Engineer / Python Developer
Lima, PeruBackend Software Engineer — Python, FastAPI & Cloud
Who I am
Backend Software Engineer — Python, FastAPI & Cloud
Backend Software Engineer with 5+ years of experience building fast, secure, and well-documented APIs and microservices in Python/FastAPI for production SaaS platforms. I design REST and GraphQL APIs, work with relational databases and asynchronous processing, and apply Clean Architecture, SOLID, and DDD. Comfortable across the full stack, with React on the frontend.
Systems running in production
Where I worked
Backend Engineer, Integration
Kwema · Remote — Saint Louis, Missouri, USModernized backend workflows for real-time alert management, refactoring legacy systems with Clean Architecture to cut technical debt. Improved alert API response times by 95%, from 60 seconds to under 3 seconds, and built a velocity-based route segmentation engine for more contextual mobile alerts.
- Python
- FastAPI
- C#
- .NET
- GCP
- BigQuery
- SQL Server
- Claude Code
Backend Engineer
EVOLTA CRM · Hybrid — Lima, PeruMigrated a legacy monolith toward a service-oriented architecture for a real-estate CRM platform, without disrupting production. Refactored modules with Clean Architecture to cut technical debt, built new backend features for sales tracking and document automation, and contributed end-to-end to the Angular frontend.
- Python
- FastAPI
- Microsoft SQL Server
- PostgreSQL
- TypeScript
- Angular
- Bitbucket
- JIRA
Backend Engineer
LLATAN · Lima, PerúBuilt APIs with Python (FastAPI) using SQLAlchemy on PostgreSQL, and integrated Redis for caching and session performance. Applied Clean Architecture to modularize the codebase, improved functional test coverage, implemented payment integrations with webhook-based confirmations, and integrated DocuSign for verifiable electronic signatures.
- Python
- FastApi
- React
- Git
- Gitlab
- Docker
- Kubernetes
- Terraform
Backend Engineer
Fide PBC · Remote — Madrid, SpainDeveloped and optimized backend microservices in Python, Java, and TypeScript for high-traffic, KPI-driven systems. Improved API responsiveness with asynchronous methods, managed reliable async communication via Kafka and RabbitMQ, and designed high-performance SQL and NoSQL queries.
- Python
- Java
- TypeScript
- Django
- Django REST Framework
- FastAPI
- Spring Boot
- WebFlux