Open to opportunities

Willames Campos

@willamescampos

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Senior Backend Engineer building scalable, reliable Python services across cloud and event-driven systems.

Brazil

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What I'm looking for

I’m looking for a backend role where I can own scalable Python services, build event-driven and cloud-native systems, and improve reliability and delivery speed. I want teams that value measurable impact and AI-assisted, specification-driven engineering.

I’m a Senior Backend Engineer with 5+ years building scalable, reliable, business-critical backend systems using Python, FastAPI, Django, and REST APIs. I focus on distributed systems, event-driven workflows, and cloud-native services to deliver measurable operational and delivery improvements.

I’ve supported backend platforms serving 100–10,000+ users across enterprise clients, reducing onboarding workflows from 4 hours to 5 minutes (92.5% improvement) and cutting deployment time by 67% through CI/CD improvements with GitHub Actions and Docker. I’ve also reduced recurring production incidents from 30 to 4 per month by addressing security vulnerabilities and improving service reliability.

In recent roles, I’ve worked on large-scale marketplace and financial systems, building message-driven integrations with Kafka, Google Pub/Sub, and RabbitMQ, and deploying backend applications on GCP using ArgoCD and Kubernetes. I use AI-assisted development practices with Claude AI, Cursor, OpenSpec, and agent-based workflows to improve planning, specification-driven delivery, and engineering quality, including an 83% faster notification feature development through reusable architecture and design patterns.

Experience

Work history, roles, and key accomplishments

Current

Senior Backend Engineer

Current

Luizalabs

Jan 2026 - Present (5 months)

Designed and maintained backend services for large-scale marketplace and financial systems, evolving distributed architectures and event-driven workflows. Built cloud-native applications on GCP using ArgoCD and Kubernetes, and developed message-driven integrations with Kafka, Pub/Sub, and RabbitMQ.

Python fastAPI REST APIs Event Driven Architecture Apache Kafka Google Pub Sub RabbitMQ GCP Kubernetes ArgoCD

Backend Engineer

Inspand

Jan 2025 - Jan 2026 (1 year)

Led backend architecture and scalability for a platform serving 100–10,000 users, restoring critical inter-service communication after a production incident in under 2 hours. Improved high-traffic reporting API performance by optimizing MongoDB and PostgreSQL queries and redesigned service authentication using OAuth2 and JWT.

Python Django fastAPI REST APIs Microservices MongoDB PostgreSQL OAUTH2 JWT AWS ECS

Backend Engineer

Movva

May 2022 - Jan 2025 (2 years 8 months)

Promoted to backend engineer, owning backend architecture, integrations, scalability, and reliability for notification and reporting services. Reduced notification development and testing time from 2 hours to 20 minutes (83%), fixed security vulnerabilities that reduced recurring incidents from 30 to 4 per month, and built GCP cloud-native services on Cloud Run and Firestore.

Python Django Django REST Framework fastAPI Firestore Google Cloud Storage Twilio Docker

Backend Engineer

Arbache Innovations

Mar 2020 - May 2022 (2 years 2 months)

Built and scaled core backend platform features, developing a competency assessment platform in Django and async batch processing pipelines. Delivered measurable impact by increasing new client acquisition by 40%, reducing onboarding time from 4 hours to 5 minutes for batch registration (92.5%), and cutting deployment time by 67% via improved CI/CD.