Jeferson De Freitas Pinto jefer94

Jeferson De Freitas

Designed a multi-domain architecture based on Domain-Driven Design (DDD), structuring the system into three bounded contexts (CMS, RAG, Capyschool), each composed of multiple services (frontend, backend, workers, BFF, DB), enabling decoupling and independent evolution.
Designed a DB-per-tenant architecture (Turso/LibSQL) with encrypted credential management and zero-downtime migrations, improving data isolation and query performance while ensuring compliance with SOC 2 and ISO standards.
Implemented a Specification-First model with validation gates in pull requests, enforcing mandatory architecture and business criteria approval prior to implementation, reducing technical debt and rework through a shift-left approach.
Implemented an AI-assisted versioned content pipeline and dynamic metadata system, reducing content generation time by 10x and lowering editorial team cognitive load, with a strong focus on observability and simplicity.
Designed the pricing system (plans + credits), aligning AI inference costs, payment processing fees (Stripe), and taxes, ensuring positive margins per transaction and scalability of the business model, with a focus on predictability.

Implemented an event-driven architecture (Celery, Cloud Run, Pub/Sub), decoupling time-intensive workloads, reducing latency by ~70% and increasing throughput by 5x, while improving system availability.
Designed a database auditing framework based on behavior-driven testing, detecting and correcting inconsistencies at runtime to prevent incidents and ensure system integrity and reliability.
Designed CI/CD pipelines with quality gates at commit and PR stages, integrating linters, auto-formatting, automated testing, and error/security validations to enforce quality standards across all releases.

Languages — Typescript · Python · Go · Bash
AI — RAG · MCP · LLM · Agents · Workflows · Langchain · AI SDK · Embedding Models · Semantic Search
Infrastructure — Cloudflare · Railway · Vercel · AWS · GCP · Terraform
Databases — Turso/LibSQL · PostgreSQL · Redis · BigQuery · Qdrant · Milvus
Frameworks — Hono · Django · FastAPI · Astro · React · Svelte · Next.js · Tailwind CSS · Shadcn/UI

Computer Engineering
Rómulo Gallegos National Experimental University (UNERG) | 2012 – 2017 | Venezuela