Currently building at Peekerton
Joinville, Brazil ·

Jefferson Silva Caires.

Currently —Full-Stack Developer

I build practical, cloud-native software — full-stack apps, serverless APIs, and applied AI systems.

Get in touchRead the blog
00 Index · About

Pragmatic engineering
measured, typed and tested.

Full-Stack professional with experience in Front-end (React, Vue, Astro), Back-end (Node.js, Python), databases (PostgreSQL, MySQL) and Cloud (AWS & GCP).

I ship alongside learning — iterating in communities and events to stay sharp on the practices that actually matter in production.

The goal is simple: build things that solve real problems and make the systems around them quieter, faster, and easier to operate.

01Index · Selected work

Projects.

GoldenPark — Pet Tag

Live product · 2025

Pet identification via QR code. Physical tags link to digital profiles with public contact and an admin panel for owners.

Vue.jsTailwindDaisyUIPostgreSQLPythonDjangoDockerNginxAWS EC2CloudFrontRoute53S3
Watch demo

Extractor — Invoice API

Serverless · 2025

A Python serverless API that extracts and structures data from Brazilian electronic invoices (NF-e) using OCR.

PythonAWS LambdaTextractBedrockAPI GatewayS3Docker
Source

Themis — Legal Chatbot

Applied AI · 2025

A legal chatbot using retrieval-augmented generation over a document corpus, deployed on AWS with a Telegram front door.

PythonRAGLangChainTelegram APIAWS EC2TranscribeBedrock
Source

Mikael — LeRobot

Hardware / CV · 2024

A robotic hand that plays UNO — computer vision pipeline recognizes cards and drives motor control.

YOLOOpenCVPythonLeRobot
Source

Portfolio / Blog

Personal · 2024

Personal site for projects and notes — static, i18n-enabled, deployed via CloudFront. Designed with Claude Design.

AstroTailwindi18nTypeScriptAWS S3Route53CloudFrontClaude Design
Source
More —github.com/JeffSSC
02 Index · Experience

Where I've shipped.

  1. 2026 → Now Ongoing

    Peekerton

    Full-Stack Developer · Remote
    • 01 Built a Python Circuit Breaker using Chain of Responsibility with typed generics (ParamSpec/TypeVar) and Redis-backed state — upstream failures fail fast and recover via probes.
    • 02 Re-architected monolithic CI into decoupled ci.yml (run tests) + build.yml on Github Actions.
    • 03 Shipped ephemeral environments on-demand GCP managed-compute.
    • 04 Built a Playwright E2E suite from scratch (Page Object Model).
    • 05 Shipped a PR Reviewer with Claude Code Actions and GitHub MCP with severity-tagged findings and autonomous Approve / Request-Changes decisions.
    • 06 Bootstrapped a shared React + TypeScript component library — bare esbuild build, pnpm, publint + arethetypeswrong gating.
  2. 2025 6 months

    Compass UOL

    AI Intern · Remote
    • 01 Agile delivery in Scrum/Kanban; Jira for tracking and planning.
    • 02 Built a Legal Chatbot with Generative AI — LangChain, RAG, AWS Bedrock.
    • 03 Shipped a Serverless API in Python (AWS Lambda) for automated OCR on invoices.
    • 04 Standardized dev and prod environments with Docker.
  3. 2024 6 months

    Informatech

    IT Intern · On-site
    • 01 Setup and on-site deployment of workstations at client sites.
    • 02 Preventive & corrective hardware maintenance: diagnosis, replacements, upgrades.
    • 03 L1 support focused on software and networking.
    • 04 Inventory and peripheral asset control.
03 Index · Stack

Tools of the trade.

Main stack
PythonFastAPINext.jsTypeScriptPostgreSQLGCPAWSDocker
Experience with
Vue.jsReactDjangoNode.jsRedisPlaywrightpytestGitHub ActionsTailwindAstroLinux
Certifications
AWS
AWS AI Practitioner
Amazon Web Services · AIF-C01 · 2025
AWS
AWS Cloud Practitioner
Amazon Web Services · CLF-C02 · 2024
Python ◆ FastAPI ◆ Next.js ◆ TypeScript ◆ PostgreSQL ◆ GCP ◆ AWS ◆ Docker ◆ Vue.js ◆ React ◆ Django ◆ Node.js ◆ Redis ◆ Playwright ◆ pytest ◆ GitHub Actions ◆ Tailwind ◆ Astro ◆ Linux ◆ Python ◆ FastAPI ◆ Next.js ◆ TypeScript ◆ PostgreSQL ◆ GCP ◆ AWS ◆ Docker ◆ Vue.js ◆ React ◆ Django ◆ Node.js ◆ Redis ◆ Playwright ◆ pytest ◆ GitHub Actions ◆ Tailwind ◆ Astro ◆ Linux ◆
04Index · Words

What others say.

01 / 04
“
A highly organized developer — brings predictability and clarity to what he takes on. Beyond technical mastery he adapts: when scope changes or incidents hit, he keeps focus on resolution. Ethical, reliable, collaborative.
Aloisio Souza Gonçalves
Scrum Master
05 Index · Contact

Let's build
something together.

01 · Anytime Email jeff.silva.caires@gmail.com → 02 · Professional LinkedIn /in/jefferson-caires → 03 · Code GitHub /JeffSSC →
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