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 →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.
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.
A Python serverless API that extracts and structures data from Brazilian electronic invoices (NF-e) using OCR.
PythonAWS LambdaTextractBedrockAPI GatewayS3Docker
Source →A legal chatbot using retrieval-augmented generation over a document corpus, deployed on AWS with a Telegram front door.
PythonRAGLangChainTelegram APIAWS EC2TranscribeBedrock
Source →A robotic hand that plays UNO — computer vision pipeline recognizes cards and drives motor control.
YOLOOpenCVPythonLeRobot
Source →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.
- 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.
- 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.
- 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