          classified · bingo book entry · do not engage without coffee
        

Ninja report

The official record the village keeps on me: missions completed, jutsu mastered, and the academy I barely survived. The paper version exists too.

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            ninja registration card
            A-RANK
          

name: Simão Júnior · reg. 012-607
village: São Paulo, BR · UTC-3
rank: Jōnin · senior backend engineer
contact: [email protected] · github · linkedin · bluesky
status: active duty · open to interesting missions

Intel summary

Backend engineer with 5+ years developing critical, scalable systems in high-availability environments (~15 TPS, 40,000+ monthly transactions). End-to-end involvement, from planning to production, with a culture of ownership, technical leadership, and documentation (RFCs, ADRs). Solid experience designing distributed systems and microservices architectures.

S Cut operational costs by 40% through automation and process optimization with N8N.
A Saved 80 hours/month by automating commercial reports integrated with internal systems.
A Accelerated deployments by 80% (5 min → 1 min) with CI/CD via GitHub Actions, Docker, and Azure Container Registry.

Mission history

4 missions · 0 failed

2026

Senior Backend Engineer · Caveo · hybrid

Technically led the refactoring of a legacy system into a microservices architecture, optimizing the onboarding flow on the road to 20,000 users.
Designed and implemented an event-driven architecture (fan-out) with AWS SNS/SQS between a Next.js BFF and the backend.

            2025–26
          

Backend Engineer (Mid III) · Caveo · hybrid

Built backend services with Node.js, TypeScript, Koa.js, and PostgreSQL (TypeORM) on AWS (SNS, SQS, Cognito, S3).
Led integrations with business-critical providers: KYC via QItech, and operational/sales automation via Pipefy and Pipedrive with N8N.

            2023–25
          

Backend Engineer · Nextcode · remote

Architected an onboarding system with facial biometrics, OCR, taxpayer ID validation, and proof of life, processing 40,000+ monthly transactions (~15 TPS).
Integrated Serpro and Receita Federal APIs, raising approval rates and cutting fraud; built a biometric risk-scoring system that reduced chargebacks.
Automated commercial reports and alerts with N8N, saving 80 hours/month with 100% SLA compliance.
Built a WhatsApp notification service on NATS.io; shipped a Flutter app for private events with KYC.
Mentored interns, introduced an RFC process, and created CI/CD pipelines that cut deploys from 5 minutes to 1.

            2021–23
          

Backend Engineer (Junior) · Nextcode · remote

Documented company APIs and evolved legacy solutions with clean code practices and automated tests.
Built RESTful APIs with Node.js/Fastify, TypeScript, and MongoDB.

Jutsu registry

backend: TypeScriptJavaScriptNode.jsElixirSQLRESTGit
databases: PostgreSQLMongoDBRedisMySQL
messaging: AWS SNSAWS SQSNATS.iowebhooks
devops: AWSDockerGitHub ActionsCI/CDN8N
training: system designGoleadershipmicroservices

Academy record

2018–21: B.Sc. Information Systems · Universidade Anhembi Morumbi, São Paulo

Languages

portuguese: native
english: advanced

              handler's note
            

Self-taught, startup-hardened, and still training. Approach with interesting problems; he will not go rogue, but he will ask for an RFC.