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Alvo

Summary

Key Achievements

Bullets de Experiencia

Todos os bullets ficam visiveis ate voce desmarcar algum.
NewCode - FullStack Engineer
Atomic Fund - Backend Engineer
Klever - Backend Engineer

Projetos

Ordem de Skills

Languages & Frameworks
TypeScript
JavaScript
Node.js
Golang
Python
SQL
Backend & APIs
NestJS
Express
Fastify
REST APIs
WebSockets
gRPC
GraphQL
Microservices
DevOps & Cloud
Docker
Kubernetes
GitHub Actions
CI/CD
AWS
Hetzner
DigitalOcean
Coolify
Cloudflare
Linux
Data & Storage
PostgreSQL
PostGIS
ClickHouse
Redis
MongoDB
DynamoDB
BullMQ
RabbitMQ
TypeORM
Prisma
Specialized Tooling
Mapbox
Martin
PMTiles
Tippecanoe
GeoJSON
Better Auth
Scalar
MinIO
Tesseract
ClamAV

Checagens manuais

Volte aos fundamentos. Nao envie.6/10
✗Headline com cargo + 3 especialidades
✓Summary com >= 2 metricas
✓Exatamente 3 Key Achievements
○Cada bullet segue STAR-Mmanual
✓Skills em 5 blocos tematicos
○Links clicaveis e funcionandomanual
✓Single-column ATS-friendly
✓Keywords da vaga presentes no texto
○Revisao de ingles impecavelmanual
✓Maximo 2 paginas

Márcio Júnior

Backend Software Engineer | TypeScript · Node.js · Golang · Data-Intensive Systems

+55 63 992386944•marcio.mj70@gmail.com•LinkedIn•GitHub•São Paulo, Brazil (GMT-3)

Summary

Backend Software Engineer with 4+ years building data-intensive systems and shipping production software across fintech, crypto, and gov-tech. Proven track record shipping high-throughput pipelines, refactoring legacy platforms, and building developer tooling for teams and end users. I have improved systems serving 70k+ registered users and processing millions of records, and I am looking to join a team solving hard backend and infrastructure problems at scale.

Key Achievements

12M+ Record Geospatial ETL

Architected and shipped "Sequoia", a streaming pipeline ingesting 12M+ records via Node.js Streams and Postgres COPY with minimal memory footprint.

10x Legacy Service Optimization

Re-engineered crypto services into non-blocking concurrent architecture, cutting startup time by 10x.

End-to-End Geospatial SaaS

Solely developed a geospatial intelligence platform from NestJS microservices and PostGIS to PMTiles vector tiles and Mapbox rendering.

Experience

NewCodeRemote, Brazil
FullStack EngineerApr 2026 - Present
  • Implemented a backend-mediated upload pipeline that scans every document via ClamAV, verifies SHA-256 hashes, versions metadata, and persists files to MinIO.
  • Modeled a process state machine with append-only audit history, authorization-aware transitions, and optimistic locking, eliminating race conditions in municipal workflow state changes.
  • Established an on-premise OCR pipeline using Tesseract.js for Portuguese-language documents, removing cloud OCR dependencies and keeping LGPD-sensitive data in-house.
Atomic FundRemote, Brazil
Backend EngineerJan 2025 - Fab 2026

A crypto market maker providing liquidity services across major centralized and decentralized exchanges.

  • Developed a geospatial intelligence platform from the ground up using NestJS microservices and PostGIS, modeling and querying 12M+ records for real-time spatial analysis.
  • Shipped “Sequoia”, a streaming ETL pipeline that ingested 12M+ records from CSV and Shapefile sources via Node.js Streams and Postgres COPY with minimal memory footprint.
  • Orchestrated 5,000-record batches through BullMQ and Redis workers, sustaining high-throughput ingestion without blocking the event loop.
  • Lowered vector tile payload size and improved Mapbox rendering performance by automating GeoJSON-to-PMTiles conversion via Tippecanoe and serving tiles through Martin.
  • Hardened the crypto Data Collector across major centralized exchanges, ensuring consistent storage of market snapshots and trades into ClickHouse for markets including USDT/BRL backed by 500k BRL in fund liquidity.
KleverRemote, Brazil
Backend EngineerAug 2022 - Feb 2025

Klever is a financial services company within the crypto ecosystem.

  • Saved ~70k registered users 100% of TRX withdrawal fees by implementing energy and bandwidth delegation on TRON, enabling gasless transactions without manual TRX funding per withdrawal.
  • Led the refactoring of a critical custody service managing $1M+ in aggregate assets across ~70k registered user wallets, improving secure liquidity provision and high availability for core financial operations.
  • Refactored legacy services to support concurrent processing, cutting application startup time by 10x and increasing overall throughput.
  • Authored reusable SDKs and CLIs that standardized integrations across internal teams and accelerated service delivery.
  • Developed automated trading bots and execution strategies, ensuring reliable trade execution across crypto markets.

Skills

Languages & Frameworks: TypeScript · JavaScript · Node.js · Golang · Python · SQL

Backend & APIs: NestJS · Express · Fastify · REST APIs · WebSockets · gRPC · GraphQL · Microservices

DevOps & Cloud: Docker · Kubernetes · GitHub Actions · CI/CD · AWS · Hetzner · DigitalOcean · Coolify · Cloudflare · Linux

Data & Storage: PostgreSQL · PostGIS · ClickHouse · Redis · MongoDB · DynamoDB · BullMQ · RabbitMQ · TypeORM · Prisma

Specialized Tooling: Mapbox · Martin · PMTiles · Tippecanoe · GeoJSON · Better Auth · Scalar · MinIO · Tesseract · ClamAV

Education

Ulbra
Bachelor's degree, Computer Software EngineeringJan 2024 - Dec 2028

Languages

EnglishProficient
PortugueseNative
SpanishRead/Comprehend