Julio Cesar Santos Andrade Thiscesarr

`julio=> SELECT * FROM engineer WHERE github = 'Thiscesarr';`

-[ RECORD 1 ]-+------------------------------------------------------------
name          | Julio Cesar Santos
role          | Data Engineering & Analytics intern @ Itaú Unibanco
day_to_day    | credit-recovery decision rules in high-volume systems,
              | Python + SQL batch simulations, AWS (Athena, S3, Lambda)
education     | Data Science
studying      | Spark · Airflow · dbt · Kafka  -> tracked in my own roadmap
goal          | become a data engineer one day
side_quest    | built an F1-style timer to speedrun League of Legends clears

(1 row)

🇧🇷 Em português

Sou estagiário de Data Engineering & Analytics no Itaú Unibanco, onde implemento e mantenho regras de decisão de crédito para recuperação de pessoas físicas, com Python, SQL e AWS. Estudo Ciência de Dados e meu objetivo é me tornar engenheiro de dados um dia. Gosto de construir ferramentas que as pessoas realmente usam: um roadmap de estudos com revisão espaçada, um cronômetro para treinar jungle no LoL e um app Android para não desperdiçar comida.

`$ git log --graph career`

%%{init: { 'gitGraph': { 'mainBranchName': 'career', 'showCommitLabel': true } } }%%
gitGraph
  commit id: "hello, world"
  commit id: "FIS · apprentice" tag: "2022"
  commit id: "Amazon · problem solver" tag: "2024"
  branch builds
  checkout builds
  commit id: "todo-api"
  commit id: "logica-cs"
  checkout career
  commit id: "Itaú · data eng intern" tag: "2025"
  checkout builds
  commit id: "mastermind-case"
  commit id: "android-app (private)"
  commit id: "de-roadmap"
  commit id: "jungle-splits"
  commit id: "controle-estoque"
  checkout career
  merge builds id: "data engineer" tag: "next" type: HIGHLIGHT

Admin apprentice at FIS → solving inbound problems with global teams at Amazon → turning credit-recovery policies into automated, auditable decisions at Itaú. Every step on the side branch shipped something.

`$ ls ./featured`

`$ ls ./lab` _{🔒 private, in progress}

Private Android pantry app, in development

ls -a · more builds and interview cases

repo	what it is	stack
controle-estoque	Interview case: inventory REST API with reservations and holds that stays consistent under concurrent requests	Python · FastAPI · pytest · Hypothesis · CI
mastermind-case	Interview case: web version of the Mastermind logic game with auth, saved matches and ranking	Java · Spring Boot · Angular
todo-api	RESTful task manager with validation, global error handling and Swagger docs	Java · Spring Boot · PostgreSQL · JUnit
logica-cs	Truth-table generator for my Mathematical Logic class, live on Vercel	Python · Flask · SymPy

`$ cat stack.yml`

Every tool here is tied to where I actually used it.

stage	tools	used in
query		credit-decision audits at Itaú · `todo-api` · `mastermind-case`
code		batch simulations and tests at Itaú · every repo above
cloud		Athena, S3, Lambda and Glue for ingestion and monitoring at Itaú
mobile		native Android app with Jetpack Compose, Room and WorkManager (private, in the lab)
serve		`controle-estoque` · `mastermind-case` · `todo-api` · `logica-cs`
ship		CI on `controle-estoque` · releases on `jungle-splits` · this README

`$ tail -n 3 pipeline.log`

This profile is a small data pipeline. Every day a GitHub Action extracts data from the GitHub API, transforms it in plain Python and loads every SVG on this page, in dark and light versions. No third-party stats service, no stale numbers. Source in pipeline/build.py.

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Julio Cesar Santos Andrade Thiscesarr

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`julio=> SELECT * FROM engineer WHERE github = 'Thiscesarr';`

`$ git log --graph career`

`$ ls ./featured`

`$ ls ./lab` _{🔒 private, in progress}

`$ cat stack.yml`

`$ tail -n 3 pipeline.log`

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Julio Cesar Santos Andrade Thiscesarr

julio=> SELECT * FROM engineer WHERE github = 'Thiscesarr';

$ git log --graph career

$ ls ./featured

$ ls ./lab 🔒 private, in progress

$ cat stack.yml

$ tail -n 3 pipeline.log

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`julio=> SELECT * FROM engineer WHERE github = 'Thiscesarr';`

`$ git log --graph career`

`$ ls ./featured`

`$ ls ./lab` _{🔒 private, in progress}

`$ cat stack.yml`

`$ tail -n 3 pipeline.log`