Brave Leuterio
Hello, my name is

Brave Leuterio.

Fullstack AI Engineer.

Fullstack engineer specializing in fintech infrastructure and AI automation. 4+ years shipping payment systems, microservices, and cloud infrastructure — now making them smarter with LLMs and agentic workflows.

Say Hi →GitHub
40%+Faster Delivery
85%Fraud Reduction
50K+Daily Txns
4 yrsExperience
01.

About Me

Fullstack engineer specializing in fintech infrastructure and AI automation. I build payment systems, fraud prevention tools, and microservices that handle real production load — then make them smarter with LLMs and agentic workflows.

My stack spans Next.js, Node.js, TypeScript, Go, Python, PostgreSQL, Redis, GCP, and AWS. I've shipped payment gateway infrastructure handling 50K+ daily transactions, cut fraud incidents by 85%, and built AI automation pipelines for a European tech company processing millions.

  • Payment systems & fraud prevention
  • Go microservices & gRPC at scale
  • AI automation & agentic workflows
  • Next.js & React frontends
ai-dev-workflow.log
AI Automation FlowDiagram showing a webhook trigger feeding into an LLM process via Claude API, which outputs to an action (notify or store).TRIGGERWebhookLLM PROCESSClaude APIACTIONNotify / Store
02.

Experience

08/2025 — Present

Full Stack Developer

·PISOMIND Inc. (formerly Creatizens Corp.)

Built payment gateway infrastructure for high-volume merchant transactions. Developed internal activity monitoring tools for operational tracking and reporting. Accelerated feature delivery through modern AI-augmented development workflows.

Next.jsTypeScriptGoCI/CDClaude Code
04/2023 — 08/2025

Full Stack Developer

·Creatizens Corp.

Migrated legacy architecture to modern microservices powering the company's core product suite. Engineered fraud prevention system significantly reducing incidents. Built merchant-facing and internal interfaces with real-time state management. Optimized database performance through query tuning and caching strategies. Mentored junior developers, improving team velocity.

GogRPCNext.jsReactAngularPostgreSQLRedisGCPDocker
05/2022 — 04/2023

Full Stack Developer

·Far Eastern University

Built a gamified student platform serving 10K+ students with learning portals and engagement mechanics. Designed an achievement engine processing 20K+ records. Engineered a real-time leaderboard capable of handling high concurrency without degrading the user experience.

ReactNode.jsMongoDBExpressReduxFirebase
03.

Skills & Technologies

Frontend

  • ▹Next.js
  • ▹React
  • ▹TypeScript
  • ▹Tailwind CSS
  • ▹SCSS/BEM
  • ▹Angular

Backend

  • ▹Go
  • ▹Node.js/Express
  • ▹Python
  • ▹gRPC
  • ▹RESTful APIs
  • ▹Microservices
  • ▹Event-Driven Architecture

Databases

  • ▹PostgreSQL
  • ▹MySQL
  • ▹MongoDB
  • ▹Redis
  • ▹Firestore

Cloud & DevOps

  • ▹GCP (Cloud Run, Pub/Sub, Firebase)
  • ▹AWS
  • ▹Docker
  • ▹Terraform
  • ▹CI/CD

AI & Tooling

  • ▹Agentic Workflows
  • ▹RAG
  • ▹LLM Integrations
  • ▹n8n
  • ▹Claude Code
  • ▹Cursor
  • ▹AI-Augmented Development

Security

  • ▹JWT
  • ▹OAuth2
  • ▹MFA
  • ▹Hashing
  • ▹Encryption
04.

Projects I've Built

CS EXPO screenshot

CS EXPO

Event platform for FEU Tech graduating CS students to showcase their theses aimed at improving the community.

  • AstroJS
  • React
  • JavaScript
  • HTML/CSS
Flickify screenshot

Flickify

Music information platform inspired by Netflix. Uses Spotify API for authenticated access to personal music libraries and album search.

  • React
  • Redux
  • Spotify API
  • SCSS
Rioflix screenshot

Rioflix

Movie information platform with Netflix aesthetics. Includes lists of movies, documentaries, and series with Firebase auth and Jest testing.

  • React
  • Firebase
  • MUI
  • SCSS
  • Jest
Trade-Off screenshot

Trade-Off

Barter system where users exchange goods without money. Built with CodeIgniter4 MVC pattern, developed collaboratively.

  • PHP
  • CodeIgniter
  • MySQL
  • VanillaJS
05.

Other Notable Projects

KnowYourPlate demo

KnowYourPlate

Thesis that represented FEU Tech at an international CS conference. Mobile app using ML to predict health diseases from diet records.

  • Flutter
  • Firebase
  • Bloc
Tinkler demo

Tinkler

Social media app with light/dark mode built in Flutter. Users can post updates and follow others.

  • Flutter
  • Firebase
  • Cache
Bizz demo

Bizz

E-commerce app in Flutter/Dart for buying and selling clothes. Users can become seller members.

  • Flutter
  • Firebase
  • Stacked
View more on GitHub →
06.

Get In Touch

Drop a Line

I'm always interested in hearing about new projects and opportunities. Feel free to reach out if you have any questions or want to collaborate.

Say Hi →