Cat
Pereira

Worked on platform micro services, fully designing and implementing features across our stack from the database structure (Postgres, Prisma), to API design (NestJS, REST), and our user interfaces (TypeScript, React, Svelte).

✦ Designed and built the Airship Developer Fund with fund distribution auditing, earnings breakdown, and payout tooling

✦ Built a playtime tracking data pipeline using PubSub and BigQuery with Terraform-provisioned infrastructure

✦ Built admin tooling for payouts and added user payout information forms and validation with Tipalti

✦ Added multi-provider account linking with Firebase (Google, Apple, Steam) and automatic Steam friends detection and cross-platform friend request functionality using Steamworks API

✦ Designed and built platform moderation tools and dashboards for internal moderation with auditing, along with game-scoped moderation tools for developers with a full permission system

✦ Built a content moderation pipeline using GCP's moderation API, including confidence level and threshold tuning implemented across all visible text inputs

✦ Added player count metrics using Prometheus with live display in Grafana

✦ Added user-facing dashboards and webpages for features such as live queue times, organization member and data management, and account management

A website I hosted to track live player count statistics for the multiplayer game platform Airship using GCP Cloud Run, Cloud Scheduler, Firebase Hosting, and Neon.

Web app that converts American Sign Language fingerspelling to text in real-time using a webcam.

✦ Per-frame letter detection (A-Z) and streaming phrase transcription using a CTC transformer

✦ Isolated word recognition against 250 common ASL signs with hand skeleton overlay visualization

✦ Learn screens with animated reference clips and optional text-to-speech output

Video captioning app with automated transcription, speaker diarization, and inline caption editing.

✦ Drag-and-drop upload with live transcription progress via Whisper and optional speaker diarization

✦ Inline editor with seek-to-click, keyboard shortcuts, undo/redo, and vocal isolation via Demucs

✦ Export to .srt/.vtt or render captions directly into video files; auto-save with project thumbnails

CLI tool that generates labeled image datasets from plain-English descriptions using Claude AI.

✦ Fetches and deduplicates images from multiple sources (DuckDuckGo, Wikimedia, iNaturalist, Openverse)

✦ Interactive image review and validation, then fine-tune image classifiers with automatic learning rate detection

✦ Led technical and creative development of over 10 purchasable and playable in-game characters

✦ Contributed to a weekly content update schedule for over 3 years

✦ Designed and implemented match reconnect support with asynchronous match performance finalization

✦ Worked on the “BedWars Creative” in-game UGC system featuring custom Lua scripting API and tooling

✦ Designed and built the in-game tournament team creation, assignment, and event scheduling system

✦ Contributed to a weekly content update schedule

✦ Led technical development of boss fights and interactable characters

✦ Added various mini-games, events, and quests

Package building off my existing work with the dinscribe package to add speech diarization into my audio pre-preprocessing pipeline.

Package streamlining multiple steps of applying audio pre-processing libraries to clean noisy audio and detect speech.

Designed to optimize speed and accuracy of OpenAI's Whisper transcription model.

Website hosting transcriptions of all driver radio communications from the 2025 F1 season.

Transcriptions were processed from raw driver radio audio using a custom audio processing pipeline, Whisper model prompting, and post-transcription refinement using LLMs.

Web game inspired by GeoGuessr for F1 fans to guess the year and grand prix from a photo of the race.

Screencaps were automatically collected from F1 highlight videos available on YouTube and filtered using a custom fine-tuned vision model for quality.

Audio embedding and dimensionality reduction visualizer using audio data sourced from the FreeMusicArchive music library.

Interactive step-through visualization of the Byte Pair Encoding algorithm as implemented in GPT-2's tokenizer.

Browser-based interactive tool for visualizing how convolutional operations transform images in real-time.

✦ Animated kernel sliding with per-position multiply-add breakdowns in single conv mode

✦ Playground mode for adjusting kernel values, stride, and padding with live output updates

✦ Multi-layer mode stacking up to 3 conv layers with ReLU and max pooling to observe feature map evolution

Web app that visualizes what a trained CNN model perceives at each layer when processing CIFAR-10 images.

✦ Layer-by-layer feature map visualization as grayscale grids with per-class prediction probabilities

Interactive web app that compares six major CNN architectures (LeNet-5, AlexNet, VGG-11, Inception-mini, ResNet-20, DenseNet-BC) side-by-side on the same image.

✦ Parallel client-side model inference using ONNX Runtime Web

✦ Real-time feature map visualization and per-architecture diagrams

My personal website for sharing my personal and work projects. You're here!