Open for backend consulting

Rival Arya Pirmansah

Your backend is the bottleneck. I fix that.

40min → 1min import · 108× faster response times · APIs that scale

Discuss your backend problem

Node.jsGoPythonPostgreSQLMongoDBRedisDockerGCP

rifall.aryap@gmail.com+62 838-2746-8104Garut, Indonesia

Case Studies

Deep dives into specific technical problems — what broke, how I diagnosed it, and what changed.

Case Study· Berijalan (seva.id)

Reducing Excel Import from 40 Minutes to 1 Minute

A ~100MB automotive inventory import was silently hanging for 40 minutes. I diagnosed four root causes and restructured the pipeline — cutting it to under 1 minute.

40 min

Before

~1 min

After

97% faster

Improvement

PerformanceBackendNode.jsPostgreSQL

Read

Core Projects

Production systems demonstrating performance optimization and scalability.

Live

Rivalistic - Face Recognition API

Production-ready face recognition API processing 20,000+ facial records with sub-2-second inference latency. Built to simplify facial verification int...

Next.jsPythonFastAPI+2

Completed

Handling 1 Million Records

Implemented optimized bulk insert strategies reducing insert time from ~3 minutes to ~20 seconds. Performance tuning achieved through efficient data h...

Node.jsMongoDBPerformance Optimization

Live

IMDB Performance Optimization

Optimized backend application achieving 108.22× faster response times (2876.061ms -> 26.576ms) with ~99% latency reduction. Focused on code and databa...

GoPostgreSQLPerformance Tuning

Hobby Projects

A collection of personal experiments where I explore ideas, prototype concepts, and test new technologies, including AI, computer vision, and real-time systems.

Completed

YT Music Downloader

Download songs from YouTube Music using yt-dlp and the Deezer API for metadata retrieval.

GoNext.jsWails

Completed

Contribute to CodeIgniter 4

Contributed to the CodeIgniter 4 open-source framework by enhancing developer experience through a new CLI capability.

PHPCodeIgniter4

Completed

AI Face Recognition Attendance System

Intelligent attendance system using computer vision and machine learning for real-time face detection and recognition in secure environments.

PythonOpenCVDeepFace+1

Completed

Too Lazy To Type

Desktop Speech-to-Text application converting spoken words into text in real-time, demonstrating AI implementation in everyday productivity.

PythonCustom TkinterOpenAI+1

Completed

Git Blame Inline

A lightweight VS Code extension that shows git blame information inline in your code editor without cluttering your interface.

VS Code ExtensionTypescript

Completed

Semeru Automation

Electron-based automation tool for semeru.id that generates JavaScript code for manipulating the form on https://bromotenggersemeru.id/ via the browse...

ElectronTypescript

Completed

Realtime Chat Application

Scalable real-time chat system using event-driven architecture, focusing on data streaming efficiency with Firestore.

Vue.jsTailwind CSSFirebase Firestore+1

Completed

Paragraphs Detector

Image processing tool detecting and highlighting paragraph blocks in document images for contextual PDF layout understanding.

PythonOpenCV

Completed

Word Puzzle Solver

Logic-based puzzle solver generating valid words from given letters without AI, sharpening algorithmic thinking skills.

Node.jsAlgorithms