Portfolio

Maharani Dewi (Rani)

Mathematics Student @ ITS • Backend Engineer & Tech Lead

I blend mathematical logic with production software engineering, high-concurrency Go backend architectures, and technical product leadership.

I architect reliable, fault-tolerant systems—from national competition platforms serving 5,400+ user accounts with automated payment lifecycles, to distributed Go worker pools with chunk-level checkpointing.

Experienced as Project Manager & Tech Lead converting business workflows into clean API contracts, automated CI/CD pipelines, and zero-incident releases.

Open Resume

Technical Capabilities

Backend & Concurrency

Go (Golang)GinGORMPostgreSQL 16Redis / ValkeyRESTful APIsWebhook Idempotency

Frontend & Mobile

Next.jsTypeScriptReactTailwind CSSKotlin (Compose)PWA

AI, Cloud & DevOps

Docker ComposeGitHub Actions (CI/CD)Linux VPSGemini SDKGroq APIMidtransBrevo

Leadership, SDLC & Core

Product Lifecycle (SDLC)API Contract DesignSprint PlanningPythonJavaSQLMATLAB

Selected Work

A compact archive of projects, roles, impact, and what each build taught me.

Production ReadyOrganization Platform2026

OMITS 19th Platform

OMITS 19 is the official full-stack competition and operations platform for the 19th ITS Mathematics Olympiad. It automated participant registration, regional sorting, tiered voucher pricing, Midtrans payment processing, credential generation, and real-time administrative workflows for over 5,400 accounts.

Role

Project Manager, Tech Lead & Core Full-Stack Engineer

Collaboration

Team Project

Impact

Successfully served 5,400+ user accounts and processed 2,200+ national competition registrations with 99%+ uptime. Reduced operational and financial verification workload by ~90% through automated webhook reconciliation and instant credential dispatch. Delivered the platform on schedule weeks before national registration waves.

Learning

Mastered production transaction consistency (atomic database transactions and idempotency), webhook reconciliation architectures, decoupled batch processing with rate-limited email dispatchers, and strategic leadership in translating cross-functional organizational rules (finance, secretariat, academic) into technical specs.

Key Features

5,400+ User Accounts & 2,200+ Registrations Managed99%+ System Uptime with Zero Critical DowntimeIdempotent Midtrans Webhook & Payment LifecycleAutomated Payment Discrepancy & Reconciliation ResolverDecoupled Bulk Account & Rate-Limited Credential MailerReal-Time Brevo Webhook Delivery Status TrackingDynamic Wave Pricing, Voucher Engine & Bundle Discounts4-Tier Role-Based Access Control (RBAC) & Audit LoggingSecure S3 Identity Verification & Dynamic PDF InvoicesAdmin Real-Time Analytics & One-Click CSV Data Exports

Tech Stack

GoGinPostgreSQL 16GORMNext.jsTypeScriptTailwind CSSMidtrans Payment GatewayBrevo Email APIBiznet NEO S3Docker ComposeGitHub Actions (CI/CD)Linux VPSUptime Kuma

Live Demo

Rani Wu

Let's collaborate, talk system architectures, or solve mathematical problems. Feel free to drop a message.

Open Resume

Send a Message

Maharani Dewi (Rani)

Mathematics student at Institut Teknologi Sepuluh Nopember (ITS) combining mathematical logic with production software engineering, high-concurrency Go backend architectures, and technical product leadership.

Experienced in building production systems handling 5,400+ users, distributed Go worker pools, and AI pipeline orchestration.

Open Resume

Backend & Architecture

Go (Golang)GinGORMChiPostgreSQL 16Redis / ValkeyRESTful APIsWebhook ArchitectureDatabase Transactions & Indexing

Frontend & Mobile

Next.jsTypeScriptReactTailwind CSSKotlin (Jetpack Compose)Vanilla JavaScriptPWA & Web Extensions

AI & Integrations

Google GenAI SDK (Gemini)Groq APIOpenRouterMidtrans Payment GatewayBrevo Email API & Webhooks