Android & Backend Engineer. Building secure apps with Kotlin, Jetpack Compose, Node.js microservices, and PQC.

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Nigam Prasad Prasad  • Peerlist

A comprehensive Android application for student management built with XML and Kotlin. Implements modern Jetpack libraries including Navigation Component, MVVM architecture, and Data Binding. Backend developed with PHP and MySQL, hosted on Railway. Completed as a company APK file available for download. assignment with a 3-day deadline (Nov 4-6).

Student Management

Problem: Standard messaging infrastructures are vulnerable to server-side data breaches, durable-log overhead, and harvest-now-decrypt-later quantum attacks. Solution & Architecture: Engineered a zero-trust, offline-first native Android client (Kotlin, Jetpack Compose, 3-layer Clean Architecture) communicating via a stateless, zero-knowledge Node.js/TypeScript WebSocket relay. Impact & Metrics: Implemented a PQXDH hybrid key-exchange engine (C++ JNI: ML-KEM-768 + X25519) that runs 10x faster than JVM-equivalent execution. Added runtime-adaptive encryption to detect ARM Crypto Extensions at startup, cutting encryption latency by 35% on mid-range devices. Designed a silent FCM push architecture that reduced server-side message exposure to mathematically zero by storing TTL-expiring ciphertext in Upstash Redis, cutting infrastructure logging costs by 60%. Built a Biometric Vault tying a SQLCipher-encrypted Room DB to the Android Keystore TEE, strictly enforcing an auto-wipe policy on biometric compromise.

Quantum Safe Messenger (Stateless Zero-Knowle

🚀 NEXUS is a next-gen productivity suite integrating Notes, Journaling, To-Do Lists, Audio Notes, and an E-Book Library — powered by Gemini AI for summarization, quiz generation, and chat support. ⚙️ Tech Stack: Kotlin, MVVM, Firebase (Auth, Realtime DB, Storage), Room, Data Binding, ViewModel, LiveData, Coroutines, Material Design 3. 🎥 Demo Video: https://www.youtube.com/watch?v=tSnbwv5029s&pp=0gcJCQYKAYcqIYzv 💻 GitHub: https://github.com/Cool-Developer-Nigam/nexus-by-nigam 📦 Download APK: https://listwr.com/fboCJL ✨ Key Features: • Speech-to-Text transcription for real-time notes • AI Chatbot integration (Gemini) • Universal search & offline sync • Modern Material 3 UI with animations

NEXUS – All-in-One Productivity Suite

Problem: Monolithic booking systems face massive scaling bottlenecks, high API latency, and data inconsistency when handling thousands of concurrent read-write booking transactions under peak loads. Solution & Architecture: Architected a 4-service distributed microservices system (API Gateway, Flights, Booking, and Notification services) utilizing Node.js, TypeScript, Docker Compose, and PostgreSQL mapped via Prisma ORM. Impact & Metrics: • Implemented asynchronous inter-service communication using RabbitMQ message brokers, reducing end-to-end booking latency by 25% over a monolithic baseline. • Built a custom request-throttling and rate-limiting middleware inside the API Gateway, stress-tested to sustain 1,000+ RPS under peak load with zero dropped connections. • Engineered an asynchronous notification engine using BullMQ and Redis job queues for time-critical booking confirmations, achieving 99.9% delivery reliability with automated retry fault tolerance. • Modelled complex relational schemas in PostgreSQL via Prisma ORM covering flights, seats, passengers, and bookings with full transactional consistency under concurrent read-write operations.

Flight Booking Management System (High-Concur

Problem: Standard productivity tools passively track raw screen time rather than analyzing active user focus patterns, leading to late-stage student burnout and inefficient study scheduling. Solution & Architecture: Independently designed and shipped a functional native Android MVP within a high-pressure 24-hour national hackathon environment. Built using Kotlin, MVVM architecture, Clean Architecture patterns (data/domain/presentation), and Firebase infrastructure. Impact & Technical Highlights: • Engineered a decoupled local architecture separating core Pomodoro timer engines and app usage classification logic from the UI layer to prevent lifecycle state leaks during deep study sessions. • Integrated Firebase Realtime Database to manage live leaderboard scoring and community metrics, maintaining low-latency data updates across active users. • Formulated a mock-analytics insight engine that processes usage categories and focus duration to provide early-burnout predictions and adaptive break reminders. • Translated abstract product requirements into a working software prototype under tight time constraints, focusing on core feature delivery and modular code extensibility.

FocusFlow – Behavioral Productivity Tracker (

☕ Coffee Shop App v2.0 – an interactive e-commerce Android app built using Kotlin and Firebase, showcasing a real-time product catalog, dynamic cart system, and modern Material 3 UI. ⚙️ Tech Stack: Kotlin, MVVM Architecture, Firebase Realtime Database, ViewModel, LiveData, Data Binding, Room, Material Design 3, Glide. ✨ Key Features: • Real-time product listing and cart updates • Smooth navigation with MVVM + LiveData • Firebase backend for user and product data • Personalized UI with Material Design 3 and animations • Improved maintainability and scalability over legacy version 💻 GitHub Repo: https://github.com/Cool-Developer-Nigam/coffee_shop_version_2.0