Web/App Projects
661 projects · Page 1 of 28
Thread-Safe Rate Limiter Library (Token Bucket + Sliding Window)
Already built and tested (13 passing tests incl. 200-thread concurrency). You will learn token-bucket and sliding-window algorithms, decorator APIs and thread-safety patterns.…
In-Process Event Bus with Retry, Backoff and Dead-Letter Queue
Already built and tested (11 passing tests). You will learn pub/sub design, exponential backoff, wildcard topics and dead-letter handling used in real microservices.…
Cron Expression Parser and Job Scheduler Engine
Already built and tested (18 passing tests incl. leap-year edge cases). You will learn 5-field cron parsing, next-run computation and scheduler engine design.…
Concurrent LRU/LFU Cache with Eviction Policies and Stats
Already built, mvn verify green (8 tests incl. multi-threaded). You will learn cache eviction policy design, thread safety and hit/miss instrumentation.…
Zero-Dependency JSON Parser and Serializer from Scratch
Already built, mvn verify green (9 tests). You will learn recursive-descent parsing, grammar design and robust error handling by writing a complete JSON engine.…
Priority Thread-Pool Executor with Real Futures
Already built, mvn verify green (6 tests). You will learn custom executor design, priority queues with FIFO fairness and Future-based result handling.…
Supabase Notes API: Auth, Row-Level Security and Realtime
Already built as a resume-grade project. You will learn Postgres row-level security, Supabase auth flows and realtime subscriptions.…
InvoicePilot: Invoicing SaaS with Payments and Webhooks
Already built and live-tested end to end (98 backend tests). You will learn SaaS architecture, payment order/capture flows, signed webhook handling and subscription billing.…
InvoicePilot Pro: Freelancer Invoicing Mobile App
Already built in the apps portfolio. You will learn phone-first invoicing UX, offline data handling and generating professional invoice PDFs on-device.…
BillGuard: Bills and Subscription Manager with Smart Reminders
Already built (core engine 70/70 tests). You will learn recurring-date mathematics - month-end clamping, leap years, reminder planning with quiet hours.…
ExcelPro: Excel Skills Trainer with Auto-Graded Exercises
Already built in the apps portfolio. You will learn formula parsing/evaluation and designing auto-graded practice systems for office skills.…
PDFPilot Pro: On-Device PDF Toolkit
Already built in the apps portfolio. You will learn on-device PDF merge/split/compress pipelines and golden-file correctness testing.…
PermitPilot: Permit and Licence Renewal Vault
Already built in the apps portfolio on a tested due-date engine. You will learn document-vault design, renewal escalation flows and trade-specific starter packs.…
InspectPilot: Offline Inspection Report Writer
Already built in the apps portfolio. You will learn checklist-driven report design, photo annotation, completeness gates and branded PDF delivery with an offline outbox.…
ChillCheck: Food-Safety (HACCP) Digital Logbook
Already built in the apps portfolio. You will learn compliance logbook design - temperature checks, corrective-action flows and append-only audit records for inspectors.…
InkNote Pro: Handwriting Notes App with Ink Engine
Already built as the portfolio flagship. You will learn low-latency ink rendering, stroke modelling and notebook organisation UX.…
WorksheetKids: Kids Worksheet Generator with Parent Dashboard
Already built in the apps portfolio. You will learn procedural worksheet generation, difficulty progression and parent-facing progress dashboards.…
CoderPrep: Coding Interview Preparation Platform
Already built in the apps portfolio. You will learn question-bank design, spaced practice flows and progress analytics for Java/Python interview prep.…
MathsMaster: Step-by-Step Animated Maths Learning App
Already built in the apps portfolio. You will learn step-animation design for maths concepts and curriculum mapping for Indian school boards.…
Open-Source Contribution Project: Beckn-ONIX Protocol (Registry Fix)
Based on a real merged-track contribution (registry Lookup cache fix, PR open on the public repo). You will learn how open-protocol networks work and how to land a reviewed PR in a large open-source codebase.…
Online Examination Portal with Auto Evaluation and Proctor Logs
Build a full exam portal with question banks, timers and auto-grading. You will learn session security, concurrent submission handling and result analytics.…
Hospital Management System with Appointment and Billing Modules
Build OPD, pharmacy and billing workflows for a clinic. You will learn role-based access, transactional billing and report generation.…
E-Commerce Platform with Cart, Payments and Order Tracking
Build a store with catalogue, cart, checkout and seller dashboard. You will learn payment integration, order state machines and inventory control.…
Smart Hostel Management System with Complaint and Mess Modules
Build room allocation, mess billing and complaint tracking for hostels. You will learn multi-role workflow design and audit trails.…