● Case study
Aligatoras
Crypto-Powered Task & Earnings Platform
Node.js • MySQL • Telegram Bot API • Crypto Payments • Wallet Integrations • Webhooks • JWT Authentication • Telegram Mini App
MY ROLE
Full-Stack Product Developer
PROJECT TYPE
Crypto / Transactional Platform
STATUS
Live
Overview
Aligatoras is a task-based earning platform where users complete approved activities, earn rewards, maintain account balances, and withdraw funds through crypto-based payment flows.
The product evolved from an earlier version of the platform that used traditional payment rails. Aligatoras replaced that model with crypto-based settlement while retaining the core task, balance, withdrawal, and administrative systems.
My work focused on the backend architecture, database logic, reward and balance management, crypto withdrawal workflows, wallet handling, transaction validation, authentication, administrative controls, and the safeguards required to keep account state consistent.
The challenge
The biggest challenge was maintaining financial accuracy while introducing crypto-based withdrawals and settlement flows.
Once users can earn funds and withdraw them to external wallets, the platform must correctly handle balances, transaction states, wallet information, external payment responses, failed operations, and repeated requests.
Aligatoras therefore needed to:
- prevent the same task or transaction from being credited twice;
- validate withdrawal requests before balances were changed;
- handle wallet addresses and crypto payment destinations correctly;
- track transaction states from request through settlement;
- protect balances from simultaneous or repeated actions;
- authenticate sensitive account operations;
- maintain clear administrative visibility into rewards and withdrawals;
- synchronize internal account records with external crypto-payment activity.
The challenge was creating a transactional system where user actions and external payment events could not leave balances in an inconsistent state.
The solution
I designed the platform around controlled transaction states rather than simple balance deductions and credits.
Reward events are validated before funds are added to a user’s account, while withdrawal requests pass through eligibility, balance, destination, and transaction checks before processing.
The backend maintains transaction records throughout the withdrawal lifecycle so account activity can be tracked independently of the external crypto payment itself.
Database-level protections and per-user action controls help prevent simultaneous requests from creating duplicate or conflicting balance changes. Authentication, validation, rate controls, and administrative tools add additional protection around sensitive operations.
This architecture allows Aligatoras to combine a task-based earning model with crypto settlement while keeping the internal ledger and external transaction activity aligned.
● Key features
Task-Based Earnings System
Users complete approved tasks and receive rewards through controlled backend workflows that update their account balance.
Crypto Withdrawal Workflows
Users can request withdrawals to supported crypto destinations, with eligibility and balance checks applied before processing.
Wallet & Destination Validation
Withdrawal information is validated before funds move through the settlement workflow.
Duplicate Transaction Protection
Reward and payment events are checked before processing to reduce the risk of repeated credits or withdrawals.
Transactional Balance Controls
Database locking and application-level safeguards help keep balances consistent when multiple actions occur close together.
Transaction Lifecycle Tracking
Withdrawals and other financial activity retain clear states so requests, processing, completion, and failures can be tracked.
Secure Account Access
Authentication and authorization controls protect sensitive user and financial actions.
Administrative Operations
Admins can review users, tasks, rewards, balances, withdrawals, and other transactional activity from a central system.
My contribution: backend architecture, database design, task rewards, balance management, crypto withdrawal workflows, wallet handling, transaction validation, authentication, concurrency protection, and administrative systems.
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