Adulis
Financial platform with deal management, competitive bidding, escrow services, and integrated wallet system.
01 Project Overview
Adulis is a financial backend platform that facilitates deal management between parties with built-in escrow protection. It provides a complete ecosystem for posting deals, managing competitive bids, processing payments through an escrow system, and maintaining digital wallets, all backed by a comprehensive admin dashboard for oversight and management.
02 Problem Statement
Financial transactions between parties often lack trust and transparency. Without a neutral intermediary, deals can fall apart, payments can be disputed, and both parties face risk. There was a need for a platform that could act as a trusted escrow service while also providing a marketplace for deals and competitive bidding.
03 Solution Overview
The backend provides a complete financial services API with deal lifecycle management, a bidding engine for competitive deal pricing, an escrow service that holds funds until deal conditions are met, an integrated wallet system for fast transactions, and a notification system to keep parties informed at every step.
04 Key Features
Deal Management
Complete deal lifecycle: creation, negotiation, approval, completion, and dispute resolution.
Competitive Bidding
Real-time bidding system allowing vendors to compete on deals with automated bid management.
Escrow System
Secure fund holding with conditional release based on deal milestones and mutual agreement.
Wallet System
Integrated digital wallet for deposits, withdrawals, and internal fund transfers between users.
Admin Dashboard
Comprehensive admin panel with deal oversight, user management, financial reporting, and dispute resolution tools.
Notifications
Real-time notifications for deal updates, bid activity, payment confirmations, and system alerts.
05 System Architecture
06 Technology Stack
07 DevOps & Deployment
I personally deploy and maintain this system in production. The infrastructure runs on AWS with containerized services managed through Docker Compose. Nginx handles reverse proxying and SSL termination. Database backups are automated, and I actively monitor service health and performance.
AWS Cloud
Production Hosting
Docker
Containerized Deploy
Nginx
Reverse Proxy + SSL
08 Challenges & Solutions
Financial Data Integrity
Challenge: Ensuring transactional consistency across wallet operations, escrow holds, and deal settlements. Solution: Implemented database transactions with proper isolation levels, atomic operations for financial mutations, and comprehensive audit logging.
Concurrent Bidding
Challenge: Managing race conditions when multiple users bid simultaneously on the same deal. Solution: Implemented optimistic locking with database-level constraints and Redis-based bid queuing to ensure fair and consistent bid processing.
Payment Webhook Reliability
Challenge: Ensuring payment webhooks are processed exactly once, even with network retries. Solution: Implemented idempotency keys, webhook signature verification, and a processing queue to handle retries gracefully.
09 Scalability & Performance
The system uses Redis caching for frequently accessed data, Celery for offloading heavy operations like notification dispatch and report generation, database query optimization with proper indexing, and connection pooling. The architecture supports horizontal scaling of the web and worker tiers independently.
10 Security Considerations
Given the financial nature of the platform, security is a top priority. The system implements JWT-based authentication with token blacklisting, API gateway key verification, rate limiting on sensitive endpoints, CORS policies, secure payment webhook validation, encrypted sensitive data at rest, and comprehensive audit logs for all financial operations.
11 Results & Impact
Adulis is actively serving users in production, facilitating real financial transactions between parties. The escrow system has successfully protected both buyers and sellers, and the bidding engine has enabled competitive pricing for deals. The platform continues to grow with new feature additions and system improvements.