Open to opportunities

abolfazl aslani

@abolfazlaslani

Message

I build reliable crypto payments, custody, wallet, and iGaming settlement infrastructure.

Iran

Message

At RoundTableApps, I build backend infrastructure for Chancer.bet and Clutch, including Fireblocks custody, multi-currency wallet ledgers, bonus systems, casino and sportsbook settlement, and crypto futures.

I've led the technical design of a casino platform used across 40,000 wallets, owning financial reconciliation, payment integrations, and idempotent processing for bet, win, rollback, deposit, and withdrawal flows. I also built live tick-price streaming and ordered settlement with Redis Streams to prevent transactions against stale prices.

Previously, I built payment and student-management modules at Cando IT Institute, including asynchronous BullMQ workflows across approximately 40,000 records.

At Partomart and Lahzecard, I designed pricing, ingestion, wallet-crediting, GraphQL, and transaction-management systems. I focus on transactional correctness under concurrency: reconciliation, race-condition handling, ordered settlement, and eliminating duplicate payouts.

Experience

Work history, roles, and key accomplishments

Current

Back-End Developer

Current

RoundTableApps

Mar 2025 - Present (1 year 5 months)

Backend for crypto casino and sportsbook platforms, including custody, wallets, bonus systems, and crypto futures. Technical design authority for the casino platform, defining code structure and data models for features implemented by other engineers.

Back-End Developer (Contract)

Cando IT Institute

Jan 2025 - Dec 2025 (11 months)

Integrated payment gateways with idempotent transaction processing and reconciliation guarantees, and built financial modules for tuition, online payment, invoicing, and transaction tracking. Extended Microsoft Dynamics CRM into a student and instructor management portal.

Payment Gateways Idempotent Processing Reconciliations Microsoft Dynamics CRM BullMQ TypeScript NestJS PostgreSQL MongoDB Redis

Back-End Developer

Partomart

Jun 2024 - Mar 2025 (9 months)

Designed a configurable pricing engine combining supplier inventory, competitor price feeds, and internal stock to produce final prices in under 3 seconds. Architected a parallel ingestion pipeline processing supplier data, media assets, and pricing intelligence concurrently.

TypeScript NestJS Express WebSockets PostgreSQL MongoDB Redis Domain Driven Design SOLID Hexagonal Architecture

Back-End Developer

Lahzecard

Jun 2023 - Jun 2024 (1 year)

Built the gift card redemption flow end to end, including validation, transaction management, and wallet crediting with transactional consistency. Developed GraphQL APIs and a Telegram Bot based admin moderation workflow.

GraphQL TypeScript NestJS PostgreSQL MongoDB Redis Telegram Bot API