dinar

DeFi protocol - is an intent-based DeFi vault protocol for cross-chain asset management and yield optimization. • Contributed to the development of an intent-based DeFi protocol with a clear separation between intent, execution, and vault logic. • Deployed, debugged, and improved Solidity vault smart contracts using Hardhat, focusing on deposit/withdraw flows and share accounting. • Wrote comprehensive JS tests covering all smart contracts of the protocol.

• Launched the company’s credit platform from scratch (CASH, PDL, POS, BNPL), covering scoring, limits, payments, bank integrations, and full loan origination workflows • Built multiple critical high-load Go microservices (accounting, limits, payments, gateway, scoring etc.) using design patterns and Go’s concurrency features (goroutines, channels), as one of the key engineers driving the platform to production • Optimized Redis-backed limits service by increasing max RPC concurrency and scaling pods with Argo CD, boosting throughput from 1200 to 2500 RPC per second. • Implemented backend-side input validation, reducing unnecessary scoring requests and lowering infrastructure load • Optimized SQL queries in limits and contracts services, reducing response times by ~1.5–2x • Migrated limit processing to an asynchronous model, significantly accelerating limit retrieval for end users • Integrated Kafka with producer-consumer, exponential retries and DLQ, ensuring fault-tolerant message delivery across services • Developed a Telegram monitoring bot and an internal Go-package for logging, enabling real-time alerting and better issue visibility • Implemented Temporal to orchestrate complex workflows, improving system reliability, maintainability, and delivery speed • Introduced Airflow (Python) and built an ETL pipeline for transferring product data into the DWH, improving analytics and risk-assessment capabilities • Performed load testing with k6, validating platform stability under tens of thousands of requests per minute • Created and maintained numerous SQL/Liquibase migrations and contributed to database schema design across core microservices • Managed infrastructure via Docker, Argo CD, and CI/CD pipelines, writing and maintaining deployment configurations • Implemented WebSocket-based callbacks instead of REST to reduce latency between internal services

Built and integrated a session test-data microservice (ASP.NET Core) with async processing, validation, Nginx, RabbitMQ, and the data warehouse; established a full testing flow to ensure seamless platform integration.