Ashenafi Alemu A.

Senior Full Stack Developer | Fintech, Payments, Crypto & iGaming I’m Ash, a Senior Full Stack Developer with 6+ years of experience building secure, scalable, and production-grade platforms across fintech, payments, crypto, iGaming, SaaS, and real-time transactional systems. My strongest expertise is in Golang and NodeJS backend engineering, while I also work across the full application stack from APIs, databases, distributed systems, and workflow orchestration to frontend applications and production deployment. I have hands-on experience building payment gateways, crypto and fiat platforms, multi-currency wallets, transaction ledgers, remittance systems, POS/Soft-POS solutions, online casino platforms, and high-volume real-money systems where security, accuracy, reliability, and performance are critical. My core technologies include Golang, Temporal, PostgreSQL, Kafka, RabbitMQ, REST, gRPC, microservices, event-driven architecture, Docker, and Azure DevOps. I also use modern AI development tools such as ChatGPT, Claude, Cursor, and AI-assisted engineering workflows to improve development speed, testing, automation, and code quality. I specialize in designing systems with strong financial correctness, idempotency, fault tolerance, auditability, retries, concurrency handling, and scalable architecture. I’m comfortable taking ownership of products from architecture and database design through implementation, integration, deployment, optimization, and production support. Available for long-term, contract, and contract-to-hire opportunities, with 30+ hours per week availability.