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Build logs + playbooks

Web3 automation, serverless microservices, and backend performance notes.

Nov 27, 2025·5 min read

Getting Started with Cloudflare Workers and h3

Spin up a typed API on Cloudflare Workers using the h3 framework, Wrangler, and a few minutes of setup.

Cloudflareh3TypeScriptServerlessTutorial
Jan 12, 2025·1 min read

Automating Uniswap V3 Liquidity with Node.js Lambda

Architecting a resilient rebalancer using the Uniswap V3 SDK, AWS Lambda, and CloudWatch Events.

Web3ServerlessNode.js
Aug 03, 2024·1 min read

Scaling Microservices on AWS with Event-Driven Concurrency

Design notes from rewiring AffCollect into a message-driven mesh that processed affiliate statements 10x faster.

MicroservicesAWSKafka
Sep 18, 2023·5 min read

Mastering Concurrent Scraping: Orchestrating BullMQ, Puppeteer, and Redis for High-Accuracy Data Aggregation

Discover how we scaled affiliate commission scraping to handle hundreds of merchants with 99% accuracy and 10x faster aggregation, using a robust concurrency setup that turned chaotic dashboards into reliable insights.

BullMQPuppeteerRedisWeb ScrapingConcurrencyAutomation

Ephrem Demelash

Backend · Web3 · Systems Design

Building performant liquidity automation, affiliate intelligence, and data-rich SaaS for ambitious teams across Addis Ababa and beyond.

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© 2025 Ephrem Demelash. Crafted with Next.js 16, Tailwind, and a love for resilient systems.

Always shipping / Addis ↔ Remote