$ whoami
Ephrem Bayru
Software Architect & Tech Lead
I design systems, lead engineering teams, and stay close to the code.
focus.txt
Fintech
Payments & Stripe integrations · Financial ledgers · Digital lending · Identity & KYC
iGaming
Casino integrations · Sportsbook platforms
Blockchain
Smart contracts · Token standards · Wallet & platform integrations
philosophy.md
- System architecture
- Technical leadership
- Hands-on engineering
From technical direction to production delivery.
// experience.log
Selected experience
Career notes, presented as a log.
Expertly
Software Architect & Tech Lead
- Casino & sportsbook architecture
- Technical direction & engineering delivery
Gaming Innovation Group
Senior Software Engineer
- Sportsbook interfaces & performance
- Code quality & release engineering
Excellerent
Senior Full-Stack Web Developer
- Event-driven services & full-stack delivery
- Team leadership & AWS delivery
Engineering
Architecture
- Microservices · Distributed systems
- Event-driven architecture · Event sourcing
- Domain-driven design · CQRS
Services & Integration
- Node.js · NestJS · .NET Core
- REST · GraphQL · gRPC
- WebSockets · Background processing
- Authentication · Authorization · API gateways
Application Platforms
- React · Next.js · TanStack
- Angular · Vue.js · Astro
Data & Event Infrastructure
- PostgreSQL · SQL Server
- MongoDB · Document databases
- Redis · Elasticsearch
- Kafka · RabbitMQ
- EF Core · Prisma · TypeORM · Drizzle
Blockchain & Smart Contracts
- Solidity · Ethereum / EVM
- ERC-20 · ERC-721 · ERC-1155
- Hardhat · Foundry · OpenZeppelin
- ethers.js · viem · Wallet integration
Platform & Operations
- Docker · Kubernetes
- AWS · Cloudflare · Terraform
- CI/CD
- OpenTelemetry · Prometheus · Grafana