Open to opportunities

Yohannes Tesfaye

@yohannestesfaye1

Message

I build scalable .NET microservices, cloud APIs, and enterprise integrations.

Ethiopia

Message

What I'm looking for

I'm looking to build scalable cloud-native systems, high-throughput APIs, and secure enterprise integrations with cross-border remote teams, particularly in fintech, ERP, healthcare, and digital transformation work.

I've delivered scalable .NET 8 microservices and ERP backend systems at Semay Software, using Clean Architecture, CQRS, MediatR, Redis, Keycloak, Docker, Kubernetes, and GitHub Actions.

For Broekman Logistics, I modernized warehouse-management integrations for a major supermarket network, connecting legacy WMS systems with Kewill S4 and SAP through ASP.NET Core REST and gRPC APIs. I also migrated a mission-critical forecasting subsystem from Azure to AWS using Lambda, API Gateway, SQS, RDS, and Terraform.

At JSI DHA, I built backend components for nationwide public healthcare infrastructure, including hospital logistics, asset distribution, and drug traceability. I created Kafka-based integration workflows, worked with PostgreSQL schemas, led code reviews, and provided tier-3 support.

I'm focused on reliable distributed systems, high-throughput APIs, secure integrations, and automated cloud delivery for fintech, ERP, healthcare, and enterprise platforms.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Developer

Current

Semay Software

Dec 2024 - Present (1 year 8 months)

Architected and delivered a scalable microservices-based ERP backend using .NET 8, executing Clean Architecture and CQRS patterns via MediatR. Designed and secured distributed HR and Financial modules utilizing Keycloak with granular RBAC, and engineered distributed caching layers via Redis.

.NET 8+C#Clean Architecture CQRS MediatR Keycloak OIDC JWT RBAC Redis Quartz.NET Docker Kubernetes GitHub Actions CI CD

Senior Software Engineer

Broekman Logistics

Sep 2022 - Dec 2024 (2 years 3 months)

Spearheaded digital transformation initiatives for a major enterprise supermarket network, modernizing legacy Warehouse Management Systems with Kewill S4 and SAP pipelines. Engineered robust gRPC and REST-ful API integration infrastructure using ASP.NET Core, and implemented cluster-wide caching topologies using Redis.

ASP.NET Core gRPC REST Redis AWS Lambda API Gateway RDS Terraform Datadog SonarQube

Senior Software Engineer

JSI DHA

Nov 2022 - Dec 2023 (1 year 1 month)

Designed foundational application components for nationwide public healthcare infrastructure, managing backend modules for hospital logistics and drug traceability. Constructed secure ASP.NET Core service layers built on CQRS architectures, and built an event-driven integration bridge backed by Apache Kafka and Quartz.NET.

ASP.NET Core CQRS JWT Kafka Quartz.NET PostgreSQL ETL Integration Testing