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Tsion Alemayehu

@tsionalemayehu

Message

Senior full-stack engineer modernizing enterprise apps and leading scalable cloud microservices teams.

Ethiopia

Message

What I'm looking for

I want a cloud-first role to modernize enterprise systems into scalable microservices, deliver full-stack features, and lead/mentor teams with strong CI/CD, reliability, and quality.

I’m a Senior Full Stack Software Engineer with over 10 years of diverse experience designing, developing, and maintaining enterprise-grade applications across health, SaaS marketplaces, and procurement. I modernize legacy systems into cloud-first platforms and focus on reliability, usability, and measurable engineering quality.

Most recently, I helped modernize a critical procurement management system by transitioning a legacy desktop application into a cloud-first web platform. Using Angular 13 and .NET Core 6, I built key modules, designed robust backend APIs, implemented secure Azure AD authentication for SSO, and created a data migration pipeline that enabled Power BI integrations.

As a Backend Team Lead for a SaaS gig economy marketplace, I spearheaded a multi-tenant, modular backend architecture with Node.js and .NET, implementing microservices with Dapr and orchestration with Kubernetes. I streamlined CI/CD using ArgoCD and GitOps workflows, mentored and managed backend developers, and drove strong testing discipline—achieving over 70% unit test coverage.

Experience

Work history, roles, and key accomplishments

Current

Contract Software Engineer

Current

Advanced Purchasing Dynamics (APD)

Aug 2021 - Present (4 years 11 months)

Modernized a procurement management system by transitioning a legacy desktop application into a cloud-first web platform. Built Angular 13/.NET Core 6 modules, implemented Azure AD SSO authentication, and created a data migration pipeline enabling Power BI reporting integrations.

.NET Core C ASP.NET Core RESTful APIs Azure AD SSO Power BI Data Pipelines Legacy Modernization

Backend Team Lead

Gebeya Inc

Apr 2023 - Jul 2024 (1 year 3 months)

Led backend architecture and development for a SaaS gig marketplace connecting African freelancers with small businesses. Implemented a multi-tenant modular backend using Node.js/.NET, built microservices with Dapr on Kubernetes, and streamlined CI/CD with ArgoCD GitOps while mentoring engineers to achieve 70%+ unit test coverage.

.NET Microservices Dapr Kubernetes CI CD ArgoCD GitOps Unit Testing Mentoring

Technical Lead

Excellerent Technology Solutions

Jul 2021 - Mar 2023 (1 year 8 months)

Managed the full development lifecycle of a web-based financial application built with .NET and Angular. Led a team of 5 developers, drove sprint planning and retrospectives, and integrated AWS infrastructure with Bitbucket Pipelines for CI/CD to improve scalability and maintainability.

.NET Angular AWS Bitbucket Pipelines CI CD Sprint Planning Agile Application Architecture Maintain

Senior Software Engineer

Excellerent Technology Solutions

Oct 2019 - Jun 2021 (1 year 8 months)

Developed full-stack applications and improved real-time communication within the app by integrating Cisco Jabber with Angular. Implemented ASP.NET Core RESTful APIs, optimized database access using PostgreSQL and MSSQL, and added monitoring with AppDynamics and New Relic.

Angular Cisco Jabber Integration ASP.NET Core REST APIs PostgreSQL MSSQL AppDynamics New Relic Performance Monitoring

Software Developer

John Snow Inc (JSI)

Dec 2014 - Oct 2019 (4 years 10 months)

Participated in the full SDLC for public health and logistics systems. Gathered requirements with stakeholders, built solutions using AngularJS and .NET Core, supported Agile backlog and sprint planning, and maintained deployed applications for continuous availability.

SDLC AngularJS .NET Core Requirements Definition Agile Backlog Management Sprint Planning