Haylemichael Tsega
@haylemichaeltsega
Senior Full-Stack engineer building high-throughput distributed FinTech systems with cloud-native microservices.
EthiopiaWhat I'm looking for
I’m a Senior Full-Stack engineer with 5+ years of production experience architecting high-throughput distributed systems for real-time financial platforms. I specialize in Node.js, TypeScript, and AWS server-less infrastructure, delivering mission-critical Fin-tech capabilities like automated reconciliation engines, payment gateways, and regulated banking platforms.
In my current role, I architect serverless back-ends on AWS Lambda and API Gateway and build event-driven pipelines to ingest, validate, and route financial webhooks—optimizing cold starts and improving latency at peak load. I also deepen performance with Redis-backed caching, design secure multi-tenant SaaS with strict API security, and bring a mentoring mindset from teaching and coaching developers.
Experience
Work history, roles, and key accomplishments
Senior Full-Stack Engineer
EagleLion System Technology
Feb 2025 - Present (1 year 6 months)
Architected a serverless AWS back end for a banking super app, including real-time event processing pipelines and Redis-backed performance optimizations. Built and delivered internet banking and agency banking APIs and an automated reconciliation system to reduce settlement cycle time.
Independent Full-Stack Developer
Independent
Jan 2024 - Present (2 years 7 months)
Delivered freelance full-stack work across real-time geolocation and multi-tenant SaaS systems. Built event-driven back-end services, real-time dashboards with WebSocket updates, and secured multi-tenant APIs with JWT-based access control.
Full-Stack Engineer
Addispay Financial Technology
Jan 2024 - Feb 2025 (1 year 1 month)
Built transaction monitoring dashboards for a payment gateway, enabling operations teams to track and action large volumes of transactions with real-time visibility. Secured payment gateway APIs with layered protections including JWT tokenization and HMAC request signing, and improved dashboard performance via code-splitting and lazy loading.
Code Coach & Technical Instructor
Code Jika
Jan 2022 - Jan 2023 (1 year)
Mentored and coached aspiring developers through structured web development curricula and project-based learning. Delivered workshops focused on industry-standard Git workflows, code review practices, and agile development habits to support job-readiness.
Education
Degrees, certifications, and relevant coursework
Addis Ababa Science and Technology University (AASTU)
Bachelor of Science in Electrical and Computer Engineering, Electrical and Computer Engineering
Grade: 3.81 / 4.00
Earned a Bachelor of Science in Electrical and Computer Engineering at AASTU, with a cumulative GPA of 3.81/4.00.
University of the People
Associate of Science in Business Administration, Business Administration
2019 - 2021
Completed an Associate of Science in Business Administration through University of the People (2019–2021).
Tech stack
Software and tools used professionally
Availability
Location
EthiopiaAuthorized to work in
Portfolio
haile-dev-portifoli.vercel.appJob categories
Skills
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