Sewlesew Biazen
Full-Stack Web Developer | MERN & .NET Expert | Building Scalable, Secure, and User-Friendly
Applications for Businesses
https://linkedin.com/in/sewlesew-biazen-sfd
https://sewlesewbi.netlify.app
https://github.com/SEWLESEWBIAZEN
Addis Ababa, Ethiopia
Professional Profile
I’m a Full-Stack Web Developer with 3+ years of experience delivering scalable, user-friendly
applications. I specialize in both MERN (MongoDB, Express, React, Node.js) and .NET (ASP.NET Core,
C#, SQL Server), enabling me to build versatile solutions. I help startups and businesses create
powerful, fast, and secure web applications — from full products to optimized features. With a focus on
clean architecture, responsive design, and performance, I deliver solutions that drive growth and
enhance user experience.
Recent Projects:
Gojo – US-Based Ethiopian Restaurant Website
• Boosted online reservations by 40% with a custom booking system and dynamic daily menus.
• Increased customer engagement through interactive carousels and image-rich dish catalog.
• Enabled staff efficiency with an admin dashboard to manage menus, reservations, and gallery
content.
FluentQuest – AI-Powered Language Learning Platform
• Designed multi-level courses with real-time feedback, improving learner retention by 35%.
• Built instructor tools for lesson uploads, quizzes, and challenges, reducing manual setup by 50%.
• Developed progress tracking dashboards used by 1,000+ learners to visualize achievements.
Legal Office Document & Task Management – Ethiopian Airlines
• Reduced manual processing by 60% via automated document workflows and case tracking.
• Implemented secure APIs (.NET + SQL Server) with real-time analytics and contract e-signing.
• Built responsive Next.js 15 frontend, improving collaboration across 200+ legal staff.
Bankify – Secure Authentication with Role-Based Access
• Developed JWT-based login and claims-based authorization ensuring strict data privacy.
• Improved security compliance by 100% while maintaining a seamless user experience.
• Implemented scalable role management with .NET Core Identity for admins and customers.
Stripe Subscription Integration with Feature Gating
• Designed subscription tiers (Basic, Pro, Enterprise) with dynamic feature access, boosting MRR by
30%.
• Built feature-flag system enabling seamless upgrades/downgrades without service downtime.
• Integrated Stripe with React/Node.js for secure payments, improving monetization scalability.
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Experience:
Ethiopian Airlines Group(ETAG)
Software Developer
Apr 2024 - July 2025
• Built end-to-end web apps with .NET, React, and MS SQL, improving data processing efficiency by
40%.
• Partnered with senior engineers to deliver scalable software, reducing deployment time by 30%.
• Enhanced SAP modules via RFC integration and report programming, cutting manual tasks by 50%.
• Boosted ERP system performance while developing enterprise apps, ensuring 99% uptime.
Addis International Bank(ADIB)
Trainee Software Developer
Dec 2023 - Apr 2024
• Boosted customer satisfaction by 15% for both account holders and external users.
• Improved accessibility and UX to double the customer base.
Freelance
Full-stack Developer
Jun 2023 - July 2025
• Built custom website for a US-based Ethiopian restaurant, enhancing online presence and
customer engagement.
• Built a desktop app for AAU that automated nationwide seismic data management.
• Delivered a data-driven solution improving earthquake tracking/analysis by 60%.
Amhara Bank
Intern Software Developer
Jan 2023 - Feb 2023
• Revamped bank's currency display app with brand-aligned design, boosting readability and UX by
25%.
• Mastered Git, Postman, and DevOps through collaboration with senior engineers
Education:
Addis Ababa University
• Computer Science (Bachelor's | Undergraduate Degree)
****Great Distiniction****
• Addis Ababa, Ethiopia
Oct 2019 - Jul 2023
Technical Skills:
• Languages: C#, JavaScript(TypeScript), Python, C++.
• Frameworks: ASP.NET Core, Node.js, Express.js, React.js, Next.js, Tailwind CSS.
• Database: PostgreSQL,MS SQL Server, MongoDB.
• Cloud: Azure, Supabase, Firebase.
• Tools & Others: Redis, RabbitMQ, gRPC, Git, Azure DevOps, Postman, VS Code, Visual Studio, Docker.
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What I Can Help You With:
• End-to-End Full-Stack Web Application Development
• Custom, SEO-Optimized Websites that Boost Visibility and Deliver Exceptional User Experiences
• Interactive Admin Dashboards & Scalable Internal Tools
• Secure API Development and Seamless Third-Party Integrations
• Robust Authentication Systems with Role-Based Access Control
• Payment Gateway Integration (Stripe, PayPal, etc.)
• Performance Optimization for Speed, Scalability, and Mobile Responsiveness
• Rapid Prototyping & MVP Development for SaaS, EdTech, and Startup Platforms
Who I Work With:
• Early-stage startups needing an MVP
• SaaS platforms that need dashboards and subscriptions
• Non-tech founders looking for technical execution
• Educational platforms needing course, payment, and user systems
I look forward to the opportunity to discuss how I can contribute to your projects and startups. Please
feel free to contact me for any inquiries or project discussions.
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