Yasin A.
Full-Stack Developer specializing in Backend Architecture with a passion for building scalable applications and AI-integrated tools.
About Me.
I'm Yasin, also known as Yashinu — a 22-year-old developer from Turkey with a fervent drive for self-improvement. I specialize in backend architecture, building scalable SaaS applications and AI-integrated tools with TypeScript, NestJS, and cloud technologies.
Currently working as a Full-Stack Developer at sixtynine.digital while pursuing degrees in English Translation & Interpreting at Cag University and Computer Programming at Anadolu University. My multilingual background (Turkish, English, Japanese) gives me a unique perspective in global software development.
With 50+ delivered projects — from enterprise e-commerce platforms and ERP systems to email infrastructure, cross-platform mobile apps, RESTful APIs, and community platforms — I enjoy turning complex problems into elegant, performant solutions.
I work AI-first in my engineering workflow — leveraging tools like Claude Code, Cursor, and Antigravity to move quickly — but everything ships through deliberate architecture, code review, and testing. For me AI is a force-multiplier on top of strong fundamentals, not a replacement for them.
Experience.
Work
Full-Stack Developer
sixtynine.digital
Rotterdam, Netherlands (Remote)
Full-stack development across production systems — a modular e-commerce platform (NestJS, Directus, BullMQ), an email delivery platform (AWS SES, MJML, Drizzle), a retail ERP, and a cross-platform mobile app rebuilt in .NET MAUI. Responsible for backend architecture, queue/worker pipelines, frontend interfaces, and deployment.
Software Developer
Freelance
Delivering custom software solutions including RESTful APIs, dynamic websites, and automation bots for diverse international clients. Managed full project lifecycles with 99.9% service uptime.
Backend Developer
Voco Technology
Ankara, Türkiye (Remote)
Engineered scalable server-side applications with NestJS and AWS Lambda. Implemented Redis caching strategies reducing database load by 30% and optimized API endpoints for high-volume traffic.
Education
Cag University
Bachelor's — English Translation & Interpreting
2022 — 2027
Anadolu University
Associate's — Computer Programming
2023 — 2025
Skills.
Languages
Backend
Frontend
Mobile
Databases
DevOps & Tools
AI-Augmented Development
Projects.
Featured work and open source contributions.
Featured
Janice — E-Commerce Platform
A full-stack e-commerce platform built at sixtynine.digital. I engineered a modular NestJS backend (catalog, checkout, orders, invoicing, returns & exchanges) on top of a Directus headless CMS, alongside a Next.js admin dashboard and customer storefront. Built async order pipelines with Redis & BullMQ and integrated payment, shipping, and MeiliSearch-powered catalog search.
Sixtynine Email Platform
A transactional and marketing email platform built at sixtynine.digital. Features a drag-and-drop MJML template editor with Handlebars templating and a BullMQ-powered worker for scalable delivery through AWS SES, plus campaign analytics, rate limiting, and Stripe billing.
ÇiçekGaraj ERP
Contributed to a retail ERP platform at sixtynine.digital, handling inventory, catalog, orders, and invoicing. A Next.js + MUI frontend backed by a Directus and PostgreSQL data layer, with MeiliSearch catalog search and AI-assisted features.
Field-Service Mobile App
A sixtynine.digital project: rebuilt a cleaning-services field-operations mobile app from scratch, migrating it from Xamarin.Forms to .NET MAUI. Offline-first architecture with local storage, OAuth/OIDC authentication, and on-site quality-assurance data collection across iOS and Android.
Voco — Social Platform
A hobby-based social platform at Voco Technology that connects people around shared interests with AI-assisted matching. As a backend developer I built the NestJS + TypeScript microservices — a real-time chat service (Socket.IO with a Redis adapter for horizontal scaling), a geospatial activity/feed service (MongoDB GeoJSON), and a Fastify-based authentication & payments service — with Redis, BullMQ queues, and AWS SQS, deployed on AWS Elastic Beanstalk.
NEXUS 2026 Conference Platform
Website and abstract-submission system for NEXUS 2026, an international English Language Teaching & Translation conference co-hosted by Çağ University and Cappadocia University. I built the public site (themes, speakers, program, registration) and a multi-step paper-submission workflow.
Serendia Squad
A developer community platform with custom OAuth2 authentication, secure RESTful API, and a performant SSR frontend for code sharing among users.
EloBoost Marketplace
A secure marketplace platform with robust transaction system for high-volume service exchanges, featuring transactional integrity for payments and refunds.
Purgecord
An open-source userscript (Tampermonkey/Violentmonkey) to bulk-delete your own Discord messages and DMs. A hardened, undiscord-based rewrite with a Bulk DM mode, message filtering (author, content, links, regex, date ranges), dry-run, resumable sessions, adaptive rate limiting, streamer mode, and a bilingual EN/TR UI. Built with esbuild and Node's test runner.