Ümit YasinÇoban
Full-Stack & Mobile Developer building production mobile apps, Java/Spring Boot services, AI automation workflows, browser automation systems, and cloud-ready web platforms.
Technologies I
work with
Skill Proficiency
Professional
journey
Software Developer
Popleads
Building and maintaining production mobile applications, backend services, web platforms, browser automation systems, CRM products, and e-commerce solutions. Recent work spans Java 8-25, Spring Boot, Spring AI, OpenAI structured outputs, React Native, NestJS, PostgreSQL, AWS, Docker, webhooks, queues, virtual threads, and legacy Java/JSP systems.
Software Developer
Alsay Bilgi Teknolojileri
Supported software development, business process analysis, requirements gathering, workflow documentation, and technical specification preparation while collaborating with business and technical stakeholders.
Engineering solutions
that scale
4+
Years Experience
Java 8-25
Backend Range
10K+
Mobile Downloads
I'm a Full-Stack & Mobile Developer focused on turning product requirements into maintainable web, mobile, backend, and automation systems. My strongest day-to-day stack is Java, Spring Boot, React Native, React, TypeScript, and PostgreSQL.
Recent work includes Java 21 and Java 25 services with Spring AI, OpenAI structured outputs, message queues, webhooks, virtual threads, browser automation, Jsoup, and Unipile, while also maintaining mature Java 8, JSP, jQuery, and CRM systems.
I've shipped personal mobile products such as Competitive Sudoku, which reached 10K+ downloads, and contributed to production e-commerce, consent management, Chrome Extension, gamification, translation, and AI-powered social automation platforms.
Core principles
AI, mobile, and backend
systems in production
L3RN Tech Social Account Service
AI-powered LinkedIn automation and social account processing service built with Java 25, Spring Boot, Spring AI, OpenAI structured outputs, Unipile, browser automation, Jsoup, queues, webhooks, and virtual threads.
L3RN Tech Translation Service
Java 21 Spring Boot microservice providing reusable translation workflows through Tarjama API integration, service orchestration, external API communication, and resilient error handling.
Competitive Sudoku
Cross-platform mobile Sudoku product published on App Store and Google Play with 10K+ downloads, five difficulty levels, leaderboards, smart hints, multilingual support, Firebase, and AdMob.
Neon Orbit / Space Drill
Unity-based mobile arcade game with supporting backend and product web pages, combining C# gameplay development with Spring Boot API work and mobile release workflows.
More Projects
Krafttausch
Cloud-based e-commerce and loyalty platform for a Swiss business partner with NestJS, GraphQL, PostgreSQL, Stripe, Twilio, Firebase Cloud Messaging, AWS ECS, S3, and Docker.
İzinver
Enterprise consent and permission management platform compliant with Türkiye's IYS regulations, using Java 11, Spring Boot, REST APIs, Angular, JWT, MySQL, and SMS workflows.
Popleads Chrome Extension
CRM-integrated Chrome Extension built and maintained with Manifest V3, service workers, content scripts, Chrome APIs, permissions, UI components, and scraping workflows.
Popleads CRM
Full-stack CRM platform built on a proprietary Java 8 framework with Java, JSP, jQuery, JDBC, MySQL, REST APIs, user management, and related mobile/web integrations.
Mytoz
Gamified reward and e-commerce platform using Java/JSP full-stack development, point-based shopping workflows, PayPal, BigBuy fulfillment, AdMob, and MySQL.
What people
say about me
“Yasin ile çalışmak gerçekten keyifliydi. React Native projemizi zamanında ve beklentilerin üzerinde teslim etti. Kod kalitesi ve problem çözme yaklaşımı etkileyiciydi.”
M. K.
CTO at Tech Startup
Let's build something
amazing together
Have a project in mind? I'd love to hear about it. Let's discuss how we can work together.
Based in
Turkey 🇹🇷
Available for remote work worldwide