Full-stack Software Developer
I build product-driven mobile and web applications. Product builder
Fast, reliable, and scalable digital experiences.

About
Core focus
Product-focused full-stack software developer building modern web, mobile, and backend solutions.
Strengths
Technology stack
Mobile
Backend & API
Databases & data
Cloud / DevOps
Tools & workflow
Architecture & security
Mobile app showcase
Featured app
Hedefe Koş!
Backend-supported mobile game experience built around decision making, risk management, and progression systems.

LiveHedefe Koş!
Backend-supported mobile game experience built around decision making, risk management, and progression systems.
LiveBillionaire's Chat
Modern social chat app built around community, visibility, and credit-based mechanics.
LiveSignalist
Mobile application developed for learning and translating Morse code.
In progressHook QR
Mobile QR scanning app built for fast event check-in, validation, and field operations.
ChronoSnaps
Content project focused on producing daily history content in short-form video format.
Selected projects
Event Control Center
2024Centralized control system for managing large-scale event operations from a single panel.
Challenge
Handling high traffic, role-based authorization, and real-time data tracking.
Outcome
Operational processes became faster and error rates dropped noticeably.
QR Event Check-in System
2024Mobile event system enabling fast check-in and check-out via QR codes.
Challenge
Offline support, fast scanning, and reliable data synchronization.
Outcome
Queue times decreased and field operations became more efficient.
Offline-first Mobile Queue
2024Architecture that stores data locally when offline and syncs automatically when back online.
Challenge
Resolving data conflicts, ensuring integrity, and maintaining performance.
Outcome
Data loss was prevented and field teams could operate without interruption.
Event Registration Platform
2023Web-based platform that digitizes attendee registration and management processes.
Challenge
Handling large datasets with fast filtering and search capabilities.
Outcome
Manual processes decreased and management became faster.
API Integration Layer
2023Integration layer managing data exchange between systems.
Challenge
Error handling, retry mechanisms, and logging processes.
Outcome
Data flow between systems became more stable and errors decreased.
Admin Reporting Dashboard
2023Admin dashboard providing reporting and analytics.
Challenge
High-performance queries on large datasets.
Outcome
Reporting became faster and decision-making improved.
Notification System
2024Centralized system for managing push, email, and system notifications.
Challenge
Notification ordering, failed deliveries, and retry handling.
Outcome
Delivery success rate increased and the system became more reliable.
Digital Badge System
2023QR-based digital badge system for secure event access control.
Challenge
Security, fraud prevention, and fast validation.
Outcome
Unauthorized access was reduced and entry processes became faster.
Experience
2022 - Present
Full-stack & Mobile Software Developer
Building end-to-end solutions across event technologies, mobile applications, and API-driven systems.
- Analyze business requirements and design scalable technical architectures
- Lead end-to-end development of mobile apps (React Native / Expo) and backend systems (.NET, Node.js)
- Build offline-first architectures and reliable data synchronization systems
- Design and implement QR-based check-in and validation systems
- Optimize performance and scalability for high-traffic systems
- Develop REST APIs and integration services across multiple systems
- Design databases, optimize queries, and ensure data integrity
- Implement real-time data processing and reporting systems
- Ensure high code quality, security, and maintainability
- Build modern, mobile-first, user-centric interfaces
Services
Contact
Direct email
root@esperancajk.com