Halil Mentes - Senior Game Developer

DEVELOPED GAME FEATURES

Daily Rewards: Daily login bonuses and streak-based rewards
Spinning Wheel & Gacha Mechanics: "luck-based" :) Reward systems such as spinning wheels and gacha boxes
Leaderboard Systems: Leaderboards with filters for global, regional and friend rankings
Player Progression: Designed XP-based leveling systems with unlockable content, skill trees and visual indicators of progress
Limited-Time Events: Seasonal or time-based event structures with exclusive content, unique rules and special rewards
Ad Reward Mechanics: Integrated opt-in rewarded ads into features like revive, double rewards and free spins
Social Systems: Friend list management, online presence and block/report functionalities
In-Game Chat: Real-time text based and emoji only chat with support
Gift Sharing: Send virtual items or daily gifts to friends
Referral & Invite Systems: Friend invite links and referral bonuses
Push Notifications: Personalized in-app and device-level notifications like “Your friend passed you!” or “Event ends in 2 hours”
Tutorial & Onboarding Flows: Interactive tutorial sequences and contextual tooltips
Currency & Economy: Soft and hard currency systems with dynamic pricing, in-game shops and limited-time offers.
Achievements & Missions: Challenge-based task systems with dynamic objectives and milestone tracking
Matchmaking & Lobby:Lobby features such as table creation, seat assignment, and room browsing for multiplayer card and board games.
Inventory Systems: Inventory systems with item sorting, filtering, capacity limits
Deck Building: Deck construction interfaces with validation logic, drag-and-drop UX, and real-time feedback
Session Management: Reconnect logic, AFK detection and timeout behaviors
Consumables: Consumable items like boosters, revives

WORK EXPERIENCE

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Senior Game Developer at Janus Interactive

July 2022 - May 2025

Designed and implemented scalable gameplay systems with a strong focus on data-driven architecture, modularity and maintainability.
Led client-server synchronization for multiplayer gameplay, ensuring deterministic turn-based mechanics, state replication and optimal network performance.
Developed advanced UI systems leveraging MVC, MVVM and Data Binding, allowing designers and developers to work in parallel while maintaining real-time synchronization with server data.
Engineered and optimized game tools for animation, content creation and live game management, improving iteration speed and overall development efficiency.
Integrated physics-based mechanics, procedural animations and complex state-driven AI behaviors, enhancing gameplay depth and player immersion.
Optimized performance across platforms, applying frame debugging, memory profiling and render pipeline optimizations for stable frame rates and minimal resource overhead.
Collaborated closely with design, art and backend teams, ensuring cohesive development workflows and rapid iteration cycles.
Mentored and led junior developers, establishing best practices in coding, debugging and system architecture to enhance team efficiency.

Contributed Projects in Janus Interactive

STORM WARFARE

Store Links: Steam / Epic Games

Gameplay Video

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Game Developer at Digitoy Games

November 2019 - July 2022

Engine & Rendering Optimization: Contributed to the in-house game engine (C, C#), optimizing draw calls, frame buffering and enhancing shader performance for cross-platform stability.
Multiplayer & Client-Server Synchronization: Engineered real-time networking solutions, ensuring seamless gameplay synchronization, packet loss mitigation and server-client consistency across highly active multiplayer sessions.
Live Game Development & Feature Implementation: Led the development and deployment of 8 live multiplayer games, implementing weekly content updates, gameplay features and data-driven features to enhance engagement and retention.
Scalable UI & Developer Tools: Designed highly modular UI frameworks, integrating MVVM architecture, data binding and custom UI tools, streamlining designer workflows and responsive, real-time server interactions.
State-Driven Animation Systems & Interactive Gameplay Elements: Developed 2D animation tools, enabling smooth player interactions, animated UI components and dynamic content rendering.
Game Analytics & Performance Monitoring: Integrated real-time analytics tracking, gathering player behavior insights to optimize monetization strategies, gameplay balance and feature iteration based on live data.