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Gameplay Systems Engineer specializing in Unreal Engine C++ gameplay development and Unity C# programming. I build scalable gameplay systems, multiplayer features, AI behaviors, and modular game architecture. I work best on projects where strong engineering structure matters — designing systems that are modular, maintainable, and built to scale as a game grows. My work often sits at the intersection of gameplay, networking, and technical design, helping teams move from prototype systems to scalable production gameplay architecture. Recently I’ve been working on multiplayer gameplay architecture in Unreal Engine, building subsystem-driven gameplay frameworks, AI systems, and progression systems designed for multiple game modes and long-term expansion. I collaborate closely with designers, artists, and producers to turn ideas into stable, performant gameplay features that feel great to play. What I Can Help With: Unreal Engine: - Gameplay systems (C++) - Multiplayer architecture & replication - Game modes, GameState / PlayerState systems - AI systems (Behavior Trees, State Trees, perception) - Subsystem architecture & modular gameplay frameworks - Performance optimization Unity: - Gameplay programming (C#) - Mobile game development - UI systems - Addressables & asset pipelines - Performance optimization General Game Engineering: - Game prototypes - Gameplay mechanics implementation - System architecture & refactoring - Debugging and performance tuning - Technical design support How I Work: - Clear communication and fast iteration - Strong engineering foundations - Clean, maintainable systems Services: - Unreal Engine gameplay programming - Unreal Engine C++ development - Multiplayer gameplay systems - Unity gameplay programming - Game mechanics implementation - AI behavior systems If you need a developer who can design and implement robust gameplay systems, I’d be happy to discuss your project.

I specialize in data-driven software development with a focus on analytics systems and simulations. With three years of educational experience, I've collaborated on diverse projects, including designing a comprehensive SQL database for Formula 1 performance analytics covering over 692K records and creating a Java application for real-time queries. I also developed an event-driven airport runway simulator in C++, mastering the intricacies of scheduling and data management. My strong technical skills in Java, C++, and SQL, combined with my hands-on project experience, enable me to deliver efficient, high-quality solutions that enhance functionality and user experience. If you need a detail-oriented programmer who excels at transforming complex data into actionable insights, let's discuss how I can contribute to your projects.

Top 0.01% nationally; 2nd in Canada, repeated top-20 finishes in programming, mathematics, and physics competitions. $1M+ earned, 100% Job Success, 7,600+ hours, average engagement 330+ hours. I build production AI inside real products, especially Rails/Python systems that need more than a demo. • Multi-LLM failover across Claude / GPT / Grok - 99.9% uptime, zero dropped requests • PGVector RAG 5-10x faster than hosted APIs, embedded in Active Record • AI contract parser shipped in 3 weeks with OCR fallback and source-document backlinks • 1M-row pipeline cut from 90 minutes to 30 seconds for an industrial dashboard where downtime costs millions 25 years shipping software: Rails 15 years, Python 8 years, Node, .NET, PostgreSQL/vector search, F#, Clojure, Scala, C/C++, scraping, and data pipelines. Former CTO: grew a company 12x from $20K/mo to $250K/mo, hired engineers, set direction, and still wrote the hard code. Send me the product, the stack, and what the AI needs to do. I respond fast and only take projects with a clear path to value.

- Perform data analysis with high complexity in support of ad-hoc customer requests and new customer onboarding. - Work with customers to define requirements and ensure designs meet the business objectives. - Develop SQL and SAS queries and reports for analyzing and presenting data. - Experience with computer programming languages: Java, C#, VB6, VBA, HTML & CSS and JavaScript. - Experience with SharePoint. - Experience with Microsoft Access, Microsoft Word, Excel and Power Point - Experience with data scraping using Scrapy (Python web-crawling framework)

I am a skilled and experienced programmer with a strong background in Python (Django, Flask), HTML/CSS, and PHP/MySQL development. With 5+ years of hands-on experience in web development, I have successfully delivered a wide range of projects, from creating dynamic web applications to optimizing database performance. My expertise extends to designing and implementing robust backend systems, crafting intuitive user interfaces, and ensuring seamless database integration. Whether you need a custom web application, database optimization, or frontend development, I have the technical proficiency and problem-solving abilities to deliver high-quality solutions on time and within budget. I am dedicated to providing clients with reliable and efficient programming services, tailored to their specific needs.

Good day and thank you for viewing my profile! I am professional and full time freelancer (7+ years), reliable, flexible and aim oriented person, so you can be sure your project will be completed in time and top quality. In my work i am mostly using: BEM, HTML5, CSS3, Sass(Scss), Less, JavaScript, JQuery, Adobe Photoshop, Bootstrap, Slim, Sublime Text, Vstudio, GIT, Zeplin, Figma, Invision, Gulp, Prepros etc. I can work in your timezone working hours if needed. Also if you have some interesting and new things for me to study and work on - i am ready! At the end you will get w3c valid, semantic, structured and well commented code, seo friendly, pixel-perfect to layouts/mockups (if designs are perfect themselves). Please notice that I am not a web designer. Unfortunatelly I can't create a design for you. Feel free to contact me for advice or a consultation, i will be glad to help you! Thank you for having time to look at my profile. Hopefully we can work together. Best regards, Zhan