Robert Lehmann
Verified Expert in Engineering
Full-stack and Unity3D Game Developer
Robert is a passionate gamer, experienced director of engineering, and blockchain enthusiast with 10+ years of professional experience and a bachelor's degree in game design. He has developed two multimillion-dollar-grossing games in Unity3D, published on Google Play and the App Store: Solitaire Showtime and Mahjong City Tours, which has over 25 million downloads. Robert has also developed unique smart contracts and dApps across different blockchains.
Portfolio
Experience
Availability
Preferred Environment
Unity, React, Amazon Web Services (AWS), Gaming, Unity3D, Virtual Reality (VR), Unity SDK, Technical Design, Technical Architecture, Payment APIs, CTO, Full-stack, Firebase, Mobile Development, Analytics, Google Analytics, Python, C#, .NET, Bots, Discord Bots, Telegram Bots, AWS Lambda, WebGL, MMORPGs, Serverless, Back-end, Source Code Review, Code Review, AWS Cloud Architecture, 3D Games, C++, Games, Amazon DynamoDB, Amazon S3 (AWS S3), Web Security, Web Scraping, Unity2D, Mobile Games, Unity3D Native Plugin Interface, JSON, DevOps, Mobile Apps, 2D, WebView, User Authentication, Cryptocurrency Wallets, MetaMask, Blockchain, API Integration, Integration, C#.NET, Lambda Functions, Game Development, Gameplay Development, Mobile App Development, Google Play Store, Non-fungible Tokens (NFT), Smart Contracts, RPG, Gamification, Mathematics, Cross-platform App Development, Vercel, Rust, Crypto, Apache Kafka, OpenAI GPT-3 API, OpenAI GPT-4 API, OpenAI, ChatGPT, Character Rigging, Google Bard, Blockchain & Cryptocurrency, ERC-1155
The most amazing...
...thing I've developed is Mahjong City Tours, a mobile game with over 25 million downloads on Google Play and the App Store.
Work Experience
Associate Director, Engineering
Jam City
- Built client applications for Mahjong City Tours and Solitaire Showtime in Unity3D, including native-level requirements, such as ads and mobile notifications.
- Developed the back end for Mahjong City Tours and Solitaire Showtime as a serverless application within AWS (Lambdas, DynamoDB, etc.) combined with other services like Firebase.
- Set up the overall pipeline for the Berlin Studio, including automated client builds per merged Git patch sets with distributions to test users and a simple interface for engineers to deploy personal back ends using AWS CloudFormation.
- Identified and fixed memory leaks across the front end and back end (Node.js) to decrease user-facing issues and reduce the overall costs of services.
- Developed an in-house solution for LiveOps, including an easy-to-use interface for the PM and handy ways for artists to deploy on-demand assets into the LiveOps pipeline for later use, such as offers.
- Built analytical tracking mechanisms and dashboards to analyze the overall performance of any product using Databricks and SQL.
- Implemented 3D Secure 2.0 authentication for MasterCard to increase the security of online transactions and comply with industry standards.
- Oversaw a split system where the client (mobile app) was doing transactions. Fetched the challenge data per HTTPS request and sent it to our back end for further validation, where we checked it with the 3D secure vendor data.
- Implemented various Visa APIs like Visa Payments Processing APIs to enable direct credit card payments for both mobile and web applications.
- Ensured seamless transitions as an adept at the Maya-to-Unity animation pipeline. My profound expertise in Unity's animation systems centers on character animation, enhancing gameplay realism.
Experience
Mahjong City Tours
https://www.jamcity.com/game/mahjong-city-tours/Solitaire Showtime
https://www.jamcity.com/game/solitaire-showtime/Equity Token
https://equitytoken.finance/The Equity dashboard provides easy, user-friendly options to review or change contract-related data based on the connected wallet.
Vault
https://www.vault.technology/Skills
Languages
C#, JavaScript, SQL, HTML, CSS, TypeScript, Swift, Python, PHP, C++, C#.NET, Kotlin, HTML5, Java, Groovy, RPG, XML, ECMAScript (ES6), Objective-C, Sass, GraphQL, Snowflake, Dart, Visual Basic, C++/CX, Solidity, Go, Rust
Frameworks
Unity, Unity3D, .NET Core, .NET, Next.js, ASP.NET MVC, Unity2D, React Native, Express.js, Material UI, Unreal Engine, Flutter, NestJS, Angular, Android SDK, ASP.NET, ASP.NET Core, PixiJS, iOS SDK, Photon Unity Networking (PUN), Photon, Swagger, OAuth 2, ARKit, Unreal Engine 4, Django, Grails, Blueprint, Laravel, Tailwind CSS, Redux, Jest, gRPC, Ruby on Rails (RoR), Bootstrap, Svelte, Parity Polkadot
Libraries/APIs
React, Node.js, WebGL, REST APIs, Google Calendar API, AWS Amplify, D3.js, Social APIs, Exchange API, jQuery, Twilio API, WebRTC, Web3.js, Binance API, OpenAPI, Vue, Chart.js, Plaid API, Twitter API, Shopify API, PostgREST
Tools
Unity SDK, Figma, Google Analytics, WebView, Amazon CloudFront CDN, MetaMask, Cron, Amazon Cognito, Microsoft Excel, Spreadsheets, Microsoft Visual Studio, Gradle, GitHub, Amazon CloudWatch, Git, AWS IAM, Amazon Simple Queue Service (SQS), Jira, Confluence, Amazon ElastiCache, Amazon Simple Notification Service (Amazon SNS), AWS Fargate, PlayFab, AWS CloudFormation, Google Sheets, Prisma, Autotask, Character User Interface (CUI), Remix IDE, Google Assistant, Unreal Development Kit (UDK), DataRobot, BigQuery, Postman, Dialogflow, Amazon SageMaker, Plaid, AWS AppSync, Puppet, Terraform, Zapier, Autodesk FBX SDK, Maya, Google Bard
Paradigms
Serverless Architecture, Mobile Development, Database Design, Back-end Architecture, DevOps, Scrum, REST, Cross-platform, Model View ViewModel (MVVM), Responsive Layout, Object-relational Mapping (ORM), Mobile App Design, Gamification, Microservices, Mobile Game Design, Agile, Agile Software Development, Unit Testing, Test-driven Development (TDD), Asynchronous Programming, Requirements Analysis, Desktop App Development, Responsive Web Design (RWD), MEAN Stack, ETL
Platforms
Amazon Web Services (AWS), Azure, iOS, Android, Firebase, AWS Lambda, Mobile, Blockchain, Ethereum, Amazon EC2, Windows, Google Cloud Platform (GCP), Azure Functions, Microsoft, Google AppSheet, AWS Elastic Beanstalk, Amazon Alexa, AWS IoT, Xbox, PlayStation, Bluetooth LE, Joomla, Docker, Oculus, WordPress, Kubernetes, Databricks, Vercel, Apache Kafka
Storage
MongoDB, NoSQL, Databases, MySQL, Amazon DynamoDB, Amazon S3 (AWS S3), JSON, PostgreSQL, Cloud Firestore, Redis Cache, Azure SQL Databases, Graph Databases, Database Architecture, Azure SQL, Azure Queue Storage, Redis, Azure Cloud Services, Unity Cloud Build, Firebase Realtime Database, Company Databases, Google Cloud, IIS SQL Server, Data Integration, Elasticsearch, Data Pipelines, SQL Anywhere
Industry Expertise
Project Management, Web Design
Other
Programming, Game Design, Computer Science, CI/CD Pipelines, Architecture, Gaming, APIs, User Interface (UI), Technical Design, Technical Architecture, CTO, Full-stack, Analytics, Front-end, Memory Leaks, Proof of Concept (POC), Serverless, Back-end, Security, Source Code Review, Code Review, Project Consultancy, AWS Cloud Architecture, AWS Certified Developer, 3D Games, Games, Web Security, Mobile Games, Unity3D Native Plugin Interface, Data Visualization, Interactive UI, Mobile Apps, 2D, User Authentication, Amazon RDS, Headless Software, Virtual DOM, Cryptocurrency Wallets, API Integration, Integration, Leadership, Team Leadership, Lambda Functions, Exports, MERN Stack, Technical Leadership, Mobile Game Development, Software Architecture, CSV, Calendars, Smart Homes, Smart Devices, Unreal Engine 5, Game Development, Gameplay Development, Adaptive Design, Mobile App Development, Apple Numbers, Web Development, Design, Discord, Google Play Store, Smart Contracts, Ethereum Smart Contracts, Firebase Cloud Functions, Front-end Development, Reverse Engineering, Software Design, Scalable Architecture, Back-end Development, 3D Rendering, 3D, .NET MAUI, Mobile UX, User Experience (UX), SDKs, Application Engineering, Authentication, Cryptography, Decentralized Applications, Mathematics, Casino Games, Cross-platform App Development, UI Components, Single Sign-on (SSO), Amazon Neptune, Web UI, Chatbots, Mobile Architecture, Data Architecture, Cloud Architecture, Amazon API Gateway, Android Game Development, Crypto, Algorithms, Data Structures, Trading, Azure Data Lake, Data Engineering, Unity Game Assets, In-app Purchases, Cloud, Minimum Viable Product (MVP), Early-stage Startups, Game AI, Slack App, Slackbot, Amazon Cognito User Pools, Full-stack Development, State Machines, Character Animation, Video Gaming, Distributed Systems, Blockchain & Cryptocurrency, ERC-1155, Abstract Syntax Trees (AST), Plugins, Extensions, 2D Games, Video Games, Game Programming, Memory Profiling, Optimization, Performance Optimization, Decentralized Finance (DeFi), Web3, Scalability, IT Infrastructure, SaaS, Virtual Reality (VR), Heatmaps, Bots, Discord Bots, Telegram Bots, Webhooks, MMORPGs, Networking, OAuth, Augmented Reality (AR), LiDAR, Web Scraping, Charts, Interactive Maps, Payment Gateways, Live Chat, Progressive Web Applications (PWA), Decision Trees, Lottie, Machine Learning, Artificial Intelligence (AI), Internet of Things (IoT), Responsive Web Apps, SSL Certificates, Multiplayer, Windows Desktop Software, Non-fungible Tokens (NFT), Data Analysis, Web 3.0, Tokenomics, WebSockets, Cryptocurrency, Axios, Card Payments, 3D Secure, 3D Secure 2.0, Near-field Communication (NFC), Secure Storage, Chrome Extensions, Natural Language Processing (NLP), Natural Language Understanding (NLU), GPT, Generative Pre-trained Transformers (GPT), Accessibility, Location Services, Audio, Online Payments, Web Platforms, SVG, OpenAI GPT-3 API, OpenAI GPT-4 API, Server Security, WebAuth, Secure Multi-party Computation, Data Analytics, 360° Video, Photogrammetry, VR Interfaces, QA Testing, OpenAI, ChatGPT, Visual Effects (VFX), Character Rigging, Web UX, Redux Toolkit, Workflow Automation, WebAssembly, UDP, TCP/IP, Blueprints Visual Scripting, UI Blueprints, Solana, Text to Speech (TTS), Payment APIs, SAP, Video Streaming, Apollo, LangChain, 3D Animation
Education
Bachelor's Degree in Game Design
Mediadesign Hochschule - Berlin, Germany
Certifications
AWS Certified Developer Associate
AWS
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