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Robert Lehmann, Full-stack and Unity3D Game Developer in Berlin, Germany
Robert Lehmann

Full-stack and Unity3D Game Developer in Berlin, Germany

Member since September 13, 2022
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.
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Portfolio

  • Jam City
    C#, JavaScript, Unity, CI/CD Pipelines, Amazon Web Services (AWS), SaaS...

Experience

  • Programming 12 years
  • C# 10 years
  • Unity 10 years
  • Computer Science 10 years
  • JavaScript 7 years
  • Serverless Architecture 6 years
  • CI/CD Pipelines 6 years

Location

Berlin, Germany

Availability

Part-time

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

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.

Employment

  • Associate Director, Engineering

    2016 - 2022
    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.
    • Had a split system, where the client (mobile app) was doing transactions. Fetched the challenge data per HTTPS request and sent it to our backend for further validation, where we checked it with the 3D secure vendor data, and sent back a success/failure to the client.
    Technologies: C#, JavaScript, Unity, CI/CD Pipelines, Amazon Web Services (AWS), SaaS, Architecture, SQL, Photon, Gaming, Unity3D, Virtual Reality (VR), .NET Core, Azure, iOS, Android, HTML, CSS, Node.js, MongoDB, APIs, Swagger, User Interface (UI), Unity SDK, Technical Design, Technical Architecture, React, Figma, CTO, Full-stack, Firebase, TypeScript, Swift, Mobile Development, Objective-C, Analytics, Google Analytics, Heatmaps, NoSQL, Database Design, Databases, .NET, Front-end, Next.js, Bots, Discord Bots, Telegram Bots, Memory Leaks, Proof of Concept (POC), AWS Lambda, Webhook, WebGL, MMORPGs, Mirror Networking, Serverless, Back-end, OAuth 2, OAuth, Security, Source Code Review, Code Review, Project Consultancy, PHP, MySQL, AWS Cloud Architecture, Augmented Reality (AR), ARKit, LiDAR, Back-end Architecture, ASP.NET MVC, 3D Games, C++, Games, Amazon DynamoDB, Amazon S3 (AWS S3), Web Security, Web Scraping, Unity2D, Mobile Games, Unity3D Native Plugin Interface, JSON, Zapier, Python, DevOps, Data Visualization, Charts, Interactive Maps, Interactive UI, Remix IDE, Firebase Realtime Database, Mobile Apps, React Native, Scrum, Payment Gateways, Express.js, Sass, Live Chat, 2D, Mobile, WebView, Progressive Web Applications (PWA), User Authentication, REST, AWS RDS, AWS Elastic Beanstalk, Amazon CloudFront CDN, jQuery, Headless Software, Virtual DOM, Cryptocurrency Wallets, MetaMask, Blockchain, API Integration, Integration, Leadership, SQL Anywhere, SAP, C#.NET, Team Leadership, Lambda Functions, Exports, MERN Stack, Technical Leadership, Mobile Game Development, Software Architecture, REST APIs, Cron, CSV, Company Databases, Calendars, Smart Homes, Amazon Alexa, Google Assistant, Google Calendar API, Smart Devices, MUI (Material UI), Kotlin, Unreal Development Kit (UDK), Unreal Engine, Unreal Engine 4, Unreal Engine 5, Game Development, Gameplay Development, Decision Trees, Twilio API, Lottie, HTML5, GraphQL, AWS Amplify, Amazon Cognito, Flutter, NestJS, DataRobot, Snowflake, PostgreSQL, Machine Learning, Artificial Intelligence (AI), Cross-platform, Internet of Things (IoT), Responsive Web Apps, Adaptive Design, Web Design, SSL Certificates, Cloud Firestore, Angular, Ethereum, Google Cloud, BigQuery, Mobile App Development, Microsoft Excel, Spreadsheets, Apple Numbers, Multiplayer, Microsoft Visual Studio, Web Development, Design, WebRTC, Ruby on Rails (RoR), Discord, Desktop App Development, Windows Desktop Software, Android SDK, Java, Model View Viewmodel (MVVM), Gradle, Google Play Store, Non-fungible Tokens (NFT), Smart Contracts, Data Analysis, Web 3.0, GitHub, Firebase Cloud Functions, Front-end Development, ASP.NET, ASP.NET Core, Reverse Engineering, Software Design, Scalable Architecture, PixiJS, Back-end Development, 3D Rendering, 3D, Django, Groovy, Responsive Layout, Grails, Amazon EC2, Redis Cache, WebSockets, Amazon CloudWatch, AWS IoT, .NET MAUI, Blueprint, RPG, Mobile UX, Object-relational Mapping (ORM), iOS SDK, Mobile App Design, Git, Responsive Web Design (RWD), User Experience (UX), Cryptocurrency, Laravel, SDKs, Xbox, PlayStation, Windows, Tailwind CSS, Dart, Axios, OpenAPI, Redux, Postman, Application Engineering, Vue, Gamification, XML, Card Payments, 3D Secure, 3D Secure 2.0, Authentication, Near-field Communication (NFC), Bluetooth LE, Secure Storage, Joomla, IIS SQL Server, Visual Basic, Azure SQL Databases, Mathematics, C++/CX, Chrome Extensions, Casino Games, ECMAScript (ES6), Natural Language Processing (NLP), Natural Language Understanding (NLU), Dialogflow, Cross-platform App Development, UI Components, Jest, Single Sign-on (SSO), D3.js, Social APIs, Graph Databases, Amazon Neptune

Experience

  • Mahjong City Tours
    https://www.jamcity.com/game/mahjong-city-tours/

    A multimillion-dollar-grossing game on Google Play and the App Store. As the director of engineering, I led a capable team of several engineers and personally developed most of the client, back end, and related pipelines for the project.

  • Solitaire Showtime
    https://www.jamcity.com/game/solitaire-showtime/

    A multimillion-dollar-grossing game on Google Play and the App Store. As the director of engineering, I led a capable team of several engineers and personally developed most of the client, back end, and related pipelines for the project.

  • Equity Token
    https://equitytoken.finance/

    Equity is a decentralized finance project that provides passive income and storing value while being peer-to-peer (P2P) payment friendly.

    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/

    Vault is a service that lets users easily and securely deposit their tokens within a special smart contract. There is an option to add multi-user authentication, and withdrawals are free. Developers can securely utilize it to manage liquidity pools and move them to different pairs without releasing them from a secure endpoint.

Skills

  • Languages

    C#, JavaScript, HTML, CSS, TypeScript, Swift, Python, C#.NET, Kotlin, HTML5, Java, Groovy, RPG, XML, ECMAScript (ES6), SQL, Objective-C, PHP, C++, Sass, GraphQL, Snowflake, Dart, Visual Basic, C++/CX

  • Frameworks

    Unity, Unity3D, .NET Core, .NET, Next.js, ASP.NET MVC, Unity2D, React Native, Express.js, MUI (Material UI), Flutter, NestJS, Angular, Android SDK, ASP.NET, ASP.NET Core, PixiJS, iOS SDK, Photon, Swagger, OAuth 2, ARKit, Unreal Engine, Unreal Engine 4, Django, Grails, Blueprint, Laravel, Tailwind CSS, Redux, Jest, Ruby on Rails (RoR)

  • Libraries/APIs

    React, Node.js, WebGL, REST APIs, Google Calendar API, AWS Amplify, D3.js, Social APIs, jQuery, Twilio API, WebRTC, Web3.js, Binance API, OpenAPI, Vue

  • Tools

    Unity SDK, Google Analytics, WebView, Amazon CloudFront CDN, MetaMask, Cron, Amazon Cognito, Microsoft Excel, Spreadsheets, Microsoft Visual Studio, Gradle, GitHub, Amazon CloudWatch, Git, Remix IDE, Google Assistant, Unreal Development Kit (UDK), DataRobot, BigQuery, Postman, Dialogflow, Figma, Zapier

  • 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, Desktop App Development, Responsive Web Design (RWD)

  • Platforms

    Amazon Web Services (AWS), Azure, iOS, Android, Firebase, AWS Lambda, Mobile, Blockchain, Ethereum, Amazon EC2, Windows, AWS Elastic Beanstalk, Amazon Alexa, AWS IoT, Xbox, PlayStation, Bluetooth LE, Joomla

  • Storage

    MongoDB, NoSQL, Databases, MySQL, Amazon DynamoDB, Amazon S3 (AWS S3), JSON, PostgreSQL, Cloud Firestore, Redis Cache, Azure SQL Databases, Graph Databases, Firebase Realtime Database, Company Databases, Google Cloud, IIS SQL Server, SQL Anywhere

  • Industry Expertise

    Security, Web Design

  • Other

    Programming, Computer Science, CI/CD Pipelines, Architecture, Gaming, APIs, User Interface (UI), Technical Design, Technical Architecture, Full-stack, Analytics, Front-end, Memory Leaks, Proof of Concept (POC), Serverless, Back-end, Source Code Review, Code Review, Project Consultancy, AWS Cloud Architecture, AWS Certified Developer, 3D Games, Games, Web Security, Mobile Games, Unity3D Native Plugin Interface, Interactive UI, Mobile Apps, 2D, User Authentication, AWS 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, 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, Game Design, Scalability, IT Infrastructure, SaaS, Virtual Reality (VR), CTO, Heatmaps, Bots, Discord Bots, Telegram Bots, Webhook, MMORPGs, Mirror Networking, OAuth, Augmented Reality (AR), LiDAR, Web Scraping, Data Visualization, Charts, Interactive Maps, Payment Gateways, Live Chat, Progressive Web Applications (PWA), Unreal Engine 5, 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), Payment APIs, SAP

Education

  • Bachelor's Degree in Game Design
    2012 - 2015
    Mediadesign Hochschule - Berlin, Germany

Certifications

  • AWS Certified Developer Associate
    NOVEMBER 2018 - NOVEMBER 2021
    AWS

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