Hire the best Firebase Developers in Rio de Janeiro, BR
Check out Firebase Developers in Rio de Janeiro, BR with the skills you need for your next job.
- $20 hourly
- 5.0/5
- (42 jobs)
With over 8 years of dedicated experience in Unity development and 6 years as a freelancer on Upwork, I specialize in creating high-performance, engaging software solutions. My portfolio includes intricate 3D simulations, immersive 2D games, and advanced VR applications, all built with a focus on optimization and user experience. I am proficient in C# programming, emphasizing clean, testable code. My experience encompasses leading development teams, managing complex projects, and consistently delivering results that exceed client expectations. I have a proven track record of enhancing gameplay mechanics, refining UI/UX elements, and optimizing GPU and CPU performance. Whether you need a full-stack game developer to bring your vision to life or a specialist in 3D simulation design, I am committed to providing top-tier service and innovative solutions. Let’s collaborate to create something extraordinary. Check out my Upwork profile here!
Firebase
MathematicsMonetizationGame CustomizationBug FixSimulation GamePrototypingPerformance OptimizationWebGLiOSAndroidC#UnityGame Development - $30 hourly
- 4.5/5
- (5 jobs)
- Experienced Flutter/Dart Developer: Proficient in developing mobile applications using Flutter and Dart. - Firebase Integration: Skilled in integrating Firebase services with Flutter applications, including push notifications and cloud functions. - Software Architecture: Strong background in clean architecture and test-driven development (TDD) practices. - Corporate Data Systems: Experience with large volume corporate data systems and technologies, including Laravel/PHP, Bootstrap, Java Web, JavaScript, jQuery, HTML, PL/SQL, C, C++, Perl, Natural, and ADABAS. - Data Analysis and Maintenance: High-performance data analysis and maintenance for reports and system corrections using databases such as MySQL, Oracle, and SQL Server. - Complex Systems Development: Expertise in creating, constructing, and maintaining complex systems tailored to various industries. - Industry Knowledge: Extensive knowledge and interaction with high-performance systems, serving clients in telecommunications, steel, and government sectors. - Python Proficiency: Academic training and experience with Python, including the development of neural network models. - Mathematics Expertise: Solid knowledge in mathematics, complemented by didactic experience. - Language Skills: Native Brazilian Portuguese speaker.
Firebase
Oracle DatabaseSmartphoneTabletTest-Driven DevelopmentDartSQLPythonPHPBootstrapClean ArchitectureMobile App DevelopmentFlutterUser AuthenticationMySQL - $35 hourly
- 5.0/5
- (4 jobs)
- 5 years of experience working as a Full Stack Developer building and maintaining web applications, working on every part of the tech stack (backend, frontend, blockchain) - Proficient in the web ecosystem (JS/TS, Node.js & React, Vue & Laravel, .Net & Angular) and database operation for Firebase and both SQL and NoSQL with ORMs(TypeORM, MikroORM, Knex, Mongoose) - Familiar with cloud services (GCP, AWS, Azure) - Hands on experience in developing products for various businesses(Real Estate, Healthcare, Ecommerce, Construction, Accounting) - Developed AI applications integrating LLMs (Pygmalion, GPT-3) and Text Classification models - Good problem-solving and self-motivated
Firebase
SnowflakeMongoDBGitNode.jsReactJavaScriptTypeScript - $40 hourly
- 0.0/5
- (0 jobs)
Hi! I’m João — a software engineer and problem solver from Brazil 🇧🇷 With over 5 years of experience in tech, I help businesses, developers, and teams fix bugs, configure systems, integrate APIs, deploy apps, or automate anything that’s taking too much time or causing blockers. I don’t just build things from scratch — I also jump in fast to unblock, optimize, and make things work. 🧩 I can help you with: Fixing bugs or broken scripts Connecting APIs (Stripe, Firebase, Google, etc.) Setting up Docker environments and CI/CD Deploying your app or backend to production Writing automation scripts or serverless functions Providing technical support with web apps, auth, or databases Explaining and solving technical problems fast ⚙️ Tools I work with daily: Node.js, TypeScript, React, Next.js Firebase, Docker, MongoDB, PostgreSQL Stripe, JWT Auth, REST APIs Google Cloud, GitHub Actions, CI/CD Linux servers, Firebase Hosting, Render, Vercel I’ve worked with global brands like Jeep, RAM, Fiat, Peugeot, and Hospital Sírio-Libanês — but I’m also happy to jump into small tasks that just need the right pair of hands (and brain 🧠). Whether it’s a technical headache or something you don’t have time to deal with — I’m here to help and I work fast. Let’s get it done 🚀
Firebase
System ConfigurationGoogle Cloud PlatformSoftware DebuggingCI/CDLinux System AdministrationMongoDBNext.jsReactNode.jsStripeDockerTechnical SupportScript InstallationAPI Integration - $40 hourly
- 0.0/5
- (0 jobs)
I'm a mobile-focused software engineer with 7+ years of experience, specializing in building high-quality Android applications with Kotlin and Jetpack Compose. I’ve worked at scale on products like Quizlet, helping deliver fast, responsive, and reliable mobile experiences used by millions. While Android is my core strength, I also work across the stack—developing backend services with Python and Django to support mobile features with clean, efficient APIs. I understand the full product lifecycle and collaborate well with designers, product managers, and other engineers to bring features from idea to launch. I care about clean code, thoughtful architecture, and delivering work that’s both user-friendly and maintainable. Let’s build something great together.
Firebase
PythonDartJavaKotlinAgile Software DevelopmentMobile App DevelopmentDjangoFlaskSpring BootFlutterFlowFlutterAndroid StudioAndroidApp Development - $30 hourly
- 5.0/5
- (3 jobs)
Services ✅ 3D and 2D Games ✅ Android, Desktop, and Browser Games ✅ Prototype, Complete/Full Game, and Vertical Slice ✅ Profiling and Optimizing Load Time, Build Size, RAM, CPU, and GPU usage ✅ Debugging and Fixing Bugs ✅ Publishing Games (Steam and Google Play) ✅ Add Features to Existing Games ✅ Back-end and Front-end Web Solutions Expect professionalism from me 💼 Respect you and your time 💼 Effective, honest, and open communication 💼 Commitment to deadlines 💼 Attention to details 💼 Effort to help you the best way I can 💼 My full knowledge and experience in service of your goals Background 💻 +10 commercial games published 💻 +12 years of professional software development experience 💻 +3 years developing games with Unity 💻 Worked in big companies (with +30 dev teams) 💻 Worked in small teams 💻 Published my own games Tools and resources I'll use to develop the game you need ⚙ Unity 3D - For 3D and 2D games (PC, Mobile, and Browser/WebGL) ⚙ HTML, Javascript, and CSS - For lightweight browser games ⚙ Node.js, Ruby on Rails, Python, Firebase - For backend servers ⚙ Steam Leaderboards, Achievements, Stats, Cloud Save ⚙ Huge library of music, sound effects (SFX), visual effects (VFX), 3D, and 2D paid assets available to make prototypes and simple games Game genres I've already worked with 🕹 Arcade | Platformer | Shoot'em Up | Top-down | Shooter 🕹 Casual | Puzzle | Tower Defense | Runner 🕹 Educational | Typing 🕹 (the next genre you need) I also have the knowledge to work effectively in an engineering team 📚 Agile Methodology | Scrum | Sprint | Planning | Continuous Integration | Continuous Deployment 📚 Automated Testing | Unit Tests | Integration Tests | TDD | BDD | NUnit 📚 Git | Github | Feature Branch | Rebase | Squash 📚 Clean, modular, maintainable, and testable code/solutions 📚 OOP - Object Oriented Programming | Polymorphism | Design Patterns | SOLID | GRASP 📚 ECS - Entity Component System | Scriptable Object Architecture | Event-Driven Architecture 📚 MVC - Model View Controller | MVP - Model View Presenter | MVVM - Model View ViewModel 📚 DOTween | InControl | Zenject | UnityAtoms | Odin Inspector | VFX | Particles | Modern UI | Localization | Corgi Engine | TopDown Engine | Cinemachine Currently, I'm NOT working with ✖ AR | VR | Consoles (Because I don't have the equipment to test it) ✖ NFT | Crypto | Blockchain ⚠ I love to learn new things, so if the project touches on something I don't know, let's talk! I'm sure I can figure it out. Outside work I... ❤ Make my own tea herb mixes ❤ Love hiking ❤ Love karaoke ❤ Love programming ❤ Love making and playing games ❤ Travel quite a bit (Peru, Italy, Spain, Netherlands, Argentina, and within Brazil as well) 💀 Don't watch soccer (although I'm Brazilian) In summary... ⭐ I am a passionate, professional, and flexible game developer with a solid career. 🗨 Let's chat! I can't wait to know about the projects you have.
Firebase
LuaNode.jsRuby on RailsJavaScriptSteamWebGLMobile GamePC GameGame PrototypeGameC#Mobile Game DevelopmentGame DevelopmentUnity - $25 hourly
- 0.0/5
- (1 job)
Hi, I started my IT career when I was 16 years old, at the infrastructure side of things, taking care of servers and networks, in some companies, but then when I was about 20 years old, I migrated to the development field. So, I've worked with JAVA, from JAVA 1 to JAVA 6. On this path, I've worked on small and "big" companies, on the smaller ones, sometimes I had to be a fullstack, taking care of everything from the backend, databases, and the frontend. The larger one was DBA, where I've worked with JAVA + COBOL, using CICS to communicate with the mainframe, this time I was working with the maintenance of the FGTS (Retirement federal program) on CEF (Brazilian Federal Bank). Then, since 2015 I started to look more to the frontend side of things, as javascript started to grow, with ES6, NodeJS, and so on, I started to be more interested in the frontend, so I've learned NodeJS, React, and many other frontend related technologies, I've created a company for me, to work as a PJ / Freelancer and I've been working mainly with frontend since then. I have mainly used Linux since the 2000s, mostly using Debian and Ubuntu or inside a docker / WLS2(since last year) I’ve entered the master’s program in Artificial intelligence at UFRJ at the beginning of the covid pandemic, although I had grade A on all subjects, I could not complete the thesis in time to get the masters title, due to, losing relatives to the virus and getting sick too, but was a great experience, learned many things from the AI field and taught programming with Python3 for bachelor students from math and physics degree. To wrap things up, I see myself as a good team player, being glad to teach and learn from other work colleagues and I always try to stay up to date with technologies and the work schedule. Now, I'm looking to expand my career. Other interests I have for the future are artificial intelligence and cybersecurity.
Firebase
MongoDBDebianGraphQLFigmaTypeScriptJavaScriptReactHTML5CSSCSS 3GitNext.jsNode.jsSass - $10 hourly
- 0.0/5
- (0 jobs)
Olá! Sou estudante de Ciência da Computação com foco em desenvolvimento de aplicativos mobile utilizando React Native. Também tenho experiência com design de interfaces modernas e funcionais usando Adobe XD, o que me permite criar soluções completas — do protótipo ao app final. Criação de apps Android/iOS com React Native Design de interfaces responsivas e intuitivas com Adobe XD Integração com APIs e Firebase Prototipagem e navegação entre telas (UX/UI) Publicação de apps com Expo
Firebase
Web & Mobile Design ConsultationPrototypingWireframeMobile UI DesignExpo.ioiOS DevelopmentMobile App DevelopmentREST APIJavaScriptUX & UI DesignAdobe XDReact NativeMobile App - $30 hourly
- 0.0/5
- (1 job)
I am an iOS developer and I am always looking for new challenges! Currently, my focus is more on developing native applications for the Apple device ecosystem. Additionally, I am interested in products that offer innovative solutions and opportunities for personal growth. Here is a list of some of my skills: Proficiency in using the Swift language. Experience in using frameworks such as UIKit and SwiftUI for interface development. Knowledge of architectural design patterns such as MVC, MVP, MVVM, VIP, and Coordinators. Ability to implement event tracking for metrics analysis to aid in product growth, using tools such as Firebase Analytics, Mixpanel, and Facebook Analytics. Experience with Restful APIs and GraphQL for backend service integration. Familiarity with publishing an application to the App Store. Experience with automated testing, both unit and instrumented, using tools such as Quick, Nimble, and XCTests. Use of CI/CD workflows such as Bitrise. Familiarity with dependency managers like Swift Package Manager (SPM), Carthage, and Cocoapods. Knowledge of version control via Git. Regarding my professional journey so far, I have been in the mobile development field for 5 years. I have had various experiences within the market.
Firebase
Unit TestingGoogle Analytics 4SwiftUIAnalyticsApp DevelopmentiOS DevelopmentObjective-CSwiftiOS Want to browse more freelancers?
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