Hire the Best Firebase Developers
in Brazil

- Rust, Tauri, Desktop App - Langchain, Langgraph, Langsmith, OpenAI, Pinecone, Claude, AI Agent orchestration, Chatbot, Multi agents, RAG pipeline - Stripe, Outseta - Next.js, PayloadCMS, Vue3, Python, Node.js, Astryx, Shadcn, TailwindCSS - Supabase, Firebase

Currently developing bespoke Web applications for a diverse set of clients. Since 2016, I have worked as a Full Stack engineer, contributing to various projects, Software as a Service (SaaS) products, and the development and integration of commercial APIs. Holding an MSc degree in Genetics, my professional trajectory began in biology, later transitioning to software development during the course of my PhD thesis research. Since this pivot, I have worked independently and collaboratively to deliver custom web-based solutions, for stakeholders encompassing large corporations and smaller entities based in several countries around the world. These projects have ranged from singular Progressive Web Applications (PWA) with offline-first capabilities to extensive distributed systems capable of processing thousands of daily payments and orders. I learned english, coding and most of my skills by myself. It strikes me as an unique challenge, to create transparent and compelling experiences through technology, and that keeps me motivated to learn more and build great things.

I’m a backend and full-stack engineer. I spend most of my time on slow systems, broken search, and things that shouldn’t require a human sitting there clicking through spreadsheets. Some numbers from a platform with 1.4M+ users: • Migrated 100+ production queries to a new data warehouse. Average execution went from 190s to 2s. • Built a search relevancy pipeline (Elasticsearch + cross-encoder reranking). Went from 80% to 96% relevancy, measured through iterative benchmarks. • Automated a report that took someone 2 hours of pulling from multiple spreadsheets. Runs in 5 minutes now. Day to day I work across: • Backend and APIs — Django, FastAPI, Node.js/Express, REST, WebSockets • Search — Elasticsearch, semantic search, reranking pipelines • Data — BigQuery, PostgreSQL, Redis, Airbyte, ETL, query tuning • Automation — Python/Selenium, Puppeteer, workflow scripts • Infra — Docker, CI/CD, Heroku, Cloudflare • Some frontend when needed — React, TypeScript I scope upfront and flag trade-offs before they become problems. I reply fast (under 30 minutes during work hours) and I don’t disappear mid-project. Top Rated on Upwork.

My portfolio: bernardonp.dev I am a software developer with over 6 years of experience, specializing in mobile app development for iOS and Android, focusing on Flutter and Node. I have contributed to the creation of several successful apps, including projects with hundreds of thousands of active users. I have solid experience in developing robust, clean, and scalable systems, always prioritizing the delivery of high-performance products with excellent user experiences. In addition to app development, I also have experience in game development using Unity (AR and VR), combining my passion for games with the creation of complex and creative systems. Experience with CI|CD, AWS, DevOps, Firebase, MongoDB, SQL, Stripe, Native... I study AI and I'm getting deeper and deeper into this area! I am flexible with my work schedule and fully committed to meeting deadlines, always focused on delivering solutions that add value to the business and provide users with a fluid and intuitive experience. Let's bring your idea to life!

I’m a Unity Game Developer with 100+ Unity-based games, mobile games, video games, AR/VR applications, and interactive experiences built from scratch for startups, small businesses, and enterprise clients. As a Unity developer, I’ve worked on Game Development, Mobile Game Development, Video Game Software, AR & VR Development, Augmented Reality, Virtual Reality, Photon Unity Networking, and cross-platform projects for iOS, Android, PC, Windows, Steam, and VR devices. 𝙃𝙤𝙬 𝙄 𝘾𝙖𝙣 𝙃𝙚𝙡𝙥 𝙔𝙤𝙪: 1️⃣ Unity Game Development: I build complete Unity games and mobile games with smooth gameplay mechanics, clean scenes, engaging UI, strong performance, and scalable project structure. 2️⃣ Mobile Game Development: I develop mobile games and interactive apps for iOS and Android using Unity and C#, making sure the game runs smoothly across smartphones, tablets, and mobile platforms. 3️⃣ AR/VR Development: I create AR applications, Augmented Reality experiences, Virtual Reality projects, and AR & VR interactive solutions for training, education, entertainment, simulation, and business use. 4️⃣ Online Multiplayer & Photon Unity Networking: I can integrate multiplayer features, real-time gameplay, user systems, matchmaking, and online game functionality using Photon Unity Networking and Unity multiplayer tools. 5️⃣ Bug Fixing, Optimization & Game Improvement: I fix bugs, clean up Unity projects, improve performance, reduce load times, optimize gameplay, and make existing games feel smoother, faster, and more polished. 6️⃣ Game Prototypes & Full Builds: I help turn ideas into playable game prototypes, MVPs, demos, and complete video games ready for testing, pitching, or launch. 𝙆𝙚𝙮 𝘼𝙘𝙝𝙞𝙚𝙫𝙚𝙢𝙚𝙣𝙩𝙨: 🔹 Built 100+ Unity games, mobile games, AR/VR apps, and interactive applications. 🔹 Delivered a Unity mobile game with 50,000+ downloads. 🔹 Improved Unity game performance by up to 40% through debugging and optimization. 🔹 Integrated AR/VR features and Photon Unity Networking multiplayer systems in 20+ projects. 🔹 Built game prototypes that helped startups present their ideas, test gameplay, and attract investor interest. 🔹 Worked with designers, developers, and business teams to deliver polished, scalable Unity projects on time. 𝙀𝙭𝙥𝙚𝙧𝙩𝙞𝙨𝙚: 🔹 Game Engines: Unity, Unity3D, Game Engine, Video Game Software 🔹 Game Development: Game Development, Mobile Game Development, Video Game, Game, Mobile Game 🔹 AR/VR: AR & VR, AR/VR Development, Augmented Reality, Virtual Reality, AR Applications, AR/VR Devices & Platforms 🔹 Multiplayer: Photon Unity Networking, online multiplayer, real-time gameplay systems 🔹 Platforms: iOS, Android, PC, Microsoft Windows, Steam, VR devices, smartphones, tablets 🔹 Tools & Languages: C#, Unity Editor, Visual Studio, Git, debugging tools, asset management 🔹 Services: Bug fixing, performance optimization, game prototypes, gameplay systems, UI, animations, project cleanup, and full Unity development The best way to start is with a free call and a quick review of your Unity game, mobile game, or AR/VR project needs. Send me a message, and I’ll help you figure out the best next step.

Building scalable backend systems, cloud infrastructure, AI integrations, and full-stack applications with AWS, FastAPI, Django, and Flutter. Over the past few years, I’ve worked across full-stack development, cloud infrastructure, automation, and AI integrations — helping clients ship faster while keeping systems reliable, maintainable, and production-ready. My work goes far beyond “building apps.” I help companies design and scale real systems: • AI-powered platforms and internal tools • Automation pipelines and workflow orchestration • High-performance backend APIs • Real-time systems and event-driven architectures • Mobile and web applications • Cloud infrastructure on AWS • Scalable async processing and integrations I’m especially strong at connecting product thinking with engineering execution — turning ambiguous business ideas into clean technical solutions that can actually scale. Tech stack includes: • Python (FastAPI, Django, DRF) • AWS (ECS, Lambda, SQS, DynamoDB, RDS, EventBridge, CloudWatch) • Flutter (iOS, Android, Web) • PostgreSQL & DynamoDB • OpenAI / Claude / AI-assisted workflows • Docker & CI/CD pipelines • REST APIs & third-party integrations Recent work includes: • AI-powered database querying systems (natural language → SQL / DynamoDB) • Horizontally scalable trading infrastructure on AWS • Real-time financial alert processing systems • Mobile apps with complex business workflows • Internal AI tools and automation platforms I move fast, communicate clearly, and care deeply about building systems that are robust in production — not just impressive demos.