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Senior Full Stack Engineer with 8+ years building scalable apps across fintech, payments, logistics, e-commerce (POS) and SaaS — production solutions serving 5M+ users and 10K+ businesses. Currently Software Engineering Coordinator at ConnectPlug, leading ERP modernization, payment microservices, delivery platform migration and franchise management. Also Full Stack Developer at FleetPay (freelance), delivering backend and Flutter mobile features end-to-end. STACK • Backend: PHP, Laravel, Laravel Octane (RoadRunner), Node.js, TypeScript, REST APIs, Webhooks • Frontend: Vue 3, Nuxt.js, React, TypeScript, Tailwind • Mobile: Flutter, Dart (iOS/Android release) • Cloud: AWS (Lambda, ECS, DynamoDB, S3, CloudWatch), Docker, CI/CD (GitHub Actions, Vercel) • Databases: MySQL, PostgreSQL, DynamoDB, SQL Server • Testing: PHPUnit, Jest, Cypress, TDD, Clean Architecture, SOLID • AI: Cursor, Claude, MCP, Copilot — code generation, tests, E2E automation, AI code review KEY ACHIEVEMENTS • Led online payment microservice and provider-agnostic payment link platform (Laravel Octane, PostgreSQL) • Coordinated legacy delivery migration to high-performance SaaS (Octane + DynamoDB, Open Delivery), 24M orders/month • Full stack across Laravel microservices and Flutter apps (banking UI, OFX export, mobile release engineering) • End-to-end migration of payment processor handling millions of transactions/day • Modular payment integrations (iFood, Cielo, Google Pay, Apple Pay, Asaas) • Banking partner integrations: KYC, biometrics, signed webhooks • Optimized queries from seconds to microseconds; reduced 11GB+ Webpack builds • 3x faster delivery via AI-assisted development • Modernized legacy stacks to Vue 3/Nuxt/TypeScript and modular microservices PROFILE Engineering Coordinator · Tech Lead · Senior Software Engineer · Software Architect Distributed systems, microservices, performance, technical leadership, mentorship, CI/CD São Paulo, Brazil — Open to Remote, Hybrid and International Open to: Senior/Staff Engineer, Tech Lead, Engineering Manager, Software Architect, Freelance Languages: Portuguese (native), English (Professional Working) #PHP #Laravel #TypeScript #VueJS #NuxtJS #React #Flutter #AWS #Docker #DynamoDB #FullStack #TechLead #Fintech #Payments #SaaS #Microservices #AIAssistedDevelopment #SeniorEngineer #RemoteWork

Whether you need someone to build the whole thing solo or lead the team that does, I can do both. On some projects I'm the one writing every line. On others I'm the tech lead or fractional CTO setting the architecture and keeping the team shipping. Either way, the job gets done. What I bring is range: I see the process, the code, the infrastructure, and the actual business goal behind it, all at once. That's rare, and it's why clients hand me the whole problem instead of a slice of it. I build AI automations and system integrations that run in production, not demos that fall apart the second a real user touches them. Here's what I do: 🤖 AI that's actually wired into your business. OpenAI, Claude, and LLM workflows connected to the tools you already use (CRM, Slack, WhatsApp, Stripe, email) so data moves on its own and nobody's copy-pasting between tabs all day. ⚙️ Automations that kill the boring work. n8n, Make, and custom code that connect systems that were never built to talk to each other. 🌐 Web platforms from zero. Backend, APIs, webhooks, frontend, database. The whole thing. 🚀 Deployment and infrastructure included. Docker, VPS, CI/CD, self-hosted setups. Secure, scalable, and 100% yours. No vendor lock-in. 🧭 Leadership when you need it. Architecture decisions, code reviews, and keeping a team moving in the right direction without the drama. I think like a tech lead, not just a coder. I want to know how a system breaks before it goes live, so you're not the one finding out at 2am. A bit about me: I came into tech from years in design, marketing, and advertising. I once took a company from zero online presence to over 3M in direct sales in two years. That's why you'll see magazine layouts and ad campaigns in my portfolio too, and I kept them on purpose. It means I get the product and the customer, not only the code. I don't just build systems. I build the ones that move the number you actually care about. If you've got an AI or automation project and you want someone who can own it from idea to live, solo or leading your team, let's talk. Send me a message and tell me what's slowing you down.

💡Let's transform your SaaS idea into a revenue-generating MVP in 30 days, helping you find product-market fit 3x faster and secure your first paying customers. Let's make it happen! 🏆Achievements and Happy Customers! • Rescued an Agriculture SaaS business (Itricorp) by rebuilding their failing core platform into a better version just in time to secure their market position. ➡️ "I could say what I needed, and ByteNaNa turned it into code." - Jim Etro, CEO, Itri Corporation • Partnered with a garage startup to build their entire IoT SaaS platform, scaling Watchdog Home Monitor into a successful, market-ready business. ➡️ “The team is extremely responsive and easy to speak with.” - Trey Welstad, CEO, Snowbird • Led the successful launch of a B2C SaaS (GenoStories) on the App Store & Google Play by rescuing and stabilizing its failing legacy codebase. ➡️ "What impresses us most about Bytenana is their ability to deeply understand the emotional purpose behind our product." - Alba D Reboyras, Co-Founder, Genostories Inc • Engineered a mission-critical Industrial IoT SaaS for the mining sector, enabling predictive maintenance and significantly reducing costly operational downtime. ➡️ "They listen to the problem and deliver software that works at a fair cost." - James Trace, CEO, Multotec • Developed a custom content automation SaaS that saved us the full cost of a dedicated social media employee every month. ➡️ "Bytenana is the best place to work!" - Bytenana Team (It is true! People love working here.) 🧠Consultants first, developers second. We work side-by-side with founders, CTOs, and operations leads to solve real business problems — not just ship code. 🧐🧐🧐🧐 Hey, no need to believe us, check the verified reviews from our customers and also demo videos in the portfolio below. (I mean, our faces are there, can't make that up!) 😌😌😌😌 ------------------------------------------------------------------------ ⚙️Our Tool Box 🤖 AI TECHS LangChain | n8n | Make | OpenAI/GPT-4 and other models | Pinecone | Supabase | RAG | AI systems | Lovable.ai | Cursor.ai | Aider → Sales Pipeline and Follow-up Automation • Deep Personalization Cold Outreach System • Proposal Automation System • AI-Powered Content Creation for Social Media Lead Generation • SEO AI Content Producers • Recruiting and Candidate Screening Automation • AI Chatbot 🔍 Context Engineering → Deep requirement elicitation with AI-powered discovery sessions eliminate guesswork and ensure pixel-perfect delivery and fast prototyping. 🌐 Frontend & Visualization Mapbox GL | React | JavaScript | PowerBI | Tableau | Superset → Interactive maps • Real-time dashboards • Mobile-responsive UIs 🗄️ Backend & Databases PostGIS/PostgreSQL | GeoServer | Node.js | Express | GeoDjango | Java Spring | Next.js | N8N | Swagger → Spatial query optimization • Feature services • High-concurrency APIs • API Development • API Integration ☁️ Cloud Infrastructure AWS (Lambda, S3, RDS) | GCP | Docker | Kubernetes | Serverless | Azure | CloudFlare | → Scalable pipelines • Cost-optimized architecture • CI/CD deployment 💡💡Send us a message and let's schedule a call!💡💡

Hello, and welcome to my profile. I’m new to Upwork, but I’ve been working in the software industry for several years. Now I want to bring my real-world business experience into the freelance market—helping clients build reliable, scalable solutions that solve practical problems and deliver measurable results. I work as a Full-Stack Developer, delivering end-to-end solutions: planning, architecture, backend, frontend, integrations, deployment, and continuous improvements. My recent work includes building robust systems that integrate payment gateways, AI-assisted message management, multichannel communication (such as WhatsApp and Messenger), real-time analytics, and user engagement features. In parallel, I also have solid experience in the mobile ecosystem, including Flutter development, app publishing, and the full release cycle. I’ve worked on real-world mobile projects such as the Teleblock app, and I also bring experience from the mobile telecommunications sector, which strengthened my understanding of reliability, scale, and user-facing operations. Core Skills & Tech Stack: • Frontend: React, Next.js • Backend: Node.js, Java (Spring Boot) • Mobile: Flutter (development + publishing/release process) • Automation: Python • Databases: SQL (relational) and NoSQL (MongoDB and similar) • DevOps: Docker, CI/CD pipelines, VPS deployments, AWS S3 Professional Experience (Highlights) • Built and maintained products and systems end-to-end, including messaging platforms, automations, payment integrations, and analytics dashboards. • Delivered mobile applications with hands-on experience across development, testing, and publishing to app stores (including Teleblock). • Background in the telecommunications/mobile phone sector, supporting operational demands and customer-focused systems. • Worked as a TOTVS RM Analyst/Developer, creating solutions to streamline academic workflows and reduce manual processes. • Served as an IT Analyst in the public health sector, supporting an Electronic Health Record (EHR) environment and ensuring operational continuity. • Automated data workflows and business processes to improve reliability, speed, and scalability. How I work: I value clear communication, clean architecture, and dependable delivery. Whether you need someone to build a solution from scratch, improve an existing system, ship a mobile app, or integrate critical services (payments, messaging APIs, analytics, automation), I can help. Send me a message with your project goals—I’ll respond with a practical plan, suggested architecture, and next steps.

With AI software have became art, and as an experienced Software Engineer with background in prototyping, developing, scaling, architecting, and maintaining large-scale web applications in highly critical environments, serving thousands of users daily, I can help you leverage your product technical level Technologies: - Typescript / Javascript / Python / Java / Ruby - Angular / React / Ionic / Flutter - Microservice / Clean Architecture / SOLID / Design Patterns - AWS / GCP - Docker / Serverless - MongoDB / DynamoDB / Firestore / Postgres / MySQL - Tests (unitary / integration) - CI/CD (Github Actions / Jenkins) Experienced problem solver with strong background in Software Engineering and Agile environments, I do my best to deliver top-notch solutions within time and budget, despite technicalities and tech preferences. If I don't know previously a way to solve your problem, I will find not only a way, but the best way possible with the resources available. My purpose is to let a positive impact into the world, and I do that daily by delivering software solutions and being a good father, son and team member. I believe that everything cooperates for the great. Let's talk and see how can I help your business succeed.

I'm a Senior DevOps Engineer with 7+ years of experience (since 2017) empowering startups and enterprises to design, automate, and optimize cloud infrastructure. My expertise covers AWS, Azure, Kubernetes, Terraform, GitLab CI/CD, and Python scripting, delivering secure, scalable, and efficient solutions. 🔧 What I can help you with: - Infrastructure as Code: Terraform, CloudFormation - Cloud Platforms: AWS (EC2, Lambda, Control Tower), Azure (Resource Manager, AKS) - CI/CD Pipelines: GitLab CI/CD, GitHub Actions, Azure DevOps, Jenkins - Containerization & Orchestration: Kubernetes, Helm, Docker - Automation & Scripting: Python, Ansible, Shell - Monitoring & Observability: Prometheus, Grafana, CloudWatch - Cloud Security & Compliance: IAM, encryption, policies, security audits - Multi-account and Multi-cloud Strategies 🏆 Why work with me: - Top Rated Freelancer on Upwork - 100% Job Success Score - Solid background with companies like Thoughtworks, Kubeshop, CI&T - Proven ability to reduce cloud costs, optimize deployments, and increase infrastructure reliability. Let’s connect to discuss how I can help you scale, automate, and secure your infrastructure with the latest cloud-native technologies.