Experienced full stack developer building complete web applications and mobile apps with modern technologies. Expertise in React, Node.js, Python, and Flutter for end-to-end development solutions. Full Stack Development Expertise Specialized in creating scalable web applications and mobile apps from concept to deployment. Proven track record delivering complete solutions across frontend, backend, database, and mobile platforms for startups and established businesses. Technical Skills Frontend Development: React.js with modern hooks, context, and state management TypeScript and JavaScript ES6+ Responsive design with CSS, Tailwind CSS, and Material-UI Single Page Applications (SPAs) and Progressive Web Apps Backend Development: Node.js with Express.js for REST APIs and microservices Python with Flask and Django for web applications RESTful API design and GraphQL implementation Database design with PostgreSQL, MySQL, and MongoDB Mobile Development: Flutter for cross-platform iOS and Android apps React Native for JavaScript-based mobile solutions App Store and Google Play Store deployment Mobile API integration and offline functionality Cloud & DevOps: AWS services: EC2, S3, RDS, Lambda, CloudFront Docker containerization and deployment CI/CD pipelines with GitHub Actions Database management and optimization Data & Visualization: Interactive charts with Chart.js, D3.js, and Flutter charting libraries Real-time dashboards and analytics platforms Data processing and API development Business intelligence and reporting systems Recent Project Highlights Full Stack Web Applications: React frontends with Node.js/Express backends User authentication and role-based access control Real-time data dashboards with interactive charts E-commerce platforms with payment integration Admin panels and content management systems Mobile Applications: Cross-platform Flutter apps with API integration Real-time monitoring and notification systems Offline-capable apps with local data storage Business productivity and data visualization apps Backend Systems: Scalable REST APIs serving web and mobile clients Database design and optimization for high-performance applications Third-party service integrations and webhook handling Automated deployment and monitoring systems Technology Stack Frontend: React, TypeScript, JavaScript, HTML5, CSS3, Tailwind CSS Backend: Node.js, Express.js, Python, Flask, Django Mobile: Flutter, React Native, Dart Databases: PostgreSQL, MySQL, MongoDB, SQLite Cloud: AWS (EC2, S3, RDS, Lambda), Firebase, Heroku Tools: Git, Docker, Webpack, npm/yarn, REST APIs, GraphQL Proven Results Delivered web applications and mobile apps with clean, maintainable code architecture. Apps published on major app stores with positive user feedback. Specialties: API-driven applications, real-time data systems, e-commerce platforms, business dashboards, and complete end-to-end development.

I'm Omer Odabas; a software engineer with 8+ years of experience building production-grade web, mobile, and desktop applications for startups and enterprise clients. My core strength is Angular. I build scalable, maintainable frontends with a focus on architecture, performance, and clean code that teams can actually grow on. When a project calls for it, I work in React too. What I build: - Enterprise web apps (Angular, React, TypeScript) - Cross-platform mobile apps (Ionic, Capacitor - iOS & Android) - Desktop apps (Tauri) - Full-stack systems (Node.js, PHP, Python + REST/GraphQL APIs) - AI-integrated features - connecting LLM APIs, building agentic workflows, and adding intelligent layers to existing products (LangChain, Vercel AI SDK, OpenAI) Where I go beyond just shipping code: Most developers write features. I think in systems. Whether it's designing a scalable architecture from scratch, untangling a messy codebase, or advising on the right tech stack for your constraints. I bring the engineering judgment that saves you from expensive mistakes down the road. I've built everything from hotel & restaurant management systems to startup platforms, always with an eye on long-term maintainability and performance under load. If you need someone who can own a project end-to-end from database schema to pixel-perfect UI and communicate clearly along the way, let's talk. 📅 Available for long-term contracts and project-based work. Feel free to reach out.

I have 20 plus years of IT experience with a focus on software development. I have worked on many different types of software projects, including but not limited to, website development, stand-alone desktop, mobile, and RestFUL APIs. I'm also an experienced system administrator in both Linux and Microsoft platforms. I graduated from Tulane University’s A.B Freeman School of Business in New Orleans, Louisiana USA in 2000. I earned a B.S.degree in Finance, but also took many computer science classes that helped build my foundation as a software developer. I believe my business degree helped nurture many of the analytical and organizational skills that have helped me become a successful software developer. It also emphasized good communication skills, which I think is critical in any type of business process. I am a full stack developer with a large skill set of both front and back-end technologies. I have been part of many successful software projects. For a look at my work please check out my portfolio. I’m a full-time freelancer who operates on U.S business hours. I am also willing to accommodate non-US hours on a case by case basis. I greatly appreciate you taking the time to review my credentials and experience. Please contact me for any comments or questions.

You've built something that works. Now you need a team that can take it further — without you becoming a full-time engineering manager. That's exactly what Prizmstack does. We're not a dev shop. We're an embedded AI product team — strategy, engineering, design, QA, and product management under one roof — and we've been the full technical team behind Magai for over three years while they grew from zero to $1M+ ARR. Bootstrapped. No VC. Just consistent shipping. If you just raised a round, hit product-market fit, or are scaling a SaaS product that needs serious AI implementation, custom dashboards, or a team that treats your product like it's their own — we should talk. What I bring as your Fractional CTO: As the CEO of Prizmstack with 7+ years building AI-native products, I become your single technical decision-maker. I own the architecture, set the roadmap, run the sprints, and make the calls you shouldn't have to make. You get one throat to grab — mine — backed by a full delivery team. What my team brings: AI integration & implementation (OpenAI, Anthropic/Claude, RAG pipelines, LLM orchestration) Full-stack product development (Next.js, React, React Native, Node.js, Supabase, PostgreSQL) Custom SaaS dashboards & internal tools UX/UI design, QA, DevOps, and cloud infrastructure Ongoing retainer relationships — we don't ship and disappear Who we work best with: ✅ Bootstrapped SaaS founders at $300K–$3M ARR who can't yet justify hiring in-house engineers ✅ Funded startups (pre-seed to Series A) who need a team on day one, not in 6 months ✅ Businesses paying $10–20K/month who want a dedicated team — not a freelancer lottery What makes us different: Most agencies optimize for the invoice. We optimize for the relationship. Our longest client has been with us for 3+ years. We've shipped 60+ web and mobile products, and our model is simple: you run your company, we run your product. The Magai story in one line: A solo non-technical founder. A product that needed to move fast. Three years later, $1M+ ARR — and we're still shipping together. ⏩ Send me a message describing where your product is today and what's blocking your next milestone. I'll tell you in 15 minutes whether we're the right fit — and if we're not, I'll point you in the right direction.

𝐄𝐱𝐩𝐞𝐫𝐭-𝐕𝐞𝐭𝐭𝐞𝐝 (top 1% on Upwork) and 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐏𝐥𝐮𝐬, with $𝟒𝟎𝟎𝐊+ earned across 𝟏𝟐𝟓+ projects. I'm a founder and full-stack engineer who acts as your technical partner, architecting AI and blockchain systems that work in production, not just in a demo. Most clients come to me when the build actually matters: when it has to be secure, has to scale, and has to handle real data or real money without breaking. I architect and build custom systems end to end, and I can bring in a vetted team when a project needs more hands. Think of me as a fractional CTO and a builder in one: senior judgment on the strategy, real hands on the code. A lot of AI talent stops at a clever prompt and a slick demo. I come at it as a systems engineer. I have architected a Layer 1 blockchain hardened with post-quantum cryptography, a decentralized exchange and validator platform, an on-chain tokenization system for commercial real estate, and production AI agents that run real sales and operations workflows. I work natively in fintech and regulated systems, so I'm as fluent in tokenomics, compliance, and data-heavy infrastructure as I am in the code itself. If your AI or your protocol has to be correct, not just impressive, that is the gap I fill. 𝐖𝐇𝐀𝐓 𝐈 𝐁𝐔𝐈𝐋𝐃 • AI agents and automation: multi-agent systems, LLM integration, RAG, and automation wired into your real tools and data • Custom full-stack software: React / Next.js, Node.js, Go, Rust, and databases, built and shipped end to end • Smart contracts and protocols (EVM and Solana): audited, gas-optimized, production-ready • DeFi and tokenization: staking, swaps, liquidity, governance, and real-world-asset / on-chain systems • AI for fintech and on-chain: the rare overlap of AI, blockchain, and financial systems, done by one person who understands all three • Technical strategy: architecture, security review, tokenomics, and the roadmap to get there 𝐖𝐇𝐘 𝐂𝐋𝐈𝐄𝐍𝐓𝐒 𝐇𝐈𝐑𝐄 𝐌𝐄 • 𝐄𝐱𝐩𝐞𝐫𝐭-𝐕𝐞𝐭𝐭𝐞𝐝 and 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐏𝐥𝐮𝐬: roughly the top 1% of Upwork talent, with $𝟒𝟎𝟎𝐊+ earned and 𝟏𝟐𝟓+ projects delivered • A founder's perspective: senior judgment on strategy, with real hands on the code • Security and correctness first: audits, hardening, and systems trusted to move real value • Senior, direct communication and predictable, on-time delivery If you are building an AI product or a custom platform, automating real operations, launching a protocol, or tokenizing real-world assets, and you want a technical partner who will get it right the first time, let's talk.

Hi! 👋 Ever had a killer idea for an APP or WEB PLATFORM, but got stuck with development taking forever and costing a fortune? Finding a solid developer who can actually build the thing without breaking the bank can be a real headache. That's where I come in. I spent 4 years shipping hyper-casual games with Unity — tight deadlines, complex systems, and zero room for fluff. That foundation in building fast, scalable software now powers my work in web and mobile development. I know how to go from idea to live product in weeks, not months. 🛠️ Here's what I do now: 🚀 Web App Development — React, Next.js, Node.js, PostgreSQL. SaaS platforms, dashboards, marketplaces — built fast, built right. 🚀 Mobile App Development — Flutter for iOS/Android. Cross-platform apps that feel native (social apps, fitness tracking, business tools). 🚀 Full-Stack Systems — AI integrations, automation workflows, third-party APIs, admin panels. 🚀 MVP Development — Non-technical founder? I architect, build, and deploy your first version. No technical headaches on your end. 🚀 App Store Publishing — Full submission and approval handling for both App Store and Google Play. 🚀 Existing Code Maintenance — Inherited a messy codebase? I reverse engineer, refactor, and get it production-ready. I ship clean, working software that gets you to market fast. No hand-holding required. Let's chat and turn your idea into reality! 💪

Full Stack Engineer with 8+ years of experience building scalable web and mobile applications in fast-paced startup environments. Specialized in React, React Native, and cloud deployment, with strong expertise in API integrations. Skilled at independently architecting and delivering features from design to release, while collaborating closely with QA and product teams in Agile settings to ship reliable, user-centered software. Expert at working independently, organized and confident in meeting deadlines. - React - React Native - Javascript / Typescript - HTML / CSS - Expo - Next.js - Tailwind - Python - Django - Github copilot - Claude / ChatGpt

I am a Senior Embedded & IoT Engineer with a strong hardware-first mindset, specializing in the design, development, and optimization of embedded systems from schematic to production. My expertise lies in turning complex hardware concepts into reliable, manufacturable products. Beyond embedded firmware, I support product ecosystems with Qt, Python, and Swift, enabling desktop tools, automation, testing utilities, and companion mobile applications when needed. I have extensive hands-on experience with PCB design and bring up, including schematic capture, multilayer PCB layout, signal integrity, power management, component selection, and design for manufacturing (DFM/DFA). I work confidently with microcontrollers and SoCs (ARM, ESP32, STM32, Nordic, Microchip) and handle full board bring up, debugging, and validation using professional lab tools. On the firmware side, I develop high-performance embedded software in C and C++, integrating RTOS, device drivers, communication protocols (SPI, I2C, UART, CAN, USB, Ethernet), and wireless technologies (BLE, Wi-Fi, LoRa, LTE). I also integrate AI/ML at the edge, optimizing models for constrained hardware. - Embedded hardware & firmware development: MCU-based systems, C/C++, RTOS, embedded Linux - PCB design: digital, analog, and power schematics; 1–18 layer layout; SI/PI (Altium, KiCad) - Manufacturing readiness: BOM, Gerbers, Pick-and-Place, DFM/DFA - IoT systems: device provisioning, telemetry, OTA updates, MQTT, REST APIs - Edge AI & signal processing: sensor fusion, DSP pipelines, on-device inference - Power electronics: AC/DC, DC/DC converters, MPPT, battery management - Wireless & interfaces: BLE, Wi-Fi, cellular, GPS, LoRa, MIPI CSI-2/DSI - Applications & tools: Qt/C++, Python, Android, iOS (Swift) Let’s work together to bring your embedded idea to life. From solid hardware design to reliable firmware and scalable IoT systems, I help take products from concept to realworld deployment. I appreciate you taking a moment to read this.

Pay cheap, pay twice—or hire me and get it done right the first time. I’m a senior software engineer who excels at fixing the mess others leave behind. If your project’s in trouble, I’ll turn it around fast and right. I can help you with: ✓ Taking over, auditing, and improving your existing mobile app ✓ Creating your mobile app from scratch ✓ Joining your mobile team My strengths ✓+20 years of experience as a software engineer and architect ✓ +10 years of experience creating mobile apps ✓ Worked with companies of all sizes: startups, SMEs, and large corporations ✓ Business oriented. I’m an entrepreneur myself. ✓ Industry best practices (Test-Driven Development (TDD), Clean Architecture, Clean Code, SOLID principles, and CI/CD) ✓ Latest Android technologies (Kotlin, coroutines, MVVM, Jetpack Compose, JUnit, MockK) ✓ Experience with Flutter, Kotlin Multiplatform and many backend technologies. ✓ On the shoulders of AI. I harness AI-powered tools like GitHub Copilot, Cursor, and Windsurf to boost efficiency in development, automation, and problem-solving ✓ Willing to push the boundaries and assuming new challenges FAQ 1. Why should I trust you over other freelancers? I’ve been hired repeatedly to fix projects that were left in chaos by other developers. I bring proven experience in delivering quality code and rescuing troubled projects. 2. How do you handle poor-quality code from previous developers? I specialize in assessing and fixing messy code. Instead of starting from scratch, I analyze what can be salvaged and ensure the project gets back on track efficiently. 3. What if I’m not technical? Can you help me understand progress? Absolutely. I provide clear communication, regular demos, and updates to ensure you’re always in the loop, regardless of your technical background. 4. What happens if the project scope is unclear or changes? I’m used to working with evolving requirements, especially in fast-paced startups. I help refine the scope and keep the project aligned with your goals, even as they change. 5. Do you subcontract your work? No. When you hire me, you work directly with me. I don’t outsource or subcontract any part of your project. 6. Can you deliver high-quality work even if it’s more expensive? A higher rate reflects speed, expertise, and the ability to avoid common pitfalls. By leveraging AI tools and deep industry knowledge, I reduce technical debt, ensuring your project is not just built fast but built right—saving you time, money, and frustration down the road. 7. How will I know the project is progressing as planned? I provide regular progress updates and deliverables, ensuring transparency. You’ll always know what’s happening and why, with no surprises. 8. Why is it better to hire you than a cheaper developer? Cheaper developers often deliver poor results, costing you more in the long run. I fix those mistakes, delivering work right the first time to save you from expensive rebuilds. Technologies During my professional career I employed a number of technologies including C, C ++, Java, Kotlin, Flutter, Dart, PHP, Laravel, Python, SQL, .NET, Django, CSS, JavaScript, TypeScript, Angular, Spring Boot, computer vision, among others. More: cesarmauri.com I've worked with clients worldwide, both directly and through platforms like Malt and Shakers. Be among the first to hire me on Upwork! Let's talk?

I won't let tech problems stop your success. Running a webshop means juggling inventory, marketing, customer service, and sales. The last thing you need is tech headaches slowing you down. That's where I come in. What I Do: I'm your one-stop solution for everything tech-related to your webshop. Think of me as your complete IT department - handling site reliability, performance optimization, security, integrations, troubleshooting, and ongoing maintenance. How I'm Different: I explain everything in plain language. No jargon, no confusing tech speak - just clear answers and solutions that make sense. You'll always understand what's happening with your site and why. Services Include: ✓ Site monitoring and uptime management ✓ Performance optimization and speed improvements ✓ Security audits and protection ✓ Platform migrations and upgrades ✓ Third-party integrations (payment gateways, shipping, inventory systems) ✓ Emergency troubleshooting and fixes ✓ Ongoing maintenance and support ✓ Technical consulting in human language Ideal For: Webshop owners who want reliable tech support without the complexity. Whether you're on Shopify, WooCommerce, Magento, or custom platforms, I've got you covered.