🏅 I help businesses and startups build reliable web and mobile apps that deliver real value to their users. For 6+ years, I have developed and launched apps that are now live on both the Google Play Store and App Play Store, as well as web solutions. 💻 My expertise are centered around: Android Development | iOS Development | Java Coding | Kotlin Programming | Swift | Laravel Applications | PHP Solutions ✅ Agile Methodology ✅ High quality solutions ✅ MVC / MVP / VIPER / MVVM ✅ 20+ Live apps on Google Play Store and App Store ✅ Android Studio | Xcode | Laravel I follow an Agile approach, which means I keep communication clear, deliver in stages, and adapt quickly to feedback. My goal is not just to complete a project but to help you launch something that performs well and supports your business goals. 💬 FREE INITIAL CONSULTATION: Let's Talk about your idea and build something that your users will love.

I have been a mobile application developer for 11+ years across Android, iOS, Unity, and React. My mobile application development skills are spread across a broad range of fields. I have developed applications for universities, public health authorities, county governments, FDA-regulated companies and many other disciplines. My skills are mainly in React, Unity (C#), Java, Kotlin (Android), Objective-C and Swift (iOS). I also have experience with Firebase, Oracle SQL, Python, and JavaScript applications.

I'm a senior software engineer with extensive experience building scalable APIs, cloud platforms, and mobile applications used by billions of users. I’ve worked on production systems at companies like Meta Platforms and T-Mobile, and I bring that same engineering discipline and reliability to every client project. Throughout my career I’ve designed and built backend systems, microservices, and mobile applications that power real products. I specialize in building software that is not only functional but also scalable, maintainable, and ready for long-term growth. In addition to enterprise experience, I’ve also worked extensively with startups and small teams, helping them move quickly from concept to working software. I understand the balance between moving fast and building systems that won’t break as your product grows. Whether you're launching a new product, building an MVP, integrating APIs, or improving an existing platform, I focus on delivering solutions that are reliable, efficient, and designed with best engineering practices. What I Can Help You Build Backend & API Development • REST APIs and microservices • Backend platforms and system architecture • Secure authentication systems (OAuth, Cognito, etc.) • Third-party API integrations • High-performance backend services Cloud & Infrastructure • AWS architecture and deployment • Serverless systems (Lambda, event-driven systems) • Scalable cloud platforms • Database design and optimization • DevOps and deployment pipelines Mobile Applications • Cross-platform mobile apps using Flutter • API integration for mobile apps • Authentication, file uploads, and backend communication • Performance optimization and debugging Technologies I Work With Python • C# • Flutter • REST APIs • AWS • Serverless • PostgreSQL • MongoDB • Microservices • Cloud Architecture • Docker • Event-Driven Systems Recent Types of Projects • Designing backend APIs that support mobile applications • Building serverless cloud systems on AWS • Creating MVP platforms for startups • Integrating complex third-party APIs • Optimizing backend performance and reliability • Debugging and stabilizing production systems Why Clients Work With Me Clients hire me because I bring both enterprise engineering experience and startup speed. I understand how to quickly identify the core problem and deliver solutions that work in production. You can expect: • Clear and professional communication • Clean, maintainable code • Thoughtful system design • Reliable delivery and follow-through I treat every project like a product that will need to scale and evolve over time, not just a quick patch or temporary solution. Education Master’s Degree – Computer Science Bachelor’s Degree – Computer Science If you're looking for an experienced engineer who can help you build, scale, or improve your software, I'd be happy to learn more about your project.

I'm an experienced Android, Windows, iOS and Firmware Reverse Engineer. I have a lot of experience in reversing applications, games, programs and systems. With +15 years of hands-on experience in Reverse Engineer and Malware Analysis, I am also a cybersecurity expert with experience in cybersecurity research and development at a world-class R&D laboratory in the field of Cyber ​​Operations. In this work, I gained experience in network traffic analysis, malware analysis and cryptography. My main skills: * Extract Data, Code, Algorithms, Signatures and Network Addresses from Android Apps, iOS App and Windows App * Deep expertise in Smali bytecode * Decompile Apk File and convert to full source code * Application Modification for Add, Remoave, Modify Functionalities * Bypass SSL pinning. Interception, Modification and Analysis of Network Traffic * Creation of Private API for a Applications or Programs * Decompilation, Debugging, Analysis and Modification of Native Android Libraries * Know arm and x86 assembler * Expertise in analyzing sophisticated malware using tools like IDA Pro, Ghidra, and x64dbg. * Have Experience in Reverse Unity, Cocos, Kony Android Apks * Debuggers, Disassemblers with Windows x86 and x64. * Creating Scripts/Plugins for Deobfuscation * Reversing iOS, Android Apps and Developing Tools to Automate * Server solutions (including serverless solutions) * interaction with BLE devices (BLE 4, BLE 5 Coded Phy) * Mobile apps Reverse Engineering (decompilation, creation of mods, API extraction, decryption) * Android APK patching and Binary Patching, Binary Decompilation * Root Detection and Emulator Detection Bypass * Network Traffic Analysis and Malware Analysis * Deobfuscation and Unpacking Applications * Web-Scraping/Crawling and Automation Expert * Browser Automation & Testing with Leverage Selenium, Multilogin, and Puppeteer * Data Analysis & Manipulation * Making custom tools for unpacking executable files as standalone tools and as plugins for debuggers * Reverse engineering eprom communication and ecu reverse engineering * firmware reverse engineering and hardware reverse engineering * Creating scripts/plugins for automatic and semi-automatic deobfuscation with IDA * Developing disk/storage/volume stack drivers * reversing iOS / android apps and developing tools to automate it * Advanced Web Scraping Techniques external APIs, uncovering hidden functionalities and potential enhancements through reverse engineering. * Digital Forensics Expert

I build computer vision, mobile AI, and LLM agent systems that run in production — not proof-of-concepts. $600K+ earned · 100% Job Success · Top Rated Plus · 50+ apps shipped · 10+ years.   🎥 Computer Vision & Video AI Real-time detection, tracking, and video pipelines built for live production. - Built real-time tracking for a US sports company — processing live camera feeds frame-accurate for automated broadcast. - Image registration & feature matching (homography, SIFT/ORB) for frame alignment and multi-frame processing. - Edge & on-device optimization: quantization, ONNX / TFLite / CoreML export, low-latency real-time inference. Stack: YOLO, OpenCV, C++ inference, homography, SIFT/ORB, FFmpeg, ONNX, CoreML, TensorFlow Lite.   📱 Mobile AI — iOS & Android Where mobile meets ML: I ship AI that runs on the device, not just calls to a server. - On-device inference with CoreML & TensorFlow Lite — quantized, optimized models running in real time, offline, no backend round-trip. - Real-time computer vision on phones — live camera detection & tracking running directly on iOS/Android hardware. - AI embedded in the core product flow — vision and ML features, not a bolted-on toggle. - 50+ apps shipped over 10+ years across healthcare, fintech, wellness, and sports. Swift, SwiftUI, Kotlin, Jetpack Compose, Flutter, React Native.   📊 Data & ML Pipelines - Built a PySpark clustering pipeline for a US energy AI company — segmented ~1M households into 50–200 cohorts, production-grade with a validation framework. 🛠 Stack Vision: YOLO, OpenCV, C++ inference, homography, FFmpeg, CoreML, TensorFlow Lite Mobile: Swift, SwiftUI, Kotlin, Jetpack Compose, Flutter, React Native AI/LLM: Claude, GPT, Gemini, LangChain, LangGraph, RAG, vector DBs, n8n ML/Data: Python, PyTorch, TensorFlow, PySpark, Pandas, scikit-learn Cloud: AWS Bedrock, Azure OpenAI, Vertex AI, Firebase 🌎 Based in Buenos Aires (GMT-3) — solid overlap with US & EU business hours. English: Fluent. Weekly updates, clear timelines, honest scoping — if something needs to change mid-project, you hear it early, with options. Send me the problem — I'll tell you how I'd approach it and how long it'll take. Message me to start

You have a product idea, a business problem, or a system that needs to be built right. We've done this 100+ times. AB Ark is a 12-year-old software agency that builds AI-powered web apps, mobile products, SaaS platforms, and enterprise ERP systems — end to end, from discovery to deployment. We don't just write code. We think like product owners. Our team includes BAs, architects, UI/UX designers, and senior engineers who have shipped products across healthcare, fintech, real estate, e-learning, logistics, and more. ━━ What we build ━━ ✦ SaaS platforms & web applications (React, Node, Laravel, Python) ✦ Mobile apps — iOS, Android, Flutter (cross-platform) ✦ AI & automation — ChatGPT integrations, intelligent workflows, ML pipelines ✦ ERP & custom enterprise software — operations, HR, supply chain, finance modules ✦ MVP development — structured 2–4 week sprints with working prototypes ━━ Why clients choose us ━━ ✦ Full BA process — wireframes, user flows, and architecture before a line of code ✦ Fixed-scope or milestone-based contracts — no bill shock ✦ Direct access to senior engineers, not outsourced to juniors ✦ Post-launch support & maintenance included ━━ Tech stack ━━ React.js · Next.js · Node.js · Python · React Native · Swift · Kotlin · AWS · Docker · PostgreSQL · MongoDB · OpenAI API · LangChain If you're evaluating agencies, here's what I suggest: share your project brief and I'll send back a scoped proposal with wireflows and architecture ASAP — at no cost. Let's build something great together.

I help founders and teams build scalable web applications, AI-powered products, and automation systems that are clean, reliable, and ready for real users. With 8+ years of full-stack experience, I work across React, Next.js, Node.js, Python, Django, NestJS, and modern cloud stacks to turn ideas into polished digital products. I also specialize in building AI-powered solutions, including LLM applications, RAG systems, intelligent workflows, and automation tools. My focus goes beyond writing code—I build systems that are fast, secure, easy to maintain, and aligned with real business goals, helping teams reduce manual work and make smarter decisions. Recent wins: ➢ Design to Run — Rebuilt data workflows for a political organization, reducing manual work by 50%. ➢ StrainBrain — Built an AI recommendation engine that increased cannabis eCommerce conversions by 23%. What I can help with: • Full-stack web apps and SaaS platforms • AI automation and LLM integrations • RAG systems and vector search • Agentic AI workflows • API integrations, dashboards, and internal tools • Cloud deployment, CI/CD, and scalable backend systems Clients choose me for clear communication, strong ownership, and practical solutions that move projects forward. If you need a developer who understands both product and engineering, I’d be happy to help.

15+ years in UI UX Design and 100+ product projects delivered, helping teams improve activation, conversion, retention, and usability. I'm a UI UX Designer who turns complex ideas into clear, build-ready interfaces across SaaS & Web App Design, Website Design, and Mobile App Design. WHAT I DO (CLIENT RESULTS FIRST) If you need a UI UX Designer who can simplify complexity without dumbing down the product, you're in the right place. My UI UX Design work is built to: • Increase onboarding completion and time-to-first-value with clearer flows • Improve conversion on key actions, sign-up, upgrade, checkout, booking • Reduce user confusion and support tickets with complete UI states and better UX writing • Speed up delivery with a scalable system your team can reuse • Align design and engineering so Web App Design and Mobile App Design ship as intended TYPICAL METRICS CLIENTS AIM TO IMPROVE Results depend on product, traffic, and implementation, but UI UX Design improvements commonly target: • +10-30% onboarding completion and activation • +5-20% conversion on core flows, sign-up, upgrade, checkout • -15-35% confusion-driven support tickets by fixing states and clarity issues • Faster releases by reducing UI rework and standardizing components WHERE I ADD THE MOST VALUE I've worked across B2B and B2C products for 15+ years, and my UI UX Design experience covers everything from early MVPs to mature platforms. My selected portfolio includes 19+ SaaS and dashboard web apps, 14+ websites and landing pages (marketing, product, and eCommerce), and 11+ mobile apps (iOS and Android). As a UI UX Designer, I'm especially effective on products with real logic: dashboards, admin panels, tables and filters, multi-step forms, roles and permissions, settings and billing, and mobile feature flows. MAIN SERVICES (UI UX DESIGN) • End-to-end UI UX Design for new products and MVPs • Web App Design for SaaS platforms, dashboards, admin portals, internal tools • Website Design for marketing sites, product sites, landing pages, and eCommerce, built in Figma for Webflow, WordPress, or Framer • Mobile App Design for iOS and Android, onboarding, engagement, subscriptions • UX audits, heuristic reviews, redesign roadmaps (quick wins and long-term fixes) • User flows, information architecture, wireframes, prototypes, interaction specs • Design systems, components, tokens, documentation for consistent UI UX Design WHAT YOU RECEIVE Hiring me as your UI UX Designer means you get production-ready UI UX Design that reduces rework: • A clean Figma file organized for handoff, components, variants, tokens, styles • Responsive Web App Design layouts with clear hierarchy and data density rules • Conversion-focused Website Design and landing pages with clear hierarchy, strong CTAs, and responsive layouts • Mobile App Design screens aligned to native patterns and real device constraints • Full state coverage, loading, empty, error, disabled, permission-based states • Interaction notes for forms, tables, filters, modals, onboarding, key actions • Optional implementation support, I review builds and keep UI UX Design consistent HOW WE'LL WORK TOGETHER 1. Align on goals, users, constraints, success metrics 2. Map journeys and edge cases, then iterate in wireframes 3. Create high-fidelity UI UX Design in Figma for Web App Design or Mobile App Design 4. Build or extend the system to prevent inconsistencies across screens 5. Handoff with clear specs, then support QA so what ships matches the UI UX Design TOOLS AND COLLABORATION Primary tools: Figma, FigJam. Collaboration: Notion, Jira, Slack, Google Workspace. I design with component-based thinking and can align UI UX Design to React and Next.js patterns, Tailwind, shadcn-style components, and design tokens so Web App Design implementation is straightforward. For Website Design I design in Figma and hand off clean, build-ready files for Webflow, WordPress, or Framer. WHY CLIENTS CHOOSE ME • Strong product judgment, I ask the right questions early to avoid rework • Clear communication, fast iterations, no surprises • UI UX Design that balances usability, brand, engineering constraints • A UI UX Designer who delivers consistent Web App Design and Mobile App Design systems, not one-off screens NEXT STEP Send your product link (or brief), current challenges, and timeline. I'll reply with a practical plan, clear deliverables, and the fastest path to measurable improvement in your UI UX Design.

🚀 $50M+ in Client Revenue | 100% Job Success | 8+ Years on Upwork I specialize in Mobile app development for products that are intended to run in production, support real users, and continue evolving over time. My work in Mobile app development is focused on stability, clear architecture, and avoiding short-term decisions that create long-term cost. I typically work on apps that need to be maintained, extended, and operated by teams long after the initial release. As a Hybrid app developer, I take responsibility for how mobile applications behave across platforms and over time. Being a Hybrid app developer means more than sharing code between iOS and Android. It means making architectural choices that reduce future risk, keep development predictable, and allow teams to continue building without constant rewrites. That mindset shapes how I approach Mobile app development from the start. 📱The majority of my Mobile app development work is built with React Native. I use React Native in production environments where reliability and clarity matter. React Native can scale well when it’s structured properly and treated as a long-term system rather than a shortcut. As a Hybrid app developer, I focus on clear data flow, predictable behavior, and codebases that teams can safely evolve. React Native is central to how I deliver maintainable Mobile app development. Alongside React Native, I have hands-on experience with Flutter in production mobile applications. This broader exposure helps me make informed decisions as a Hybrid app developer, rather than forcing a single framework into every situation. I also regularly work with existing react native projects that require refactoring, stabilization, or preparation for long-term ownership. 📊 Across my Mobile app development work, applications I’ve contributed to have surpassed 1M combined downloads and support tens of thousands of monthly active users. Several of these products are still actively developed years after launch. As a Hybrid app developer, I view longevity and operational stability as the real indicators of success in Mobile app development, not just release milestones. I often work as a full stack developer alongside Mobile app development, designing and integrating backend services, APIs, and infrastructure. My background as a web developer helps ensure mobile apps fit cleanly into larger systems that include dashboards, internal tools, and third-party integrations. This end-to-end perspective reduces friction and keeps Mobile app development aligned with the rest of the product. 🧠 In practice, my work as a Hybrid app developer commonly involves: - structuring or refactoring React Native applications - improving runtime stability and performance - reducing complexity in growing Mobile app development codebases - preparing MVPs to evolve into long-term products I’ve seen enough Mobile app development projects to know where they usually break down. As a Hybrid app developer, I try to prevent that by keeping React Native apps straightforward, well-organized, and easy to change. I avoid clever shortcuts and patterns that look good early but create problems later. The aim is steady, predictable progress rather than fragile speed. 🛠️ A significant part of my work involves taking over mobile apps that have become difficult to maintain. Many React Native projects move quickly at the beginning and accumulate hidden complexity. I regularly step into these situations to simplify structure, clarify boundaries, and make ongoing Mobile app development manageable again. In many cases, this has more impact than adding new features. 🔄 Mobile app development is iterative by nature. Requirements change, usage patterns evolve, and teams grow. As a Hybrid app developer, I design React Native applications so they can adapt without destabilizing the system. This flexibility is especially important for early-stage products transitioning into long-term platforms. I care about how teams interact with the code after delivery. As a Hybrid app developer, I aim for React Native projects that internal developers, designers, and product owners can open and work with confidently. Clear structure and readable logic make everyday Mobile app development far less error-prone. 🌱 Many of my Mobile app development engagements start at the MVP stage and continue through multiple growth phases. I deliberately avoid disposable prototypes. As a Hybrid app developer, I use React Native to move efficiently while establishing foundations that support future features, scaling, and team handover. 🤝 Clients typically engage me as a Hybrid app developer when they need clear ownership beyond initial delivery. Using React Native in real production contexts, I focus on building Mobile app development systems that are stable under real usage, maintainable by teams, and structured to evolve without repeated rework.

𝙁𝙞𝙣𝙩𝙚𝙘𝙝 𝙬𝙚𝙗 𝙖𝙥𝙥𝙡𝙞𝙘𝙖𝙩𝙞𝙤𝙣𝙨 𝙖𝙧𝙚 𝙢𝙮 𝙨𝙥𝙚𝙘𝙞𝙖𝙡𝙩𝙮—𝙄 𝙗𝙪𝙞𝙡𝙙 𝙘𝙤𝙢𝙥𝙡𝙚𝙭, 𝙨𝙘𝙖𝙡𝙖𝙗𝙡𝙚 𝙖𝙥𝙥𝙨 𝙪𝙨𝙞𝙣𝙜 𝙅𝙖𝙫𝙖𝙎𝙘𝙧𝙞𝙥𝙩, 𝙏𝙮𝙥𝙚𝙎𝙘𝙧𝙞𝙥𝙩, 𝙖𝙣𝙙 𝙉𝙤𝙙𝙚.𝙟𝙨. 𝙄 𝙬𝙤𝙧𝙠 𝙬𝙞𝙩𝙝 𝙛𝙖𝙨𝙩-𝙜𝙧𝙤𝙬𝙞𝙣𝙜 𝙛𝙞𝙣𝙩𝙚𝙘𝙝 𝙘𝙤𝙢𝙥𝙖𝙣𝙞𝙚𝙨 𝙩𝙝𝙖𝙩 𝙣𝙚𝙚𝙙 𝙡𝙤𝙣𝙜-𝙩𝙚𝙧𝙢 𝙨𝙩𝙖𝙛𝙛 𝙖𝙪𝙜𝙢𝙚𝙣𝙩𝙖𝙩𝙞𝙤𝙣. 𝙒𝙝𝙖𝙩 𝙄'𝙢 𝙗𝙚𝙨𝙩 𝙖𝙩: 1️⃣ Custom FinTech Web Apps: I specialize in building long-cycle web applications for product-based companies. Whether you're building a fintech platform from scratch or need ongoing development, I ensure high-quality, scalable results using JavaScript and TypeScript. 2️⃣ API Development & Integration: From building custom RESTful APIs to integrating complex third-party services, I make sure your web app easily connects with the necessary tools using Node.js, Python, and SQL. 3️⃣ Database Architecture & App Development: Creating efficient and secure database architectures is key for any fintech product. I design systems that are both scalable and secure, optimizing them for high performance in fintech environments. 4️⃣ Mockup & UI/UX Design: Before jumping into development, I make sure your project is visualized through detailed mockups, helping to craft the user experience while focusing on functionality. 𝙏𝙤𝙥 𝙎𝙠𝙞𝙡𝙡𝙨: ✔️ FinTech Web App Development ✔️ JavaScript & TypeScript ✔️ API Development & API Integration ✔️ Node.js & Python ✔️ Database Architecture & SQL 𝘾𝙤𝙣𝙩𝙖𝙘𝙩 𝙢𝙚 𝙩𝙤 𝙙𝙞𝙨𝙘𝙪𝙨𝙨 𝙝𝙤𝙬 𝙄 𝙘𝙖𝙣 𝙝𝙚𝙡𝙥 𝙜𝙧𝙤𝙬 𝙮𝙤𝙪𝙧 𝙛𝙞𝙣𝙩𝙚𝙘𝙝 𝙗𝙪𝙨𝙞𝙣𝙚𝙨𝙨!