Senior Full-Stack & Mobile Developer with 8+ years of experience building scalable web and mobile applications. Strong background in React Native, PHP, Node.js, and Python, with hands-on leadership experience as a React Native Team Lead. Proven track record of delivering successful products for clients across Turkey, Kosovo, Belgium, and Switzerland, with a focus on clean architecture, performance, and long-term maintainability.

I’m a Web & Mobile Developer with a strong background in Quality Assurance, giving me a development approach focused not only on building features, but also on reliability, usability, and product quality. I develop modern web and mobile applications from frontend interfaces to backend APIs, databases, integrations, and deployment. My previous QA experience helps me identify edge cases early, troubleshoot complex issues, and deliver stable applications with fewer production problems. I can help with: * Full-stack web application development * iOS & Android mobile development * React / Next.js frontend development * React Native & Flutter applications * Node.js & Python backend development * REST API and third-party integrations * SaaS and business application development * Database design and integration * Bug fixing and performance optimization * QA, testing, and application troubleshooting * Existing application maintenance and modernization * Cloud deployment and CI/CD I’m comfortable working with existing codebases as well as developing products from scratch, with a focus on clean implementation, maintainability, and a smooth end-user experience.

I am an experienced Mobile Application Developer with over 8 years of experience creating modern mobile applications. I am skilled at providing mobile applications development services with a focus on user experience, performance, and meeting business objectives. As an app developer, I design and create custom mobile apps from concept all the way through deployment, utilizing my skills in both UI/UX design and efficient mobile development techniques. My background is in the development of mobile applications including design, frontend & backend development, APIs, integration of third party services and developing AI-powered mobile applications. AI-based apps have a variety of capabilities that are based on AI technology. The capabilities include, but not limited to, intelligent automation, smart features, data-driven interactions, and integration of AI services. In my mobile apps development projects, I always seek to get an understanding of the client's vision, design friendly interface, and develop applications that will be ready to be used by real people. Should you be looking for mobile app development, either from scratch or making improvements to existing application or adding AI capabilities to your project, I can assist you.

AI has changed how fast we can write code, but it hasn't changed the laws of software engineering. An LLM can generate a script, but it takes a senior architect to build a secure, scalable, and deterministic product. With 20 years of full-stack engineering experience and $400k+ in successful Upwork deliveries, I bridge the gap between experimental AI and production-ready software. I don't just use AI coding tools (Claude Code, Cursor, etc.) to ship features 5x faster - I literally build the open-source infrastructure that orchestrates them (see ProPR below). Whether you need to untangle a hallucinating chatbot, architect a multi-tenant WhatsApp AI platform, or build a complex SaaS from the ground up, I bring product judgment and systems-thinking to the table. I build AI systems that operate on constraints and verified data, not just "vibes." WHAT I DO: 🧠 Agentic AI & Conversational Systems I build AI systems that actually do things. • Custom Chatbot Platforms: Built SaaS builders for WhatsApp, automated customer support pipelines, and specialized AI personas. • Multi-Agent Orchestration, tool calling, multi-step reasoning, and human-in-the-loop handoffs. • Advanced RAG (Retrieval-Augmented Generation) and vector database integration. • Integrating Claude, OpenAI, and open-weight models via APIs and MCP (Model Context Protocol). ⚡ AI-Accelerated Full-Stack & Infrastructure I work hands-on in the codebase daily leveraging AI to ship robust applications at startup speed. • Modern Stack: TypeScript, Next.js, Node.js, Python (FastAPI). • Edge & Cloud: Heavy use of Cloudflare (Workers, D1, R2) for blisteringly fast, low-cost deployments. • Payments & APIs: Seamless integrations with Stripe, Polar, and complex SaaS billing models. • Data & Auth: PostgreSQL, Supabase, Redis. 🛠 AI System Diagnostics & DevOps Is your current AI app slow, generic, or constantly hallucinating? I conduct diagnostic sprints to fix prompt architectures, optimize RAG retrieval, and bring reliability back to your product. I also leverage AI for rapid DevOps—triaging production issues and automating server management to keep downtime near zero. RECENT HIGHLIGHTS: 🚀 Creator of ProPR (propr.dev): Architected and launched an open-source orchestration platform that turns AI agents into PR-producing engineers. Built a complex CI/CD pipeline for AI utilizing isolated Docker workspaces and deterministic Git handling. Proven at scale: used internally for over a year to autonomously write and merge over 2500 pull requests. 🚀 Conversational AI SaaS: Developed a comprehensive WhatsApp chatbot builder platform, intelligent customer support agents, and viral AI personas (including specialized coding agent parodies). 🚀 High-Volume Fintech/Mobile: Led development for a suite of financial trading applications achieving over 10M+ combined downloads, ensuring high-concurrency safety and strict ledger integrity. HOW I WORK: I am a builder, not just an advisor. I scope the architecture, write the code, verify the agent outputs, and own the production launch. If you need a senior technical partner who treats code as a liability and optimizes for speed-to-market, let's talk.

I specialize in developing high-performance mobile applications using Flutter, with 2 years of focused experience in the field. My journey began as an intern, where I honed my skills, and progressed to a mid-level developer, delivering robust apps that enhance user experiences. I understand the intricacies of the Flutter framework and leverage its capabilities to create cross-platform solutions efficiently. Whether you need a fresh app idea brought to life or improvements on an existing project, my attention to detail and problem-solving mindset ensure quality outcomes. I collaborate closely with clients to grasp their vision and implement features that resonate with their target audience. If you're seeking a reliable Flutter developer who can deliver results and adapt to your requirements, let’s discuss how I can contribute to your project.

Shopify developer and founder of One More Agency — 11 years building websites for brands around the world, focused on custom Shopify builds and ongoing development partnerships for the past 6 years. What I do best: full Shopify site builds from Figma (or from sketches), custom theme work on Dawn, Horizon, and OS 2.0 foundations, and the kind of tailored functionality off-the-shelf apps can't handle — custom subscription flows, rewards systems, multi-region storefronts, and WordPress to Shopify migrations. Recent work includes luxury skincare (Auteur), fashion (Anielka), lifestyle and movement (Sol Seok), kids' devices (Tin Can), apparel (Faherty, Pole Junkie), and subscription services (Billy Bubbles). I run a small team, which means I can take on larger projects without the quality dropping — when you hire me, you get a developer with a studio behind him when the brief grows. Comfortable working with clients who have a clear brief, and equally comfortable with the ones who have a rough idea and need someone to help shape it. Responsive, honest about tradeoffs, and happy to tell you when something won't work and find a better way.

A reliable tech expert that turn your ideas into functional, high-performing applications. With over 10 years of experience in mobile app development, website creation, and software engineering, I specialize in building user-friendly solutions tailored to your unique needs. My expertise includes: Mobile App Development: Native (Swift, Kotlin) & Cross-platform (Flutter, React Native). Website Development: WordPress, custom coding with HTML/CSS/JavaScript, and frameworks like Laravel or Django. Software Solutions: Custom CRM, ERP systems, and cloud-based applications. I’m dedicated to: Crafting visually stunning, responsive designs. Writing clean, efficient code for long-term scalability. Delivering on-time and on-budget solutions.

Pieter Taljaard I am an AI-assisted App and Web Developer specializing in transforming ideas into polished, production-ready digital products. By combining modern development platforms with advanced generative AI technologies, I rapidly design, build, test, and refine applications that deliver exceptional user experiences and real business value. My experience spans the complete software development lifecycle—from product strategy and UI/UX design to front-end development, back-end integration, API implementation, database architecture, testing, deployment, and App Store publication. Through the development of a complex commercial software platform, I have gained hands-on expertise in creating scalable mobile applications, responsive websites, user authentication systems, subscription models, cloud-based services, AI-powered features, analytics integration, and iterative product improvement. Technical skills include: AI-assisted software development using modern generative AI tools iOS application development Responsive web development UI/UX design and user-centered product development API integration and third-party services Authentication and user account management Subscription and in-app purchase implementation Cloud-based architecture and data management Product planning, feature roadmapping, and MVP development Quality assurance, debugging, and performance optimization App Store submission and release management Technical documentation and product presentation Beyond technical development, I bring an entrepreneurial mindset to every project. I understand how to balance user experience, business objectives, scalability, and speed of execution while continuously leveraging AI to improve development efficiency and software quality. I am passionate about working with startups, entrepreneurs, and established businesses to create innovative digital solutions. Whether developing a mobile application, building a modern website, integrating AI capabilities, or bringing a new product from concept to market, I focus on delivering professional, reliable, and high-quality results that create lasting value.

# Founder | Fractional CTO | Principal Software Engineer I help companies solve the engineering problems that matter most—scaling products, modernizing platforms, rescuing troubled projects, and leading engineering organizations through periods of growth and change. Over the past 20+ years, I've built software across startups and Fortune 500 companies, delivering products spanning cloud platforms, mobile applications, embedded systems, real-time software, distributed systems, and developer infrastructure. I remain a hands-on engineer who enjoys diving into difficult technical challenges while providing the strategic leadership needed to move organizations forward. My expertise includes: - Software architecture and system design - AI-enabled applications and platform integration - Cloud-native development (AWS, Azure, Kubernetes) - Mobile and cross-platform application development - Embedded and real-time systems - Engineering leadership and organizational scaling - Technical due diligence and architecture reviews - Product strategy and execution Clients typically bring me in when the stakes are high: - A critical product needs to ship. - A platform isn't scaling. - An engineering team needs stronger technical leadership. - Legacy systems require modernization. - A startup needs an experienced technical partner without hiring a full-time CTO. As a founder and servant leader, I believe the best technology organizations are built by empowering engineers, establishing sound technical practices, and maintaining a relentless focus on customer value. I communicate effectively with executives, product leaders, and engineering teams alike, translating complex technical decisions into practical business outcomes. If you're looking for someone who can both define the technical strategy and execute it alongside your team, let's talk.

As a Senior Simulation Engineer in the defense and training sector, I specialize in the "hard layer" of Unity development: OpenXR, SteamVR, and complex hardware integrations. I don't just build games; I build stable, industrial-grade simulation systems that require 100% reliability. If your project is stuck because your Vive Trackers are drifting, your OpenXR loader is conflicting, or your custom hardware isn't communicating with Unity, I am the specialist you call to solve it. My Core Expertise: VR/XR Hardware Integration: Deep experience with HTC Vive Ultimate Trackers, Pogo Pin inputs, and custom peripheral setups. OpenXR & SteamVR: Troubleshooting loader conflicts, interaction profiles, and cross-platform compatibility issues in Unity 6 and 2022 LTS. Unity Systems Architecture: Building modular, scalable systems (ScriptableObjects, Addressables) that allow your team to iterate faster without breaking the build. Why Hire Me? I Save You Time: I know exactly why the Vive OpenXR plugin only supports pose data and how to bypass it. I know the weird quirks of URP in VR. I solve in hours what takes generalists weeks to figure out. Industrial Standards: I write clean, documented, and performant C# code designed for long-term maintenance, not just a quick hack. Whether you need a critical bug fixed or a robust interaction system built from scratch, let's get your build working. Availability: Open for short-term troubleshooting and specialized consulting contracts.