I’m a UK based mobile app developer, product designer and system architect with over 15 years of experience building reliable software for businesses. I specialise in native Android and iOS development, creating applications that are designed specifically for the platforms they run on. I also build the backend systems, APIs, databases and web platforms required to support complete digital products. My experience covers the full development lifecycle, including planning, product design, system architecture, mobile development, backend development, database design, integrations, deployment and ongoing support. I work with: • Kotlin, Java and Jetpack Compose • Swift and SwiftUI • C# and ASP.NET Core • SQL Server and database design • Firebase authentication, storage and notifications • REST APIs and SignalR • IIS deployment and system integrations I have extensive experience building software for logistics, delivery, warehouse, transport and field service businesses. This includes job management, route planning, GPS tracking, proof of delivery, barcode scanning, mobile printing, timesheets, checklists, stock management, real time chat and operational reporting. I am also the founder of PaddyMDev and the developer behind Pocket Freight, a delivery management platform for mobile and web, and Ever Afterly, a wedding planning platform available on Android and iPhone. I can help with new mobile app development, existing app improvements, legacy system modernisation, backend APIs, database development, integrations and complete product builds. I focus on clear communication, practical solutions and software that is reliable, maintainable and built around real business requirements.

Passionate and creative App Developer with experience in building modern mobile and web applications. Skilled in Android, iOS, UI/UX design, and scalable software solutions. Dedicated to delivering innovative, user-friendly, and high-performance digital products that help businesses grow and succeed in the digital world.

Tired of generic, template-based products that not convert? I’m a Product Designer specializing in custom UX/UI for web and mobile apps. I design data-driven digital products built from scratch, not templates, using user research, analytics, and experimentation. I work in Figma, creating high-fidelity prototypes ready for testing and developer handoff. I’m a Product Designer with 7+ years of experience, focused on data-driven UX and UI. I’ve designed close to 100 digital products across web platforms, SaaS products, and mobile apps, working from early discovery to high-fidelity Figma prototyping and launch. 💡 How I Can Help You End-to-End Product & UX Design From research and strategy to design, testing, and iteration. Custom UX/UI Design, No Templates Every interface is designed from scratch for web and mobile apps to ensure a premium, differentiated product. Data-Driven Design Decisions UX and UI informed by user research, usability testing, analytics, and experimentation. Figma Prototyping & Interaction Design High-fidelity prototypes in Figma for web and mobile apps, ready for validation and developer handoff. Web Product & Platform Design Strong experience designing scalable web platforms, responsive systems, and complex information architecture. Mobile App UX/UI Design User-centered design for iOS and Android apps, optimized for usability and growth. CRO & UX Writing Design and messaging optimized to improve conversion, engagement, and retention. Scalable Design Systems Accessible, consistent UI systems designed to grow with your product. ⭐ Client Review “Where do I start, Andrea is a true diamond in the rough. My biggest thing when looking for a designer was getting away from designs that felt templated and outdated. There are so many things that can go wrong when it comes to design and she makes sure it all goes right, by applying her expertise while also taking feedback and considering your vision. I’m operating multiple growth partnerships for 7–8 figure brands and found Andrea in the thick of building my team of A players. If you’re not collaborating with her yet, have a call with her, do a test project and you’ll see what I mean. Thank you for everything Andrea!!!” 🎯 Core Skills Product Design | UX/UI Design | Web & Mobile App Design | Figma Prototyping | User Research | Wireframing | Information Architecture | Usability Testing | CRO | Data-Informed Design | UX Writing | Accessibility | SEO for Web & App Products ⚙️ Tools Figma | Webflow | WordPress | Shopify | Design Systems | Prototyping | Analytics Tools | Photoshop | Illustrator If you’re looking for a Product Designer who builds custom UX/UI from scratch, values data over assumptions, and designs products that scale, let’s talk. Happy to start with a test project or a discovery call.

I'm a developer & project manager, with experience working with small to medium sized businesses and startups, My expertise ranges from developing desktop, mobile or VR applications to setting up websites in either webflow or wordpress. I keep close track and provide progress updates on my work, and have managed groups of developers via leading daily calls, organising the workload, planning and assigning tasks etc.

### Senior Software Developer | Java, Spring Boot, Angular, React & Microservices I’m a Senior Software Developer specializing in **Java, Spring Boot, Angular, React, and microservices**, with strong experience building secure, scalable, and maintainable enterprise applications. I can help you with: * **Backend:** Java, Spring Boot, REST APIs, Microservices, JPA/Hibernate * **Frontend:** Angular, React, TypeScript, JavaScript * **Architecture:** Microservices, RabbitMQ, event-driven systems, API integration * **Databases:** PostgreSQL, Oracle, SQL Server * **Security:** Spring Security, OAuth2, JWT * **DevOps:** Jenkins, CI/CD, Docker, Kubernetes, Ansible * **Testing:** JUnit, Mockito, integration testing * **XML:** XML processing, validation, transformation, and document-based workflows I’m experienced in integrating legacy and third-party systems, developing internal business processes, automating deployments, and delivering reliable solutions for complex enterprise environments. I focus on **clean code, solid architecture, performance, security, and long-term maintainability**. Whether you need a complete application, a new microservice, an API, frontend development, or help improving an existing system, I can take ownership from design through implementation and deployment.

17,500+ hours, $700K+ earned — building React and Next.js applications since 2014. I also design, ship, and operate my own products, including a property marketplace with 30,000+ monthly active users. That means I'm not only implementing tickets. I've owned architecture, performance, releases, and support on products real users depend on daily, and I bring that judgment to client work. SELECTED WORK • Property Marketplace — Next.js + React Native/Expo in a Turborepo monorepo across web, mobile, and landing. Interactive district maps, price analytics, AI-powered search, three locales. • Crypto Portfolio Tracker — Next.js + React Native + Convex real-time backend, TypeScript throughout. Read-only Binance sync, non-custodial, OpenAI assistant. Published on the App Store. • Virtual Events Platform — Dolby io conferencing, Mux live streaming, PubNub chat, fan queue management. Built from scratch. • Legal Tech SaaS — enterprise matter management: budget tracking, D3/Recharts dashboards, GraphQL subscriptions, role-based permissions, document management. • Enterprise Asset Management — Scandit barcode scanning, virtualized lists over large datasets, drag-and-drop interfaces, calendar views, PDF generation, React Native app. MY OPEN SOURCE PROJECTS • lpm — runs Claude Code, Codex, and other AI coding agents in parallel on one codebase without branch conflicts. • voice-to-text — fully on-device dictation on the Apple Neural Engine. STACK React · Next.js · TypeScript · Node.js · React Native + Expo · Redux · GraphQL/Apollo · React Query · Convex · Firebase · Tailwind CSS · Material UI · shadcn/ui · D3 · Recharts · WebRTC · Socket IO · Playwright · Jest · Storybook · Turborepo · Vite Master's degree in Computer Science. Available 30+ hrs/week, response within four hours.

AI-Assisted Flutter Developer | Operating System Architect | Cross-Platform App Specialist I'm Christian Cassarly, an AI-assisted Flutter developer focused on building high-quality mobile applications, systems, and cross-platform software. I specialize in creating polished Flutter applications that are fast, intuitive, scalable, and designed for long-term growth. My largest project has been the design and development of a complete operating system experience built with Flutter. This project has strengthened my skills in UI/UX design, application architecture, AI integration, cloud services, custom interfaces, animations, and large-scale software organization. Beyond software development, my background includes writing books, financial education, healthcare experience, culinary arts, and a wide range of interdisciplinary interests. Bringing ideas together from different fields helps me approach software from multiple perspectives and design applications that are practical, innovative, and user-focused. What I can build Flutter mobile applications Cross-platform apps (Android, iOS, Desktop) AI-assisted applications Firebase integration Custom user interfaces Productivity systems Business applications Educational software Custom operating system interfaces Interactive experiences If you'd like to explore my design philosophy and the quality of my work, you're welcome to test the Jesus New OS Beta using the link below. It demonstrates the level of craftsmanship and creativity I bring to my client projects and serves as a preview of my long-term hardware vision, the PineCone phone. I value clear communication, professionalism, and respect for everyone's time. If you're serious about building an application or bringing an idea to life, I'd be glad to discuss your project. My goal is to provide exceptional value by delivering high-quality software at competitive pricing while maintaining strong attention to detail throughout development. If you're looking for someone who combines creativity, technical skill, AI-assisted development, and systems thinking to help bring your vision to life, I'd be happy to work with you.

Technical Project/Program Manager & Scrum Master with over 14 years of experience leveraging a robust PMP® and PSM™ background, I effectively manage sprint processes and regulatory project affairs, ensuring seamless software development life cycles (SDLC). Managed program strategy and diligent execution leading to enhanced client satisfaction and a culture of excellence in software engineering practices.

I build and scale production web applications—from architecture and APIs to polished frontends, integrations, and deployment. As a senior hands-on developer, I help companies turn complex workflows into reliable, maintainable products. My core services include: • End-to-end SaaS platforms, marketplaces, and internal business systems • Backend and API development with PHP/Laravel, Go, and Node.js • Frontend development with Vue.js, React, JavaScript, HTML, and CSS • AI/LLM, voice, telephony, payment, and third-party API integrations • Real-time systems using WebSockets, Redis, and event-driven services • PostgreSQL data modeling, performance optimization, and complex business logic • Existing codebase analysis, feature development, bug fixing, and modernization • Docker-based deployment, CI/CD, monitoring, and production support Recent work includes a real-time Voice AI SaaS platform for the US market, an operational platform connecting WMS, ERP, and TMS workflows for an international logistics company, a Go backend for a real-time trading system, and multilingual marketplace and restaurant products. I have worked as a Technical Lead, CTO, and Software Architect, but my primary focus remains hands-on development. I can own a product from initial technical discovery to production, join an existing engineering team, or take responsibility for a complex subsystem. Core stack: PHP, Laravel, Slim, Go, Node.js, JavaScript, Vue.js, React, Python, PostgreSQL, MongoDB, Redis, REST APIs, WebSockets, Docker, Git, and CI/CD. If you need a senior developer who can understand the business problem, make sound technical decisions, and deliver working software—not just isolated code—let’s discuss your project.

I rebuild Google Ads accounts for ecommerce brands where tracking is broken, bidding targets the wrong signal, and ROAS has stalled. 🏆 𝟮𝟬𝟮𝟱 𝗔𝗴𝗲𝗻𝗰𝘆 𝗼𝗳 𝘁𝗵𝗲 𝗬𝗲𝗮𝗿 for Ecommerce Development in Greece - Netstudio, where I lead Google Ads 🎯 𝗚𝗼𝗼𝗴𝗹𝗲 𝗔𝗱𝗪𝗼𝗿𝗱𝘀 𝗤𝘂𝗮𝗹𝗶𝗳𝗶𝗲𝗱 𝗜𝗻𝗱𝗶𝘃𝗶𝗱𝘂𝗮𝗹 + 𝗚𝗼𝗼𝗴𝗹𝗲 𝗣𝗿𝗲𝗺𝗶𝗲𝗿 𝗣𝗮𝗿𝘁𝗻𝗲𝗿 + 𝗜𝗦𝗢 𝟮𝟳𝟬𝟬𝟭 certified 📊 Dozens of Google Ads accounts built and managed end-to-end since 𝟮𝟬𝟬𝟴 📈 Client NPS 𝟲𝟳 - average client retention 𝟭𝟬-𝟭𝟱 𝘆𝗲𝗮𝗿𝘀 💼 𝟱𝟱-person senior EU team behind every Google Ads engagement: dev, CRO, and analytics at one desk "Google Ads structure rebuilt for our trade portal from scratch - B2B and B2C bidding separated at campaign and conversion-action level from day one. We finally have clean data showing which Google Ads channel drives distributors versus retail consumers." - Enterprise FMCG client, Greece (paraphrased) Most Google Ads accounts I inherit fail the same three diagnostics: broken conversion tracking, bidding to the wrong signal, and a landing page that destroys Quality Score. I rebuild Google Ads accounts from the campaign structure up - search campaigns, Google Shopping, and Performance Max each given a separate role, with first-party conversion tracking that survives iOS, GDPR consent, and cookie loss. Google Ads results come from the system - not from smart match types applied to a broken foundation. I fix the foundation before I touch the bid strategy. 𝗙𝗹𝗮𝗴𝘀𝗵𝗶𝗽 Google Ads 𝗘𝗻𝗴𝗮𝗴𝗲𝗺𝗲𝗻𝘁𝘀: 🌟 𝗠𝘂𝗹𝘁𝗶-𝘀𝘁𝗼𝗿𝗲 𝗳𝗮𝘀𝗵𝗶𝗼𝗻 (𝗚𝗿𝗲𝗲𝗰𝗲): Google Ads scaled across 𝟭𝟱 storefronts under one consolidated MCC post-replatform. ROAS held during 𝟯𝘅 spend lift. 🌟 𝗘𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲 𝗷𝗲𝘄𝗲𝗹𝗿𝘆 (𝗔𝘂𝘀𝘁𝗿𝗮𝗹𝗶𝗮): Google Ads and Google Shopping rebuild on 𝟱𝟬𝟬𝗞+ SKU catalogue. Custom labels for margin-tier bidding. Server-side conversion tracking. 🌟 𝗕𝟮𝗕 𝗱𝗮𝗶𝗿𝘆 𝗙𝗠𝗖𝗚 (𝗚𝗿𝗲𝗲𝗰𝗲): Google Ads and landing page architecture for authenticated trade-portal lead capture. B2B and B2C bidding separated from day one. 🌟 𝗖𝗮𝗿 𝗿𝗲𝗻𝘁𝗮𝗹 (𝗖𝗼𝗿𝗳𝘂): Google Ads multilingual campaigns in 𝟱 languages. Fleet grew from 𝟭𝟬 to 𝟯𝟬𝟬 vehicles. 𝟭,𝟴𝟬𝟬+ annual bookings. 🌟 𝗠𝘂𝗹𝘁𝗶-𝗹𝗮𝗻𝗴𝘂𝗮𝗴𝗲 𝗽𝘂𝗯𝗹𝗶𝘀𝗵𝗶𝗻𝗴 (𝟮𝟲 𝘀𝗶𝘁𝗲𝘀): Google Ads mirrored across 𝟮𝟲 storefronts with country and language attribution wired to GA4. 𝗪𝗵𝗮𝘁 𝗜 𝗗𝗲𝗹𝗶𝘃𝗲𝗿: 🔹 Google Ads Account 𝗥𝗲𝗯𝘂𝗶𝗹𝗱𝘀 Google Ads campaign structure aligned to margin tier and business objective. Google Shopping, Search, Performance Max, and Demand Gen each get a defined role - not stacked. A clean Google Ads account architecture earns algorithm trust from week one. Google Shopping feed engineering included as standard on ecommerce Google Ads rebuilds. 🔹 Google Ads Conversion Tracking Server-side GA4 + Google Ads conversion tagging that survives cookie loss, consent banners, and iOS restrictions. ROAS you can trust - not guessed from broken attribution. Same engineers who build the ecommerce storefront wire the Google Ads tracking. 🔹 Google Shopping 𝗙𝗲𝗲𝗱 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 Title structure, attribute coverage, Google Merchant Center health, custom labels for margin-tier bid segmentation. A clean Google Shopping product feed is 𝟯𝟬% of the Google Ads result - and most ecommerce stores have broken feeds. 🔹 Google Ads Audit + 𝗗𝗶𝗮𝗴𝗻𝗼𝘀𝘁𝗶𝗰𝘀 Every Google Ads engagement starts with a written audit covering account structure, conversion signal quality, Google Shopping feed coverage, and landing page Quality Score. No spend moved before the foundation is verified. 🔹 𝗟𝗮𝗻𝗱𝗶𝗻𝗴 𝗣𝗮𝗴𝗲 𝗖𝗥𝗢 for Google Ads Page speed, message match, and form architecture aligned to Google Ads campaign intent. Quality Score climbs, Google Ads CPCs drop, ecommerce conversion rate improves. 𝗪𝗵𝗼 𝗜 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵: 💼 I run Google Ads for ecommerce brands with monthly ad spend between 5K and 100K, where the storefront is core to revenue and paid acquisition is the growth engine. If you spend under 2K/month or need a quick keyword list, I am not the right call - I work on accounts where the architecture matters and the margin is large enough to optimise. 𝗠𝘆 𝗣𝗿𝗼𝗰𝗲𝘀𝘀: 🔄 𝟭. Week 1 Google Ads Audit - account structure, conversion tracking, Google Shopping feed, landing pages, attribution. Written diagnosis with a go / no-go. 🔄 𝟮. Week 2 Fixes - tracking and feed repaired before structural changes. No bid moves until signal is clean. 🔄 𝟯. Weeks 3-8 Google Ads Rebuild - new campaign architecture, test framework, weekly performance reviews. 🔄 𝟰. Ongoing Google Ads Management - monthly optimisation, quarterly creative and feed refresh. Ready to fix your Google Ads ROAS? Send the account spend, current ROAS, and main product categories. If Google Ads is not the right channel for your business, I will say so on the first call.