Senior software engineer with 11 years of experience focused on the development of cross-platform iOS / Android applications using React Native, able to deal with full-cycle projects from rapid prototyping to delivering to stores. I've got in-depth knowledge of React Native ecosystem so I will help to pick up the right libraries/tools stack for a project and bring a solid foundation to it from day zero. Having a web background, I may also help to design the right architecture for web + mobile type of projects with a shared codebase. My guidelines: - keen to create clean, modular and testable code with low-coupling / high-cohesion; - focus on the business value I can add to the project rather than just writing code; - keep the list of used technologies short to make sure I'm an expert in all of them; Skills: - TypeScript to make codebase solid / predictable / maintainable; - React Query for server data fetching and Redux / MobX as client-side state containers; - Firebase for real-time DB, authentication, push notifications, cloud functions, analytics, etc. - Hasura / Apollo Server + Prisma to build GraphQL server API backed up by PostgreSQL - NextJS + Tailwind for blazing fast web apps with continuous deployment to Vercel - Expo SDK / tools for rapid prototyping; - React Navigation as navigation solution; - Reanimated / React Native Gesture Handler for juicy animations/interactions; - StoryBook to maintain and test applications’ UI library/design system; - Jest / Detox / Cypress for unit and e2e testing; - Fastlane / BitRise for building CI / CD pipelines for multiple environments; - Sentry for monitoring / analysing production bugs; - Flipper / Reactotron for debugging on both real devices/simulators; - Eslint / Prettier / Husky / Lint-staged for maintaining code health; Fluent in agile methodologies and used the above tools and services: GitHub / GitLab / Asana / BaseCamp / Jira / Trello / Slack / Notion / Zeplin / Invision / Figma

Développeur full stack & Analyste cybersecurity avec plus de 6 ans d'expérience. Mordu d'informatique, j'ai appris à coder dès mon plus jeune âge dans divers langages (JavaScript, PHP, Angular, React, Windev) et j'ai créé des projets personnels. Polyvalent, je maîtrise les différentes étapes techniques de la création d'un site ou d'une application web : compréhension des besoins utilisateurs, développement frontend/backend, maintenance et la sécurité des applications.

Most Google Ads problems aren’t actually Google Ads problems. You’ve probably hired someone to “fix” your campaigns before. They restructured ad groups, adjusted bids, rewrote some copy, and results barely moved. That’s because the ads were never the real issue. The research, the landing experience, the offer, the tracking, that’s where conversions are won or lost. Ads just drive the traffic. I fix the whole system. I’m Sean, Founder of WordFunnel and former Director of Paid Search at Fat Earth Media, where I built the paid search division from zero and helped lift client retention by 50%. Over 10+ years, I’ve managed $15M+ across Google, Microsoft, and Meta Ads, but what actually moves numbers is the work around the ads: research-driven strategy, high-converting landing pages, clean tracking, and disciplined optimization. Here’s how I’m different from most Google Ads freelancers: • I start with research. Competitor analysis, ICP definition, messaging and offer alignment, before a single ad is written. • I build landing pages that convert. Strategy-informed pages designed around your audience, not generic templates. • I build campaigns engineered for low CPC. Tight structure, precise targeting, and strong relevance scores, made possible because steps 1 and 2 are already done right. • I set up real tracking. GA4, GTM, conversion events, call tracking, so you know exactly what’s working and what isn’t. • I optimize from evidence. Dashboards, QA systems, and testing frameworks that turn data into decisions. I also bring analytics and automation depth that most media buyers don’t: SQL, Python, BigQuery, Looker Studio, Tableau, and Power BI. Decisions are based on evidence, not gut feel. Beyond ads, I work across the full revenue engine when needed: • SEO and organic growth systems (technical audits, content strategy, AEO) • Lifecycle and retention (email/SMS flows, segmentation, LTV optimization) • Reputation and trust (review pipelines, proof assets, conversion-focused trust pages) • Sales automation (CRM design, lead routing, Zapier/n8n/Make workflows, executive dashboards) Best fit: B2B services or ecommerce teams doing $1M+ who want measurable growth, clean tracking, and a system that actually compounds. My working style: 1. Diagnose: I audit the numbers, the funnel, and the tracking until the real constraint is clear. 2. Rebuild the foundation: research, landing pages, account structure, tracking, and budget alignment. 3. Scale with controlled tests: consistent experimentation, clean reporting, and disciplined iteration. Tell me your goal (profit, leads, CAC, ROAS) and what you’ve tried. I’ll tell you what I’d fix first and why. Message me with your site, your primary KPI, and your current monthly ad spend, I’ll suggest the fastest path to improvement.

“I’m a developer with experience in building websites for small and medium sized businesses. Whether you’re trying to win work, list your services or even create a whole online store – I can help! 1.I’m experienced in HTML and CSS 3, PHP, jQuery, Word Press and SEO 2.I’ll fully project manage your brief from start to finish 3.Regular communication is really important to me, so let’s keep in touch!” 4.Experienced Flutter App Developer: A skilled Flutter app developer with a proven track record of creating high-performance, feature-rich mobile applications. Proficient in Dart programming language and well-versed in utilizing Flutter's UI toolkit for building visually appealing and responsive cross-platform apps. 5.Innovative Mobile Solutions: A creative Flutter app developer dedicated to crafting innovative and user-friendly mobile solutions. Capable of translating conceptual ideas into practical and aesthetically pleasing applications, ensuring a seamless user experience across various devices and platforms. 6.Cross-Platform Expertise: A cross-platform specialist proficient in leveraging Flutter's capabilities to develop applications that run seamlessly on both Android and iOS devices. Demonstrated expertise in optimizing code for performance and ensuring consistent functionality across different operating systems. 7.Collaborative Team Player: An effective team player who collaborates with designers, product managers, and other stakeholders to understand project requirements and deliver applications that meet or exceed expectations. Strong communication skills to facilitate smooth collaboration throughout the development process. 8.Up-to-Date with Flutter Trends: A dedicated Flutter app developer who stays abreast of the latest industry trends and Flutter updates. Continuously explores new features and functionalities offered by Flutter to implement cutting-edge solutions, ensuring that developed applications align with the latest mobile development standards.

I specialize in fixing difficult Unreal Engine and Unity problems for studios that need senior-level help fast. My strongest areas are: • Unreal Engine C++ / Blueprints • multiplayer replication and dedicated servers • VR and simulation applications • gameplay systems • performance optimization • graphics, shaders and real-time 3D pipelines • technical prototypes and vertical slices I have 12+ years of experience in game development, real-time 3D, simulation and training software, including defense/industrial projects and commercial game work. I am not the cheapest developer on Upwork, and I am not trying to be. I am a good fit when you need someone who can enter an existing project, understand the technical mess quickly, and solve the problem properly. Good projects for me: • “Our Unreal multiplayer system has replication/server problems.” • “We need a UE5 or Unity VR/simulation prototype.” • “Our project has performance or rendering issues.” • “We need a senior dev to build a vertical slice.” • “We have a broken feature and need someone to debug it fast.” For small tasks, I prefer clear fixed-scope work. For larger projects, I can work hourly or milestone-based.

I’m a professional Mobile App Developer who specializes in building applications that combine clean design, flawless functionality, and future-ready technology. My expertise covers iOS, Android, and cross-platform solutions, giving businesses the flexibility to reach users wherever they are.

I am an iOS Engineer with 6 years of experience designing and developing high-performance applications. My expertise spans multiple areas, from creating intuitive mobile interfaces to implementing complex algorithms in machine learning. I have successfully contributed to projects across various sectors, including finance and insurance, enhancing user experiences and driving engagement. I specialize in developing scalable and efficient iOS applications, leveraging the latest technologies to deliver top-notch solutions. Whether working on new features or optimizing existing functionality, I thrive on challenges and bring innovative ideas to the table. If you are looking for a skilled iOS developer who understands both technical requirements and user needs, I would love to discuss how I can contribute to your project. Let's connect to explore the possibilities!

I design complex digital products that turn messy systems into clear, scalable user experiences. 7+ years across AI, SaaS, B2B, fintech, and mobile. Built an AI B2B assistant from scratch with shipped MVPs and ~20% conversion growth. Currently leading UX for an AI observability platform with dashboards, metrics, and data-heavy workflows. 𝗪𝗵𝗮𝘁 𝗜 𝗱𝗼 𝗯𝗲𝘀𝘁 🚀 • SaaS dashboards and admin systems • AI and data-driven product UX • Onboarding and activation flows • Role-based systems, subscriptions, billing logic • Mobile apps for iOS and Android • Scalable design systems 𝗛𝗼𝘄 𝗜 𝘄𝗼𝗿𝗸 🧠 I think in systems, not isolated screens. I map user journeys, edge cases, and interaction logic before moving to UI polish. I design with engineering constraints in mind so implementation is smooth and predictable. 𝗪𝗵𝗮𝘁 𝘆𝗼𝘂 𝗴𝗲𝘁 📦 • Dev-ready Figma files with structured components and tokens • Clear state coverage loading, empty, error, permissions • Clean handoff with interaction notes • Product-level thinking aligned with business goals 𝗥𝗲𝗰𝗲𝗻𝘁 𝗶𝗺𝗽𝗮𝗰𝘁 📊 • AI B2B assistant from zero to MVP with measurable client adoption • ~20% improvement in conversion through UX and flow optimization • Complex SaaS dashboards with advanced filtering and comparison logic 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗮𝗰𝗿𝗼𝘀𝘀 🌍 AI SaaS and B2B Fintech EdTech E-commerce Enterprise internal tools Web and mobile applications If you need a product designer who delivers structured, build-ready UX, feel free to reach out. 📩 𝙞𝙫𝙖𝙣.𝙩𝙨𝙯𝙞𝙖𝙣.𝙙𝙚𝙨𝙞𝙜𝙣@𝙜𝙢𝙖𝙞𝙡.𝙘𝙤𝙢

PROFESSIONAL SUMMARY Senior React Native Developer with 5.5+ years building high-performance, cross-platform Android and iOS applications using React Native, JavaScript, TypeScript, and Redux. Proven track record in REST API architecture, JWT/RBAC security, Firebase, and Razorpay/Stripe payment integration, shipping products for Healthcare, EdTech, and E-commerce serving 100,000+ active users. Experienced in leading full-cycle mobile development, mentoring developers, and Agile/Scrum delivery.

Fullstack Mobile Developer with 15+ years of hands-on experience across Android and iOS. At Tutti.ch (1M–5M users), I led both engineering guilds as Tech Lead and drove large-scale modernization of legacy codebases, including modularization and migration to Jetpack Compose and SwiftUI. Focused on platform architecture, CI/CD, and delivering high stability through complex production migrations. I love synthesizers.