Sara Kozińska | Senior Full-Stack Developer & WordPress Expert > Senior Full-Stack Developer Building Digital Products. I build fast, clean, and scalable products: custom WordPress products, modern web apps, and cross-platform mobile apps. Available for remote B2B collaboration. VIEW WORKCONTACT ME ~/sk-developer− □ × $cat about.json { "name": "Senior Developer" "focus": ["WordPress", "Web Apps", "Mobile", "AI MVPs"] "mode": "remote B2B" "status": "available" } $ SCROLL // WHAT I DO Services 0101 WordPress Done Properly Custom builds from scratch and advanced improvements. Maintainability, performance (Core Web Vitals), and a clean editor experience. >Custom themes from Figma to production >Custom Gutenberg blocks (React + ACF PRO) >Headless WordPress, WPGraphQL >WooCommerce builds & customizations >Multisite, multilingual, migrations >Performance, troubleshooting, security >Ongoing maintenance & safe releases 0202 Full-Stack Web Apps Production-grade web apps with modern frontend and backend stacks. When the project needs more than a CMS. >React, Vue, Next.js, Nuxt, TypeScript >Node.js, PHP, Firebase backend >REST APIs, headless CMS patterns >Real-time: auth, dashboards, admin panels 0303 Mobile Apps Cross-platform mobile apps that feel native and scale well. >React Native & Flutter >Capacitor (web-to-mobile) >PWA, offline flows, push notifications >App publishing workflows 0404 AI & Rapid MVP Delivery AI-assisted workflow + real engineering. I use AI tools when they improve speed and quality, keeping the final result production-ready. >Faster iteration & UI scaffolding >Knowledge-base chat over your docs (RAG) >Search, automations & internal tools (AI agents where it helps) >Lovable, v0, Replit, AI copilots >n8n, Zapier/Make, Airtable, Bubble.io >Fast MVP in days, scalable build in weeks 05 For Agencies >Overflow support for ongoing client work >Rescue/stabilisation of WordPress projects >Performance and hard problems >Clean handover, documentation, smooth communication 06 For Direct Clients >End-to-end: discovery > build > launch > support >Clear scope and timeline >Transparent communication >Production-ready (performance, SEO, QA) CI/CDWPMLGitVercelJoomlaFigmaFlutterTailwindBubble.ioCapacitorAirtableNode.jsn8nMongoDBNext.jsMagentoHeadless CMSMakeSCSSMVPReplitGSAPSymfonyPWANuxtLaravelGutenbergPHPReact NativeWordPressVueLovableTypeScriptFirebaseAIWooCommerceWPGraphQLZapierPostgreSQLAWSDockerJavaScriptReactREST APIACF PRODrupalv0ExpressSanityPrestaShopCI/CDWPMLGitVercelJoomlaFigmaFlutterTailwindBubble.ioCapacitorAirtableNode.jsn8nMongoDBNext.jsMagentoHeadless CMSMakeSCSSMVPReplitGSAPSymfonyPWANuxtLaravelGutenbergPHPReact NativeWordPressVueLovableTypeScriptFirebaseAIWooCommerceWPGraphQLZapierPostgreSQLAWSDockerJavaScriptReactREST APIACF PRODrupalv0ExpressSanityPrestaShop Bubble.ioGutenbergMongoDBFirebasev0LovableAWSGitReactLaravelREST APIJoomlaMagentoAIAirtableMVPWPGraphQLMakePWAExpressCapacitorTypeScriptVercelHeadless CMSSanityJavaScriptACF PRODrupalCI/CDReact NativeWooCommerceGSAPTailwindFigmaDockerNext.jsZapierVueNode.jsWordPressFlutterPostgreSQLn8nSCSSPrestaShopSymfonyReplitPHPWPMLNuxtBubble.ioGutenbergMongoDBFirebasev0LovableAWSGitReactLaravelREST APIJoomlaMagentoAIAirtableMVPWPGraphQLMakePWAExpressCapacitorTypeScriptVercelHeadless CMSSanityJavaScriptACF PRODrupalCI/CDReact NativeWooCommerceGSAPTailwindFigmaDockerNext.jsZapierVueNode.jsWordPressFlutterPostgreSQLn8nSCSSPrestaShopSymfonyReplitPHPWPMLNuxt CHECK CLIENTS RECOMMENDATIONSVIEW MY CV // RECENT WORK Selected Projects A few recent builds I delivered end-to-end. Click any project for details. VIEW PROJECT 01 Custom WordPress Build Nuvra Microsite Custom WordPress build for Nuvra, designed as a multilingual and UX-focused marketing website. I implemented TranslatePress (2 languages), light/dark modes, RTL/LTR support, a custom Jobs CPT, a dynamic countdown timer, and refined GSAP-based animations to create a fast, interactive, and flexible platform. WordPressPHPJavaScriptGSAPTranslatePressRTL/LTRCustom Post TypesVite VIEW PROJECT 02 Custom WordPress Build Performa Code Website Custom WordPress website for PerformaCode, built as a modern B2B software services platform focused on embedded systems, enterprise solutions, and AI/ML engineering. I implemented a modular, content-driven structure for services, expertise, industries, projects, media/blog content, FAQ, and lead generation, with a polished responsive UI and strong performance-focused front-end delivery. WordPressPHPGutenberg BlocksACF PROGSAPCustom Post Types VIEW PROJECT 03 Custom WordPress Build Dual Diploma Program Custom WordPress website for Dual Diploma Switzerland, built as a multilingual education marketing platform. I implemented custom forms with data integrated into Google Sheets, GSAP-based animations, and a structured content experience for program information, applications, FAQ, and contact sections, with a responsive and performance-focused front-end. WordPressTypeScriptGSAPCustom FormsGoogle Sheets Integration VIEW PROJECT 04 Custom WordPress Build Community Engagement Hub (TRUST) Custom WordPress platform for the TRUST Community Engagement Hub with a structured content model for country-specific incidents and custom data visualisations driven by Google Sheets. I built scalable CPT-based content management and chart components to present incident data in a clear, accessible, and maintainable way. WordPressPHPCustom Post TypesGoogle SheetsChartsData Visualization VIEW PROJECT 05 Custom WordPress Build Welcom Cabinet Website Custom WordPress website for Welcom Cabinet, built as a lead-focused local business platform for remodeling services in South Carolina. I created a structured service-based website experience with clear CTAs, project and testimonial sections, FAQ, and contact flows, supporting a polished responsive front-end and easy content management for ongoing updates. WordPressPHPResponsive DesignLead GenerationLocal Business WebsiteService WebsiteCustom Theme VIEW PROJECT 06 Custom WordPress Build StarApple AI Custom WordPress website for StarApple AI, built as a modern B2B platform for AI, analytics, and innovation services. I created a structured, content-driven website experience for service positioning, thought leadership, and lead generation, with a responsive front-end and flexible content management for ongoing updates. WordPressPHPAI Services WebsiteLead GenerationCustom ThemeGSAPGutenberg Blocks VIEW PROJECT 07 Custom WordPress Multisite + WooCommerce The TEFL Academy Complex custom WordPress multisite build for The TEFL Academy, developed as a geolocation-driven, region-specific e-commerce platform. I worked on WooCommerce-based course sales, custom page builders and custom blocks, plus integrations with Moodle and CRM systems. The platform loads the appropriate multisite version based on user location, while maintaining a scalable content and marketing experience across regions. WordPress MultisiteWooCommercePHPCustom Page BuilderCustom BlocksMoodle IntegrationCRM IntegrationGeolocationE-commerce VIEW PROJECT 08 Custom Web App Vilo Custom full-featured web application built for internal operations and client communication. I developed Vilo in Vue.js with Firebase (Authentication, Database) and implemented modules for chat, calendar, Kanban task management, document signing, client communication, and an internal messaging system for company employees. I also used Node.js and Python for backend/support logic, with a Bootstrap-based UI framework for fast and consistent interface development. Vue.jsFirebaseAuthenticationDatabaseChatCalendarKanbanDocument SigningNode.jsPythonBootstrap // LET'S CONNECT Let's Build Something Solid. If you're an agency looking for a senior partner, or a client who needs a reliable developer, let's talk. I'll reply with next steps and a quick plan. SCHEDULE A CALLSEND EMAIL