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Full-Stack AI Developer building SaaS platforms, mobile apps, APIs, and AI-powered products. I help startups and businesses turn ideas into working software — from MVPs to production applications. My focus is full-stack development + practical AI integration. I can work across frontend, backend, databases, APIs, authentication, payments, automations, and deployment, while integrating AI where it creates real value for the product. Recently, I’ve worked on a production business-management SaaS with real users, contributing across a complex existing codebase involving CRM, project management, workflows, automations, files, permissions, payments, integrations, and AI-powered functionality. I’m comfortable joining an existing product, understanding how the system works, fixing bugs, improving architecture and performance, and building new features end-to-end. 🤖 AI & Automation • OpenAI, Claude and Gemini integrations • LLM-powered features and AI assistants • AI workflows and business automation • API integrations and data processing • AI-assisted application development 💻 Full-Stack & SaaS • React, Next.js, JavaScript & TypeScript • Node.js and PHP/Laravel • REST APIs and third-party integrations • PostgreSQL, MySQL, MongoDB, Supabase & Firebase • Authentication, roles and permissions • Stripe payments, subscriptions and webhooks • SaaS dashboards and complex business workflows 📱 Mobile Development • React Native & Expo & Flutter • Cross-platform iOS and Android applications • API-connected mobile apps • Authentication and real-time functionality ⚙️ Tools & Deployment • Git & GitHub • Docker • Vercel & Railway • Cloud infrastructure and storage • Claude Code, Cursor, ChatGPT & GitHub Copilot I also build my own products, including Wayo AI and DUFIT, which allows me to work beyond isolated development tasks and understand the complete product lifecycle — from an idea and architecture to implementation, testing and iteration. What I can help you build: • AI-powered SaaS applications • SaaS MVPs • Web and mobile applications • AI assistants and LLM integrations • REST APIs and backend systems • Business automations • Stripe subscription systems • Existing application improvements and new features • Third-party API integrations I care about understanding the product and the business problem behind it — not just completing tickets. If you need a Full-Stack AI Developer who can work across the application, integrate AI and APIs, and help turn requirements into a working product, feel free to send me a message.

I help businesses create a professional online presence using WordPress. My work focuses on developing business websites that clearly present services, improve credibility and allow potential clients to easily contact the company. Projects typically include responsive website design, WordPress implementation, contact forms, service pages and basic SEO structure. My background combines technical project experience with web development, which allows me to approach each website as a structured digital project rather than just a design task. Tools and technologies I commonly use include WordPress, Elementor, HTML5, CSS3 and SEO best practices. If you are looking for a reliable WordPress developer to build or improve your business website, feel free to contact me.

I help businesses build clean, fast, and high-converting websites using WordPress, Shopify, and Webflow. I’m a web designer and developer with more than 10 years of experience, working on business websites, eCommerce stores, and landing pages. I focus on creating websites that are simple, well structured, and easy to use. For me, it’s not only about design — it’s also about how the user moves on the page and how we can improve results. I have worked on many projects from design to development, and also improving existing websites. I’m comfortable starting from scratch or working on already built sites. I like to keep things clean and organized, so the final website is not heavy, loads fast, and is easy to manage from backend. If you need someone reliable who can handle both design and development, I’ll be happy to help.

When you hire me, you get one senior expert running your entire retention marketing: strategy, execution, and results...No juniors. No handoffs. Just 20+ years of experience working directly for your brand. --- 🏆 Expert-vetted ✅ 100% Job Success Score ⭐ 4.7/5 stars across 98 reviews 📁 150+ projects completed ⏱️ 4,500+ hours on Upwork --- I'm Elcin, a Klaviyo-specialist and retention marketer with an MBA and over two decades of hands-on experience helping DTC and e-commerce brands turn email and SMS into their most profitable channel. Here's what my clients say, over and over: “Working with Elcin has been an absolute pleasure. From the very beginning, she demonstrated a deep understanding of our company's needs and goals. Her expertise with Klaviyo, in particular, was truly impressive. She was able to leverage the tool in creative ways to help us achieve our growth objectives. Throughout our engagement, Elcin was proactive, responsive, and communicative. She provided regular updates on our campaigns, and was always open to feedback and suggestions. What really stood out to me was her ability to think strategically about email marketing. She helped us develop a comprehensive email strategy that aligned with our broader marketing goals. Perhaps most importantly, Elcin delivered results. Thanks to her work, our email campaigns saw significant increases in engagement and revenue. She was able to identify opportunities for optimization and testing, and was constantly iterating on our campaigns to improve performance. Overall, I would highly recommend Elcin to anyone looking for an expert in email marketing, and specifically in the use of Klaviyo. She is a true professional, a pleasure to work with, and will undoubtedly help you achieve your marketing goals. Thank you, Elcin, for your outstanding work!” “Working with Elcin was a great experience. She always came with a great attitude and was always confident in giving strategic advice. She demonstrated great Klaviyo expertise and was always open to feedback and collaboration!” “Thank you for your very useful insights and help Elcin! Looking forward to keep working together in the future!” “Elcin is a pleasure to work with! Dependable, meets deadlines, and is a kind, diligent, fun collaborator. I highly recommend working with her! “Elcin is a professional who brought a wealth of knowledge and expertise to our project. We had a quick initial call to understand what both parties had to do to make this project a success. She took the time to understand our specific needs and goals. She kept us updated throughout the project, promptly addressed any questions or concerns, accepted feedback, and offered valuable insights and suggestions to improve the overall functionality of our funnel. Thank you, Elcin, for your work and dedication to our project!” “We love the work with Elcin, she's very organized, a great communicator and with a lot of experience and knowledge. Off we go to the next project with her.” That's the standard I hold myself to, every single project. --- What I Do For You - Klaviyo Strategy, Setup & Full Account Management: From scratch or taking over an existing account - Core Email Flows: Welcome flow, abandoned cart/checkout, browse abandonment, post-purchase, win-back, sunset flows and more - SMS Marketing: Strategy and execution via Klaviyo, Omnisend...SMS, Attentive, and Postscript - List growth & segmentation: Pop-up optimization, audience segmentation, deliverability care - Monthly Campaign Management: Content calendars, copywriting, A/B testing - ESP Migrations: Moving your brand to Klaviyo from Mailchimp, ActiveCampaign, Omnisend, and others - Performance Audits: Deep-dive into what's working, what's broken, and what to do next - Go above and beyond to get you the retention revenue you're dreamt of --- Results My Clients See: - Email & SMS generating 40%+ of total store revenue consistently - Open rates well above industry benchmarks across multiple industries - Automated flows recovering significant monthly revenue from what used to be lost sales - Cleaner, healthier lists with better deliverability and lower unsubscribe rates - A single point of contact who knows your brand inside out, from day one --- Who I Work Best With: I specialize in DTC and eCommerce brands on Shopify from founders scaling email for the first time to 7-8 figure brands that need a senior strategist to take full ownership of their retention channel. I also partner with mid-size teams as a "fractional email marketing director". If you want someone to set it, forget it, and hope for the best, I'm not the right fit. If you want someone who treats your brand's revenue like it's personal, let's talk. --- Platforms & Tools: Klaviyo Omnisend Shopify Meta Ads Google Ads Attentive Postscript WooCommerce ActiveCampaign Mailchimp