Hire the Best Payment Processing Specialists in Kharkiv, UA

I'm Paul — a WooCommerce engineer and technical architect. I scaled a health startup from $0 to $80M in annual revenue, maintain WooCommerce platforms doing $2M+/month, and helped one store grow revenue 60% in a single year. Over 10+ years I've learned that growth is usually a technical problem in disguise — the store that can't scale is almost always held back by infrastructure that was never built to. Most of my clients aren't looking for a freelancer to knock out a task. They need someone who can see the whole picture — the architecture, the integrations, the team, the roadmap — and make good decisions across all of it. That's the role I step into: a technical partner accountable for outcomes, not just tickets. WooCommerce is usually where the conversation starts. Custom checkout flows, subscription systems, complex pricing logic, and performance that holds under load are table stakes for me. The higher-leverage work is usually the layer underneath: internal tools, automation pipelines, bespoke business logic, and custom engineering that doesn't fit into a plugin. What I actually work on: — WooCommerce architecture, custom plugin development, and platform builds well beyond off-the-shelf solutions. For high-traffic stores, the right call is sometimes moving critical logic — inventory, pricing, order processing — out of WordPress entirely and into dedicated NestJS microservices. WooCommerce stays the storefront; the heavy lifting happens elsewhere. — Performance engineering: not just PageSpeed scores, but the database queries, caching strategy, and infrastructure decisions that keep a platform fast and resilient at scale — the difference between a store that converts and one that buckles on its biggest day. — Internal systems and business automation: tools your team actually uses, workflows that remove manual overhead, integrations that connect your stack. — Technical leadership: stepping in as a de facto CTO or architect, leading dev teams, reviewing code, and keeping complex projects on track. — AI-powered features where they add real leverage — built into the product where it genuinely moves the needle, not as a buzzword. A recent example: a venture-backed infrastructure company — one running a large real-time network of thousands of connected devices across North America — came to me because, for all their scale and funding, they hadn't found a team that could reliably own their server infrastructure. I stabilized their platform under sustained real-time load (100+ concurrent users) where it had been faltering, so the operation kept running instead of buckling as they grew. That's the pattern in most of my work: the business is ready to scale, and the infrastructure is what's holding it back. My stack: PHP, JavaScript, React, Node.js, NestJS, and the full WooCommerce/WordPress ecosystem — plus whatever the problem actually calls for. I work with a small number of clients at a time. If you're building something that needs to last, and you want a technical partner who's done this before at scale — let's talk.

🟪◾I will take care of all your concerns related to website creation◾🟪 .Business card, corporate website, online store, landing page (one-page website), information portal, social network, blog, portfolio none of these areas will be just pretty pictures — any brand concept will undergo detailed analysis, clear goals will be defined➡️design/redesign in Figma ➡️adaptation for mobile and other devices➡️transferring the site to Shopify|Wix|Wordpress|Redymag ➡️connecting all services and programs ➡️connecting SEO and all necessary applications, as well as complete instructions and support for the further use of your site. ◾Tell me about your business, and I will show users that you are the best in your field🟪 ⏬Click on the “𝐈𝐧𝐯𝐢𝐭𝐞 𝐭𝐨 𝐉𝐨𝐛” button, and I will turn your idea into a space that will work for you and bring you customers. 🟪 My skills🟪: ◾Shopify E-commerce Solutions, Shopify Digital Storefront, Shopify Website Customization, Shopify Theme Customization, Shopify Plugin Development, Shopify Plus Features, Shopify Payment Solutions, Shopify API Integration, Shopify App Marketplace, Shopify SEO Services, Shopify Platform Integration, Shopify Payment Gateways, Shopify Store Migration Services, Shopify Liquid Template Language, Shopify API Solutions, Shopify Store Design Services, Shopify Development Services, Shopify Store Optimization Services, Shopify Multi-Channel Integration, Shopify Mobile Solutions, Shopify Store Setup Services, Shopify Product Management Tools, Shopify Website Performance, Shopify Shipping Solutions, Shopify Social Media Integration, Shopify Dropshipping Solutions, Shopify Checkout Process Optimization, Shopify Abandoned Cart Solutions, Shopify Order Management System, Shopify Speed Optimization, Shopify Theme Design Services, Shopify Mobile Optimization Services, Shopify Store Performance Optimization, Shopify Wholesale Solutions, Shopify Payment Integration Solutions, Shopify Payment Processing Services, Shopify International Market Integration, Shopify Localization Services, Shopify Multi-Currency Solutions, Shopify Store Upgrade Services, Shopify Store Redesign, Custom Shopify Themes, Custom Shopify Development Services, Shopify Store Development,Figma web designer, website design, web designer, figma expert, landing page design, responsive web design, figma to html, css, ui design, ui/ux design, ui designer, ux designer, ui/ux designer, website designer, website design, web design, mobile design, UX/UI designer, website designer, UX/UI expert for corporate websites, Professional UX/UI services, Creative UI/UX design, Responsive web design, User-centered design expert, Custom web design, Website redesign specialist, Start-up web designer, UX/UI landing page designer, figma web designLanding page design expert, Custom landing page design, High-conversion landing page design, Landing page UI/UX designer, Professional landing page web designer, User-friendly landing page design, Creative landing page designer, Responsive landing page figma design, Modern landing page design, UI website designer.

𝑴𝒐𝒔𝒕 𝒂𝒑𝒑𝒔 𝒈𝒆𝒕 𝒃𝒖𝒊𝒍𝒕. 𝑭𝒆𝒘 𝒈𝒆𝒕 𝒇𝒆𝒍𝒕. The difference is in the details nobody notices until they're missing. As a lead iOS Developer, I help fast-growing startups and enterprises ship faster, cutting time-to-market by 40% while keeping app stability at 99.9%. Complex requirements become clean, scalable products that hold up under real-world pressure and real-world users. When you hire an iOS Developer, you need more than just code; you need a partner who understands the business impact of a smooth user journey. As a dedicated App developer, I have spent years mastering Swift to craft seamless experiences that users love. Whether we are building a greenfield project or optimizing legacy systems, my work as an iOS Developer ensures your application stands out in a crowded App Store. My approach to Mobile App Development is rooted in precision. As an experienced iOS Developer, I treat every project as a strategic investment. I leverage Swift to build modular, maintainable architectures that allow for rapid iteration. Many clients come to me after struggling with technical debt, and as a seasoned App developer, I excel at identifying bottlenecks. Using Apple Xcode and advanced debugging techniques, I ensure that every Swift implementation is optimized for performance. An iOS Developer must also be a great communicator, and as a professional App developer, I bridge the gap between technical constraints and business goals. I do not work in a silo. Often, I collaborate with an android developer or a flutter developer to ensure feature parity across platforms. Having deep knowledge of iOS Development combined with an understanding of Android App Development allows me to architect robust cross-platform strategies. Even when working strictly on an iOS build, I maintain awareness of the broader ecosystem. My expertise in API Integration and Firebase ensures that your Mobile App remains connected and reliable. Whether you need a complex Hybrid App Development solution or a high-end native experience, my background as an iOS Developer and App developer using Swift covers all bases. I have seen projects fail due to poor planning, which is why my process includes deep analysis of Mobile App Design and Mobile App Redesign cycles. I have mentored teams on Objective-C to Swift migrations and have successfully integrated React Native components where speed is critical. As an App developer who understands the full lifecycle, I have worked alongside a web developer and a full stack developer to ensure end-to-end data integrity. From Kotlin workflows for your secondary platforms to native iOS performance tuning, I bring a holistic view to every task. Why choose me? Because I provide more than just syntax; I provide security and scalability. My history as an iOS Developer includes fixing critical production issues that saved companies thousands in churn. When I write Swift, I prioritize readability and security. As an App developer, I use Firebase for real-time data and implement complex logic that makes your app feel like magic. My experience with Mobile App Bug Fix tasks is extensive I treat these as opportunities to stabilize and grow. I also understand the aesthetic side. While I am an iOS Developer at heart, I collaborate closely with any graphic designer to ensure that the final Mobile App interface is pixel-perfect. If you need a software developer who understands the nuances of the App Store submission process, you have found the right person. I have published over 50 apps, ensuring every Swift build meets the highest standards. If you are looking for a professional iOS Developer who treats your business like his own, let’s talk. I am an App developer who believes that code should be beautiful, but the business result must be profitable. Whether you are transitioning from Objective-C to Swift, or launching a new project that requires expert Mobile App Development, my commitment is to deliver quality, speed, and reliability. As your next iOS Developer, I am ready to help you dominate the market. Let's build something exceptional using the power of Swift and modern Mobile App technologies. Reach out today to see how my work as an App developer can scale your vision.

With 10+ years building Java backend systems, I deliver production-ready software end-to-end — from API design and domain logic to the pipeline and environment it runs on. Most senior Java engineers hand off deployment to someone else. I don't. When there's no DevOps engineer on the team, I cover that ground myself — setting up CI/CD pipelines, containerizing services, configuring cloud environments, and making sure what I build actually runs reliably in production. You get one engineer who takes full ownership of delivery, not a gap between dev and ops that someone else has to fill. I also integrate AI-assisted development tools into my workflow to move faster and keep costs down for clients. I work with my preferred toolset by default, but if your team has privacy or data security requirements, I'm happy to work within your approved tools or constraints — no friction. Clients typically come to me with: ✅Backend systems that need to be built right from the start — clean design, solid APIs, room to scale ✅Legacy Java codebases that need modernizing without breaking what works ✅Microservices that need to be decomposed, redesigned, or made deployable ✅Teams without a dedicated DevOps engineer who still need a proper delivery setup I work across the full backend lifecycle: design, build, containerize, automate, ship, and monitor. ➤ Backend Engineering ✅Spring Boot & Spring Cloud microservices ✅REST & GraphQL API design ✅Event-driven systems (RabbitMQ and similar) ✅Database design & optimization (SQL & NoSQL) ✅System design for scalability and maintainability ➤ Delivery & DevOps — when the team needs it ✅CI/CD pipelines (GitHub Actions, GitLab CI, Jenkins) ✅Docker & Kubernetes — containerization and orchestration ✅Infrastructure as Code (Terraform) ✅AWS & Azure — environments that support your full SDLC ✅Monitoring & observability (Prometheus, Grafana, ELK) ➤ What I Deliver ✅Well-structured backend systems your team can extend without pain ✅APIs designed for clarity, consistency, and long-term maintainability ✅Deployable, containerized services — not "works on my machine" software ✅Automated pipelines and stable environments when there's no DevOps engineer to own them ✅Production setups that are observable, cost-aware, and right-sized for your stage ✅Faster delivery and lower effort costs through AI-assisted development — with full respect for your data privacy preferences ➤ Working Style ✅I take full ownership — design decisions, delivery, and outcomes ✅Honest scope estimates, no surprises mid-project ✅I document what I build, so your team isn't dependent on me ✅Strong async collaboration across US, EU, and other time zones ➤ Industries ✅SaaS platforms & product companies ✅Startups and scale-ups ✅Enterprise engineering teams If you need a senior Java engineer who won't stop at writing code — someone who can take a feature from design to production without handing off to a specialist — let's talk. Message me and I'll review your current setup or requirements and tell you honestly what I can deliver and how. 🔑 Keywords Java, Spring Boot, Spring Cloud, Microservices, REST API, gRPC, RabbitMQ, Backend Developer, API Design, System Design, AWS, Azure, Kubernetes, Docker, Helm, Terraform, CI/CD, Bitbucket, Jenkins, Infrastructure as Code, Monitoring, Prometheus, Grafana, ELK Stack, Observability, Database Design, MySQL, MongoDB, SaaS Backend, Cloud Automation, SDLC, AI-Assisted Development, Productivity, Senior Java Developer

I help businesses streamline operations, eliminate repetitive tasks, and integrate apps seamlessly using Make.com, n8n, Zapier, and API automation. How I Can Help: ✅ Eliminate manual work – Automate data entry, reports, emails & more. ✅ Seamless app connections – Sync CRMs, e-commerce, and marketing tools. ✅ Advanced API integrations – Connect any platform for smooth data flow. ✅ AI-powered automation – Make smarter, data-driven decisions. Tools I Work With: 🔹 Automation Platforms – Make.com, n8n, Zapier 🔹 AI & Chatbots – OpenAI, Google AI, Telegram Bot 🔹 Marketing Automation – Klaviyo, Mailchimp, ActiveCampaign 🔹 CRM – HubSpot, Pipedrive, Airtable 🔹 E-commerce & Payment – Shopify, WooCommerce, Stripe, PayPal My Process: 1️⃣ Discovery – Identify pain points & automation goals. 2️⃣ Setup & Customization – Build tailored automation solutions. 3️⃣ Testing & Optimization – Ensure flawless execution. 4️⃣ Support & Guidance – Provide clear instructions for smooth use. Let’s transform your workflow into a fully automated system and help your business scale! 🔑 Keywords: automation, Make.com, integromat, Zapier, n8n, workflow automation, API integration, business process automation, email automation, AI, chatbot, CRM, Airtable, Telegram bot, OpenAI, Notion, GoHighLevel, ClickUp, GoogleSheets, ActiveCampaign, Klaviyo, MailChimp.