Hire the Best Payment Gateway Integration Specialists in Yerevan, AM

I am a Shopify Specialist with a solid background in administrative support and project coordination from my time working at the Ministry of Education of Armenia. My experience managing official documentation, coordinating workflows, and ensuring accurate communication has given me the organizational skills needed to assist businesses with their Shopify stores and e-commerce operations. Here’s what I can do for you: ✔️ Shopify Store Setup and Customization ✔️ Product Listings, Payment Gateway Integration, and App Installation ✔️ Administrative Support and Document Management ✔️ Content Updates and QA Testing ✔️ Customer Support and Order Management During my career at the Ministry of Education, I managed complex administrative tasks that required attention to detail and efficient time management. I now apply those same skills to helping businesses optimize their Shopify stores and deliver excellent customer experiences. 🌟 As a new freelancer on Upwork, I’m eager to build my reputation and offer my services at a lower rate while doing so. This is the perfect time to work with me and benefit from top-quality services at an affordable price.

"He reduced our API response time by 80%" — SaaS founder after Laravel optimization Senior Laravel developer who transforms complex business ideas into profitable, scalable platforms. With 300+ completed projects and $1M+ in delivered value, I specialize in the challenging stuff that makes or breaks businesses. What I actually deliver: - Multi-tenant SaaS platforms serving thousands of users - AI-powered Laravel applications with ChatGPT integration - Performance optimization delivering 3-5x speed improvements - "Unfixable" Laravel rescue projects brought back to life - Enterprise APIs processing millions of requests daily Recent client wins: → Scaled startup's Laravel app from 100 to 10,000+ concurrent users → Reduced server costs by 60% through database optimization → Built SaaS platform generating $50K+ monthly recurring revenue → Migrated legacy system to modern Laravel 11 architecture My TALL Stack expertise: Laravel 11 (any version) • Livewire 3 • Alpine.js • Tailwind CSS • Filament Admin • Vue.js • Inertia.js • Laravel Nova • Sanctum API • Laravel Octane • Docker deployment Why clients choose me over other developers: ✓ 9+ years preventing costly mistakes that doom projects ✓ Senior-level delivery speed (days vs weeks for complex features) ✓ Long-term partnership approach (not disappearing after launch) ✓ Proven at enterprise scale with Fortune 500 clients ✓ 100% Job Success Score with zero failed projects Perfect for: - SaaS founders needing scalable Laravel architecture - CTOs requiring performance optimization expertise - Agencies seeking reliable Laravel development partner - Startups wanting enterprise-grade technical foundation Next steps: Send me your Laravel challenge with current pain points. I'll review your requirements and provide a clear roadmap with realistic timelines and guaranteed outcomes. Available for complex builds, rescue projects, and long-term partnerships.

I build payment systems and the AI agents that run on top of them. I am a senior backend engineer with 9+ years in Java and Spring Boot, including 4+ years on the billing and payments platform behind a marketplace moving about $4B a year. PAYMENTS AND FINTECH I deliver provider integrations end to end: Adyen, Braintree, Payoneer, PayPal, Venmo, Wise, Wells Fargo, Bank of America and Forter, on a platform operating across 180+ countries. My work covers card processing, wallets, payouts, bank transfers, fraud screening and reconciliation over REST, SFTP and webhooks. I have also integrated Stripe, FastSpring and bank vPOS in client products. Representative work: - Migrated a major payout provider from a legacy protocol to REST with OAuth 2.0. The migration covered payouts, mass payouts, payee registration, card release and reconciliation. I shipped it to 100% behind feature flags with no customer-facing incidents. I built provider emulators to test it without vendor sandboxes. - Designed a card-processing service on a provider's GraphQL API covering client tokens, payment methods, network tokens, cryptograms, authorization, capture, refunds, cancellations and 3D Secure. - Built a forwarding layer that routes network tokens between two providers, enabling non-US card acceptance. I rolled it out in stages and negotiated timeout SLAs directly with the vendor. - Authored the design for splitting a payments monolith into nine provider-specific microservices. Domain coverage: 3DS2, network tokenization, cryptograms, authorization and capture, refunds, chargebacks, reconciliation through APIs, webhooks and SFTP files, idempotency and double-charge prevention, mass payouts, ACH returns, fraud screening, PCI-aware design. AI AGENTS AND LLM SYSTEMS I build AI that runs inside products with real users and revenue. I built an agentic system that investigates failed payment transactions on its own, reasoning across logs, dashboards, source code and incident tooling to cut manual triage. I built it with Python, LangChain and multi-agent orchestration. It runs in a high-stakes payments environment, where being wrong has a cost. I also built and run Memabooks, a profitable AI commerce product that turns a child's photo into a personalized illustrated storybook. Over 10,000 books created so far, printed on demand and shipped worldwide, with customers in eight countries. I developed a multi-stage, identity-preserving image generation pipeline covering face detection, background removal, personalized character generation, skin-tone matching and character consistency across a complete book. I work with diffusion models, fine-tuned LoRA adapters and serverless GPU inference, tuning for quality, latency and cost. I also built the Node/NestJS backend, the Angular front end, print-on-demand fulfilment, and the payment stack for a market with limited access to major global processors: bank vPOS, 3DS2, Apple Pay, idempotency and double-charge prevention, and abandoned-payment recovery. AI stack: LangChain, LangGraph, LlamaIndex, multi-agent systems, RAG and multimodal RAG, vector databases (FAISS, Chroma), Model Context Protocol, OpenAI, Gemini, Azure AI. BACKEND ENGINEERING AND RANGE My core stack is Java 17 and Spring Boot. I also have production experience with Node.js, NestJS, TypeScript, Python, PostgreSQL, MongoDB, AWS, Docker, Kubernetes, REST, GraphQL, microservices and event-driven architecture. I was the sole engineer responsible for Geoapify's product surface for 17 months, working directly with the product owner across 14 repositories. I built a geocoding SaaS end to end, covering file upload, worker-based job processing, object storage and card payments. I maintained their public TypeScript SDKs for MapLibre GL, Leaflet and GeoJSON, which see about 55K npm downloads a month, and owned their public API playgrounds and OpenAPI specs. Testing is part of my delivery process. On one project, I built 260 Playwright end-to-end tests from scratch in about six days. WHAT I CAN HELP WITH - Payment provider and fintech integrations - Java and Spring Boot backend development - Backend architecture and monolith-to-microservices migrations - AI agents, RAG and LLM integration - API design, reliability, observability and production troubleshooting CREDENTIALS - Oracle Certified Professional: Java SE 11 Developer - IBM RAG and Agentic AI Professional Certificate - Google Cloud Generative AI Leader - Microsoft Azure AI Fundamentals - BSc in Computer Science, American University of Armenia - Former Java lecturer, Russian-Armenian University My longest engagement here ran 19 months and 2,700+ hours. I am open to long-term, full-time and contract-to-hire engagements. Tell me what you need built or what is currently breaking. I will tell you honestly whether I am the right engineer for it.

I’m a Senior WordPress & WooCommerce Developer with 10+ years on Upwork helping businesses fix the problems other developers can’t solve. I specialize in: • Custom WooCommerce plugins, extensions & add-ons • Payment gateway integration (PayFast, Stripe, PayPal, custom APIs) • Subscription logic & renewal issues • Eliminating duplicated orders / duplicated renewals • Checkout errors, race conditions, AJAX conflicts • Custom API integrations (ERP, CRM, shipping, invoicing) • Theme & child-theme development • Performance optimization & debugging • Advanced WooCommerce hooks & filters • Fixing plugin conflicts and broken functionality What Makes Me Different Most developers use WooCommerce. I understand how it works internally: • Action priorities • WC_Subscriptions internals • Cron conflicts • Payment callback issues • Data validation + lifecycle hooks • Template override logic • Script localization + AJAX flows This means I can diagnose and fix complex issues faster and more reliably. Custom Development (My Core Strength) I develop: • Custom WooCommerce plugins • Extensions for existing plugins • Add-ons for WooCommerce Subscriptions, Appointments, Bookings • Custom checkout flows • Webhooks & REST API integrations • Admin tools, dashboards, automation scripts Emergency Fix Specialist If your WooCommerce store is experiencing: • Duplicate orders • Broken renewals • Payment “Amount Mismatch” errors • API callbacks not firing • Emails not triggering • Checkout freezing • Plugin conflicts …I can fix it quickly and explain what caused the issue so it won’t happen again. Why Clients Hire Me • 9+ years experience • Top Rated • Clean, maintainable code • Fast communication • Clear explanations • Reliable long-term support Let’s Work Whether you need a fast fix or a custom solution built from scratch, I’m ready to help. Send me a message and tell me what’s broken — I’ll take a look right away.