Hire the Best Payment Processing Specialists
in Azerbaijan

I help organizations design and engineer high-stakes backend ecosystems where absolute financial reliability, data integrity, and complex integration logic are non-negotiable. If your project involves high-volume transaction processing, mission-critical ERP synchronizations, or enterprise-level financial compliance, I architect resilient backend systems built for long-term stability—completely eliminating the operational risks of fragile, "quick-fix" development. With 15+ years of experience in system architecture, I don't just write code; I design the technical blueprints for enterprise-grade, production-ready solutions. I focus on bridging the gap between core business infrastructure and global payment gateways, ensuring your platform is a highly optimized asset rather than a liability of technical debt. Core Architectural Expertise 1. Enterprise Payment Engineering & Security Expertise in architecting high-reliability checkout flows, custom billing layers, and bespoke subscription engines. I specialize in complex financial logic: multi-provider configurations (e.g., Cybersource, Stripe, Adyen), 3DS2 authentication protocols, secure tokenization, and strict PCI-DSS compliance awareness to mitigate risk at the architectural level. 2. Fault-Tolerant ERP & Middleware Architecture Building bulletproof, asynchronous integration bridges between enterprise platforms (such as Oracle NetSuite, Salesforce, and Celigo). My architectures guarantee absolute data integrity by enforcing strict idempotency keys, distributed locking mechanics to prevent double-fulfillment, and intelligent message queues to handle external API timeouts gracefully. 3. Enterprise Systems & Solution Architecture Designing modular, highly decoupled, and testable environments from the ground up. I prioritize clean separation of concerns, domain-driven design principles, and strict "API-first" architectures, ensuring the core infrastructure remains untouched even as business rules and providers grow. 4. Performance & High-Volume Data Optimization Hardening and optimizing high-traffic systems where performance bottlenecks mean financial loss. Deep-level database indexing, advanced caching strategies, and comprehensive structural security audits to protect large-scale data synchronization layers. 5. Modernization & System Evolution Transforming complex legacy monoliths into scalable, maintainable architectures. Implementing professional, automated CI/CD pipelines, containerized environments, and rigorous validation workflows that align development speed with enterprise security standards. Strategic Technical Assessment Before your team commits to writing a single line of production code, I offer a dedicated Technical Discovery & Architecture Audit. I will analyze your target workflows, map out data schemas, identify integration bottlenecks, and deliver a predictable, scalable blueprint tailored to your business objectives.

Fractional CTO, 6+ years across .NET, PHP/Laravel, React, and Java/Spring Boot. I build backend systems, payment integrations, APIs, and AI-powered features. Most of my Upwork work has been Stripe — subscriptions, payment gateways, bulk operations, cart integrations. Also ship full-stack apps, booking systems, and WordPress plugins. I respond fast, deliver early, and don't need hand-holding.

Hi! I can help with all things Stripe 🟣 For the last 6 years, I've delivered 100+ projects in E-Commerce, EdTech, FinTech and SaaS. Working in these domains allowed me to get really good with popular payment gateways such as PayPal, Mollie, and most of all - Stripe. Whatever the provider, with payments, the devil is in the details: - webhooks that fire twice (or never) - SCA redirects that silently kill conversions - test mode behaving nothing like production I've hit every one of these in production - and believe me, some I learned the hard way :) Those lessons shaped how I work: I don't just wire up the API and move on. I step into your architecture and make sure your billing, subscriptions, and payment flows are optimized end-to-end. But that's enough of marketing talk 😄 Here's exactly what I can help you with: - End-to-end Stripe integration: Checkout, Payment Intents, SCA/3DS - Subscriptions & billing (plans, trials, upgrades/downgrades, proration) - Stripe Connect for marketplaces and platforms - Webhook handling (idempotency, retries, monitoring) - Debugging failed payments, broken billing logic, and messy legacy integrations - Migrations: to Stripe, between gateways, or off a no-code backend - Mollie & PayPal when your market needs more than Stripe Need more than just payment integration? Let me know! With 6 years as a Full-Stack Engineer, I've shipped 100+ projects end-to-end that are making revenue to this day: multi-tenant SaaS platforms, AI integrations, performance optimization (2x-5x speed boosts), auth, RBAC, the list goes on. What clients say: ⭐ "Great communication and implementation speed. Best!" ⭐ "Responsive, clear communication, delivered on time - I'd happily hire him again." ⭐ "Rasul does everything in his power to deliver the cleanest and best working code I've seen." Core stack: - Payments: Stripe Billing, Stripe Checkout, Stripe Connect, webhooks, Mollie, PayPal - Frontend: Next.js 16, React 19, TypeScript, Tailwind - Backend & DB: Supabase (Postgres, Auth, RLS), Node.js, NestJS, PostgreSQL, Redis - Cloud: AWS (Certified Developer - Associate), Docker, CI/CD, Vercel - AI: OpenAI, Claude & Gemini APIs, Vercel AI SDK ✅ Available for urgent payment fixes, complex builds, and long-term partnerships. Send me a message or a short Loom describing what you're building (or what's broken in your checkout), and I'll get back to you within 24 hours with my take on it and a rough plan. Talk to you soon! STRIPE BILLING | STRIPE CHECKOUT | STRIPE CONNECT | STRIPE RADAR | STRIPE API | STRIPE TERMINAL | FINTECH, SAAS, AI | PAYMENTS | COMPLIANCE (PCI DSS, GDPR)