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NodeJS Developer with 5+ years of proven professional of experience in software development Knowledge & Skills: ✅ NodeJS / JavaScript / TypeScript ✅ ExpressJS, NestJS, GraphQL, Websocket ✅ PostgreSQL, MongoDB, MySQL ✅ Jest, Git, Docker, Redis, RabbitMQ, BullMQ ✅ React, Vue, Angular ✅ CI/CD Always equipped with knowledge of the latest development trends and the most top solutions for your project

I design and deploy production-grade large scale applications. With proven experience at global companies like 𝗧𝘂𝗿𝗸𝗶𝘀𝗵 𝗔𝗶𝗿𝗹𝗶𝗻𝗲𝘀 and 𝗨𝗻𝗶𝘃𝗲𝗿𝘀𝗶𝘁𝘆 𝗖𝗼𝗹𝗹𝗲𝗴𝗲 𝗟𝗼𝗻𝗱𝗼𝗻, I build robust, scalable, and well-tested web and mobile solutions tailored to your business goals. 🏆 𝗡𝗼𝘁𝗮𝗯𝗹𝗲 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀 (𝗦𝗲𝗲 𝗹𝗶𝘃𝗲 𝗱𝗲𝗺𝗼𝗻𝘀𝘁𝗿𝗮𝘁𝗶𝗼𝗻 𝗶𝗻 𝗽𝗼𝗿𝘁𝗳𝗼𝗹𝗶𝗼) 1 - Drive Weather App (100K+ users) - 2026 Built custom routing APIs using OpenStreetMap and GraphHopper routing engine with vehicle-specific profiles and high-accuracy ETA predictions across North America. 2 - ScooterNav (Netherlands) - 2025 Designed Nedherland's first custom scooter routing solution with ferry handling and regional road optimization. 3 - Turkish Airlines Developer Portal (2024) Delivered enterprise-grade REST APIs suite integrated into one of the world's largest airline platforms. 4 - European Research Council Project (€2.5M Funded, 2021) Contributed as Java Developer & Researcher in an international academic consortium. 5 - “Android Mobile Programming in Java” (2017) Used as a recommended textbook in several Turkish universities. 𝗠𝘆 𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗲 𝗯𝗮𝗰𝗸𝗲𝗻𝗱 𝗮𝗻𝗱 𝗳𝘂𝗹𝗹-𝘀𝘁𝗮𝗰𝗸 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀: - end-to-end system development from concept to production. - AI integration - backend automation platforms - designing scalable APIs - deploying cloud and VPS servers 𝗜 𝗮𝗹𝘀𝗼 𝗵𝗲𝗹𝗽 𝗰𝗼𝗺𝗽𝗮𝗻𝗶𝗲𝘀 𝘁𝗼: - build routing and navigation solutions using GraphHopper and OpenStreetMap. - optimize paths for various vehicle types (cars, trucks, motorbikes, bikes, scooters and so on) and pedestrians - develop high-accuracy ETA systems - deploy scalable geospatial infrastructure - configure geocoding systems (text address to geographical coordinates and vice versa) using Nominatim, Photon, Pelias If you have a question, you can book me for a consultation. We can review the key points efficiently and define the best next steps. 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗦𝘁𝗮𝗰𝗸𝘀: - Frontend Integration & UI Development (Angular, JSF, PrimeFaces, HTML/CSS) - Backend Development (Java & Spring Boot) - Secure Authentication (JWT, Spring Security) - Database (OracleSQL, MSSQL, PostgreSQL, MyBatis, Redis Caching, CouchBase) - Unit & Integration Testing (JUnit, Mockito) - CI/CD Pipelines & Docker - Documentation & Technical Writing (Markdown, Swagger/OpenAPI, ApiCurio) - Domain Expertise: GraphHopper. OpenStreetMap, Nominatim, Pelias 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗲𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 I always aim to improve my skills at all time and get certified by respected organizations.

🏆 Building AI-dirven Software ✅ Java Spring / NodeJs Backend Devleopment ✅ React / NextJs Frontend Development t ✅Development of systems with Artificial Intelligence ✅Flutter mobile development ✅Building ChatBots in telegram and similar platforms I am shipping software. Do you need to build a working website or a mobile application? Do you need a fully working backend system for your application? Do you need a platform which will support AI? Do you need them all? I can both provide technical consultation to support your ideas or build the fully working software for you. 1. Websites are built using the stack of Javascript / Typescript + ReactJs / NextJs with HTML and CSS. 2. Backend services / microservices are built using Java / .NET / NodeJs / NestJs and any type of SQL or NoSQL. 3. Mobile applications are built with Flutter. 4. Chatbots are built with Python / NodeJS 5. Supporting AI / ML models. 🔥I bridge the gap between traditional fullstack development and intelligent automation. 💼 Skills: Full stack Development Development: - Java (Spring Boot, Hibernate, Spring Security, REST APIs) - NodeJs / NestJs frameworks for the backend development - React / NextJs frameworks for the frontend development - MLOps and DevOps - SQL and NoSQL databases - Development of the mobile applications Machine Learning & AI Integration: - ML Model Integration- LLM-Based Custom Solutions (GPT, Claude, Gemini, Llama, Mistral) - Prompt Engineering & Fine-tuning Workflow Automation & DevOps: - Dockerized Deployments, CI/CD pipelines, AWS, DigitalOcean, or any other cloud ⚙️ Why Work With Me? - Strong hybrid expertise: backend + frontend + mobile + ML/AI- Clear, business-focused communication. - End-to-end delivery: from planning to deployment. - Hands-on with Docker, supporting any cloud solutions. 📈 Let's build smart technical solutions that scale and really matter. 📩 Message me today to get started!

Hi! I'm a Full Stack Developer who specializes in Payment Integrations (mainly 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 - these are the things that turn a developer into a Stripe expert, and believe me, some I learned the hard way :) Those lessons shaped how I work as a Stripe Developer: I don't just wire up the Stripe API and move on. I step into your architecture and make sure your Stripe payment flows, subscriptions, and billing 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: Stripe Checkout, Payment Intents, SCA/3DS - Stripe subscriptions & billing (plans, trials, upgrades/downgrades, proration) - Stripe Connect for marketplaces and platforms - Webhook handling (idempotency, retries, monitoring) - Debugging failed Stripe payments, broken billing logic, and messy legacy Stripe integrations - Migrations: to Stripe, between payment gateways, or off a no-code backend - Mollie & PayPal when your market needs more than Stripe Still comparing providers? I also work in advisory mode: payment gateway comparison for your specific case, Stripe integration audits, and billing & subscription architecture reviews - before you commit to code. Need more than just payment integration? Most clients bring me in as a Stripe developer and keep me around for the full-stack work: 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: - Payment Integration: Stripe API (Billing, Checkout, Connect, Radar), 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 ✅ Need a Stripe expert for an urgent Stripe payment fix, a complex Stripe integration build, or a long-term partnership? I'm available. Send me a message or a short Loom describing what you're building (or what's broken in your Stripe 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 INTEGRATION EXPERT | STRIPE PAYMENT INTEGRATION | PAYMENT GATEWAY INTEGRATION | STRIPE DEVELOPER | STRIPE API | STRIPE BILLING | STRIPE SUBSCRIPTIONS | STRIPE CHECKOUT | STRIPE CONNECT | STRIPE RADAR | STRIPE TERMINAL | FINTECH, SAAS, AI | PAYMENTS | COMPLIANCE (PCI DSS, GDPR)

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.

Senior Software Engineer with 5+ years of experience building scalable backend systems and distributed applications using .NET and Node.js. Experienced in microservices architecture, cloud infrastructure, and full-stack development with React and Angular. Worked on cybersecurity and fintech platforms, developing backend services, enterprise security integrations, and cloud-native infrastructure.