Kadyrbek M.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

Backend engineer focused on building scalable, high‑performance systems for B2B, SaaS, and E‑commerce sectors. Worked on projects including AI‑powered VR language learning apps and omnichannel marketplaces with sophisticated tax rate calculations. Skilled in Node.js and Python, with experience integrating AI models (Whisper, Mistral, custom), real‑time processing, microservices architecture, payment gateways, and delivering features that generate measurable business impact. I prioritize clean architecture, scalability, and guiding teams through complex projects from idea to production. I aim to grow in system design and building high‑impact products that connect emerging tech with real user needs. 𝗠𝗬 𝗦𝗞𝗜𝗟𝗟𝗦𝗘𝗧: 𝗟𝗔𝗡𝗚𝗨𝗔𝗚𝗘𝗦: Python 𝗕𝗔𝗖𝗞𝗘𝗡𝗗 𝗙𝗥𝗔𝗠𝗘𝗪𝗢𝗥𝗞𝗦: Node.js, Express.js, NestJS 𝗥𝗲𝘀𝘂𝗹𝘁𝘀: - Developed a VR language learning app with machine learning integration from scratch in 𝟑.𝟓 𝗺𝗼𝗻𝘁𝗵𝘀 for Beyond Words, creating a unique solution with no full‑fledged analogs worldwide. 𝗥𝗲𝗱𝘂𝗰𝗲𝗱 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗰𝗼𝘀𝘁𝘀 by leveraging free, open‑source tools while overcoming significant technical obstacles. - Built Bounce, an omnichannel e-commerce marketplace with QR code payment functionality, 𝗲𝗻𝗮𝗯𝗹𝗶𝗻𝗴 𝘀𝗲𝗮𝗺𝗹𝗲𝘀𝘀 𝗼𝗻𝗹𝗶𝗻𝗲 𝗮𝗻𝗱 𝗼𝗳𝗳𝗹𝗶𝗻𝗲 𝘀𝗮𝗹𝗲𝘀. Implemented a flexible tax rate management system that automatically calculates prices across Canadian provinces with varying tax rates for different product categories. If this sounds like the kind of expertise your project needs, let's connect, I'd be happy to discuss how I can help. 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀: Backend Developer, Node.js, Python, Express.js, NestJS, FastAPI, Django, TypeScript, JavaScript, PostgreSQL, MySQL, MongoDB, Redis, RabbitMQ, Kafka, AWS, Docker, Kubernetes, CI/CD, REST API, GraphQL, WebSockets, Jest, PyTest, Microservices, B2B, SaaS, E‑commerce, VR Language Learning, Machine Learning, AI Integration, Whisper, Mistral, Open Source, Omnichannel, QR Code Payments, Tax Rate Management, Canadian Provinces, Scalability, System Architecture, Real‑Time Systems, Payment Gateways, High‑Load Systems, Inter‑Service Communication, REST APIs, Message Queues, Event‑Driven Architecture, Service Discovery, Load Balancing, Circuit Breakers, Resilience, Fault Tolerance, Real‑Time Processing, Order Management, Inventory Sync, Concurrency, Optimistic Locking, Point‑of‑Sale, Idempotent Processing, Data Consistency, Exactly‑Once Semantics, Financial Transactions, High‑Load, Retry Logic, Marketplace, Real‑Time Order Processing, Online/Offline Sales, Payment Gateway Integration, Meta Quest, Speech‑to‑Text, Cost Reduction, High‑Volume API, Async Workers, Bull, Concurrent Users, Rule‑Base Engine, Automation, Campaign Optimization, Queues