I build production AI systems — RAG pipelines, LLM agents, and the multi-tenant SaaS they run inside. 14+ years of engineering, now focused on shipping AI features that actually hold up in production, not demos. Recent work: - An AI-Powered Knowledge Assistant with a custom RAG pipeline on AWS — retrieval, embeddings, and grounded answers over a client's private document set. - EnergyArray — a multi-tenant SaaS platform now in production at Tier-1 North American utilities, with secure per-tenant data isolation, real-time ingestion, and AI-assisted features. Stack: Java/Spring, React, PostgreSQL, AWS. What I do for clients: - RAG systems — chunking, embeddings, vector search (OpenSearch/pgvector), evals, anti-hallucination grounding - LLM agents — tool use, function calling, guardrails (OpenAI API or AWS Bedrock, your choice) - Multi-tenant SaaS architecture — data isolation, per-tenant config, billing telemetry - AWS-native delivery — ECS, Lambda, S3, OpenSearch; data stays in your VPC when compliance demands it How I work: - Fixed-scope feasibility audits when you need to know which AI use case will pay off before committing a quarter - Multi-week build engagements with a small senior team - Direct, written, no-fluff communication. I run discovery before I estimate. Best fit: teams adding AI to a real product — SaaS companies, data-heavy startups, and B2B vendors who need it to work in production, not just look good in a pitch. If you're building RAG or agentic AI on AWS and want it done right the first time, send a message — happy to do a 20-minute call.

Your Magento store should be your strongest sales channel — not your biggest headache. I rescue broken Magento stores for a living — and I spoke about exactly that at Magento Meet Ukraine 2025. If your site loads slowly, your Magento 1 is overdue for migration, or your team is afraid to touch the codebase — you're losing revenue every day. I help eCommerce brands fix that. Track record: ✓ Top Rated Plus on Upwork, 100% Job Success Score ✓ $60K+ earned, 1,600+ hours, 38 completed projects ✓ Long-term partnerships: 500+ hours with a single client (ongoing) ✓ Magento Meet Ukraine 2025 speaker — "Magento 2 Rescue Guide" ✓ 5.0 ratings on Magento-specific projects What I specialize in: ▸ Magento 2 / Adobe Commerce development — from feature builds to deep customization on production stores ▸ Hyva theme migrations — modern frontend that loads 3–5x faster than Luma, without rebuilding your store ▸ Magento 1 → Magento 2 migrations — full data, SEO, and extension preservation ▸ Speed & Core Web Vitals optimization — page load under 1.5s, passing Google's thresholds ▸ ERP / CRM / payment integrations — ShipStation, NetSuite, custom APIs ▸ Production-grade server setup — secure, scalable, audit-ready I also work with Shopify for brands evaluating replatforming or running hybrid setups. How I work: I treat your store like a business asset, not a ticket queue. Before I write code, I ask why — because the wrong fix on a live store costs more than the right one delayed by a day. Most of my clients stay for 6+ months because I catch issues before they become incidents and explain trade-offs in plain language, not jargon. I'm probably not the right fit if: × You need someone to copy-paste themes without understanding the stack × You want the cheapest hourly rate on Upwork × You expect production changes without staging or testing If you're serious about your Magento store performing like the business depends on it — let's talk. Send me a message with what you're building or struggling with, and I'll respond within a few hours with honest input on whether I can help.

🔑 𝐀𝐬 𝐚𝐧 𝐞𝐱𝐩𝐞𝐫𝐭 𝐀𝐈 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 & 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐬𝐭, 𝐈 𝐛𝐮𝐢𝐥𝐝 𝐚𝐧𝐝 𝐝𝐞𝐩𝐥𝐨𝐲 𝐀𝐈 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 𝐚𝐧𝐝 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 𝐭𝐡𝐚𝐭 𝐬𝐨𝐥𝐯𝐞 𝐜𝐨𝐦𝐩𝐥𝐞𝐱 𝐩𝐫𝐨𝐛𝐥𝐞𝐦𝐬, 𝐜𝐫𝐞𝐚𝐭𝐞 𝐯𝐚𝐥𝐮𝐞 𝐚𝐧𝐝 𝐢𝐦𝐩𝐫𝐨𝐯𝐞 𝐮𝐬𝐞𝐫 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞𝐬. 𝐊𝐞𝐲 𝐅𝐚𝐜𝐭𝐬: 🧑‍💻 8+ years of experience as a Artificial Intelligence Specialist and Full Stack Developer 🚀 50+ market-winning projects launched ⌛ Around 7500 hours on Upwork 🎯 Top-Rated on Upwork 𝐏𝐫𝐨𝐯𝐞𝐧 𝐂𝐥𝐢𝐞𝐧𝐭 𝐑𝐞𝐬𝐮𝐥𝐭𝐬: 𝐋𝐋𝐌 & 𝐃𝐚𝐭𝐚 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 - Dataflik – ML ranking on 40 years of sales data; ElasticSearch stack serving 200M+ rows for instant address search and lead scoring. - SearchLook – End-to-end background-check platform; 100+ scrapers, AWS pipelines, cron-scheduled waves, MTurk for human-in-the-loop tasks. - Estateza – 24/7 real-estate scrapers with hourly Slack reports, proxy rotation, rent estimator engine, two public/data-sale APIs, AWS→Linode migration with K8s + EL 𝐑𝐞𝐯𝐎𝐩𝐬 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧𝐬 - Huge (Recruitment) — Automated job postings & CV parsing pipeline; scraping + structured data workflows streamlined hiring process. - Haeussler Queue & OT — Token issuance, employee/room allocation + production workflow tracking, dashboards & to-dos. - Zoho CRM + Streamlit — Financial data migration to Zoho; Python/Streamlit dashboards for quick interactive insights. 𝐋𝐋𝐌 𝐂𝐡𝐚𝐭𝐛𝐨𝐭𝐬 & 𝐕𝐨𝐢𝐜𝐞 𝐀𝐠𝐞𝐧𝐭𝐬 - Vapi.ai Assistants – Inbound receptionist bots and outbound sales callers handling thousands of interactions; integrated with CRMs. - Voice Scheduling – Built AI rescheduler/confirmation bots integrated with Calendly and website APIs; reduced human agent workload drastically. - STSMS (Marine Ops) – Operator + customer portals with chat features; mobile offline app for Mooring Masters with push notifications. 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤 & 𝐒𝐤𝐢𝐥𝐥𝐬: - 𝐋𝐚𝐧𝐠𝐮𝐚𝐠𝐞𝐬 & 𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬: Python (Django, Flask, FastAPI, Streamlit), JavaScript/TypeScript (React, Next.js, Angular, Node.js), GoLang for APIs, Solidity for blockchain. → Strong in full-stack app development, backend APIs, and smart contracts. - 𝐀𝐈 & 𝐋𝐋𝐌: OpenAI, LangChain, LangGraph, LlamaIndex, Hugging Face Transformers, TensorFlow, vector databases (Qdrant, Pinecone, Weaviate, ElasticSearch). → Skilled in building RAG pipelines, conversational AI, embeddings, fine-tuning and reinforcement learning. - 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 & 𝐕𝐨𝐢𝐜𝐞 𝐀𝐈: n8n, Make.com, Zapier, Vapi.ai, Twilio, Voiceflow, Dialogflow, Calendly API, Hunter.io, HeyReach. → Expert at workflow orchestration, AI voice assistants, CRM automations and lead qualification. - 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬 & 𝐁𝐢𝐠 𝐃𝐚𝐭𝐚: PostgreSQL, MySQL, MongoDB, ElasticSearch (200M+ rows), Redis, ELK stack (ElasticSearch, Logstash, Kibana). → Experienced in large-scale data engineering, search optimization and real-time analytics. - 𝐂𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬: AWS, GCP, Azure, Linode, Kubernetes, Docker, CI/CD pipelines, VPS clusters, monitoring systems. → Proficient in deploying, scaling, and maintaining high-availability cloud and DevOps infrastructures. - 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬 & 𝐀𝐏𝐈𝐬: CRMs (Zoho, HubSpot, Salesforce), ERPs, Shopify, WordPress, Stripe, PayPal, Google Workspace APIs, Social APIs (Facebook, Twitter/X, Instagram). → Strong in API design, SaaS integrations, and connecting business tools for end-to-end automation. - 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐳𝐞𝐝 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬: Web scraping (Scrapy, Selenium, BeautifulSoup), royalty attribution engines, real-time trading bots, document/PDF Q&A, queue management, automated SEO/blog publishing. → Adept at domain-specific AI systems and industry-focused automation solutions. 🌟𝐇𝐞𝐫𝐞'𝐬 𝐰𝐡𝐚𝐭 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐡𝐚𝐯𝐞 𝐭𝐨 𝐬𝐚𝐲 𝐚𝐛𝐨𝐮𝐭 𝐦𝐞: 🌟 Usama is in the top tier of software developers and data engineers. He is far more than an implementer; he is a strong architect.  During this project set, Usama worked on data from major US corporations 🌟 One of the best developers I have ever worked with. He is always on time and does exactly what he says he will do. I could not recommend him enough. ✅ 𝐖𝐡𝐲 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞: → On-Time & On-Budget → 95% successful track record → Startup to Fortune 100 → Proven experience across all scales → End-to-End Ownership → From design to production deployment ❌ 𝗡𝗼𝘁 𝗮 𝗴𝗼𝗼𝗱 𝗳𝗶𝘁 𝗶𝗳: → Price is your only priority. → You want results in <2 weeks. → You work in gambling/adult industries. Looking forward to working with you!

𝗦𝗲𝗻𝗶𝗼𝗿 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 & 𝗔𝗜 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 with 𝟴+ 𝘆𝗲𝗮𝗿𝘀 building fast, secure, scalable web apps in 𝗣𝘆𝘁𝗵𝗼𝗻, 𝗗𝗷𝗮𝗻𝗴𝗼, 𝗥𝗲𝗮𝗰𝘁, 𝗡𝗼𝗱𝗲.𝗷𝘀 & 𝗥𝘂𝗯𝘆 𝗼𝗻 𝗥𝗮𝗶𝗹𝘀, now with 𝗔𝗜/𝗟𝗟𝗠 integrations. I turn complex requirements into clean, production-ready products that ship on time. Whether you need a brand-new MVP, a complex API, an AI-powered app, a high-volume web scraper, or a senior hand to rescue and scale an existing codebase, I deliver work that's reliable, well-tested, and built to grow with your business. ⭐ 𝗪𝗵𝗮𝘁 𝗜 𝗰𝗮𝗻 𝗱𝗼 𝗳𝗼𝗿 𝘆𝗼𝘂: ✅ Build full-stack web apps from scratch (frontend + backend + database) ✅ Design robust REST & GraphQL APIs ✅ Build 𝗔𝗜 𝗳𝗲𝗮𝘁𝘂𝗿𝗲𝘀: chatbots, RAG, semantic search, AI agents & automations ✅ Large-scale 𝗪𝗲𝗯 𝗦𝗰𝗿𝗮𝗽𝗶𝗻𝗴 & automation (data extraction, bots, pipelines) ✅ Integrate payments, auth, email/SMS, and third-party services ✅ Optimize performance, fix bugs, and refactor legacy code ✅ Deploy, containerize & manage cloud infrastructure (AWS, Docker, CI/CD) 🤖 𝗔𝗜 & 𝗟𝗟𝗠 OpenAI (GPT-4o), Anthropic Claude, Google Gemini, LangChain, LlamaIndex, RAG (Retrieval-Augmented Generation), AI Agents, Hugging Face, vector databases (Pinecone, Weaviate, pgvector, Chroma), embeddings, prompt engineering, OpenAI & Whisper APIs, fine-tuning 🛠️ 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 🔹 𝗕𝗮𝗰𝗸𝗲𝗻𝗱: Python, Django, Django REST Framework, Flask, FastAPI, Node.js, Express.js, Nest.js, Fastify, Ruby on Rails, RESTful APIs, Apollo Server 🔹 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱: React, Next.js, Vue, Angular, Redux, Redux-Saga, Redux-Thunk, Vuex, Vuetify, RxJS, Context API, Gatsby, TypeScript, JavaScript, React MUI, TailwindCSS, Bootstrap, SASS/LESS 🔹 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀: PostgreSQL, MySQL, MongoDB, Firebase, GraphQL, ElasticSearch 🔹 𝗖𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀: AWS (EC2, S3, RDS, Lambda, DynamoDB, Cognito, CloudFront, CI/CD), Docker, Kubernetes, Jenkins, Google Cloud, Azure, DigitalOcean, Git 🔹 𝗪𝗲𝗯 𝗦𝗰𝗿𝗮𝗽𝗶𝗻𝗴 & 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻: Scrapy, Selenium, Puppeteer, Playwright 🔹 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀: Stripe, PayPal, Twilio, SendGrid 🔹 𝗠𝗶𝗰𝗿𝗼𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀 & 𝗥𝗲𝗮𝗹-𝗧𝗶𝗺𝗲: Kafka, RabbitMQ, gRPC, Socket .io, WebRTC 🔹 𝗧𝗲𝘀𝘁𝗶𝗻𝗴: Jest, Enzyme, Cypress, Pytest 💡 𝗪𝗵𝘆 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝗵𝗶𝗿𝗲 𝗺𝗲: ✔️ Senior-level code quality focused on performance, security & scalability ✔️ Clear, proactive communication and consistent updates ✔️ Deadlines respected, scope handled honestly, no surprises ✔️ Long-term partner mindset, not just a quick fix I treat every project like it's my own product. If you want a dependable developer who writes clean code, communicates clearly, and ships on time, let's talk. 📩 Send me a message with a few details about your project and I'll reply with how I'd approach it. 𝗕𝗲𝘀𝘁 𝗥𝗲𝗴𝗮𝗿𝗱𝘀, Abdul Raheel Senior Full Stack & AI Developer | Python · Django · React · Node.js · LLM/AI | 8+ Years #FullStackDeveloper #Python #PythonDeveloper #Django #DjangoREST #RubyOnRails #NodeJS #ReactJS #NextJS #FastAPI #Flask #TypeScript #WebDevelopment #WebDeveloper #APIDevelopment #RESTAPI #GraphQL #AI #LLM #OpenAI #LangChain #RAG #AIChatbot #AIAutomation #WebScraping #Scrapy #Selenium #PostgreSQL #AWS #Docker

Solutions Architect with 8+ years delivering cloud-native infrastructure, backend systems, and production AI pipelines across AWS, Azure, and GCP. Here are a few things I've shipped recently: - Built a real-time data pipeline on Microsoft Azure ingesting and processing over 5 million data points daily reduced processing lag from 3 hours to under 10 minutes. - Designed a multi-region EKS setup on AWS with Karpenter autoscaling and ArgoCD GitOps, cutting infra costs by 35% while improving deploy frequency from weekly to daily. - Built a production RAG pipeline (LangChain + Pinecone + FastAPI) for a SaaS client processing 200k+ documents, cutting query latency from 4s to under 800ms. - Architected a NestJS + TypeScript microservices backend with BullMQ async workers and Prisma ORM, migrated from a monolith with zero downtime in 6 weeks. INFRASTRUCTURE & DEVOPS Kubernetes, EKS, AKS, GKE, Terraform, Ansible, Pulumi, CloudFormation, Docker, Helm, Kustomize, Istio, Karpenter, ArgoCD, FluxCD, Flagger, GitHub Actions, GitLab CI/CD, Jenkins, Blue-Green, Canary, Progressive Delivery, Prometheus, Grafana, Thanos, Loki, OpenTelemetry, Datadog, ELK Stack, Snyk, Vault, OPA, Falco, SOC 2, ISO 27001, GDPR PYTHON FastAPI, Django, Celery, SQLAlchemy, Pydantic, Pandas, Polars, PySpark, Dask, Airflow, Prefect, Boto3, Pytest NODEJS NestJS, Fastify, Express, BullMQ, Socket IO, Prisma, TypeScript, Zod, Jest AI / LLM / MLOPS LangChain, LlamaIndex, Haystack, OpenAI API, Anthropic Claude API, AWS Bedrock, Azure OpenAI, Vertex AI, vLLM, Hugging Face TGI, Triton, Pinecone, Weaviate, Qdrant, pgvector, Milvus, MLflow, Kubeflow, SageMaker, DVC, Weights and Biases, LoRA, QLoRA, PEFT, RLHF, RAG, Hybrid Search, Prompt Engineering DATABASES & MESSAGING PostgreSQL, MySQL, MongoDB, Redis, Cassandra, DynamoDB, CockroachDB, Snowflake, BigQuery, ClickHouse, Kafka, RabbitMQ, SQS, NATS, Redis Streams FRONTEND & API React, NextJS, TypeScript, Tailwind CSS, GraphQL, gRPC, tRPC, REST, WebSockets SERVICES - Cloud Architecture Design and Review (AWS, Azure, GCP) - Kubernetes Setup, Hardening and Optimization - CI/CD Pipeline Design and GitOps Implementation - IaC with Terraform, Ansible and CloudFormation - Python Microservices, FastAPI, Celery, Async workers - NodeJS Services, NestJS, Fastify, BullMQ, real-time APIs - LLM Serving, vLLM, TGI, Bedrock, Azure OpenAI - RAG Pipeline Design and Vector DB Architecture - MLOps, MLflow, Kubeflow, SageMaker pipelines - Full-Stack AI Application Development - DevSecOps, Snyk, Vault, Falco, SOC 2, ISO 27001 - Monolith-to-Microservices Migration - Multi-region HA and Disaster Recovery - Cost optimization audits, AWS, Azure, GCP - Architecture Documentation and Technical Due Diligence I've been in the weeds on enough projects to know what works and what doesn't. If you want honest advice and solid execution, drop me a message and I'm easy to work with.

✅ Experienced (17+) ✅ Certified ✅ 100% Job Success, ✅Top Rated, ✅free Consulations I'm a result-oriented self-motivated charismatic leader with strong organizational and prioritization abilities. Worked in outsourcing (custom software development) in the following domains: e-commerce, social networks, blockchain, insurance, finance, telecommunication, electronic document management systems, RPA (robotic process automation), ERP, AI, Healthcare, IoT, DATA Science, Cyber Security, Security Audit, Supply chain, Real Estate, Blockchain-based identifiers, Blockchain-based healthcare system. Summary - Leading in IT since 2010 - Managing up to 100+ developers (distributed and on-site teams) - General MCA, Blockchain Course 🏆- Certified Enterprise Architect 🏆Blockchain Certified 🏆Agile Certified 🏆Scrum Certified 🏆Project management Certified 🏆Leadership Certified 🏆Communication Certified 🏆 Many other 22+ Certified. Achievements 🥇Enterprise Architecture solutions for more than 50+ projects 🥇Service-oriented company SPEQTO TECHNOLOGIES with more than 6+ Top MNCs experience such as HPE, Docomo, Wipro, Airtel & Avaya as former employee history. 🥇Custom grade-based motivation system for IT specialists I focus on building teams and projects from scratch, introducing software development processes and best practices. At the same time, I dedicate on tasks related to performance optimizations, refactoring and implementing various algorithms. Quick snapshot of my skills: ● Engineering and technical skills ● Programming languages (Node JS, Kotlin, Go, JavaScript, python, Php, Swift, Objective C, Solidity, Rust, React JS, Nest JS, Vue JS, Go Lang) ● Cloud DevOps (Azure, GKE, AWS) - Services & Build Pipelines ● Delivery Management ● Strategic Management ● Performance Management ● Risk Management My core specialization lies in-: 1. Smart contracts 2. Devising custom Blockchain solutions on private/public Blockchains 3. Decentralized applications 4. Setting up of Blockchain architecture 5. NFT Marketplace development 6. Smart Contract audit 7. End to End DApps development 8. Blockchain Consultancy Blockchain Development Services We Offer: ⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷ Being a full-stack blockchain developer & solidity programmer and associated with an ISO certified blockchain development company, I develop rapid, error-free website & web applications to achieve an enterprise's functionality implementation and business logic with minimum complexities ✅ Custom Blockchain Development ✅ Smart Contracts Development ✅ DApp Development ✅ Crowd sale ✅ Hyperledger & Multichain Development ✅ Multichain/Supply Chain Development ✅ Custom Cryptocurrency Development ✅ Crypto App Development ✅ ICO Web Development ✅ POC Development ✅ Cryptocurrency Wallet and Exchange Applications ✅ Private Blockchain Development ✅ Blockchain Consulting ✅ Blockchain Testing ✅ Ongoing Blockchain Development Support and Maintenance ✅ Full-Stack Blockchain Development ✅ Full-Time Dedicated Blockchain Developer Tech Skills: My Skills: • Ethereum • Solidity • Web3.js • NodeJS • React JS • Python • Django • Hyperledger Fabric • R3 Corda • Quorum • JavaScript • jQuery 8+ years’ Experience + NodeJS + Microservices + React JS + Stencil JS + Blockchain (Ethereum + Solidity + DApp + Smart Contracts + Truffle + web3.js + ether.js + NFT + Open sea) My Technical Blockchain Development Expertise: ⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷ Being a full stack blockchain developer, I have decent expertise in Blockchain development and custom smart contract application development technologies: ✅ Server-Side Languages: PHP, Node JS, Java, Spring boot, Microservice ✅ Frameworks: Express JS, YII2, Laravel, Cake PHP ✅ JavaScript Frameworks: Angular JS, jQuery, React JS, Vue JS, Nest JS, Jade JS ✅ Smart contract language: Solidity ✅ Data Management: • RDBMS: MySQL 5.X, PostgreSQL, Amazon RDS • NoSQL: MongoDB. • Caching: Memcached, Redis • Searching: Solr, Lucene, Elasticsearch, Amazon CloudSearch ✅ Queue: ActiveMQ, Amazon SQS ✅ Server Technologies: Linux, Ubuntu ✅ Cloud Computing Platforms: Amazon Web Services ✅ Frontend Stack: • Languages: HTML5, CSS3, Sass, JavaScript • UI Frameworks: Bootstrap, jQuery UI • JavaScript Frameworks: React, Backbone.js, Angular 2 ✅ Third-Party APIs Integration: • Payment Gateway: PayPal, Stripe, Authorize.Net, Coinpayments.net • Social: Facebook, Twitter, Google+ • Geo-location: Google Maps, Bing Maps • File Storage: Dropbox, Google Drive Supported Standards: 1. ERC-20 - Standard tokens 2. ERC-998 - Composable Tokens 3. ERC-721 - NFTs 4. ERC-1155 - NFTs 5. On-Chain NFTS Supported Networks: 1. ETHEREUM 2. SOLANA 3. POLYGON/MATIC 4. BSC 5. AVALANCHE 6. FANTOM 7. Base Chain 8. Cardano I can be your technical, strategic, marketing, and product advisor and consultant to help your company or business learn more about the NFT space and answer any questions you might have about the industry and trends.

Senior Full Stack Developer. Top Rated Plus, 100% Job Success, $276K+ earned across 54 jobs since 2014 on Upwork. CEO/CTO at 2muchcoffee agency. Recent work: Faktastisch (1700+ hrs, $86K, 5-star) full-stack React/Node SaaS rebuild, Proctoring MVP (active), educational platform ($29K React/Next.js), CTO-as-advisor engagements. Past production builds: MediBrain, MyAnswer, VoiceDesk, Cosmo marketplace, Stepler (N1 Swedish Appstore fitness). What I deliver: - Senior full-stack architecture: React + Next.js frontend, Node.js + NestJS backend, PostgreSQL/MongoDB - Code review and architecture consulting for engineering teams - Production-ready SaaS from MVP to scale - TypeScript end-to-end, GraphQL APIs, Supabase, AWS infrastructure - AI integration when projects call for it: OpenAI, RAG, LangChain Tech stack: React, Next.js, Node.js, NestJS, TypeScript, PostgreSQL, MongoDB, GraphQL, Supabase. Strong Angular and Python background. Lead engineer for product teams. Senior Full Stack Developer, Full Stack Developer, React Developer, Next.js Developer, Node.js Developer, NestJS Developer, TypeScript Developer, Architecture Consultant, Code Review Specialist, AI Integration Developer.

💻 Senior Java Developer | Spring Boot | Cloud | E-commerce | Automation | ETL | Space Systems | 10+ Yrs 🚀 10+ years of experience building scalable, cloud-native applications and automation systems using Java (8–21), Spring Boot, and modern DevOps practices. ✅ Why Choose Me? Enterprise Java Expertise: Deep knowledge in Java SE/EE, Spring Boot, Spring Cloud, JPA/Hibernate. Space Software Development: 3 years in mission-critical ground segment systems for satellite operations. E-commerce Automation: Integrated with Amazon SP-API, eBay, Etsy, Walmart, Shopify, and more. Cloud & DevOps: AWS, GCP, DigitalOcean, CI/CD (GitHub Actions, Jenkins, GitLab). ETL & API Integration: n8n, Make.com, custom data pipelines with FTP, SOAP, HTTP. Database Proficiency: PostgreSQL, MongoDB, Oracle, Couchbase, Cassandra, Elasticsearch. UI Skills: HTML, CSS, JavaScript, Bootstrap for clean, responsive interfaces. 🔧 Tech Stack Languages: Java, SQL, JavaScript Frameworks: Spring Boot, Spring Cloud, Spring Batch Cloud: AWS, GCP, DigitalOcean Databases: PostgreSQL, MongoDB, MySQL, Oracle, Cassandra DevOps: Docker, Jenkins, GitHub/GitLab CI/CD APIs/Automation: Amazon SP-API, Shopify, DHL, n8n, Make.com

It was the most important moment of my 13+ years of career. It was when I realized that there is always a trade-off in technology. You have to do something intentionally bad in order to succeed as a Small Medium Business in the Digital Transformation. And 70% fail because they insist on doing this very thing well. A while back, when I finally landed a job in a corporation, I was excited that I was going to use state-of-art technology. But, one of my first features immediately added some bugs. As I fixed those bugs, I introduced another, but also other bugs started to pop up caused by previous developers. In laymen terms, it is like a Rubik’s cube. As you carry on assembling the second face, you may accidentally mess up the first bit. It wasn’t like that when I started my career in technology in the civil service a long time ago. Yes, I was frustrated because we used old boring technology. But, we didn’t have to put out the fire all the time because that limited technology prevented us from getting in this position. Coincidence or not, the easiest way to solve the Rubik’s cube is putting constraints. If you move towards, you have to move backwards at some point. Fast forward to nowadays, some of my clients want to create highly customized User Experience. As the project starts to grow, hyper customization introduces more complexity. Then, you make a small change and get unexpected results. You didn't account for all the complex consequences. And this happens again and again, and you can’t avoid it. The software had become brittle. You start to miss deadlines or have to hire more developers to fix cracks faster, and eventually I get hired. That’s the time I have the hard talk: don’t bite more than you can chew, stop chasing the perfect User Experience (good User Interface is not a problem though) with a small team. If a BigTech didn’t have to hire thousands of engineers to provide that, they certainly wouldn’t. Anyway, User Experience is only noticed by B2C clients, and this is where Big Techs thrive. In B2B or internal tool software, who pays for the software won’t even use it. Hey, my name is João, I’m a software architect and developer, feel free to send me a message asking how I can make your business grow. What technologies do I work with? The simple ones: HTML, CSS, Bootstrap, Bash, XML, PostgreSQL, Apache Camel, Apache Knowledge Is Everything, Keycloak. If you need a hypercustomized solution, I can decently program in Java, Python and JavaScript, though. If you have any doubts, don’t hesitate to contact me.

🔸 IQ 145-163 🔸 26 years of experience 🔸 547 completed projects on Upwork 🔸 Magento | Hyvä | Adobe Commerce: top 10 worldwide, 130 open-source modules 🔸 Shopify   ▹ Migrations from Magento (data mapping, SEO preservation, API sync)   ▹ Liquid programming   ▹ API integrations   ▹ Headless (GraphQL Storefront API, Next.js)   ▹ Custom app development   ▹ Online Store 2.0 (theme app extensions, app blocks)   ▹ Checkout UI extensions   ▹ Web Pixels   ▹ Data Modeling (metaobjects, metafields)   ▹ Functions (backend logic)   ▹ Flow (custom triggers & actions) 🔸 E-commerce analytics   ▹ Google Analytics (including server-side integrations via the Measurement Protocol)   ▹ Google Tag Manager (including server-side tagging/containers)   ▹ Google Ads   ▹ BigQuery   ▹ Meta Ads Manager: Meta Pixel & Meta Conversions API 🔸 E-commerce technical audit   ▹ Codebase & technical debt   ▹ 3rd-party integrations   ▹ Platform-specific health check (Magento / Shopify / WordPress)   ▹ Security, PCI DSS   ▹ Infrastructure & scalability   ▹ Database 🔸 E-commerce UX/CRO audit   ▹ Conversion rate optimization   ▹ Checkout friction & cart abandonment analysis   ▹ Payment gateway & transaction flow audit 🔸 Dashboards & reports   ▹ Google tools: Data Studio (Looker), Analytics, Ads   ▹ Microsoft Power BI   ▹ Grafana 🔸 Technical SEO   ▹ Google Search Console   ▹ Core Web Vitals / PageSpeed Insights   ▹ Schema(.)org & JSON-LD (E-commerce Rich Snippets)   ▹ Crawl budget optimization & log analysis 🔸 Business Intelligence   ▹ Cohort analysis   ▹ Customer lifetime value modeling   ▹ Profitability & margin tracking 🔸 Website Performance   ▹ Google tools: Lighthouse, PageSpeed Insights, Core Web Vitals   ▹ Server tuning: Varnish, Nginx, Linux, MySQL, MariaDB, Elasticsearch, PostgreSQL   ▹ PHP code profiling: Xdebug 🔸 Google Shopping   ▹ Merchant API   ▹ Content API for Shopping   ▹ Dynamic product feeds (XML, JSON, API-driven)   ▹ Automated catalog sync 🔸 Amazon Selling Partner API (SP-API)   ▹ Order synchronization (FBA, FBM, Seller Fulfilled Prime)   ▹ Multi-channel fulfillment integrations   ▹ Catalog, feeds & listings Management   ▹ Dynamic pricing   ▹ Financial & settlement reports automation   ▹ Inventory & replenishment sync   ▹ Amazon Ads API (PPC automation & metrics) 🔸 Amazon Web Services (AWS)   ▹ Elastic Compute Cloud (EC2)   ▹ Elastic Load Balancing (ELB)   ▹ Simple Storage Service (S3)   ▹ Elastic File System (EFS)   ▹ Auto Scaling   ▹ Relational Database Service (RDS, Aurora)   ▹ ElastiCache (Redis) 🔸 Cloudflare   ▹ Advanced caching   ▹ Bot management   ▹ Web Application Firewall 🔸 Elasticsearch   ▹ E-commerce catalog search optimization   ▹ Faceted navigation & filtering performance   ▹ Relevance tuning (query boosting, synonyms, fuzzy matching)   ▹ Autocomplete & instant search implementation 🔸 Make(.)com | Zapier | n8n   ▹ ERP, CRM, PIM & WMS integrations (NetSuite, Salesforce, HubSpot, Akeneo, etc.)   ▹ Omnichannel order, inventory & fulfillment synchronization   ▹ Automated customer onboarding, segmentation & retention workflows   ▹ B2B & B2C automated invoicing and financial reporting   ▹ Custom API connections, HTTP modules & Webhooks (REST, GraphQL, SOAP)   ▹ Custom app / node development (JavaScript / TypeScript / Python)   ▹ Advanced workflow architecture: iterators, routers, parallel processing   ▹ Error handling, logging, auto-retry 🔸 WordPress custom programming 🔸 Discourse (forum) custom programming 🔸 PHP | Python | JavaScript | TypeScript | SQL | Ruby 🔸 GitHub: 52K+ public commits (since 2009) 🔸 Master of Science in Computer Science and Mathematics, specializing in AI 🔸 117 items in my Upwork portfolio 🔸 Publications   ▹ mage2.pro?order=views   ▹ df.tips?order=views   ▹ dmitry.ai?order=views   ▹ discourse.pro?order=views   ▹ oplatform.club?order=views 🔸 Certifications   ▹ PyTorch | TensorFlow | Keras | Machine Learning   ▹ React | Vue.js | Node.js | Angular   ▹ Microsoft: Azure Architect | Azure Data Lake | SQL Server | Power BI   ▹ AWS Cloud Architect   ▹ Elasticsearch | MongoDB | MariaDB | MySQL   ▹ Python | WordPress | PHP