⚫ About Me I’m a Computer Science and Engineering student at KUET with strong skills in C, C++, Python, and JavaScript. I enjoy applying my knowledge to blockchain and web development projects. ⚫Blockchain Development I have experience creating tokens and managing presales on Binance Smart Chain, Solana, and XRP Ledger. I specialize in smart contracts, token issuance, and blockchain integration. ⚫Telegram Miniapps & Bots I build Telegram miniapps and bots for the crypto space, focusing on ease of use and smooth wallet interactions. ⚫Web & Landing Pages I design crypto landing pages that are user-friendly and optimized for engagement and conversions. ⚫Why Work With Me? I deliver reliable, efficient solutions with clear communication and timely delivery. Let’s bring your blockchain and crypto projects to life.

I am a Full Stack SaaS Developer specializing in building scalable, subscription-based SaaS products from concept to launch. I help startups, founders, and businesses transform ideas into production-ready software using React, Node.js, Next.js, JavaScript, FastAPI, Flask, Python, Django, LangChain, OpenAI, Claude, PostgreSQL, MongoDB, Supabase, AWS, TypeScript, and modern cloud technologies. Over the past 8+ years, I have helped companies build SaaS applications, customer portals, CRM systems, ERP platforms, marketplaces, AI-powered products, internal business tools, membership platforms, and workflow automation solutions. My expertise covers the complete SaaS development lifecycle from product architecture and MVP development to scaling, optimization, and long-term maintenance. When projects require AI-powered functionality, I bring hands-on experience integrating AI into backend systems. While my primary role remains Full Stack Developer and Backend Developer, I regularly implement AI-enabled workflows, data processing pipelines and LLM-driven features inside SaaS platforms. This allows me, as a SaaS Developer, to deliver AI functionality that is reliable, observable and cost-controlled rather than experimental. Whether you're looking to build a new SaaS product, modernize an existing platform, create a customer-facing dashboard, implement subscription billing, or develop a complex multi-tenant application, I can help deliver a secure, scalable, and user-friendly solution. Many clients on Upwork come to me when they need more than just a developer. They need someone who can understand business goals, architect scalable solutions, and deliver products that are reliable, maintainable, and conversion-focused. 𝗦𝗮𝗮𝗦 & 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: ✓ SaaS Product Development ✓ Full Stack Development ✓ Multi-Tenant SaaS Architecture ✓ MVP Development for Startups ✓ B2B SaaS Platforms ✓ B2C SaaS Applications ✓ Enterprise Software Development ✓ Customer Portals & Self-Service Platforms ✓ Subscription-Based Applications ✓ Stripe Billing & Payment Integrations ✓ REST API & GraphQL Development ✓ Authentication & Authorization Systems ✓ Role-Based Access Control (RBAC) ✓ Admin Dashboards & Analytics Platforms ✓ CRM & ERP Development ✓ Workflow Automation ✓ AI Integrations & Automation ✓ API Development & Integrations ✓ AWS Cloud Infrastructure 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 / 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀: React.js • Next.js • JavaScript • TypeScript • Node.js • Express.js • NestJS • Python • Django • PostgreSQL • MongoDB • MySQL • Prisma • Supabase • Firebase • AWS • Vercel • Docker • Redis • Tailwind CSS • Material UI • Stripe • OpenAI API • Anthropic Claude API • REST APIs • GraphQL I focus on building software that not only works but is designed for growth, scalability, maintainability, and business success. My goal is to become a long-term technology partner for startups and businesses looking to build world-class SaaS products. 𝗖𝗠𝗦 & 𝗘𝗖𝗼𝗺𝗺𝗲𝗿𝗰𝗲 While Full Stack Development is my primary focus, I also build and optimize: • Webflow • Shopify / Shopify Plus / Shopify Liquid • WordPress & WooCommerce • Headless CMS Solutions • Custom Themes & Integrations 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗛𝗶𝗿𝗲 𝗠𝗲 • 8+ Years of Full Stack Development Experience • Strong React, Next.js, Django, Python & MERN Expertise • Product-Minded Approach • Scalable & Maintainable Code • Clear Communication • Long-Term Partnership Mentality • Focus on Business Outcomes, Not Just Features If you're looking for a Full Stack Developer with expertise in React, Next.js, Django, Python, MERN Stack, React Native, or AWS who can take your product from idea to launch and scale, I AM READY TO GET THE BALL ROLLING !! ----------------------------------- 𝗦𝗲𝗮𝗿𝗰𝗵 𝗺𝗲 𝘂𝘀𝗶𝗻𝗴 𝗸𝗲𝘆𝘄𝗼𝗿𝗱𝘀: SaaS Developer, Full Stack SaaS Developer, SaaS Application Developer, SAAS Only, SAAS Development, React Developer, Next.js Developer, JavaScript Developer, TypeScript Developer, Node.js Developer, SaaS Architect, Startup MVP Developer, Software Engineer, Web Application Developer, Product Developer, CRM Developer, ERP Developer, Dashboard Developer, Multi-Tenant SaaS Developer, Subscription Platform Developer, Stripe Integration Expert, API Integration Developer, AI SaaS Developer, Cloud Application Developer, B2B SaaS Developer, SaaS Product Engineer, Full Stack Engineer, AI Development, AI Integration, OpenAI, ChatGPT Integration, LLM Integration, AI Chatbot, Business Automation, Workflow Automation, Shopify Developer, Shopify Plus, WordPress Developer, WooCommerce, Webflow Developer, Headless CMS, Marketplace Development, CRM Development, ERP Development, Dashboard Development, Booking System Development, FinTech, Healthcare, Real Estate, eCommerce, B2B, Logistics, Travel, Education.

Looking for a top-tier AI & ML expert to build cutting-edge AI solutions? With 6+ years of experience, I specialize in LLMs, Gen AI, and RAG-based applications, delivering high-performance, scalable, and production-ready AI models. AI & Machine Learning Expertise ✅ LLMs & Gen AI: Extensive experience with GPT-4o, Claude 3.5, LLaMA 3, Mistral, Gemini, Ollama, LM Studio, and more. ✅ AI Optimization: Fine-tuning, quantization, QLoRA, DeepSpeed, Unsloth, and GPU-based optimizations. ✅ Custom AI Chatbots & NLP: Advanced AI automation, chatbot development, and speech-to-text systems. ✅ Agentic AI & RAG: Expert in LangChain, LlamaIndex, LangServe, LangGraph, and AI-powered autonomous agents. ✅ Vector Databases: Skilled in Pinecone, Chroma, Weaviate, Faiss for efficient AI retrieval systems. This is what sets me apart from anybody else you could hire: ⭐ 𝗧𝗼𝗽 𝗧𝗶𝗲𝗿 𝗧𝗮𝗹𝗲𝗻𝘁 Trained in both startup velocity and enterprise-grade systems — I architect, build, and optimize AI systems that work. ⭐ 𝗥𝗲𝗮𝗹 𝗥𝗘𝗔𝗟 𝗜𝗻𝘁𝗲𝗹𝗹𝗶𝗴𝗲𝗻𝗰𝗲 Beyond toy bots and GPT wrappers — I build intelligent agents, RAG pipelines, and fine-tuned LLM systems that learn, reason, and perform. ⭐ 𝗣𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻-𝗙𝗶𝗿𝘀𝘁 𝗠𝗶𝗻𝗱𝘀𝗲𝘁 Models are just the start. I deliver full backend integration, infra setup, and monitoring so your AI isn’t just a lab experiment. ⭐ 𝗙𝗹𝗲𝘅𝗶𝗯𝗶𝗹𝗶𝘁𝘆 𝗮𝗻𝗱 𝗖𝗹𝗮𝗿𝗶𝘁𝘆 Clear timelines, transparent collaboration, and async-ready communication so you always stay in control. 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 & 𝗔𝗜 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀 🧠 LLMs & Gen AI GPT-4o, Claude 3.5, Gemini, Mistral, LLaMA, Ollama, LM Studio 🛠️ Frameworks & Pipelines LangChain, LlamaIndex, LangGraph, LangServe 💬 Chatbots & Agents Custom NLP, semantic search, RAG, autonomous AI agents 📦 Vector DBs Pinecone, Chroma, Faiss, Weaviate 🧪 AI Ops & Optimization QLoRA, DeepSpeed, Unsloth, HuggingFace, GPU tuning 🔧 Backend & DevOps Python, Node.js, Nest.js, Express.js, Docker, Kubernetes, CI/CD, AWS, Azure 📡 Databases PostgreSQL, MySQL, MongoDB, Vector DBs ⛓️ Blockchain (Past Work) Smart contracts, NFTs, DeFi systems, Web3 integrations Let’s build something groundbreaking! 🚀 Connect now.

Hello, I have around 6 years of full-stack development experience, I have led 20 team-based projects and independently managed over 12 large and medium-sized web & mobile applications. My diverse experience has honed my ability to deliver robust, scalable solutions tailored to meet unique project requirements. I specialize in a wide range of technologies, including HTML5, CSS3 (SCSS/Sass), Bootstrap, Tailwind CSS, TypeScript, JavaScript, ElectronJS, ReactJS (Next.js), NodeJS (Express.js/Nest.js), and Python (Django/FastAPI). I have a deep understanding of REST APIs, microservices, and databases like MongoDB, PostgreSQL, MySQL, and Redis. Additionally, I am proficient in DevOps tools and platforms such as Git, Docker, AWS (EC2, S3), Azure, and NGINX, ensuring seamless deployments and reliable performance. I also offer mobile app development services using React Native and Flutter, enabling the creation of high-quality, cross-platform applications that deliver exceptional user experiences. Plus, I have worked in blockchain technology (Web 3.0, NFT (Ethereum, Solana), NFT Marketplaces (web3, EtherJS), Token Releases and Airdrops (ERC20, ERC721, BEP20, ERC1155), Minting Contracts, Building dApps and DeFi, Crypto Trading Bots). My services include full-stack web development, software architecture design, frontend and backend development, and mobile app development. I also specialize agile project management, responsive web design, and cross-platform compatibility optimization. If you’re looking to elevate your project, let’s collaborate! A single message can set your vision into motion. 🚀

Hello, I'm Fasih, a versatile full-stack developer with 6 years of experience in designing, building, and deploying scalable, robust, and reliable web applications. I'm also proudly an AWS Certified Solutions Architect (Associate) - meaning AWS trusts me to manage their cloud without accidentally shutting down the internet (so far, so good!). My Expertise at a Glance - Frontend Development - - React, Redux - Next.js, Vue.js (and associated ecosystems - because frontend variety keeps the creativity alive) - JavaScript & TypeScript (clean, maintainable code without sacrificing sanity) - Apollo Client, RESTful integration - HTML5, CSS3, ES6+ - Styling & UI frameworks: Material-UI, Tailwind CSS, AntD, Bootstrap (making pixels behave since day one) Backend Development - - NodeJS (Monolith & Serverless) - NestJS (structured and reliable backend magic) - FastAPI, Flask, Django (I speak Python fluently - snakes and all!) - Database concurrency and production-grade stability - Architecture patterns: Client/Server, Producer/Consumer, Event-driven - MongoDB Optimisations (I’ve mastered the art of gently nudging databases into speed mode) - Webhooks, REST APIs, GraphQL - Firebase integration and NGINX configurations - Docker deployments (containers love me, and I love them back - with extensive hands-on experience) Artificial Intelligence & Emerging Technologies - - Large Language Models (LLMs): Prompt Engineering & Fine-tuning - ChatGPT Integration (OpenAI APIs) for conversational AI experiences - LangChain (because chaining LLMs together is the new chaining Promises - exciting, powerful, and yes, occasionally amusing) - Custom AI-driven applications, intelligent chatbots, and NLP solutions (turning machine learning buzzwords into working products) - Data Science & Analytics: Pandas, NumPy, Matplotlib, Seaborn (extracting insights from data one dataframe at a time) - ML & DL Frameworks: Scikit-Learn, TensorFlow, Keras, PyTorch (deep neural nets, minus the headaches - mostly) DevOps & Cloud Infrastructure - - Deep experience managing containerised environments (Docker, Kubernetes, ECS - containers behave best when treated well) - Automated Deployment Pipelines with AWS CDK: Continuous Integration & Deployment (CI/CD), Safe deployments: Canary releases & automatic rollbacks, Multi-stage environments (Dev, Staging, Production), and Slack notifications & manual approvals (keeping teams informed and anxiety levels low) - Extensive AWS Service Knowledge: Lambda, API Gateway, CloudFront, IAM, Cognito, KMS, S3, EC2, SES, SNS, SQS, ELB, CodePipeline, and more (fluent in AWS alphabet soup) Databases - - NoSQL: MongoDB, DynamoDB, Firestore, Firebase Realtime Database - SQL: MySQL, PostgreSQL, Aurora, AWS RDS - Database Design & Optimisation (I speak fluent SQL and NoSQL - and databases appreciate good conversation) Software Engineering & Methodologies - - Requirements gathering, system modelling, design, and rigorous testing - Version Control Systems: Git, SVN - Agile Methodologies (Scrum, Kanban - adaptable development, much like my caffeine intake) Why Choose Me? I have a track record of quickly adapting to new challenges, efficiently picking up emerging technologies, and consistently delivering high-quality work. With a proven ability to integrate modern AI technologies into practical, scalable applications, I provide cost-effective solutions precisely tailored to your business needs. Let's create something exceptional together - and rest assured, your AWS bill and sanity are both safe with me. Looking forward to working with you soon! :)

I’m a senior full-stack engineer specialising in PHP, Laravel, React, scalable architectures, Make, n8n and Zapier automation, and cloud-based application development. I help teams modernise legacy systems, build stable full-stack platforms, and deliver long-term improvements to performance, reliability, and user experience. Over the past 9+ years, I’ve contributed to enterprise applications, large-scale SaaS platforms, multi-tenant systems, and high-traffic products built with PHP, Laravel and React, plus operational automation using make, n8n and zapier. My focus is on clean architecture, predictable performance, maintainable code, and solutions designed to scale as your product grows. What I Do Backend Development (PHP, Laravel, MySQL) I build reliable backend systems in PHP and Laravel, REST and GraphQL APIs, authentication flows, role-based access control, and modular architectures suitable for long-term maintainability. Frontend Development (React.js) I develop responsive interfaces using modern React patterns, collaborating closely with product and design teams to ensure smooth functionality and a clean user experience. SaaS & Platform Engineering I rebuild outdated platforms into modern, service-based and multi-tenant Laravel systems with subscription logic, paymment integration, admin/user separation, and secure asser management, often paired with Make, n8n and Zapier automations. AI Automation & Integrations (Make, n8n and Zapier) I build workflow automations with Make, n8n and Zapier, connect APIs and webhooks, sync CRMs and databases, automate notifications and reporting, and add reliable error handling and retries for production-ready operations that complement PHP and Laravel backends. Search, Optimisation & Performance Engineering I implement fast, accurate search experiences with Algolia, Laravel Scout, or custom fuzzy logic. I refactor inefficient PHP code, optimise database queries, and resolve structural bottlenecks across the stack, including React performance. Cloud, DevOps & Infrastructure I work with AWS (Se, Route53, CLI, ALB, WAF), Docker, CI/CD pipelines, and Linux environments to streamline deployments and support stable production operations for Laravel, PHP, and React apps, with automation hooks via Make, n8n and Zapier. How I Work I work as a proactive partner rather than a task executor. I ask questions, think through edge cases, write tested PHP and Laravel code, build maintainable React UIs, automate repetitive workflows with Make, n8n and Zapier, and remain accountable for quality after release. I collaborate effectively in Agile teams and contribute to long-term codebase health. Achievements • Top-rated Upwork Freelancer with a consistent record of successful delivery • 100% client satisfaction across long-term and enterprise projects • Medalist Software Engineer from Lancaster University • Winner of 7 industry and academic awards in software engineering and product development Tech Stack Backend: PHP, Laravel,, MySQL, GraphQL Frontend: Reactjs, Vuejs, JS, html, csss Cloud/DevOps: AWS, Docker, CI/CD, Linux Automation: Make, n8n and Zapier, webhooks Tools: Git, Jira, Azure Boards Search: Algolia, Laravel Scout, custom search implementations What You Can Expect • Clean, maintainable, and scalable architecture • Clear communication and reliable delivery • Senior-level problem solving and long-term thinking • A developer who improves systems, automates workflows, and ships stable features across PHP, Laravel and React If you need a senior engineer to improve your platefgorm, modernise a legacy system, automate operations with Make, n8n and Zapier, or build a stable application in PHP, Laravel and React from the ground up, I’m available to help.

I specialize in smart contract security with over 10 years of experience in cryptographic systems and more than 5 years focused on blockchain security and DeFi protocol auditing. I have a strong record of success in competitive audits, achieving top finishes and identifying critical vulnerabilities in complex systems. My expertise includes in-depth knowledge of EIPs and familiarity with prominent DeFi protocols like AAVE and Uniswap. I excel in manual auditing and use a range of tools, including Code4rena and Slither, to ensure the highest security standards. My previous role as Head of Blockchain Security Operations at a leading crypto platform honed my skills in protocol-level security and cryptographic key management. If you are looking for a knowledgeable engineer who can enhance the security of your blockchain project, I am ready to help you secure your assets and build robust solutions.

I'm a certified solutions architect for Amazon Web Services with experience in full-stack software development. My typical stack for web development is a React.js front-end paired with a node.js backend hosted on AWS. For mobile development my preferred stack is React-Native but I have experience in native development with Swift for iOS and native Android development in Java. I'd love to help your project at any stage, whether it's UX design, software development, API integration, data migration, or even just bug fixes & documentation. Whether you've got a new idea for an app or need a consult for a redesign on one of your micro-service containers, let me know how I can assist!

🏆 Top Rated Plus · Top 3% · Forward-Deployed AI Engineer · AI Automation & End-to-End Delivery 70+ Projects · 10+ Live RegTech Systems · Agentic AI · LLM/RAG · SaaS Platforms · FinTech · HealthTech · iGaming · Crypto · eCommerce · KYC/AML · Web · iOS · Android · PWA · Flexible Engagement Model If you want a senior AI-native builder who works as an individual contributor but thinks like an executive, ships fast through agentic AI coding workflows, - that's exactly how I work. If you need someone who can hold the room with your executives and stakeholders on Monday - scope, strategy, the hard build-vs-buy calls and then be in the codebase shipping it on Tuesday, that's the rare combination I bring. If you're building AI-powered apps and platforms and need one senior person who can be accountable for the whole team, work out what's actually worth building, and then ship it into production, that's the work I do best. If you've got a prototype that demos well but keeps breaking the moment real users and real data hit it, and you need someone to make it production-grade, that's me. If the spec isn't written yet, the requirements are still ambiguous, and you need someone who can sit with the product and customers, figure out what's actually worth building, and then go build it, that's me too. If you're a founder or operator who's tired of coordinating a row of specialists and just wants one accountable senior person owning technical decisions and the consequences, that's exactly how I work. And if you're moving into a regulated or high-stakes environment — payments, KYC/AML, credit, healthcare where it has to be reliable and compliant, not just clever, that's the deep end I'm comfortable in. Message me and tell me what is the biggest challenge you are trying to solve with technology or problem you want to solve with a product. Where I do my best work: - Greenfield, ambiguous problems where the spec isn't written yet and someone has to define it before a line of code gets written - Teams moving AI from prototype into real production, where deployment, reliability, and cost actually matter, not just a demo - Founder-led and operator-led companies that want one accountable senior person owning the outcome, not a row of specialists to coordinate - Fast-moving startups and scale-ups where product judgment and shipping speed count as much as clean engineering Ten years on both sides of the table: writing production code and leading the teams that ship it. I've founded and co-founded companies, owned product as the product manager and technical product manager (TPM), done the solution architecture, and operated at the CPTO level (Chief Product & Technology Officer). That range is the point. I figure out what's worth building before I build it. On the engineering side: FinTech payment systems, AI-native and agentic products, crypto infrastructure, and regulated-industry automation across Legal, Retail, Real Estate, and Insurance. The AI work spans LLM and RAG pipelines, NLP, voice agents (Vapi, Retell), Telegram and chat bots, fine-tuned models, and full AI workflow automation, built on OpenAI, Claude, and open models, and deployed into production rather than left in a notebook. Day to day I'm in TypeScript, Node.js, React/Next.js, React Native, and PostgreSQL, building through agentic AI coding workflows. Claude Code and Cursor are my primary development environment. On the leadership side: founding-engineer DNA across six startups, including 1hero (acquired), Inkin (300K users, $2M ARR), and Spayon (55+ merchants, $2M+ processed in Q1, 15-person team). I've delivered for enterprises including Deloitte, KPMG, Google, PayPal, and Wargaming, and I've worn the tech lead, engineering manager and CPTO hats. I'm comfortable in regulated environments: PCI-DSS Level 1 architectures, KYC/AML pipelines, FCRA/TILA/ECOA-compliant credit systems, and SOC 2-ready infrastructure. My current model is fractional and forward-deployed. I can embed as a hands-on senior engineer, lead delivery as a technical PM, or operate at the CPTO level, across one full-time engagement or two to three concurrent depending on complexity. If you want one accountable person owning the outcome end to end, that's me. Technical foundation: - TypeScript / Node.js / React / Next.js / React Native - PostgreSQL · REST & API integration - Claude Code, Cursor, LangChain, n8n - LLM, RAG, NLP, fine-tuning · OpenAI, Claude - Voice AI (Vapi, Retell) · Telegram & chat bots - Payments: Stripe, Plaid · Shopify & Shopify apps - Python, PyTorch, FastAPI - AWS / Azure - iOS, Android, PWA, mobile apps

I build scalable AI-enhanced mobile apps that help you launch fast and grow user engagement. If you’re looking for someone who can take a complex idea and turn it into a stable, scalable product — I’d love to help. I work with startups and growing companies to build AI platforms, mobile apps, and SaaS products from MVP to full launch. I care a lot about real results — performance, scalability, and clean systems that are easy to grow over time. I have 14+ years of hands-on experience across full-stack, mobile, and AI development, and I’m comfortable owning projects end-to-end — from architecture and development to deployment and optimization. A few quick highlights: • Top Rated profile (100% job success) • Experience working with enterprise-level standards (CMMI-aligned teams) • Strong track record delivering AI, web, and mobile products used by real users Recently, I worked on a full AI product (iOS, Android, Web) covering backend architecture, AI chat integration, and complete cloud + DevOps setup. Technically, I work across: • Mobile: React Native, Flutter, Swift, Kotlin • AI / ML: LLM integrations, AI assistants, recommendation systems • Backend & Web: Node.js, Python, Django, Laravel, React • Cloud & DevOps: AWS, GCP, Azure, CI/CD pipelines What clients usually like about working with me: • Friendly, clear communication • Strong ownership and reliability • Production-ready, scalable code • Product mindset — I think about your business, not just tasks If you want a developer who’s easy to work with and genuinely invested in your product’s success, I’d be happy to connect and discuss your project. Thanks, Ajay