Hi, I’m Kena Tekalign, a Top Rated Full-Stack Developer with 5+ years of experience building software products from idea to production. I specialize in developing scalable SaaS platforms, APIs, and full-stack applications using modern, reliable technologies. I manage the entire development lifecycle from backend architecture to frontend experience and cloud deployment. My core expertise includes: • Frontend: React.js, Next.js • Backend: Node.js, NestJS, Express.js, Golang • Python: Django, FastAPI, Flask • Cloud & DevOps: AWS, GCP • Mobile: Flutter • AI & LLMs: Machine Learning, NLP, LLM integration, LangChain, LangGraph, RAG pipelines, AI agents I have hands-on experience building AI-powered applications using LangChain and LangGraph, implementing retrieval-augmented generation (RAG), multi-agent workflows, vector databases, and custom LLM pipelines for production environments. I design intelligent systems that are scalable, secure, and optimized for real-world performance. I focus on clean, maintainable code, performance, security, and scalability. I communicate clearly, meet deadlines, and treat your project like my own. If you need someone who can turn your product ideas into reliable, production-ready software including AI-powered solutions I’d love to help.

Expert Vetted Developer I build conversational AI systems that actually ship, scale, and hold up in production, not demos that break under real traffic. With over a decade in the industry including the last 3+ years focused on conversational AI, I have designed and deployed chatbots and voice assistants that handle millions of messages for startups and enterprise teams across the US, helping them cut support costs, automate lead capture, and run 24/7 customer interactions without adding headcount. What I bring to your project: - Conversational AI & LLM Engineering Production bots with Rasa, Dialogflow, and LangChain. RAG pipelines, intent and entity design, context handling, multi-turn flows, and LLM integrations (OpenAI, Anthropic, open-source models) wired into real business logic, not just a chat window. - Backend & APIs High-performance services in Python with FastAPI. Real-time messaging over WebSockets, Redis for caching, queues, and session state, plus Twilio for SMS, WhatsApp, and voice channels. - DevOps & Scale I ship and own the full pipeline: Docker, Kubernetes, CI/CD with GitHub Actions and Jenkins, deployed on AWS and GCP. Your bot stays fast, monitored, and online as usage grows. Why clients keep working with me: - Clear communication and predictable delivery. You always know status. - I think about cost, latency, and maintenance, not just "does it work today." - Clean, documented, handoff-ready code your team can build on. If you need a conversational AI product or a Python backend built right the first time, send me a message with what you are trying to achieve. I will tell you honestly how I would approach it and what it takes. Available for both fixed-scope projects and ongoing engagements. Skills Conversational AI, Chatbot Development, Python, FastAPI, LangChain, Rasa, Dialogflow, LLM, RAG, NLP, DevOps, Docker, Kubernetes, CI/CD, AWS, GCP, Twilio, WebSockets, Redis, API

I work with Web3 teams who already have systems running but need experienced hands to get them production-ready Most of my engagements start mid-project. A team has contracts deployed, validators running, or backend services in place, but things break as real usage gets closer. I step in to review what exists, identify technical risks, and improve stability so teams can ship with confidence My background is in high-performance systems and blockchain infrastructure. I have built low-latency trading systems and DeFi tooling in Rust, worked on Cosmos SDK app chains, and developed full stack Web3 applications from smart contracts through to frontend Before blockchain, I spent 8 years building backend and infrastructure systems across fintech, energy, and enterprise environments What I typically help with: - Smart contract development and review in Solidity and Rust - Rust-based backend services, DeFi tooling, and on-chain integrations - Cosmos SDK networks, validators, and IBC - Full stack Web3 applications using Go, TypeScript, Next.js, NestJS - Blockchain indexers, automation, and operational tooling - Production ops, deployment, monitoring, and observability Core stack: Rust, Go, Solidity, TypeScript, Python, Cosmos SDK, Ethereum tooling, Next.js, NestJS, Docker, Kubernetes, Prometheus, Grafana If you have a Web3 system that needs a careful technical review before pushing further, I am happy to discuss

I build native iOS apps in Swift and SwiftUI including ones that need share/action extensions, App Groups, custom URL schemes, and embedded binaries plus the Go backends and APIs behind them. If you need someone comfortable both in the UI and down at the platform/systems layer, that's my sweet spot. I work across React Native/iOS, Go/Node.js backends, PostgreSQL/MongoDB/Redis, OpenAI integrations, payment/subscription flows, dashboards, wallets, indexers, and real-time data systems. I am a good fit if you need someone who can own the technical flow from backend to app, communicate clearly, and move a product from MVP to production without needing every small detail explained. I also bring a specialty most mobile devs don't have: blockchain and Web3, including smart contracts, wallet integration, blockchain APIs, and Hyperledger Fabric, plus AI integration when your product calls for it. Because I own the full flow (mobile app, backend, and the API contract between them), I'm a single point of accountability. One person ships the whole product, production-ready, instead of you coordinating three. If you're building a mobile app, especially one with Web3 or AI under the hood, let's talk about what you're building.

𝐈𝐝𝐞𝐚𝐬 𝐝𝐨𝐧'𝐭 𝐛𝐮𝐢𝐥𝐝 𝐜𝐨𝐦𝐩𝐚𝐧𝐢𝐞𝐬. 𝐒𝐡𝐢𝐩𝐩𝐞𝐝 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐬 𝐝𝐨. 𝐋𝐞𝐭'𝐬 𝐬𝐡𝐢𝐩 𝐲𝐨𝐮𝐫𝐬. Most founders lose months and thousands of dollars on developers who overpromise, underdeliver, and hand over code that collapses under real users. I'm here to be the exact opposite. I'm a Top Rated Full Stack Developer with 𝟲+ years of experience and 𝟱𝟬+ production applications shipped. I specialize in AI Agents, SaaS MVPs and full stack development built for founders who need things done right, fast and without excuses. 🚀 𝐖𝐇𝐎 𝐈 𝐖𝐎𝐑𝐊 𝐁𝐄𝐒𝐓 𝐖𝐈𝐓𝐇 You're a startup founder or early stage team with an AI product idea. You need someone who can take it from a blank screen to a fully deployed, production ready product without micromanaging, without rebuilding from scratch later, and without wasting your runway on trial and error. If that's you, you're in the right place. ✅ 𝐖𝐇𝐀𝐓 𝐈 𝐁𝐔𝐈𝐋𝐃 𝐅𝐎𝐑 𝐘𝐎𝐔 𝗔𝗜 𝗦𝗮𝗮𝗦 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀 & 𝗦𝘁𝗮𝗿𝘁𝘂𝗽 𝗠𝗩𝗣𝘀 End-to-end SaaS products built for real users and long-term growth not just demos. I handle everything from architecture decisions to final deployment so you can focus on your business, not your codebase. Your MVP will be clean, scalable and ready for real users from launch day. 𝗔𝗜 𝗔𝗴𝗲𝗻𝘁𝘀 & 𝗔𝘂𝘁𝗼𝗻𝗼𝗺𝗼𝘂𝘀 𝗦𝘆𝘀𝘁𝗲𝗺𝘀 I design and build intelligent AI agents that think, decide and act automating complex workflows, handling multi step tasks, and integrating seamlessly into your product. Whether it's a research agent, a sales agent or a fully autonomous pipeline, I build it production ready from day one. 𝗟𝗟𝗠 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀 & 𝗔𝗜 𝗖𝗵𝗮𝘁𝗯𝗼𝘁𝘀 I integrate OpenAI, Claude, Gemini and LangChain into your product to create intelligent assistants, RAG based knowledge systems and document processing tools that work under real world conditions not just in a sandbox. 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀 & 𝗦𝗮𝗮𝗦 𝗜𝗻𝗳𝗿𝗮𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲 Full Stripe integration, role based authentication, protected APIs and scalable user management everything your SaaS needs to charge real customers from day one without breaking under growth. 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 & 𝗪𝗼𝗿𝗸𝗳𝗹𝗼𝘄 𝗦𝘆𝘀𝘁𝗲𝗺𝘀 I build internal tools, business automation pipelines and API integrations using n8n, Zapier and Make turning slow, manual, time wasting processes into fully automated systems that run while you sleep. 𝗖𝗹𝗼𝘂𝗱 𝗗𝗲𝗽𝗹𝗼𝘆𝗺𝗲𝗻𝘁 & 𝗗𝗲𝘃𝗢𝗽𝘀 I deploy on AWS, GCP, Vercel and Azure using Docker, Kubernetes and CI/CD pipelines so your app stays fast, stable and ready to scale as your user base grows from 10 users to 10,000. 🛠𝗖𝗢𝗥𝗘 𝗧𝗘𝗖𝗛 𝗦𝗧𝗔𝗖𝗞 Frontend: Next.js, React, TypeScript Backend: Node.js, NestJS, Django, Python AI & Agents: OpenAI, Claude, Gemini, LangChain, AutoGen, RAG, Pinecone Databases: PostgreSQL, MongoDB, Supabase, Firebase Cloud: AWS, GCP, Docker, Vercel, CI/CD Pipelines Payments & Auth: Stripe, JWT, OAuth Automation: n8n, Zapier, Make, Webhooks, REST APIs AI Tools: Cursor AI, Bolt.new, Lovable.dev, v0.dev 𝗪𝗛𝗔𝗧 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 𝗦𝗔𝗬 𝗔𝗕𝗢𝗨𝗧 𝗪𝗢𝗥𝗞𝗜𝗡𝗚 𝗪𝗜𝗧𝗛 𝗠𝗘 ⭐ "Working with Usman has been nothing short of exceptional. From the very beginning, he proved himself to be highly reliable, communicative and deeply committed to delivering outstanding results. We highly value this collaboration and can confidently recommend Usman to anyone looking for excellence." ⭐ "Good work on an urgent integration. Usman was highly adaptable, was able to spin up a prototype given ambiguous requirements, and got urgent work done in a small span of time." ⭐ "Outstanding work from start to finish. Usman built the entire blog layer in Next.js, handled bilingual routing, SEO structure and seamless Firebase integration. Reliable, communicative and detail oriented highly recommended for any full stack project." ⭐ "He delivered before the estimated deadline with good quality code. Highly Recommended!" 🎯𝗪𝗛𝗬 𝗙𝗢𝗨𝗡𝗗𝗘𝗥𝗦 𝗞𝗘𝗘𝗣 𝗖𝗢𝗠𝗜𝗡𝗚 𝗕𝗔𝗖𝗞 ✔ I communicate proactively you'll never be left wondering what's happening ✔ I think about your business goals, not just the next line of code ✔ 50+ production apps means I've already solved the problems you haven't hit yet ✔ Top Rated on Upwork with real, verified client results across 6+ years ✔ I flag issues early no deadline surprises, no last minute excuses 📩𝗟𝗘𝗧'𝗦 𝗕𝗨𝗜𝗟𝗗 𝗦𝗢𝗠𝗘𝗧𝗛𝗜𝗡𝗚 𝗥𝗘𝗔𝗟 If you're a founder ready to turn your AI idea into a product that real users love send me a message right now. Tell me what you're building and I'll tell you exactly how I'd approach it, what stack I'd use and how fast we can ship it. 𝗧𝗵𝗲 𝗯𝗲𝘀𝘁 𝘁𝗶𝗺𝗲 𝘁𝗼 𝘀𝘁𝗮𝗿𝘁 𝗯𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝘄𝗮𝘀 𝘆𝗲𝘀𝘁𝗲𝗿𝗱𝗮𝘆. 𝗧𝗵𝗲 𝘀𝗲𝗰𝗼𝗻𝗱 𝗯𝗲𝘀𝘁 𝘁𝗶𝗺𝗲 𝗶𝘀 𝘁𝗼𝗱𝗮𝘆.

I help startups and businesses build production-ready web applications that scale, from MVP to 100K+ users. With 9+ years of full-stack development experience with particular focus on finance sector, I've delivered 50+ projects, including fintech platforms with Stripe/Plaid integration, AI-powered applications using OpenAI/Gemini/Grok/Claude, and high-performance APIs handling millions of requests. What I Build: ⤷ Full-stack web applications (Django/FastAPI/React, C# & .NET Core) ⤷ RESTful & GraphQL APIs with clean documentation ⤷ AI/LLM integrations (OpenAI, Gemini, Grok) ⤷ Payment systems & Payment Gateway Integration (Stripe, Plaid, Paypal, Square & Polygon) ⤷ Chrome extensions & Figma plugins. ⤷ Lovable, Replit Pro, V0 & Figma Make. ⤷ Web scraping & automation solutions. ⤷ Financial Reporting & Analysis (Parquet, Excel, openbb, csb, tsv) ⤷ Algo Trading (Backtrader, Zipline, Quantconnect, MetaTrader 5, MQL5 & TradingView) ⤷ Crypto Trading (Mean reversion and trend following) ⤷ Data Analysis (Parquet, Apache Arrow, PyArrow, CSV, Excel) ⤷ ML Finance Models (LightGBM, XGBoost, LSTM, TCN) ⤷ Accounting API Integrations (QuickBooks, Xero, Intuit, Wave, AccountEdge) Core Stack: ✓ Backend: Python, Django, FastAPI, Laravel, NestJS, Spring, Golang, Rust, gRPC ✓ Frontend: React, TypeScript, Vue, Angular, MUI ✓ Database: PostgreSQL, MySQL, DynamoDB, Supabase, MongoDB ✓ Cloud: AWS (Lambda, S3, AppSync, RDS, ECS, EKS), Digital Ocean, Docker ✓ AI: OpenAI API, Gemini, LLM integration, n8n ✓ ML: Self-Supervised Learning Models ✓ Fintech tools & services: Alpaca, IBKR, Binance, Blockchain, nautilustrader & Qlib Why Clients Choose Me: ✓ Clear communication with daily/weekly updates ✓ Clean, documented code you can maintain after handover. ✓ I focus on your business goals, not just feature requests. Recent Results: Built a fintech dashboard, reducing the client's data processing time by 60%. Developed an AI-powered content platform serving 10K+ daily users. Created trading automation tools integrating TradingView APIs and Plaid. Live trading volume: $80M in Q1-3 2025. Complex AWS orchestration using ECS, EKS and other Generative AI Applications. Ready to discuss your project? Send me a message with your requirements, and I'll respond within 24 hours with a clear plan.

Sole technical owner on everything I've shipped, for 8+ years. The biggest: 3+ years as sole technical founder at Due Diligence Software, an Australian legal-tech startup, where I built and scaled an enterprise SaaS for AI-powered due diligence to 750+ users and 50K+ documents. Architecture, AWS infrastructure, billing, auth, integrations, the 3am incidents: every technical decision was mine. After that I built LegalSort solo: an AI legal-document classifier on multi-agent LLM pipelines (Claude, RAG, structured outputs), deployed on AWS. Not a GPT wrapper: custom sampling engine, document taxonomy, schema-validated outputs, confidence scoring, human in the loop. What I offer: 1. AI/LLM engineering. Production LLM systems: multi-agent architectures, RAG pipelines, Claude and OpenAI integrations, evals, prompt engineering at scale. Shipped in my own products and built for clients. 2. Vibe-code cleanup and pre-launch review. Someone (or some tool) shipped you a codebase that "works" but isn't production-ready. I audit what's there, name what's structurally missing, and rebuild what has to survive real users. 3. Full-stack AI product development. End-to-end builds: Go or Node backend, AWS (Bedrock, Lambda, ECS, S3, SQS, SES), PostgreSQL, async pipelines, with the AI layer integrated properly, not bolted on. 4. Cross-platform mobile (React Native / Capacitor). Hybrid apps where the web stack carries over, including finish-and-ship work: taking an existing app the last mile to the App Store or Play Store. 5. Fractional CTO / technical advisor. Architecture reviews, technical roadmap, code review, due diligence on existing systems. Strongest fit for early-stage AI products. Clients keep me around: 100% of my client relationships have run longer than 90 days, several for 3 to 4 years. Top Rated, 100% Job Success, 4.9/5 overall rating across 40+ jobs. Good fit if you want someone who can actually ship AI products, and who'll tell you when something is the wrong call. I give honest pushback, not cheerful agreement.

🚀 Full-Stack Engineer | Back-End Specialist | 8+ Years of Experience Hi! I'm a Full-Stack Engineer with over 8 years of experience building scalable, high-performance web applications and APIs. I specialize in designing robust architectures, optimizing system performance, and delivering clean, maintainable code that drives business success. 🔧 Back-End Expertise Languages: Go (Golang), Node.js, PHP ( Laravel ), Ruby ( Ruby on Rails ), Python ( Django ) Architecture: Microservices, gRPC, RESTful APIs, GraphQL Messaging & Queues: RabbitMQ, Background Workers Databases: PostgreSQL, MySQL, MongoDB, DynamoDB, Supabase 🎨 Front-End Skills React.js, Next.js JavaScript (ES6+), HTML5, CSS3 Responsive UI development, component-based architecture Webflow Framer ☁️ DevOps & Deployment Cloud Platforms: AWS (EC2, S3) Containerization & Orchestration: Docker, Kubernetes (K8s) Deploying and managing scalable services in production environments 💡 What Sets Me Apart Deep understanding of both server-side and client-side technologies for cohesive end-to-end solutions. Strong experience deploying and maintaining production systems using AWS and Kubernetes for scalability and reliability. Proven track record of delivering production-ready, secure, and fast applications in agile environments. Focus on clear communication, timely delivery, and writing code that’s easy to maintain and scale. 🌍 Let’s Build Something Great Whether you need to design a system from scratch, scale your architecture, or improve an existing product, I’m here to help. I pride myself on aligning technical solutions with real business value — let’s talk about how I can bring your project to life.

Over the past 21+ years I have worked across early web systems, enterprise software, blockchain platforms, and AI. These days I spend most of my time helping founders and product teams figure out what they actually need to build, and then building it with them. I enjoy making complex technology feel straightforward. That is something clients come back for. I have spent 10+ years deep in blockchain and the last few fully focused on AI. I can connect those two worlds in ways most developers cannot. Clients tell me they appreciate that I do not just execute tasks. I ask questions, flag things that have not been considered yet, and keep the bigger picture in view throughout the project. ARTIFICIAL INTELLIGENCE AND GENERATIVE AI • AI Agents and Multi-Agent Systems using LangGraph, CrewAI, and AutoGen for task automation, research, and business process orchestration • RAG pipelines and enterprise knowledge platforms using Pinecone, Weaviate, Qdrant, and ChromaDB • LLM integration across OpenAI, Claude, Gemini, and open-source models into real business workflows • MCP, prompt engineering, context management, and agentic workflow architecture • AI-powered trading platforms with ML signal generation, backtesting, risk management, and live execution • NLP, sentiment analysis, OCR, document intelligence, and intelligent workflow automation • Computer Vision for object detection, video analytics, behavioral analysis, and real-time event detection • Model deployment, inference optimization, evaluation frameworks, and production AI infrastructure • Backend systems for AI using FastAPI, Flask, Django, GoLang, and Rust BLOCKCHAIN AND WEB3 • 10+ years across Ethereum, Solana, Polygon, BSC, Tron, Flow, Hyperledger Fabric, Stellar, TON, Bittensor, and Aptos • End-to-end Web3 platforms including DeFi protocols, NFT marketplaces, custodial and non-custodial wallets, DEXs, and dApps • Smart contracts in Solidity, Rust, and Cadence covering ERC-20, ERC-721, ERC-1155, security reviews, and audits • Token launches including ICO, IDO, and IEO ecosystems, tokenomics design, and exchange integrations • Whitepapers, governance models, and go-to-market strategy for public, private, and consortium networks • Layer 2 scaling, cross-chain bridges, and gas optimization • Full project lifecycle from architecture and security design through to production delivery PROJECT HIGHLIGHTS • Built a multi-agent RAG system for an enterprise client processing 1M+ internal documents, reducing research time by 70 percent • Delivered an LLM-powered support agent using OpenAI and LangGraph handling 10,000+ queries per month with over 90 percent deflection rate • Architected an AI algorithmic trading platform with ML signal generation and live multi-exchange execution • Built an automated crypto trading bot running across Binance, Bybit, and OKX with real-time risk management • Designed and deployed a DeFi lending protocol on Ethereum with 5M+ TVL including liquidation engine and governance • Delivered a supply chain traceability platform on Hyperledger Fabric tracking 500,000+ assets annually • Led end-to-end delivery of multiple NFT marketplace platforms with minting, auction, royalty, and secondary market features • Built a real-time Computer Vision productivity monitoring system deployed across 500+ workstations • Delivered an OCR and NLP document processing pipeline that reduced manual data entry by 85 percent for an insurance client INDUSTRIES SERVED FinTech and Trading | DeFi and Crypto | Enterprise SaaS | Healthcare and MedTech | Supply Chain | Real Estate | E-Commerce | Legal and Compliance | Media Platforms HOW I WORK • I ask a lot of questions upfront, not to slow things down, but because the right questions save weeks later • I am easy to talk to, even on technical topics. Non-technical founders tell me I make things click for them • You will always know where the project stands. I do not go quiet and reappear with a finished build • I have worked with clients across the US, Europe, the Middle East, and Asia. Async communication is second nature to me CORE TECH STACK AI and ML: Python, LangChain, LangGraph, CrewAI, AutoGen, OpenAI, Claude, Gemini, HuggingFace, Pinecone, Weaviate, Qdrant, ChromaDB, FastAPI, Flask, Django Blockchain: Solidity, Rust, Cadence, Web3.js, Ethers.js, Hardhat, Foundry, Anchor, Truffle Backend and Infrastructure: GoLang, Node.js, .NET, Docker, Kubernetes, AWS, GCP, Azure Frontend: React, Next.js, TypeScript If you are not sure exactly what you need yet, that is fine. That is usually where the best conversations start. Send me a message and we will figure it out together.

I'm a developer who cares about writing reliable, readable and maintainable code. I've worked with Go the most, but have also worked in Python and Java. I have experience in Docker and CI /CD automation and deployment. Experienced in: - Web frameworks: Go, Flask, Java - Payment APIs: Braintree, Stripe - SaaS application structure - Service-oriented architecture - REST API and WebSockets design - Test-driven development - Performance - Databases: MySQL, PostgreSQL, Redis, Elasticsearch - Queuing systems: NSQ, RabbitMQ, Kafka - Hosting/Infra: Google Cloud, AWS, Heroku I currently work as a Software Engineer at Google. Previous companies I've worked at: Tokopedia (an Indonesian leading E-Commerce, Unicorn Company), Hot Cocoa Software (a service-based company based in Delhi) where I have worked on more than 20 US/UK projects. Github username: rahul2393