Build production-ready AI agents, RAGs with LangChain + GPT for SaaS companies. Cut dev time 50% and scale to tens of thousands of users. Recent client feedback: “Zak was awesome! He delivered exactly what I asked faster than I expected! He is extremely knowledgeable” I don’t just write code, I solve business problems. Whether you need an AI agent handling customer inquiries 24/7, a custom workflow that eliminates manual tasks, or a scalable web application, I deliver solutions that save time and generate ROI. What I specialize in: 🤖 AI Agents & Automation by • Custom ChatGPT/Claude integrations • Workflow automation (Zapier / n8n alternatives) • Data processing pipelines • Lead generation bots ⚡ Modern Full-Stack Development Turning AI-generated prototypes into real applications - Yes, Vibe coding got you 80% there in 2 hours, but now you need the other 20% that actually matters: security, authentication, error handling, database design, and deployment that doesn’t crash at 3am • Next.js 14+ with App Router • React/TypeScript applications • Node.js/Python APIs • Real-time applications (WebRTC, WebSockets) ☁️ Cloud & Infrastructure • AWS serverless architecture • Database optimization (PostgreSQL, DynamoDB) • API design and integration • Performance optimization My approach: Fixed-price or hourly projects with clear deliverables. You get working software, not just hours logged. I handle the technical complexity so you can focus on growing your business. Ready to automate your next bottleneck or build something that scales? Let’s talk.

I help SaaS companies design and scale backend systems that handle growth, complexity, and performance without breaking. With 25+ years of experience in software architecture, I specialize in building cloud-native systems on AWS that are reliable, scalable, and built for long-term growth. If your system is becoming slow, difficult to maintain, or unable to scale, I can help you redesign it into a clean, high-performing architecture. What I focus on: • SaaS Architecture & System Design (scalable, modular systems) • Backend Development (APIs, microservices, event-driven systems) • AWS Cloud Architecture (Lambda, ECS, RDS, S3, VPC, cost optimization) • System Refactoring & Modernization (monolith to microservices) • Performance Optimization & Scalability • DevOps & Infrastructure (Docker, Kubernetes, CI/CD) Recent Impact: • Reduced infrastructure cost by 40% by re-architecting a legacy ERP into AWS microservices. • Built an AI-powered recommendation system that increased user engagement by 25%. • Developed a real-time analytics platform, reducing data latency from minutes to seconds. • Automated complex workflows, saving teams 200+ hours/month through intelligent system design. I don’t just write code. I design systems that scale with your business. If you're building or scaling a SaaS product and need a strong architectural foundation, feel free to reach out. Let's discuss your system.

I've been programming for 30+ years and have my own software company Argil DX. Been focused on web technologies since 1995 and have made a career of providing web content management solutions for fortune 1000 customers for the past 16 years. Web Content Management consultant at the top of the WCMS foodchain with 20 years of WCMS experience, 24+ years of web experience, 28+ years of programming experience and a BS in computer science. I began developing web sites in 1995 for Stream International. I moved on to working on the Intel Web Outfitter web site on the web publishing side and from there branched off to web content management. I worked in a mix of web development and content management for the next 17 years, mostly focusing on WCMS with Interwoven (Autonomy) TeamSite and most recently Day/Adobe Communique 5 (aka CQ5 or Adobe Experience Manager.) Specialties: Project Estimation, Budgeting, Recruiting, Adobe Experience Manager (CQ5/AEM), Java, JavaScript, Python, WordPress, HTML, Interwoven TeamSite, Perl, technical documentation, workflow development, CSS, JQuery, PHP

⭐MVP Delivery in 72 Hours Guarantee ⭐Certified Project Manager and Scrum Master ⭐Agile Master and Project Management Professional ⭐12+ years of experience in full-stack development ⭐5+ years of experience in product management ⭐Development and management of large-scale projects ⭐ Available to talk at all times ⭐Director of Rotaract International (Volunteering) ⭐ Areas of our Expertise/Specialization:⭐ ✔ Logistics / Transportation & Travel Platforms ✔Marketplace / Multi-Vendor(E-commerce) Marketplace ✔Education/Online Tutoring/ E-Learning/LMS ✔Real Estate / Property Management with IDX and MLS integration ✔Booking Management System ✔Healthcare /Telemedicine Platform ✔Inventory/Dashboard Management System ✔Job Board/Recruitment Platform ✔Enterprise Solution (ERP & CRM) ✔Finance Platform ✔Directory/Listing Platform ✔E-Commerce/Online Shop ✔Restaurant Management System I provide professional software engineering services and help customers achieve their business goals by coding, building a dev team, and filling expertise and technological gaps. ⭐Technologies we work with⭐ ✔ HTML5/CSS3/SCSS/LESS/Bootstrap(W3C standard) ✔ JavaScript (React JS, Next Js, Ajax, jQuery, Vue, Vuex, Angular) ✔ Mobile-friendly layout coding (Responsive design) ✔ UI / UX designing for your digital products ✔ Wireframing for UI/UX concepts ✔ PHP ( Framework like Laravel, Codeigniter, etc. ) ✔ Node.js ✔ CMS: WordPress, WooCommerce ✔ Restful API (Google APIs, Payment Processing, SSO Integration, Mailgun, Twitter, Facebook, Twilio, Apple News Publisher, Android, and iOS API) ✔ Database: MySQL, PostgreSQL, MongoDB, SQLite, MS SQL Database ✔ NoSQL: Redis, Mongo ✔ Payment Gateways: PayPal, Stripe, Braintree, Wirecard ✔ LAMP Stack (Linux, Apache, MySQL, PHP), MEAN (MongoDB, Express.js, Angular, and Node.js), MERN (MongoDB, Express.js, React, and Node.js) ✔ DevOps: Linux/Nginx, Terraform ✔CI/CD Automation (Git, GitHub, GitHub Actions) ✔ Mobile apps development (Flutter, React Native), Android and IOS apps ✔ Database Migration and New Development ✔ Web Services: AWS Server, Google Cloud, MS Azure My team's goal is to give you confidence that the development will be done according to your expectations, and even better. We will help when you are looking for a reliable developer or technical partner to make your business work. I appreciate that you have reviewed my profile. Thanks!

Most automation freelancers take weeks to deliver something that breaks in a month. I build AI automation and workflow systems that go live in 72 hours and keep running after I hand them off. ✅ 𝟒𝟎+ 𝐲𝐞𝐚𝐫𝐬 of development and operations experience applied to AI automation ✅ 𝐑𝐢𝐬𝐢𝐧𝐠 𝐓𝐚𝐥𝐞𝐧𝐭 on Upwork with 100% Job Success Score ✅ 𝐀𝐈 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 delivered live in 72 hours, with full documentation and zero tech black box Ready to scope your automation? 𝐒𝐞𝐧𝐝 𝐦𝐞 𝐚 𝐦𝐞𝐬𝐬𝐚𝐠𝐞 and I will tell you exactly what I can build and how fast. I respond same day. I specialize in n8n automation, Make, and Zapier workflow systems that eliminate manual tasks, follow up leads automatically, and run business operations in the background without anyone babysitting them. My work covers AI agent development, voice agent systems, lead generation automation, CRM workflow automation, and multi-tool API integrations built to actually keep working after delivery. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 𝐒𝐭𝐚𝐜𝐤 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ Workflow Automation: n8n, Make, Zapier, multi-step logic, cross-platform integrations ▸ AI Agent Development: GPT-4, GPT-5, LangChain, conversational AI, voice agent systems ▸ Voice AI: ElevenLabs TTS, speech-to-text pipelines, calendar booking, 24/7 call handling ▸ Lead Generation Automation: Apify scraping, AI-personalized outreach, CRM sync ▸ CRM and Sales Automation: lead routing, follow-up sequences, deal stage triggers ▸ Content and Ad Automation: AI-generated scripts, social posting workflows, ad copy pipelines ▸ API Integration: webhook orchestration, data sync, multi-tool connectivity I build n8n automation workflows, Make scenarios, and Zapier integrations that connect your CRM, email, calendar, and communication tools into a single automated system. Whether you need an AI voice agent that handles inbound calls and books appointments, a lead generation workflow that finds prospects and writes personalized outreach automatically, or a CRM automation that follows up every lead within minutes of contact, I scope it, build it, document it, and hand it off production-ready. Most automation breaks because it was built fast and never tested under real conditions. Every workflow I deliver includes error handling, failure alerts, and documentation your team can read and maintain without needing me on retainer. 𝐖𝐡𝐚𝐭 𝐜𝐥𝐢𝐞𝐧𝐭𝐬 𝐬𝐚𝐲 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⭐⭐⭐⭐⭐ "A truly professional and dedicated automation expert... Highly recommended for all who need assistance with automation." - Mariia V. ⭐⭐⭐⭐⭐ "He took the time to clarify all my expectations and project details before starting... His communication skills are at a very high level." - Christal B. ⭐⭐⭐⭐⭐ "Very competent, knowledgeable, personable, easy to work with, very detail oriented, delivered a fine world class product." - Horace E. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 & 𝐔𝐬𝐞 𝐂𝐚𝐬𝐞𝐬 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ Sales and Lead Generation: automated prospecting, outreach, and follow-up ▸ Customer Support: AI voice agents, FAQ handling, appointment booking ▸ Marketing: AI-generated ad scripts, social content workflows, campaign automation ▸ Operations: data sync, reporting pipelines, internal workflow automation ▸ Real Estate, Agencies, SaaS, and Service Businesses My n8n automation and AI agent work is particularly well suited to small and medium businesses that are growing faster than their manual processes can support. If your team is copying data between tools by hand, chasing leads manually, or running on workflows that exist only in someone's head, those are exactly the problems I fix with workflow automation built on n8n, Make, or Zapier. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 𝐌𝐲 𝐚𝐩𝐩𝐫𝐨𝐚𝐜𝐡 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Every automation engagement starts the same way: you tell me what you want to automate, what tools you are using, and what outcome you need. I map the cleanest path to get there, tell you exactly what I will build, and get to work. Most projects go live within 72 hours. Everything ships with full documentation so your team understands what was built and can maintain it without me. Not ready to commit to a full project yet? Start with my 2-hour money-back guaranteed trial. You will know within the first task whether we are a good fit. If not, you pay nothing. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📩 𝐋𝐄𝐓'𝐒 𝐁𝐔𝐈𝐋𝐃 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Tell me what is slowing your business down and I will tell you exactly how to fix it with automation. 𝐒𝐞𝐧𝐝 𝐦𝐞 𝐚 𝐦𝐞𝐬𝐬𝐚𝐠𝐞 and let us get started.

Most AI integrations look great in demos and fall apart three weeks into production. The context windows bloat, the agents loop, the RAG pipeline hallucinates, and no one knows why. I build the architecture that prevents that; proper chunking strategies, grounded retrieval, fallback handling, and deployment that holds under real usage. If your LLM is hallucinating outside its knowledge base, your RAG retrieval is returning wrong chunks, or your AI workflow is breaking between n8n nodes and your backend, that's the kind of problem I'm called in to fix. And build the right way from scratch when there's time to do it properly. ✦ What I build: » RAG systems & LLM integrations: OpenAI, Claude, Gemini APIs; LangChain, LlamaIndex, vector search with Pinecone, FAISS, Weaviate. » AI agents & multi-agent workflows: tool-calling, memory, orchestration, real task execution. » Workflow automation: n8n, Make, Zapier, Pipedream; event-triggered pipelines that run without supervision. » Full-stack web apps: Laravel, React, Next.js, Node.js, Python; from MVP to multi-tenant SaaS. » AI-powered internal tools: knowledge bases, ops assistants, document processors, compliance systems. ✦ Recent work I've shipped: » Built a multi-agent AI platform (React + Laravel + Python) with OpenAI, Gemini, and Claude integration, RAG pipeline, and role-based agent orchestration. The system handles real business workflows, not just chat demos. » Implemented AI fraud detection, automated product description generation, meta-ad analysis, and image creation pipelines using OpenAI, Gemini, and Claude for a large US-based e-commerce platform. » Built an AI ops assistant for a 30-year-old insurance consultancy, RAG-based chat grounded in approved SOPs, auto-generated agency-specific compliance guidelines from survey data, versioned document management. Audit handling time dropped by 45%, training ramp-up cut by roughly half. » Built an automated email management workflow using n8n, incoming emails classified by type, routed to AI reply generators with tone-specific prompts, logged to Airtable, and Slack-notified. Resulting in zero manual triage. » Built patient intake and therapy adherence systems for (NASDAQ: AHCO), HIPAA-compliant, Brightree-integrated, handling millions of patients across 40+ US states. Intake processing time reduced by 70%. » Built a hybrid care outpatient treatment platform for a NASDAQ-listed healthcare clinic, virtual + in-person care, symptom tracking, AI chatbot, HIPAA/HITRUST/SOC2/CURES compliant. ✦ Stack: » AI/ML: OpenAI, Claude, Gemini, LangChain, LlamaIndex, RAG, embeddings, fine-tuning, prompt engineering, n8n, Make. » Backend: Laravel, Node.js, Python, RESTful + GraphQL APIs, background jobs, multi-auth. » Frontend: React, Next.js, Vue, component-driven UI, real-time dashboards. » Databases: PostgreSQL, MySQL, MongoDB, Supabase, Vector DBs (Pinecone, Weaviate, FAISS). » Cloud & DevOps: AWS, GCP, Azure, Docker, Kubernetes, GitHub Actions CI/CD. » Healthcare: HIPAA, Brightree, Redox, Auth0, Twilio, HITRUST. I work best on projects that have real moving parts, systems that need to be reliable, not just impressive in a demo. If you're building something production-grade and need someone who handles both the AI and the engineering behind it, let's talk.

With over 20 years of extensive experience in software development, a strong foundation in a variety of programming languages, and a proven track record in delivering efficient and scalable software solutions, I am confident in my ability to contribute effectively to your team. I specialize in full stack development, data engineering, database design, cloud migration, API integrations, and enterprise application modernization. My main technical strengths include .NET, C#, React, Angular, SQL Server, PostgreSQL, AWS, Azure, ETL, SSIS, Power BI, Tableau, Docker, Kubernetes, and microservices. Throughout my career, I have worked with healthcare, fintech, government, aviation, and enterprise clients. I have built web applications from the ground up, optimized slow systems, designed data warehouses, created ETL pipelines, developed reporting dashboards, migrated legacy systems to modern cloud platforms, and led development teams through full project lifecycles. I can help with: • Full stack web application development • NET / C# backend development • React / Angular frontend development • SQL Server / PostgreSQL database design • ETL, SSIS, data warehouse, and reporting • AWS / Azure cloud deployment and migration • API integrations and microservices • Power BI, Tableau, and Grafana dashboards • Legacy system modernization and performance optimization I am comfortable working independently or as part of a team, and I can take a project from requirements gathering and architecture through development, testing, deployment, and ongoing support. My goal is always to build solutions that are secure, scalable, reliable, and easy to maintain.

Hello, thanks for reviewing my profile. ~10 years in web and application development. Experience with various languages, including but not limited to C++, C#, PHP, Java, JS, and Python. Experience with various hosting platforms and project management tools, including but not limited to AWS, Docker, Git and SSH. Extensive experience with HTTP REST APIs and OAuth / OAuth2 protocols.

🏆 Top Rated | 100% Job Success | 5/5 Client Ratings | 15+ live apps shipped 🏆 I build mobile apps with AI baked in, the kind that actually ship and actually get used. With 15+ apps live on the App Store and Google Play, I've worked across fintech, health, e-commerce, and SaaS, helping founders go from Figma to launch and helping established teams retrofit AI into products users already love. Where I help most: AI-powered mobile apps OpenAI (GPT-4), Google Gemini, LangChain, RAG pipelines with vector databases, smart assistants, and predictive features that feel native rather than bolted on Cross-platform builds in Flutter or React Native one codebase, native feel, faster to market without the usual UI compromises Native iOS (Swift) and Android (Kotlin) when you need camera, BLE, on-device ML, or platform-specific performance End-to-end delivery UI implementation, Firebase/Supabase/AWS backends, REST and GraphQL APIs, CI/CD, and App Store + Play Store submission How I work: I respond to invitations within a few hours, share a Loom walkthrough of my approach before we kick off, and ship in weekly milestones so you always know where things stand. If you have a brief or even just a rough idea sketched on a napkin, send it over. I'll come back with questions, a realistic timeline, and an honest take on whether I'm the right fit for the project. Mobile App Development, iOS Development, Android Development, Flutter, React Native, Swift, Kotlin, Firebase, OpenAI API ChatGPT Integration, Gemini AI, AI Mobile Apps, Cross Platform App API Integration, UI UX Design, Mobile UI App Development, Native Mobile Apps, SaaS Apps, Ecommerce App Development

I design and build custom platforms, high-converting websites, and web applications for governments, investment firms, and funded startups. Currently building the Cayman Islands National Resilience Scorecard, the country's first online decision-support platform, funded by the European Union through the Green Overseas (GO) Programme, implemented by Expertise France and IRMA. This is a national-scale web application serving multiple government ministries. I also have 10+ years helping commercial teams ship revenue-critical products, including teams backed by Coinbase Ventures, Sequoia, and Techstars that have collectively raised over $1B. Recent commercial work includes a boutique investment firm website ($7,500 engagement, 5-star review), a university web application, and conversion-optimized ecommerce stores. Whether you need a custom web application, a website redesign, an online store, or a platform that handles complex workflows, I bring product thinking, clean design, and senior engineering to every project. WHAT I DELIVER - - - - - - - - - - Website Design & Redesign I'm a website designer who builds clean, fast, fully responsive sites. Whether it's a brand new company website, a full redesign of an outdated site, or a high-converting landing page, I handle design and development end to end. Webflow Development: Sites built using Webflow and Finsweet's Client-First framework Ecommerce & Online Stores: Custom Shopify development, theme customization, and stores that convert Design-to-Code: Convert Figma, Adobe XD, or Sketch files into responsive websites SEO & Speed: Optimized sites that rank higher and load in under 2 seconds Landing Pages: Boost conversions for campaigns, product launches, and lead generation Custom Platforms & Web Applications Decision-support tools and dashboards for government and institutional clients Multi-stakeholder workflow platforms with complex user roles Data visualization and indicator-driven interfaces Booking systems, customer portals, and internal tools React/TypeScript applications with custom backends TECH STACK - - - - - - - - - - Development: HTML/CSS, JavaScript, Liquid (Shopify), React, TypeScript, Node.js Design: Figma, Adobe XD, Photoshop, InVision, Illustrator Platforms: Webflow (Client-First), Shopify, Squarespace Mobile: React Native (iOS and Android) CLIENT RESULTS - - - - - - - - - - "Chris did an outstanding job modernizing our Silicon Valley based management technology consulting firm's website. He used Webflow skillfully to create a clean, mobile friendly design that replaced our outdated site with a modern, mobile-friendly, and professional look. From rapid mockups to final delivery, Chris worked at a patient and deliberate pace; never rushed and always thoughtful. He is soft spoken in the best way: calm, clear, and responsive throughout. A pleasure to work with, and we highly recommend him to anyone looking for a web designer with strong design instincts and a collaborative approach!" "Chris delivered our new company website design and implementation under tight timelines and with excellent quality. I would hire him again for his design skills, organization, creative eye, and professional engagement." "Chris rebuilt our Webflow store, sales grew 50% in 6 months!" Recent Work: National Resilience Scorecard for the Cayman Islands Government (EU-funded, React/TypeScript) Custom web application for a university in Boston Webflow-based inventory tracker for a warehouse (reduced errors by 40%) Conversion-optimized landing page for a contractor (leads increased 120%) WHY WORK WITH ME - - - - - - - - - - 10+ years shipping products for governments, investment firms, and funded startups, from national platforms to high-converting ecommerce stores Techstars alum, 100% Job Success on Upwork, clients whose products have collectively raised over $1B Clear communication, scoped timelines, and a process built around getting to launch without surprises Ready to discuss your project? Book a quick call!