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I'm a senior full-stack engineer with 𝟏𝟓+ 𝐲𝐞𝐚𝐫𝐬 of experience, including nearly a decade building at scale for 𝐀𝐩𝐩𝐥𝐞 and 𝐀𝐦𝐚𝐳𝐨𝐧. Unlike most generalists, I also build production-grade AI features. That combination is rare, and it's why clients hire me. Whether you need a scalable web application, a complex backend system, or AI/LLM capabilities woven into an existing product, I can own it end-to-end, architecture through deployment, frontend through infrastructure. 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 React + TypeScript frontends with clean component architecture, real-time updates, secure auth flows, and performance tuned for real users. Java backends (Spring Boot, WebFlux, reactive systems), Node.js/TypeScript APIs, REST & GraphQL (Apollo), microservices design, and distributed data layers across DynamoDB, SQL, and NoSQL. I build applications that are testable, maintainable, and designed for scale from day one, not patched together after the fact. 𝐀𝐈 & 𝐋𝐋𝐌 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 This is where I pull ahead. When a project calls for intelligence, a chatbot, a knowledge assistant, a RAG pipeline, automated workflows, I don't hand it off to a separate AI contractor. I build it myself, integrated cleanly into the same stack. GPT/Gemini integrations, retrieval-augmented generation, context-aware chat systems, prompt pipeline design, structured output with validation, and hallucination mitigation. AI that's engineered into the product, not bolted on. 𝐂𝐥𝐨𝐮𝐝 & 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 AWS-native architectures, Kubernetes, Helm, Docker, CI/CD pipelines, and production observability with Prometheus, Grafana, and Datadog. SLO-driven monitoring and reliable deployment workflows. Features don't matter if they're not up, I make sure they stay up. 𝐖𝐡𝐲 𝐜𝐥𝐢𝐞𝐧𝐭𝐬 𝐜𝐡𝐨𝐨𝐬𝐞 𝐦𝐞 𝐨𝐯𝐞𝐫 𝐨𝐭𝐡𝐞𝐫 𝐬𝐞𝐧𝐢𝐨𝐫 𝐝𝐞𝐯𝐬:: Most full-stack engineers can't touch AI. Most AI freelancers can't architect real systems. I do both, and I've done it inside two of the most demanding engineering organizations in the world. 𝐒𝐞𝐥𝐞𝐜𝐭𝐞𝐝 𝐫𝐞𝐬𝐮𝐥𝐭𝐬: At Apple, built a React + TypeScript platform for large-scale test execution, developed an AI-powered internal support chatbot, and improved system observability, cutting incident resolution time by 30% and reducing deployment time by 30%. At Amazon, migrated critical systems from Oracle to DynamoDB, reduced infrastructure maintenance by 20%, designed resilient AWS-native services, and helped launch Amazon in new international markets. 𝐈'𝐦 𝐭𝐡𝐞 𝐫𝐢𝐠𝐡𝐭 𝐟𝐢𝐭 𝐢𝐟 𝐲𝐨𝐮 𝐧𝐞𝐞𝐝: A senior engineer who can own your product end-to-end. A full-stack application built properly, architecture-first, scalable, maintainable. AI or LLM features added to an existing product without breaking what's already there. A complex backend, a polished frontend, or both. A technical partner who ships production systems, not prototypes. 𝐇𝐨𝐰 𝐈 𝐰𝐨𝐫𝐤: Architecture-first. MVP fast, production-ready fast. Clean, testable code. Clear communication. Built for scale from day one. I don't build throwaway demos. I build systems that survive production, with or without AI. Let's talk.

✔️ Drupal & WordPress Expert ✔️ Laravel & Vue.js Developer ✔️ 10+ Years Experience, 30K+ Upwork Hours ✔️ MVP & SaaS Specialist ✔️ Full Stack Web Development ✔️ AI-Powered Efficiency ✔️ AngularJS As an IT engineer and seasoned web developer, I build high-performance websites and applications that deliver measurable results. I specialize in Drupal and WordPress development, with a strong focus on security, scalability, and long-term maintainability. Over the past decade, I’ve developed enterprise SaaS platforms, optimized marketing sites for conversions, and built everything from lightweight landing pages to fully custom web applications. I'm just as comfortable working with modern site builders like Webflow and Squarespace as I am building backend systems in PHP, Python, or JavaScript. If you need something custom, from tools and dashboards to integrations and CMS extensions, I can architect, build, and maintain it without hand-holding. What I deliver: 🟢 Custom Drupal and WordPress development 🟢 Conversion-focused frontends with clean UX/UI using Elementor, Gutenberg, and Avada 🟢 Secure, scalable backend systems and API integrations (PHP, Laravel, custom endpoints) 🟢 Performance optimization and technical SEO 🟢 Fast, ongoing support and DevOps where needed 🟢 ADA compliance and accessibility improvements based on WCAG 2.1 standards 🟢 HIPAA, SOC 2, and GDPR-compliant development practices for data privacy and security 🟢 Marketing and analytics integration including GCLID, GTM, GA4, and Meta Pixel Notable projects include: 🏛️ New York University 🏛️ University of New South Wales 🏛️ ADRC Wyoming (nonprofit accessibility initiative) I’ve also worked with multiple Upwork Enterprise clients to improve their web presence and business outcomes. Let’s build something reliable, fast, and built to scale. Skill Highlights: ❯ Drupal, WordPress, PHP, Python/Flask, JavaScript, React ❯ Webflow, Wix, Squarespace, Framer, HubSpot CMS ❯ Performance Optimization, Conversion Strategy, Technical SEO ❯ Custom Tools, API Integrations, Backend Systems ❯ Docker, Pantheon.io, Platform.sh, WP Engine, Azure DevOps ❯ Linux Servers, Nginx, DigitalOcean, AWS, MySQL ❯ Security Audits, GDPR, SOC2 Compliance ❯ Git, Lighthouse Scoring, Cross-Browser QA

If you’re looking for a results-driven, highly experienced professional to tackle your software development needs, I bring over 20 years of expertise in creating impactful, scalable, and secure enterprise solutions. As a Top Rated Upwork professional with a 100% Job Success score, over $50K in total earnings, 34 completed jobs, and 461 hours billed, I’ve built a reputation for delivering exceptional results tailored to client needs. Why I’m the Right Fit for Your Project: Specialized Expertise in Cloudflare with Rust & TypeScript: My current focus is on Cloudflare architecture, where I design and implement serverless applications leveraging the full range of Cloudflare technologies, including: Developer Tools & Application Frameworks: Workers, Pages, Workflows Data Storage & State Management: D1, Durable Objects, Workers KV, R2 Event-Driven Systems & Communication: Pub/Sub, Queues, Calls Media & AI Capabilities: Cloudflare Images, Stream, Workers AI AI-Assisted Development for Speed & Precision: As an avid user of Claude.ai and ChatGPT, I integrate AI tools into my workflow, enabling faster collaboration, innovative problem-solving, and exceptional delivery speed. Extensive Cloud Experience: Beyond Cloudflare, I have a proven track record with Microsoft Azure, AWS, and other leading platforms, ensuring solutions that are robust, scalable, and seamlessly integrated. Proven Track Record: My experience spans industries and use cases, from deploying AI-powered insights for Microsoft Research to building real-time analytics systems and robust SaaS platforms. Recent Achievements: Microsoft Research (FarmVibes-AI): Delivered AI-driven agricultural optimization solutions for the U.S. Forest Service, enhancing data processing and actionable insights. Cloudflare Innovations: Designed and implemented serverless systems and scalable APIs to improve real-time analytics, reduce costs, and optimize business operations. AI-Powered Workflow Optimization: Built advanced systems for image recognition and data analysis, including a project tracking and optimizing sheep shearing processes. Let’s Build Something Amazing: When you work with me, you’re getting a professional who is hardworking, trustworthy, and reliable. My expertise spans the latest tools, techniques, and technologies to deliver tailored solutions that exceed expectations. Whether you need Cloudflare expertise, AI-driven insights, or enterprise-grade application development, I am ready to collaborate and help your business achieve its goals. Let’s create innovative solutions that transform challenges into opportunities and drive your success! Let’s connect and make your project a success!

When a business operation runs on people instead of systems, or when an AI layer drifts because it's answering from generic knowledge instead of the company's own data, or when three platforms are supposed to sync and none of them do, that's the kind of system I built. I build AI systems using Laravel and Python as the foundation. RAG pipelines, multi-agent workflows, LLM integrations, production backends with deep third-party integrations, compliance-grade where the domain demands it. ✦ Work that reflects this: » Built Therapy adherence workflow engine for a home medical equipment provider, 40+ states, millions of patients. Medicare only reimburses CPAP if documented compliance is proven within a fixed window. Built a system that monitors 12 trigger types per patient, low usage, mask leak, high AHI, missed downloads surfaces them by proximity to their reimbursement deadline, not just trigger volume. Every outreach outcome and compliance date writes back to the ERP in the same session. Integrated with device telemetry. Built each trigger type independently, a generic handler for all 12 would have made compliance auditing unmanageable at that scale. » Designed Patient intake pipeline for the same company. Agents were triaging faxes manually, re-keying data into the ERP, entering insurance tiers separately. Replaced the whole thing, document triage, patient matching, primary/secondary/tertiary insurance write-back, sales order creation, document attachment, all through the ERP's services layer in one session. ~70% reduction in intake processing time. » Shipped Virtual-first outpatient care platform for a NASDAQ-listed healthcare clinic. Two treatment journeys: overactive bladder and menopause. Symptom checking, daily tracking tools, behaviour recording, compliance reports auto-distributed to ordering physicians. Integrated Auth0, Redox, SurveyJS, Kommunicate, Convo, Twilio, Logrocket. Compliance surface: HIPAA, HITRUST, OWASP, SOC2, CURES. » RAG-based AI operations assistant for a 30-year insurance consultancy. Hard requirement: cannot answer outside its approved document scope. Each agency gets its own assistant trained only on their SOPs, no generic drift. Survey engine auto-generates customised audit guidelines per agency from submitted responses, versioned, admin-approved, downloadable as compliance PDFs. Audit handling time down 45%, staff training ramp-up cut by ~50%. » Loan origination flow for a non-bank lender, lead to settlement, with a live three-way sync between the custom platform, HubSpot, and the origination system. Any status change propagates to all three without manual reconciliation. » AI email triage system on N8N, classifies support, sales, and job applications, generates branch-specific replies using separate prompt templates per category, logs to Airtable, posts Slack summaries. Architecture built for a multi-agent upgrade, classifier, responder, and auditor agents running independently with shared memory. » E-commerce: AI fraud detection for bulk orders, automated product description and meta ad generation, AI image and media creation, OpenAI, Gemini, and Claude running in production on a high-volume DTC platform. ✦ Stack: Laravel · PHP · Python · React · Node.js · LangChain · OpenAI · Claude · Gemini · RAG · Pinecone · FAISS · Weaviate · Filament · Laravel Nova · PostgreSQL · MySQL · Redis · Docker · AWS · GCP · Brightree · Redox · HubSpot · Twilio · N8N · Auth0 · ElevenLabs ✦ Compliance: HIPAA · HITECH · HITRUST · GDPR · SOC2 · OWASP · PCI DSS · CURES

✅ Top Rated Senior .Net developer & Full stack developer with extensive experience in ASP.Net, C#, .Net Core, EF, PHP, API's ✅ Have created web apps using Angular 2+, Vue.js, React.js & Redux, Wordpress, Wix, Squarespace. ✅ Built eCommerce stores on Shopify, Shopify Plus, Salesforce Commerce Cloud, Bigcommerce, and LightSpeed. ✅ Hands-on experience in building API's and Integrating various API's. ✅ Available to start immediately. 18+ yrs of development experience | Awesome Designs | Flawless Coding | High Conversion Rate | On Time | Quality Driven | Excellent Communication Skills | Round the Clock Availability | Product development | Leadership to drive results I create business grade web / mobile app solutions and strive to deliver software of brilliant quality using the SOLID principles, TDD approach, agile methods for rapid iteration. I'm a self-motivated professional with a strong work ethic and productive self-starter with success being a freelancer on Upwork. I'm a great team-player, have participated in multiple projects, joining large teams, effectively co-working with other professionals and I provide the following services - Web Applications development - .Net, C#, ASP.NET Core, MVC, Angular, Web API, JavaScript, JQuery, Knockout, Node JS, AJAX, Reactjs, Ruby on Rails and Razor. Mobile Applications development - iOS, Android, and Windows Phone via Xamarin (MVVM Cross and Xamarin Forms), React Native, Ionic and Flutter. Cloud Services - AWS and Azure. Desktop Applications development - C#, WCF Data services, MS Access, OData and Win Services. Microsoft SQL Server, Reporting Services, N-tier application design, ORM, LINQ, Entity Framework, MVVM, Silverlight, AJAX, K2 Blackpearl, SharePoint Development, Salesforce, SharePoint, ERP/RFID Listener services and Microsoft Dynamics CRM API Development: Amazon MWS/SP-API, Bigcommerce API, Zendesk API, Quickbooks API, Chargebee API, Recurly API, Shopify API, Ebay API, Walmart API, Wish API, Endicia API and Most Restful API's Project Management: I have worked with diversified teams and have managed to deliver high quality products. I have experience with various project management tools and issue or bug tracking tools. I have experience with waterfall model, agile and scrum project management models. Technical Project Management: I bring in a mix of technology and project management which makes me to monitor project progress and deliver high quality products. I am available to start immediately. Please leave me a message to discuss further. UI/UX --------- Angular Reactjs/Redux Bootstrap HTML, CSS Vue.js Bigcommerce Stencil, Shopify Liquid, Shopify Plus, Salesforce Commerce Cloud Programming ----------------- ASP.Net, VB.Net, C#, .Net core, MVC, Java, Entity Framework, JSon, MS Access, XML, Node.js, Java Scripts, Xamarin, Telerik, Kendo UI, Crystal Reports, PHP CMS/Frameworks: ------ Wordpress, Laravel, DotnetNuke, Umbraco, Squarespace, Wix, Contentful Databases ------------- SQL Server, MS Access, MY SQL, Cosmos DB, MongoDB, Dynamo DB, Oracle API's ------- Freshdesk APi, Zendesk API, Freshsales API, FreshMarketer API, Unbounce APi, Google docs API, Quickbooks APi, Adwords API, Shopify API, Bigcommerce API, Amazon MWS/SP-API, UPS API, Fedex API, DHL API, USPS API, eBay API, Most REST API's, Twilio API, Unbounce API, Sage API, Kronos API, OCAPI 3rd Controls: --------------- Telerik, KendoUI, AG-Grid, Material components, Reporting, Crystal reports Cloud -------- AWS, GCP, Azure, CI/CD Visualization Tools ---------------------- Power BI Search --------- Elastic Search, Apache Solr Identity --------- Amazon Cognito, Azure Active Directory, Okta, Auth0

I am a certified AWS Developer with over 10 years of working experience with AWS Cloud, who specializes in server-less architectures such as ETL processes, serverless APIs, serverless websites. ETL processes: - various compute environments: from EMR, via Glue, Batch, to Lambda with focus to be config driven and as serverless as possible. - custom orchestration systems with Step Functions, Scheduled Events, On-demand, queueing and post processing - Python, PySpark, NodeJS (with Typescript) APIs: - as serverless as possible to reduce cost and development time, with ability to deploy whole API service as single Lambda function (NestJS, FastifyJS, ExpresJS, FastAPI, Flask) - Python, NodeJS (with Typescript) Serverless websites: - as serverless as possible for reports about system status, small intake forms, management tools, etc. - build whole websites with static generated content, server site rendering (NuxtJS), - Python, NodeJS (with Typescript) I prefer to use Serverless Framework as IaaC (infrastructure as a code) for deployment with a connection with GitHub Actions as a pipeline. Also, I have experience with and I am open to use other deployment tools such as: AWS CDK, SAM, Terraform, etc. I also have experience designing DynamoDB tables (one table design principle) and connecting them with Lambdas as data producers, and creating DynamoDB Streams with Lambdas as event processors (which could've been useful in your project). Let's talk about your project needs and use my 10 years of working experience with AWS. Tomasz