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Mateusz Kimont
● Available for B2B Contracts, Part-Time & Full-Time Remote

Mateusz Kimont

Principal Full-Stack Engineer & AI Automation Architect

10+ Years Architecting High-Volume E-Commerce, FinTech/Insurance & Healthcare Systems + AI, WhatsApp & n8n Workflow Automation

Languages: EN (Fluent), PL (Native), ES (Fluent)
Systems: Linux User Since 2000 • INTJ Architect

Executive Profile & Quantified Impact

Battle-tested Principal Full-Stack Engineer and Systems Architect with 10+ years of senior commercial experience delivering high-velocity web platforms, legacy modernizations, cloud infrastructure, and intelligent AI/workflow automations across the US, UK, EU, and international markets.

$1M+ Value React Self-Service Platform (Wine.com)
40M+ Txns/Yr Cross-Platform Payment Wrappers (£45M+ T/O)
2x–20x Faster PHP 8.3 & AWS Overhaul / 4s → 200ms Speedup
£250k+ Year-1 Bespoke 3D Printing CMS (Built 100% Solo)
24/7 AI & n8n WhatsApp Bots, RAG Agents & CRM Automation
  • High-Volume Self-Service & E-Commerce ($1M+): Architected a modern React & TypeScript corporate gifting application integrated into a massive legacy Backbone.js platform at Wine.com, plus 10+ years acting as Full-Stack & DevOps Engineer for a £1M+ UK e-commerce business.
  • AI & Business Workflow Automation: Design and deploy 24/7 WhatsApp Business API chatbots, custom LLM/RAG knowledge assistants, Model Context Protocol (MCP) tools, and self-hosted/cloud n8n & Make pipelines that eliminate manual support and data entry.
  • Bespoke Product Engineering: Solo-architected a complete 3D personalized product Printing CMS with 125+ configuration fields, 1-click photo/CSV batch order processing, and 0.3s FCP | 0.8s LCP speed scores.
  • Enterprise QA & Analytics at Scale: Built a headless automated testing cluster (Linux, Ansible IaC, Jenkins, Webdriver.io/Playwright) and full-scale Google Analytics / GTM Enhanced Ecommerce across 16 complex JS insurance applications.

Core Technical Competencies

AI, Chatbots & Automation
n8n (Self-Hosted Docker & Cloud), WhatsApp Business Cloud API, Twilio, Make.com, OpenAI / Claude / Gemini APIs, RAG & Vector Databases (pgvector, Pinecone), Model Context Protocol (MCP), Custom Webhooks, Automated CSV/XLS/PDF Parsing, Multi-Language Bots (EN/PL/ES).
Backend Development
PHP 5/7/8.3 (Strict OOP & Functional), Symfony 5–7, Laravel, Node.js, Express.js, Zend/Laminas, CraftCMS, SlimPHP, CodeIgniter, WordPress & WooCommerce (Custom Plugins, Themes, Headless REST API, WP-CLI), Composer, The PHP League, Doctrine ORM, RabbitMQ, Psalm, PHPStan, PHPCS, Rector.
Frontend Development
React, TypeScript, Vue.js 3.5, JavaScript (ES6+ / Vanilla), TanStack Query, SWR, Angular, Legacy Frameworks (Backbone.js, Marionette, Ember, Handlebars, jQuery), HTML5, CSS3, SCSS/Sass, Tailwind, Material, Bootstrap, Canvas 3D API, GreenSock (GSAP), D3.js, Chart.js, Vite, Webpack, Gulp.
Databases & Caching
MySQL (InnoDB Cluster, Query Optimization, Indexing), PostgreSQL, MSSQL, MongoDB, Cassandra, Firebase, Couchbase, Redis (Session & Cache Patterns), Memcached, Doctrine 1st & 2nd Level Caching, HTTP Cache Headers, Sharding, CQRS, Event Sourcing, DDD / Hexagonal Architecture.
Cloud, DevOps & SRE
AWS (S3, CloudFront, EC2, RDS), GCP, Azure, DigitalOcean, Cloudflare, Fastly, Docker, Docker Compose, Kubernetes, Ansible (IaC), Terraform, Jenkins, GitHub Actions, Buildkite, LaunchDarkly, OpenLiteSpeed, Nginx, Apache, Traefik, Bash, Python, Makefile, Linux (Debian/Ubuntu/RedHat/CentOS since 2000).
QA, Observability & SEO
Playwright, Cypress, Webdriver.io, Selenium, Jest, React Testing Library, Mocha, PHPUnit, BlazeMeter (Load Testing), Datadog, New Relic, ELK Stack (Elasticsearch, Logstash, Kibana), Prometheus, Grafana, Rollbar, GTM, Google Analytics, Enhanced Ecommerce, Core Web Vitals, OWASP Security (CSP/CORS/HSTS).

Professional Career History

Senior React / Principal Full-Stack Engineer & AI Automation Consultant

Wine.com & B2B Client Contracts (Remote)
07/2025 – Present
  • $1M+ Self-Service Platform: Architected and developed a high-impact React & TypeScript self-service corporate gifting web application for a major US e-commerce platform (Wine.com), projected to generate over $1M+ in value by reducing manual support overhead.
  • Legacy Enterprise Integration: Engineered the seamless integration of the modern React application into a complex, large-scale legacy Backbone.js e-commerce system.
  • DevEx & Observability Overhaul: Overhauled the local Docker development environment by optimizing build configurations to drastically reduce build times, alongside integrating advanced stack tracing and performance dashboards.
  • AI & Workflow Automation (B2B): Architect bespoke n8n workflow pipelines, WhatsApp Business API chatbots, RAG knowledge assistants, and MCP integrations for commercial clients.

Principal / Senior PHP Full-Stack Engineer

CMO Group — CMO Superstores Ltd (UK)
11/2024 – 06/2025
  • 2x Site Performance Overhaul: Increased the load speed of primary production e-commerce store sites by over 100% (2x faster) through strategic SQL database query optimization, RESTful API enhancements, and a complete redesign of the AWS cloud architecture.
  • Core Stack Modernization: Spearheaded the seamless transition of the entire codebase from PHP 7.3 to PHP 8.3, improving runtime performance and future-proofing the application stack.
  • Payment Security & Velocity: Re-engineered the core payment processing wrapper to improve transactional integrity and strengthened application security defenses; drove bug resolution and comprehensive documentation standards.

Lead Application & Product Engineer

Charlesworth Press (UK) — mkimont.github.io/projects/printing-cms
09/2020 – 04/2024 (3.5+ Years)
  • Bespoke Printing CMS (£250k+ Est. Year-1 Value): Independently conceived, architected, and built from scratch a full-scale web platform for customizing notebooks, books, planners, cards, and mugs with 125+ configuration fields.
  • Automation & 3D Visualization: Engineered 1-click photo-to-live-product generation, interactive 3D Canvas previews (with mobile touch support), XLS/CSV batch order generation, and automated Google Drive synchronization.
  • Sub-Second Core Web Vitals: Achieved 0.3s FCP | 0.8s LCP | 1.0 SI utilizing WooCommerce/WordPress custom architecture, AWS S3 + CloudFront, OpenLiteSpeed, GhostScript, and JSON/transient DB optimization.

Software Analyst & Full-Stack Developer (Contract)

RLDatix (International Healthcare Software — UK, Saudi Arabia, Canada, Australia)
09/2020 – 03/2021
  • 20x Speed Optimization (4s → 200ms): Reduced site loading times from 4 seconds down to 200ms, saving ~0.6 hours per day per developer (~8 hours of engineering time saved daily across the team).
  • Engineering Process & Architecture Docs: Established a Jira Scrum process for all developers, introduced a Git code-review workflow, authored "CLI man pages" in Git for every project, and created multi-server data-flow diagrams and RESTful API documentation.
  • Internationalization & Bug Resolution: Resolved long-standing mission-critical bugs, including backporting Angular and jQuery calendars to support Arabic localization.

Senior Full-Stack Web Developer, QA Lead & SEO Lead

The Insurance Emporium (theinsuranceemporium.co.uk — UK)
08/2016 – 07/2020 (4 Years)
  • Customer Portal Lead: Headed frontend development for the external customer self-service portal (portal.theinsuranceemporium.co.uk) and maintained 10 main production sites using PHP 7 (Symfony, Laravel, Zend), Backbone/Marionette, Ember, and MySQL.
  • £45M+ Payment Gateway Compliance: Updated cross-platform payment wrappers and ensured full 3D Secure compliance for £45m+ annual turnover (40M+ transactions/year).
  • Headless QA Testing Cluster: Designed and deployed custom headless automated testing servers (Linux, Ansible, Docker, Jenkins, Webdriver.io) covering 16 desktop and mobile insurance quote applications with automated console error and screenshot reporting.
  • SEO & Analytics Lead: Implemented Google Enhanced Ecommerce, Google Tag Manager (GTM), and Hotjar across 16 applications, achieving a 99% Google PageSpeed/SEO score.

Senior & Mid Full-Stack Web Developer (Digital Agencies)

We Are Marvellous (2016) • Grapple (2015–2016) • Xanda (2014–2015) — London / UK
10/2014 – 07/2016 (2 Years)
  • Delivered pixel-perfect, responsive websites, custom WordPress/WooCommerce/Magento themes & plugins, and bespoke PHP frameworks for 16+ major clients including BNP Paribas Real Estate, Northern Gas Networks, Ultravilla, Luxury Flooring, Brakspear, The Manufacturer, and Zerodegrees (Awwwards Winner).
  • Tech Stack: PHP OO, WordPress, Magento, Perch, JavaScript (Vanilla/jQuery), SASS/LESS, Gulp/Grunt/Browserify, Node.js, MySQL, Ansible, Vagrant, NGINX, Apache.

Earlier Web Development & DTP Career

University of Warmia & Mazury (2008–2009) • Canal+ (2008)
05/2008 – 11/2009
  • Canal+ (Mid Web Developer): Refactored high-traffic media websites using OOP PHP, CSS, HTML, and AJAX; improved UX/UI and technical SEO.
  • University of Warmia & Mazury (Promotion & Advertising Dept): Full-stack web developer (PHP, MySQL, JS) and Desktop Publishing (DTP) designer for university newspapers, flyers, and print publications. (2009–2014: relocated to London, UK and mastered fluent English).

Education & Academic Foundation

  • Computer Science (2007–2008) — Nicolaus Copernicus University, Toruń (Algorithms, Data Structures, Discrete Math, C/C++/C#, OS, Computer Networks).
  • Philosophy (2006–2009) — University of Warmia & Mazury, Olsztyn (Logic, Ancient Languages, History of Philosophy).
  • Fine Arts (2006–2007) — University of Warmia & Mazury, Olsztyn (Graphic Design, Visual Structure, Photography, Computer Graphics).
  • IT Technician (ISCED 4 Diploma) (2003–2006) — Post-Secondary School, Lidzbark Warmiński (Database & Software Design, C++, Networks, OS).

Awards, Certifications & Interests

  • 🏆 Awwwards Honorable Mention: Zerodegrees interactive microbrewery web experience & animation.
  • 📜 Microsoft Specialist Certified: Programming in HTML5 with JavaScript and CSS3.
  • 📜 Certified Agile & Scrum Practitioner + 72% Adobe Photoshop Expert Certification.
  • ⚙️ Beyond 9-to-5: DevOps & Full-Stack Engineer for a £1M+ UK e-commerce business (10+ years); home-lab Linux server admin (Linux user since 2000); father of two; classic FPS (Quake) & Honda CBR motorcycle enthusiast.