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I have a Bachelor Degree in Program Software of Computer Facilities and Automated Systems from Siberian State University of Telecommunications and Information Sciences and a Degree Specialist for the same specialization from Novosibirsk Aircraft Technical College. I am a very experienced developer systems ecommerce (as well as corporate systems and other) with 10+ years of experience. I have worked using different technology on real projects in diverse areas of human activity and business domains. I have good knowledge of Software Development Life Cycle (SDLC) and Agile Methodology which helps in fast building “High-Tech” solutions for end users and results in low maintenance costs. I provide various services related to web development, crm development, database development and consultancy on software development and implementation of complex projects. If necessary, i is ready to help with to write functional and technical requirements. I thrive in unfamiliar situations and enjoy opportunities to learn and gain exposure to new ideas and experiences. I am open and willing to learn whatever is necessary to accomplish my client's goals. Thank you, I look forward to working with you.

2001-2006, BSc of Engineering from Satbayev University. Software Developer | Independent Researcher | Former Competitive Programmer | Author of the book titled "Computer Science Explained"

Full lifecycle: requirements analysis and architecture design through implementation, maintenance, and growth of SaaS products - so founders can focus on the business, not the build. For the past years I ran a crowdsourced logo design platform: 75,000 B2B clients, 14M logos, 99.9% uptime against a 99.75% SLA. At peak I led a team of 7 while remaining the primary engineer on core systems. Experienced with large production codebases without regressions - test coverage, migrations, and zero-downtime deployment. I onboard quickly into unfamiliar teams and projects. SKILLS System Design, Database Design, JavaScript, PHP, MySQL, Node, React, TypeScript, Redis, ElasticSearch, Docker, Ansible, PayPal integration, Nginx, PostgreSQL, Apache Kafka, Sphinx, Cloudflare, S3, SVG, LESS, jQuery, XSLT, Mocha, Selenium, Vite, TailwindCSS, A/B testing, PDF rendering. WORK HISTORY 2008 - 2026 Quinn Ventures Inc. Technical Lead and Software Engineer, working directly with the founder - a continuous Upwork engagement. Owned core architecture for all SaaS products and day-to-day engineering across multiple technology generations. Built and led a team of up to 7 (developers, system administrators, designers), scaling it up and down by project phase - hiring and onboarding, work breakdown, code review, and release planning while staying hands-on in the codebase. LogoTournament - a crowdsourced logo design platform: 75,000 B2B clients, 14M logos. Highlights: - Sustained 99.9% uptime against a 99.75% SLA across 18 years of continuous development - Migrated the platform through three infrastructure generations with zero downtime: storage (local → Rackspace → S3), search (Sphinx → ElasticSearch), plus two full front-end rebuilds - Payments: credit card and PayPal, multi-tier pricing, fraud protection - chargeback rate below 1% - Performance: Redis session and page caching; Kafka for delayed processing, notifications, analytics; Rate Limiting - Admin back-end with performance, statistics, and feedback tracking; sales history, tax, and payment-hold reporting - UI: Production A/B testing for new features, vector drawing and annotation tools, React-based admin back-end. - OpenAI integration for portfolio classification and contest brief analysis - Infrastructure: Ansible IaC, Cloudflare WAF, monitoring/alerting/backups, Mocha/Selenium functional tests Skills: MySQL, PHP, Redis, Apache Kafka, SVG, LESS, React, JavaScript, Docker, ElasticSearch, A/B testing, Sphinx, Node, Mocha, Selenium, Ansible, Ubuntu, Linux, OpenAI, S3 NameSampler - AI-powered SaaS for Quinn Ventures, a modern stack and LLM orchestration: React + TypeScript (Vite, Tailwind CSS), Node, OpenAI integration, deployed on Ubuntu. GUI orchestration of LLM prompts across 83 structured naming methodologies. Features: sorting, favorites, and on-the-fly domain availability checks. Internal product venture, sunset by the client. Skills: Nginx, React, TypeScript, Vite, Tailwind CSS, Node, OpenAI. PathJet - Productivity SPA for Quinn Ventures: Kanban board with integrated Pomodoro timer and productivity analytics. Built end-to-end - React front-end, PHP back-end. Internal product venture, sunset by the client. Skills: React, JavaScript, PHP, Node, Babel, ES6, PostgreSQL Plus numerous other products over the years. The engagement concluded in June 2026, when AI image generation made the LogoTournament business model obsolete. Reference available from Tyler Quinn, CEO, Quinn Ventures Inc. (Canada). EARLIER EXPERIENCE (2003 - 2013) 99znakov (discontinued) Daily Commute Carpooling & Dating Platform. A two-sided marketplace matching drivers and passengers on overlapping daily routes via geo and time analysis. Features: SMS API integration, in-app chat, social user profiles, content moderation, and a community forum. Role: Founder, lead developer, and project manager; team of 3. Skills: PostgreSQL, PHP, Zend, JavaScript, jQuery, Sockets, Android WebView app Online stock trading system - Core architecture, database schema, and optimization for a multi-server trading platform: bank offer submission, AJAX market indexes, inline editing, dynamic XSLT, subscriptions, and a custom Win32 trading browser with technical analysis (EMA, SMA, RSI). Arabic language support. Long-term Upwork engagement. Skills: Sockets, AJAX, XSLT, PostgreSQL, PHP. Role: Lead developer and project manager, team of 4. Sports league management system - League, facility, player, and team management with manual and automatic game scheduling, contract and time-slot operations, and CSV reporting. Role: PHP middle developer in a team. Automated car park software - Operator console, billing with multiple tariff plans, photo/video capture, magnetic card reader and controller programming. Role: UI, database design, and billing; startup team of 3. PERSONAL SIDE PROJECT Reverse-engineered and modified the China-market infotainment system of a 2020-2023 Chevrolet Equinox ADDITIONAL PADI licensed diver.

As a seasoned professional with 20 years of experience in back-end development and 7 years in machine learning, I have a proven track record of building high-quality, scalable web applications, APIs, and AI solutions. I am proficient in both front-end and back-end development, leveraging a wide array of technologies to deliver seamless user experiences, robust server-side solutions, and advanced machine learning models. WEB DEVELOPMENT Back-End: Building robust server-side logic with Django, FastAPI, and Flask. Full Stack: Seamlessly integrating front-end and back-end technologies for comprehensive solutions. API DEVELOPMENT RESTful APIs: Designing and implementing APIs with Django REST Framework. Microservices: Developing scalable microservices using Flask and FastAPI. Data Management: Utilizing SQLAlchemy and Alembic for efficient database interactions. Data Validation: Ensuring data integrity with Pydantic. DATABASE DEVELOPMENT Relational Databases: Designing and managing schemas in PostgreSQL. Analytical Databases: Implementing high-performance data storage solutions with Clickhouse. GUI DEVELOPMENT Desktop Applications: Creating user-friendly desktop applications using Qt/PyQt. AUTOMATION AND BOTS Telegram Bots: Developing bots for various purposes on the Telegram platform. Console Utilities: Automating text manipulation, email handling, image processing, and other routine tasks. MACHINE LEARNING & DEEP LEARNING Model Development: Design, train, and optimize machine learning and deep learning models. Frameworks: Proficient with TensorFlow, PyTorch, Keras, Scikit-learn. Hyperparameter Tuning: Expert in techniques to improve model performance. COMPUTER VISION Image Processing: Object detection, image classification, segmentation. Libraries: OpenCV, YOLO, SSD, Mask R-CNN. NATURAL LANGUAGE PROCESSING (NLP) Text Analysis: Sentiment analysis, text summarization, named entity recognition. Tools: NLTK, SpaCy, BERT, GPT, Transformers. RECOMMENDER SYSTEMS Personalization: Collaborative filtering, content-based filtering, hybrid methods. Implementation: Building recommendation engines to enhance user experience. DATA ENGINEERING Workflow Orchestration: Apache Airflow, dbt. Data Management: Clickhouse, Metabase, Apache Nifi. ETL Processes: Extract, transform, load workflows for data warehousing. Data Preparation and Exploratory Data Analysis (EDA) Data Cleaning: Handling missing values, outlier detection. Visualization: Creating insightful visualizations using Matplotlib, Seaborn, Plotly. Statistical Analysis: Descriptive statistics, hypothesis testing. MODEL DEPLOYMENT Deployment Platforms: AWS SageMaker, Google AI Platform, Azure ML. Frameworks: Flask, FastAPI, Starlite. Containerization: Docker, Kubernetes for scalable deployment solutions. ADDITIONAL SKILLS Programming Languages: Python, TypeScript, SQL, C++, Rust, JavaScript. Web Frameworks: Django, Flask, FastAPI, React. ORM: SQLAlchemy. Migrations: Alembic. Data Validation: Pydantic. Version Control: Git, GitHub, GitLab. DevOps: Docker for containerization and orchestration. PROFESSIONAL ATTRIBUTES Strong problem-solving skills with an analytical mindset and a passion for clean, efficient code. Excellent communication, teamwork, and collaboration abilities. Commitment to continuous learning and staying updated with the latest advancements in both web development and AI/ML technologies.

Dear Hiring Manager, welcome to my profile. 🏆 Top Rated Senior Full-Stack WordPress & WooCommerce Expert With 10+ years of experience and 1000+ projects completed, I focus on results — not just code. I help businesses fix, optimize, and scale WordPress websites — fast and reliably. Main expertise: ✔ Fix critical bugs and errors (24–48h) ✔ WooCommerce checkout & payment issues (prevent lost sales) ✔ Figma to WordPress (pixel-perfect, fast, responsive) ✔ Custom development (ACF Pro, custom themes, custom plugins) ✔ Builders Expert (Elementor/WP Backery/Divi...) ✔ Plugin setup, customization themes, and conflict resolution ✔ Speed optimization (Google PageSpeed 85–95+) ✔ REST API and AI integrations (OpenAI / ChatGPT) I am very fond of responsive web development, as I am fond of projects online stores if you need someone who will bring to the end of this work, please contact me. For me is important to perform quality work for the client, and not less important to satisfy the customer order and made him satisfied. When I’m working on a project, I don’t want just to meet deadlines. Rather, I prefer to complete the project well ahead of schedule. Why choose me: ✔ Save your time with fast and accurate solutions ✔ Long-term support after ending contract ✔ Fast responses and reliable communication Selected projects: ✔ Long-term WordPress development – $11,000+ ✔ Custom WooCommerce solutions – $3,000+ ✔ Ongoing support & improvements – $1,500+ Many of my clients come back because I solve problems quickly and keep their websites running smoothly. ⚙ Deeper ⚙️ ⚙️ Backend Stack: Have extensive experience with: - PHP 7.x/8.x | OOP | MVC | SOLID | Design Patterns - REST API | GraphQL | SOAP | XML | JSON | cURL | Webhooks - Apache | Nginx | Linux | cPanel | Plesk - MySQL | MariaDB | PostgreSQL | MongoDB | NoSQL | SQLite - Redis | Memcached | RabbitMQ | Queue Systems - Composer | WP-CLI | Cron Jobs - Git | GitHub | GitLab | Bitbucket | SVN - Docker | CI/CD | Agile - JWT | OAuth | OAuth2 | API Integrations 💻 Frontend Stack: - HTML5 | CSS3 | SCSS | SASS | JavaScript (ES6+) | TypeScript - jQuery | AJAX | JSON | Fetch API | Axios - Vue.js | Vuex | Nuxt.js | Vuetify | Quasar | Vuely - Angular | Backbone.js | React - Bootstrap | Tailwind CSS | BEM - Pixel Perfect | Responsive Design | Mobile First - Cross-Browser Compatibility | Retina Ready - WCAG 2.1 Accessibility Standards | W3C Standards - Figma | Adobe XD | PSD | AI | Sketch to HTML/WordPress - CSS Animations | SVG | Canvas 🌐 WordPress Stack: Custom Theme Development | Custom Plugin Development | WordPress REST API | Gutenberg Block Development | WordPress Multisite | WP-CLI | Custom Post Types (CPT) | Custom Taxonomies | ACF Pro | Meta Box | Shortcodes | Widgets | Hooks (Actions & Filters) | Child Themes | Theme Customizer | Template Overrides | Multilingual Websites | Headless WordPress 🎨 Themes: Astra | GeneratePress | Kadence | Divi | Avada | Flatsome (UX Builder) | WoodMart | Porto | OceanWP | Hello Elementor | Betheme | Enfold | Bridge | Salient | Newspaper | The7 | X Theme | Jupiter | Impreza | Uncode | Custom Themes 🧱 Page Builders: Elementor | Elementor Pro | Beaver Builder | Divi Builder | WPBakery | Gutenberg | Bricks Builder | Thrive Architect | Visual Composer | UX Builder (Flatsome) 📝 Forms: Gravity Forms | WPForms | CF7 | Ninja Forms | Fluent Forms | Formidable Forms | Everest Forms | Caldera Forms | Quform 🛒 WooCommerce: Custom Checkout | Custom Payment Gateways | Shipping Methods | Subscriptions | Bookings | Memberships | Product Add-ons | Dynamic Pricing | Composite Products | Variable Products | Store API | HPOS Compatibility 🔍 SEO: Yoast SEO | Rank Math | All in One SEO | Schema Markup | Rich Snippets | XML Sitemap | Open Graph | Core Web Vitals ⚡ Performance: WP Rocket | LiteSpeed Cache | W3 Total Cache | FlyingPress | Perfmatters | Asset Cleanup | Redis Cache | CDN Integration | Cloudflare | Image Optimization | Lazy Loading 🛡️ Security: Wordfence | Sucuri | iThemes Security | Malware Removal | Hardening | SSL | reCAPTCHA 📧 Email & Marketing: Mailchimp | Brevo (Sendinblue) | Klaviyo | ActiveCampaign | MailPoet | Constant Contact | Campaign Monitor | ConvertKit | MailerLite | HubSpot | Mailgun | SendGrid | Amazon SES | SMTP Configuration 🔌 Integrations & APIs: Stripe | PayPal | Authorize.Net | Square | Braintree | Mollie | Google Sheets | Google Maps API | Google Analytics | Google Tag Manager | Google Merchant Center | Facebook Pixel | Meta Conversions API | Zapier | Calendly | Twilio 🔄 Migration & Maintenance: Website Migration | Database Migration | Backup & Restore | Staging Environments | Version Upgrades | Plugin Conflict Resolution | Bug Fixing | Security Audits | Malware Cleanup 🤖 Data & Automation: CSV/XML Import & Export | Web Scraping | Data Parsers | Custom Parsers | Feed Generation | API Sync 🏗️ CMS & Frameworks: WordPress | Laravel | Symfony | Drupal | Bitrix | Yii | OpenCart | Shopify | Smarty

As a senior full-stack solution architect with over 30 years of experience, my focus is on building and modernizing the mission-critical SCADA and real-time data systems that keep cities warm and grids stable. My focus is on absolute reliability and creating systems that run 24/7 at a national scale, because I know that in the real world, failure is not an option. While I'm fluent across the full stack, my true value is in my architectural approach. I excel at diving into complex, chaotic legacy systems, finding the core failure points, and engineering robust, scalable solutions that last for a decade, not just a single sprint. Career Highlights & Results: Proven SCADA Reliability: * Architected and deployed multilingual SCADA systems for national-level utility providers (Kazakhtelecom, Vodokanal, TPP-3) that operated 24/7 for over 8 years without critical failures. *High-Throughput Architecture: Designed a multi-node Erlang “Faceplate” replica capable of processing 120,000+ data points/sec across a 6+1 node cluster, ensuring horizontal scalability. *AI-Powered Automation: Built a "Dispatcher Assistant" using Python + LLM (RAG) that transforms raw system alarms into clear, step-by-step actions, reducing operator response time by an estimated 5x. Full-Cycle Product Development: * Single-handedly designed, developed, and deployed a 50,000+ line document management system from scratch, which became a core business asset for the company. * Complex Algorithm & Integration: - Created a near-O(1) loop detection algorithm for 9,000+ node graphs - Developed a C#/OLE bridge to automate critical workflows, eliminating sources of human error. Core Skills & Expertise: * System Architecture & Modernization: - Proven experience in transforming legacy monoliths into modular, real-time architectures. * High-Performance Backends: Building and scaling systems that handle high-throughput data (100k+ points/sec) with a focus on fault tolerance. * AI & LLM Integration: Practical experience developing AI-powered assistants (RAG) to solve real-world operational problems. * Complex Algorithm Development: Designing and implementing custom logic for graph analysis, routing, and control logic. Core Technologies: Delphi, C#, .NET, Erlang/OTP, Python, Ruby, MQTT, OPC UA, IEC-104, MSSQL, PostgreSQL. If you’re building or modernizing a critical infrastructure system—especially with real-time data, complex integration, or AI-in-the-loop—let’s talk.