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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.

Greetings! I'm a senior web developer and certified java programmer with 20+ years of experience incorporating user and business requirements into cost-effective, secure and user-friendly solutions. I have a strong background in IT, Manufacturing & Business Process Automation, Neural Networks. I'm currently focused on full-stack software development, building projects from ground up. Technology Summary Java, J2EE, JavaScript, HTML5, Node.js, MongoDB, SQL, Linux, AWS, C++, Rust, AngularJS, React

Worked for Touchstone, Symantec, Acronis. Let my 20 years of software engineering experience work for you! ✅ Strong knowledge in C/C++, assembler x86/x64, STL, Boost; ✅ Author of a number of DirectShow codecs, renderers, muxer and transform filters; ✅ Author of a number of Media Foundation (MF) components; ✅ Author of a number of kernel-mode drivers for Windows; ✅ Reverse engineering skills, low-level programming, disassembling; ✅ DLL injection, patching code on-the-fly, creating self-modifying code; ✅ Creating high-performance network services / win32 services; ✅ Creating lexical analyzers and grammar parsers on Flex and Bizon; ✅ AMQP clients, RabbitMQ / zeromq (0mq) Projects in which I participated: ************************************** 📝 Acronis Backup Cloud, from 2014 to 2017: backup of data on-premises, in remote locations, in private and public clouds. Lead Software Architect. Infrastructure team. 📝 REX video surveillance system (Reflexor Software), from 2013 to 2014: VMS system (video monitoring system). Lead Software Architect. Author of Win32 services, video player plugin for browser, IP camera discovery bots, WEB camera recorders and translation over the network 📝 Ewclid CCTV (ComCom Electronics), from 2004 to 2013: professional video surveillance system. Lead Software Architect, author of a number of DirectShow filters, network streaming protocol, security subsystem 📝 PC diagnostic utilities PCIScope (PCI viewer), ACPIScope (ACPI viewer), DMIScope (DMI viewer), USB enablers for UHCI and OHCI controllers (APSoft), from 2002 to 2004: diagnostic software for Window 2000/XP. Author of idea. Author of kernel-mode drivers. 📝 EasiDock 1000EV/5000 driver pack (Mobility Electronics), from 2000 to 2002: devices based on alternative to PCI-E technology - SplitBridge technology. Author of kernel-mode drivers for COM/LPT/PS2 ports and network card (Window 98/ME/2000/XP) 📝 CheckIt by TouchStone Software, from 1998 to 2000: diagnostic software package helps users identify the cause of PC problems and make repairs. Author of driver for performing hardware tests at run time 📝 CardWare for Windows NT 4.0 (Award Software), from 1995 to 1998: Complete solution for hot-swap support of PC Cards. Developmnebt of Kernel mode drivers. Author of PCDrvM driver which allows hot-swapping of network and SCSI PC cards