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Full-stack software craftsman and technical leader with over 15 years of experience. Equally adept at system design, programming, technical leadership, mentorship, and business collaboration. Have a wide breadth of technical experience, but specialize in backend API development, relational databases, and web applications. Passionate about simplicity and efficiency. I have worked at over a dozen companies large and small, in a handful of different domains. Also participated in hundreds of interviews, about half-and-half as the interviewer and the interviewee. I have given dozens of talks and training sessions on a variety of topics, mostly focusing on distributed systems, caching, and testing. My top skills are Java, SQL, testing, and refactoring. I have experience with formal academic and professional mentorship, and would love to help you skill up, solve a problem, or just nerd out with you today!
I am an adept **Full Stack Software Engineer and Architect** and with a wealth of experience in frontend, backend, and Data Structures and Algorithms (DSA) solution development. My expertise spans **clean architecture, TDD(test driven development), code reviews, debugging, and profiling**, enabling the delivery of high-quality solutions within constrained short timeframes. I have worked and collaborated with numerous prominent global blue chip corporations, startups, and international clients. Additionally, have made substantial contributions to Pluralsight and Stack Overflow, boasting a reputation exceeding 37k+ and ranking within the top 0.30% of users on the latter platform. Motto: Full refund in case of no help. Discounts: - Student discount is applied automatically. • Senior software engineer, have worked as a Subject Matter Expert and lead with the primary role to develop features, solve complex bugs, architecture refinements, feature integration, and development. • I intent to deliver a top-quality experience by delivering the most optimal solutions and guidance to enlighten the learners. • I have helped many developers to fix critical bugs and implement complex features on the Codementor platform. • Teaching is one of passing and I have helped numerous mentees on their journey to become successful developers in various fields such as web, native mobile, and big data. • I have expertise in curating and simplifying the content to deliver the best experience with different analogies. • I am deft at feature implementation, debugging, and refactoring. If you have any questions, Feel free to reach out, looking forward to meeting you.
Is your AI-powered MVP built on a fragile 'vibe-coded' foundation? Are you struggling to scale a prototype that was built with lightning speed but is now plagued by bugs, security holes, and technical debt? I transform brittle AI prototypes into robust, **production-ready applications**. As a senior AI engineer specializing in the **Node.js** and **React** ecosystem, I bridge the gap between rapid, AI-assisted development and the disciplined engineering required for scalable, secure software. But robust software is only half the battle. The other half is making it *work for your business*. I design and implement **intelligent automation workflows** that connect your apps, eliminate manual tasks, and free up your team to focus on high-impact work. Whether you need to rescue a failing project, automate a core business process, or build a scalable MVP from the ground up, I provide the expert oversight to ensure your AI initiatives deliver real, measurable value. **My Core Services:** * **🤖 AI Code Rescue & Remediation:** I conduct deep **AI code audits** to debug, refactor, and secure fragile codebases (especially those built with LangChain.js). I turn unmaintainable prototypes into stable, scalable assets ready for real users. * **⚙️ Intelligent Workflow Automation & Integration:** I design and build digital assembly lines for your business. I offer a full spectrum of automation solutions: * **Rapid Integration:** Using **Zapier, Make.com & n8n** to connect your existing tools and solve immediate process bottlenecks. * **Custom API Development:** Building custom **Node.js** APIs and webhooks to connect proprietary systems or handle complex logic that no-code tools can't. * **AI-Powered Decisions:** Infusing your workflows with intelligence using the **OpenAI API** to triage support tickets, qualify sales leads, or generate content automatically. * **🚀 Custom AI Solution Development:** I architect and build bespoke AI solutions from scratch, from **Custom GPTs** and intelligent **AI Agents** to complex RAG (Retrieval-Augmented Generation) pipelines that leverage your private data. * **👨🏫 AI Engineer & Career Mentorship:** I provide 1-on-1 coaching to help developers navigate the AI landscape, master tools like LangChain.js, and build a successful career in AI engineering and automation. **My Tech Stack:** * **Languages:** Node.js, TypeScript, JavaScript * **Frameworks:** React, Next.js, Express.js, NestJS * **AI / LLM:** LangChain.js, OpenAI API, LlamaIndex, Vector Databases (Pinecone, Qdrant) * **Automation Platforms:** Zapier, Make.com, n8n Ready to move past the prototype phase and build a real business? **Send me a message with your project details or book a session to get started.** --- ### Service Packages * **Package 1: AI Code Audit & Production-Ready Roadmap** * **Description:** Have an AI-generated MVP that feels unstable? I'll perform a comprehensive review of your codebase. You'll receive a detailed report identifying security vulnerabilities, performance bottlenecks, and a concrete, actionable roadmap to make your application **production-ready**. This is the perfect first step to de-risk your project. * **Package 2: Intelligent Automation Workflow** * **Description:** Let's put a core business process on autopilot. We'll map out a high-impact workflow and I'll build a robust automation to solve it. Ideal for **automating lead qualification**, **triaging customer support tickets**, or **streamlining content pipelines** using the best tool for the job—Zapier, Make, or custom Node.js scripts. * **Package 3: Scalable AI MVP Development** * **Description:** Need to build an MVP the *right* way? I'll architect and develop a **scalable MVP** from day one, using professional, spec-driven development practices. We'll build a strong foundation with clean, documented code and a modern stack (Node.js, React) to avoid the technical debt that plagues "vibe-coded" projects.
Microsoft AI Certified and Innovative Applications Architect with 8+ years of IT experience and extensive knowledge on Designing, Architecting, Developing, Deploying and Testing well versed technical solutions using C++, C#, [ASP.NET](http://asp.net/), .NET Core, .NET 5/6/7/8, Angular, Angular JS, JavaScript, JQuery, HTML5, CSS3, SASS, IONIC 5, T-SQL.
I build software solutions for aerospace and robotics industry ranging from building high fidelity dynamics engine software for mars and lunar landing, docking of satellites to deployment of robotic manipulators in space to building software tools for cyber physical systems ranging from rovers, leg-based robots to aerial vehicles e.g. coaxial helicopters and drones with experience in both low level and high level design. I am also a mentor and I love programming and I love teaching especially programming with C/C++ and Python, Design patterns, Data structures and Algorithms. I love taking on new problems and help solving the problems through systematic approach which is scalable in nature. Through mentoring, I get the opportunity to accelerate my own learning curve by constantly challenging my self with problems from different domains and keep myself up to date with current trends in software design. I believe the best way I can contribute to a better society by sharing my knowledge to others and hope they can build upon that. I always find programming to be much more than learning syntax of a language, its more of an art. Give me an opportunity and I will teach you the art of producing high quality functional codes
Summary ------- A seasoned Mobile Engineer with over **15 years** of hands-on experience designing and building robust, scalable mobile applications and solutions across **Android, iOS, Flutter, React Native, and Kotlin Multiplatform**. My work blends deep technical expertise with strong software craftsmanship. I design clean, **modular architectures** that balance performance, maintainability, and scalability, focusing on building robust and adaptable solutions—whether native or cross-platform. I bring a system-level perspective — from designing API contracts and optimizing performance to ensuring smooth integration with back-end and hardware layers. I’m committed to using **Clean Architecture**, **SOLID principles**, and proven **Design patterns** to deliver sustainable, high-quality engineering outcomes. Skills ------ > **Flutter Development - 6+ years** > Dart, Flutter, State management, Drift, gRPC, Protobuff, REST, Firebase, Supabase, Dart Frog, Flutter-Fullstack Development > **Android Development - 12+ years** > Kotlin, Android, Jetpack Compose/Libraries, Coroutines, Flows, Retrofit, Room, Hilt > **React Native - 3+ years** > Typescript, React Native, Expo, Zustand, SQLite, Realm, AsyncStorage > **iOS Development - 6+ years** > Swift, SwiftUI, CoreData, combine > **Kotlin Multiplatform - 2+ years** > Android, iOS, Compose-UI, Ktor, Room, Serialization, Koin > **Web Development - 3+ years** > Next.js, Typescript, Tailwind, Shadcn, Vercel > **Architecture** - Clean Architecture, OOAD/UML, SOLID Principles, Design Patterns > **Dev-ops Tools** - GIT, Github, CI/CD, JIRA, Confluence, Figma, Codecov, Sentry, Zeplin Specialties ----------- 🚀 Product Development | Technology Roadmap | Architecture 👨💻 Team Management | Leadership | Mentor
👋 Hi, I’m Denys, a Lead Software Engineer & Architect with nearly 10 years of experience designing scalable, high‑performance systems. I specialize in microservices architecture, system modernization, and cloud‑native solutions on Azure. I mentor developers at every stage: Junior devs get hands‑on guidance with clean architecture, SOLID principles, unit testing and their first cloud deployments. Mid‑level engineers dive into event‑driven and asynchronous patterns, performance profiling, caching strategies, and CI/CD pipelines. Senior engineers and aspiring architects work on strategic domain modeling, large‑scale refactoring, migration roadmaps, and leadership skills for driving innovation. Whether it’s code reviews, pair programming, design workshops or leadership coaching, I’ll share practical insights and real‑world examples to help you build robust, maintainable systems—and grow your career. Let’s build something great together! 🚀
### About me I’m a **Staff-level Frontend and UI Engineer** with **13+ years of combined professional and teaching experience**, specializing in **UI engineering**: Design Systems, enterprise CSS, responsive layouts, accessibility (WCAG), data visualization, and web animations — with deep expertise in **React, JavaScript/TypeScript, HTML, and CSS**. Throughout my career, I’ve consistently operated as **the bridge between Design and Engineering**, translating ambitious visual and UX goals into **scalable, performant, and accessible frontend systems**. My work focuses on aligning design intent with real-world engineering constraints while maintaining long-term maintainability and code quality. I’ve led and contributed to **Design System initiatives**, built **data-visualization–heavy charts, tables, and UIs**, improved **localization workflows**, and helped raise **UI standards across critical user flows** in large, high-impact products. A recurring part of my work involves **untangling legacy stylesheets** and transforming them into **clean, enterprise-grade CSS and component architectures**. In addition to hands-on engineering, I bring **5.5 years of experience as a Udacity mentor**, where I guided developers through frontend, UI, and JavaScript projects, reviewed real-world codebases, and helped engineers progress from fundamentals to **production-ready practices**. I mentor because I enjoy helping developers move beyond surface-level fixes and truly understand **why UI breaks** — whether it’s layout mechanics, rendering behavior, accessibility pitfalls, or component design.
I’m a backend .NET developer with 7 years of experience in SCRUM, Azure DevOps, Git, .NET and C#. I strive to be a trusted reference in development and software design, sharing best practices and driving the creation of robust, scalable solutions.
I'm a full stack software engineer, technical writer and computer science educator. I enjoy testing, debugging, refactoring, application design, maintaining projects and teaching. My primary technologies are JavaScript, TypeScript, React, Express (PERN stack), Playwright, Puppeteer, Python, Flask and C. See my [Stack Overflow tags](https://stackoverflow.com/users/6243352/ggorlen?tab=tags) for more technologies ordered roughly by my interest and experience. In addition to Stack Overflow, I'm active on [Code Review Stack Exchange](https://codereview.stackexchange.com/users/171065/ggorlen). Feel free to peek at a few of these reviews to get a sense of the insights I can offer your code. I'm looking forward to hearing about your project! _<sub>Profile picture by the wonderful [Emily Huston](https://emilyhuston.github.io) ❤️</sub>_
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