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I'm a software engineer that loves learning about new technologies and using them in real projects. I started as a backend developer but specialized as a frontend engineer during the last 7 years (JavaScript, CSS, Vue). Currently learning Drupal backend, Wordpress Gutenberg blocks with React, Blockchain, and playing with LLMs
### 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.
**Senior Frontend Engineer | JavaScript & React Specialist** I’m a senior software engineer with 10+ years of experience delivering reliable, scalable web applications. I turn complex requirements into clean, maintainable solutions that drive real impact quickly. Beyond coding, I’m passionate about improving team workflows, mentoring developers (including several years guiding students and professionals on Codementor), and ensuring projects move smoothly from idea to production. I’ve helped startups and established companies accelerate development cycles, improve product quality, and scale platforms serving thousands of users daily. Along with deep technical expertise, I bring the ability to collaborate, guide, and deliver measurable results. **Core skills:** React.js, Next.js, Node.js, TypeScript/JavaScript, databases (SQL/MongoDB), Tailwind, HTML/CSS, UX/UI, deployments on Vercel & AWS.
**AI, AWS, Cloudformation, Security & Terraform expert with 15 zero-downtime migrations under his belt.** **Executive Summary** Experienced Engineering Manager & Fractional Executive with a robust background in cloud architecture, agile methodologies, artificial intelligence, automation & security. Adept at leading engineering teams (and teams of AI agents) to deliver high-quality software solutions, optimizing system performance, and fostering a culture of continuous improvement. Expert in scalable multi-application cloud based reliability engineering, debugging, security and uptime management. **Personal Description** "I have been writing code since age 4, networking since age 12 and server administration since age 15. I am not only a coniseur, but also a master artist, of code in any language. I have always worked alone, and striven for perfection, but never quite got there. AI has changed that and I am now achieving not just perfection, but absolute masterpieces in 1/10 or less time than I ever thought possible. As a polymath, I've always been on or near the bleeding edge of technology, staying agile and adapable, rarely repeating stacks from project to project, always using the best tool for the purpose. The advancement in agentive AI over the past 6 months, when properly utilzed in experienced and demanding hands such as myself, basically turns me into a team of 20...with unlimited knowledge and zero time required to learn new APIs/toolkits/etc." \- Jason
Hi, I’m a front-end developer with 14+ years of experience, specializing in large-scale websites, complex front-end architectures, and advanced yet performant animations. My work focuses on: * high-performance, SEO-friendly front ends * animation systems that enhance UX without hurting speed * maintainable codebases that scale to hundreds of pages and long-term teams --- ## Selected Projects & Contributions **payall.com** *Role:* Front-end development, animation, performance *Stack:* Next.js, Contentful * Built a highly animated marketing site with a strong focus on performance and responsiveness **mirakl.com** *Role:* Front-end development *Stack:* Gatsby, headless CMS * Clean, restrained animation work on a large enterprise website **ravio.com** *Role:* Front-end development (site + web app) *Stack:* Next.js * Implemented subtle, UX-driven animations across both marketing and product surfaces **[pov.camera](https://pov.camera)** *Role:* Front-end development, architecture, performance *Stack:* Nuxt, Vue 3 * Pixel-perfect, SEO-optimized site and multiple Vue 3 web applications * Heavy focus on subtle, GPU-friendly animations **majority.com** *Role:* Front-end development *Stack:* Nuxt * Built a simple, fast UI on top of a very complex underlying infrastructure **nexford.edu** *Role:* Front-end development, integrations *Stack:* Gatsby, Contentful, HubSpot * Implemented advanced HubSpot integrations across a large content-driven site **[language.work](language.work)** *Role:* Front-end development, performance optimization *Stack:* Next.js, headless CMS * Performance-first build for a content-heavy platform **thebcms.com** *Role:* Front-end development, architecture *Stack:* Next.js, headless CMS * Clean, maintainable codebase with subtle motion and strong DX **videotoflip.com** *Role:* Full-stack (front end + backend architecture) *Stack:* Next.js, Tailwind, Node.js, FFmpeg * Built a video-processing pipeline with FFmpeg and a fast, conversion-focused frontend **pinkerton.com** *Role:* Front-end development, custom features *Stack:* Gatsby, custom headless CMS * 800+ pages, complex content modeling, and extensive custom functionality **[okbye.momcilo.com](okbye.momcilo.com)** *Role:* Design & development *Stack:* TypeScript, HTML, SCSS (no frameworks) * Built from scratch to maximize control, performance, and animation precision **natuera.com** *Role:* Front-end development, animation, performance *Stack:* Nuxt, headless Shopify * Heavy animation work combined with aggressive speed optimizations --- ## Clients I’ve worked with teams at **NASA, Coca-Cola, HBO, Pornhub, Gucci, Warner Bros**, and others. --- ## Teaching & Workshops Alongside client work, I teach creative programming and run workshops internationally, focusing on: * animation systems * creative front-end engineering * performance-conscious visual design --- If you’re looking for someone who can handle complex front-end problems while keeping things fast, clean, and maintainable, I’m happy to help. Best, Mo
Full Stack Software Engineer with 8 years of experience in developing large and small projects. Skills: JavaScript, NodeJs/Express, AngularJS, MySQL, Bootstrap, jQuery, Gulp, Grunt, PHP, Ruby, Docker, MongoDB, Socket.io
Data Visualization Engineer / Journalist
Hi, I am Gerald, a Front-End and Wordpress Developer. Mostly I work with creative agencies and designers.
Rudolph Koegelenberg is working as a Web Specialist Consultant / Fullstack Web Developer. Passionate about tech, eager to learn new things and also teach. With over 12+ years in experience using various platforms ranging from C# + ASP.NET Core / / ServiceStack.NET / Node.js / Vue.js / JavaScript / jQuery and Angular.js / HTML & CSS / SASS / PHP / Wordpress / MySQL / MS SQL / MongoDB
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