Andrii M

Frontend developer at Koitechs

Koitechs • Fulltime

Feb 2025 - Present • 1 yr 3 mos

🎨 Frontend Development (Hiring & Job Platform) ✔ Developed a production-ready hiring & job search web application ✔ Built complex, reusable UI components with a strong focus on maintainability ✔ Delivered pixel-perfect UI, fully aligned with design systems and Figma specs ✔ Implemented advanced performance optimizations and rendering strategies ✔ Significantly improved Core Web Vitals:  • LCP reduced by 60–70% through asset and rendering optimization  • CLS stabilized to ~0.01, eliminating layout shifts ✔ Achieved Lighthouse scores of 95–98+ across key pages ✔ Applied modern SEO best practices:  • Semantic HTML structure  • SEO-friendly routing and metadata  • Improved crawlability and indexing ✔ Implemented responsive design, optimized for mobile, tablet, and desktop screens ✔Ensured smooth UX for high-traffic user flows: job search, filtering, applications, and employer dashboards

Full Stack Web Developer at Senseteq

Senseteq • Fulltime

Jun 2022 - Jan 2025 • 2 yrs 7 mos

🧠 Domain Expertise & Business Logic ✔ Worked across 4+ business domains, deeply analyzing business logic and user flows in each project ✔ Domains include:  • E-commerce — high-traffic product catalogs, checkout flows, payments  • Admin dashboards — data-heavy systems with role-based access  • Journalism & Media — content platforms with SEO and high publishing frequency  • Healthcare / Hospitals — secure systems with strict data access rules 🚀 Frontend Development & Performance ✔ Delivered 7+ production-ready responsive web applications ✔ Optimized rendering for large datasets (1k-10k+ items) and complex UI animations ✔ Implemented advanced image optimization and lazy-loading strategies → Page load time reduced from ~5.0s to 1.3s (≈74% faster) ✔ Improved Core Web Vitals across projects:  • LCP improved by 50–70%  • CLS reduced to ~0.01–0.05, eliminating visible layout shifts ✔ Increased Lighthouse performance score to 96–100 ✔ SEO optimization using semantic HTML and modern best practices → Higher indexing quality and improved search visibility ⚙️ Backend Development & Optimization ✔ Optimized backend queries, reducing API response time by 30–45% ✔ Reduced unnecessary database load through query refactoring and caching strategies ✔ Implemented secure authentication & authorization → Protected routes and user data for 100% of sensitive endpoints ✔ Built backend-driven image processing pipelines → Dynamic resizing for multiple viewports, reducing image payload size by up to 60% ✔ Integrated third-party APIs, including payment systems ✔ Designed scalable, production-ready APIs supporting complex frontend logic 📈 Business & Product Impact ✔ End-to-end optimization — from UI performance to backend architecture ✔ Focus on measurable outcomes:  • Faster load times  • Stable layouts  • Improved SEO metrics  • Scalable infrastructure ✔ Consistent experience delivering production-ready solutions, not just isolated features