Full-Stack Developer (Consultant)
Remote
Advising on modernization strategies for legacy e-commerce stacks. Implemented Zero-Trust security protocols and automated critical User Journey testing (Puppeteer).
Leonid Dzyhanskyi
Lead Frontend Engineer
Web Platform Expert (SFCC & Modern Stack) • Ukraine
Professional Summary
Engineering Lead with 12+ years of experience rooted in Fundamental Web Technologies. I define myself as Framework Agnostic: while I seamlessly work with React, Next.js, or Vue, I view them merely as tools. My true expertise lies in the underlying platform—Native JavaScript, Web Components, and CSS Architecture.
I specialize in High-Performance Architectures using a Tiered Optimization Strategy. I leverage standard browser capabilities first—utilizing Web Workers for off-main-thread processing—and only escalate to Rust/WASM when absolute performance is critical.
💡 Role Definition: Operating at "Staff" Level
While my title is Lead, I operate with a Staff Engineer mindset. Unlike a traditional Team Lead focused purely on management, I focus on Technical Leverage:
- Force Multiplier: I build tools and workflows that make the entire team faster.
- System Strategy: I solve cross-domain challenges (Legacy vs. Modern) rather than just individual tickets.
- Hands-on: I spend 60%+ of my time coding critical paths to unblock the team.
Technical Expertise
Web FoundationsDeep Native JS (ES3-ESNext)Light DOM Web ComponentsBrowser Rendering MechanicsDOM Manipulation
Performance StrategyTiered OptimizationMain Thread (UI)Web Workers (Data Processing)Rust + WASM (Heavy Computation)
SFCC & LegacyLegacy JS (ES5) backend scriptingMonolithic pipeline optimizationLazy Loading strategies for 3rd-party
Modern R&DNext.js (App Router)Rust + WASM (High-perf logic)GCP (Cloud Run)Firebase
CSS ArchitectureModern CSS (Variables, Logical Properties)Modular SCSS (Automation Mixins)BEM MethodologyTailwind
Engineering OpsNative RTLWCAG AA (Architectural Level)Core Web Vitals AuditingCI/CD, Zero-Trust Security
Cognitive Profile (Gallup CliftonStrengths®)
My engineering approach is validated by my top Gallup themes. Download Full Report (PDF)
1Arranger
OrchestrationI naturally organize chaos. Whether configuring complex Webpack builds or managing distributed teams, I find the most efficient arrangement for resources.
2Achiever
ExecutionI have high stamina for delivery. I don't just design; I code critical paths myself to ensure the product crosses the finish line.
3Restorative™
StabilizationI excel at diagnosing "broken" systems. Transforming slow, legacy codebases into performant products is my core motivation.
Professional Experience
Principal Architect & Product Owner
Ukraine
Multi-Tenant Micro-Mobility Platform on GCP. Hub (scootify.eco), MaaS (scootify.com.ua), Retail (hiley.com.ua). Next.js + Rust/WASM. Light DOM Web Components. Web Workers for data sorting (UI unblocked). Telegram/Chat Bots for analytics.
Lead Frontend Engineer
Remote
Revamped Webpack/Rspack build with strict Tree-Shaking. Replaced jQuery with Native JS. Established TSD standards. Dynamic Image Composition and smart lazy-loading. Scalable SCSS system with Native RTL support.
SFCC Developer
France (Remote)
Legacy stabilization, checkout refactoring for improved conversion. Multi-currency logic and RTL layout adaptations for global markets.
Front-End Team Lead
Ukraine
Led a team developing complex, multilingual Angular applications. Focus on architectural consistency and strict type safety.
Senior SFCC Developer
Ukraine
Core Contributor: 10+ major e-commerce rollouts for global brands. Mastered SFCC caching strategies and asset optimization.
Co-Founder & Lead Engineer (Civic Tech)
Ukraine
Hyper-local Social & GovTech Platform for Stryzhavka community. Integrated municipal data with social networking features. Successfully transferred to local government as official digital infrastructure.
Web Developer
Ukraine
Early career focus on PHP, WordPress, and cross-browser compatibility.