Stepan Fedyanov
Senior Software Engineer

May 2024 – Present

The #1 design and technology company in Eastern Europe, known for complex digital products and pioneering AI solutions (Fokus, Nikolay Ironov).

• Designed core features for Fokus (100k+ users), including complex interactive canvas elements and secure Stripe/Yoomoney payment flows, directly driving monetization.
• Built a custom AI Code Reviewer (Node.js, OpenAI/Gemini) that reduced code review turnaround time by 67% and significantly decreased the Task Return Rate (TRR).
• Led the complete migration from Vue 2 to Vue 3 (Nuxt 3), eliminating technical debt and establishing a strict dependency update protocol.
• Implemented a robust testing strategy (Playwright E2E, Vitest) and Sentry monitoring, increasing crash-free sessions from 89% to 98%.
• Unified a fragmented UI codebase into a standardized component library (Storybook), streamlining Design-to-Dev handoff and ensuring UI consistency.
• Engineered a TypeScript color generation engine based on HSL mathematics and WCAG standards, automatically generating accessible palettes based on user content.
• Scaled the AI identity generator "Nikolay Ironov" by implementing SSR and performance optimizations, improving PageSpeed scores from 40 to 80 and increasing organic traffic by 75%.
• Introduced and enforced the Feature-Sliced Design (FSD) pattern into a large legacy codebase, significantly increasing modularity and maintainability.
• Designed the architecture for highly automated, lead-generating microservices, which became the primary source of inbound leads for the product.

Stack: Vue 2/3, Nuxt 2/3, TypeScript, Pinia, Node.js, OpenAI/Gemini, Python (Django/DRF), PostgreSQL, Playwright, Vitest, GitLab CI/CD, FSD.

June 2023 — May 2024

• Developed key generative and front-end features for Nikolay Ironov, the pioneering AI identity generator for small businesses, scaling the product to over thousands of unique design projects.
• Led a major performance refactoring initiative, converting the frontend to leverage Server-Side Rendering (SSR) and eliminating outdated dependencies. This effort improved Google PageSpeed scores from 40 to 80 and drove a ~75% growth in organic search traffic.
• Introduced and enforced the Feature-Sliced Design (FSD) architectural pattern into a large legacy codebase, which significantly increased code clarity, modularity, and long-term maintainability across the engineering team.
• Designed and built the architecture for a fleet of highly automated, lead-generating microservices. This scalable system rapidly became the primary source of inbound leads for the product, requiring minimal developer intervention for deployment and A/B testing.

Stack: Vue 2/3, Nuxt 2/3, JavaScript/TypeScript, Vuex/Pinia, NodeJS, SSR, SEO/GEO Optimization, FSD Architecture, Django/Python (API Integration), PostgreSQL.

January 2020 — June 2023

One of the largest freelance marketplaces in the CIS, serving thousands of clients and professionals.

• Successfully delivered over 20 diverse Fullstack projects, specializing in responsive applications built with Vue.js and Nuxt, ensuring high standards for UX, accessibility, and architectural robustness.
• Performed extensive codebase refactoring and dependency pruning across various client projects, achieving a reduction in bundle size by up to 40% and consistently improving Google Lighthouse scores to 90+.
• Engineered efficient data fetching strategies by integrating REST and GraphQL APIs. Implemented aggressive client-side caching (e.g., via Vuex/Pinia), resulting in page load time improvements of up to 50%.
• Conducted data-driven UI/UX improvements based on A/B testing for e-commerce clients, directly resulting in an average 30% increase in conversion rates.
• Designed and implemented multiple reusable component libraries (Design Systems) using composition principles, accelerating future feature development for clients by an estimated 25%.

Stack: Vue.js, Nuxt.js, Vuex/Pinia, JavaScript/TypeScript, REST/GraphQL, Figma, A/B Testing, PostgreSQL/MongoDB.