Dmitrii Frolov

A MarTech & e-commerce SaaS platform for web forms, promo widgets, and email marketing.

• Built a full email marketing toolkit including a campaign builder, editor, and integrations with third-party services, reducing time-to-launch for new email campaigns from days to minutes.
• Designed and implemented an onboarding flow for new users, improving early user engagement and reducing churn during the first week after signup.
• Integrated A/B testing into the platform, including feature flags and experiment tracking, enabling data-driven optimization of CTAs and onboarding flows that improved conversions.
• Redesigned the platform dashboard, improving navigation architecture so users can reach any feature within 3 clicks, reducing time-to-feature and improving overall product usability.
• Introduced structured code review process and automated linting standards, cutting release cycle from monthly to weekly and reducing post-release regressions below 5%.

A Travel & Hospitality SaaS booking platform for hotels, flights, and events, built on Next.js.

• Reduced Total Blocking Time by 80% (4.2s → 0.84s) and eliminated Cumulative Layout Shift through Next.js SSR pipeline optimization, raising Lighthouse performance score by 33 points.
• Built the component library using Tailwind CSS and Storybook with 100% auto-generated documentation coverage, streamlining design-engineering collaboration.
• Integrated Lighthouse checks into CI/CD with automated reports, enabling continuous performance monitoring and early regression detection before production.
• Delivered features end-to-end as a fullstack engineer, handling both frontend and backend implementation independently using Node.js and NestJS.

A MarTech & e-commerce SaaS platform for web forms and promo widgets.

• Migrated legacy AngularJS codebase to React and RTK using Single-SPA micro-frontend architecture, refactoring the codebase and reducing Total Blocking Time (TBT) by 60%.
• Built a statistics dashboard with geo-charts and time series visualizations using Google Charts.
• Migrated authentication from session cookies to JWT tokens, reducing server load and enabling instant dashboard access without page reloads, improving login experience.
• Added click-to-configure interaction to the WYSIWYG editor, allowing users to access any widget element's settings with a single click, significantly improving editing speed.
• Optimized Webpack build pipeline through bundle splitting, tree shaking, and dependency cleanup, reducing build time by 60% and improving developer experience.
• Built an integrations layer connecting the platform with third-party email marketing services via webhooks, enabling real-time data sync between the platform and external tools.
• Redesigned the token system and style architecture, enabling pixel-perfect component development across the platform.

An EdTech online platform for kids with real-time video lessons and interactive whiteboard.

• Acted as tech lead and mentor for a micro-team of 3 engineers, delivering the MVP in 4 months and establishing the technical foundation for the entire platform.
• Researched and integrated the open-source media server Kurento, enabling WebRTC-based video calls in the browser and accelerating the launch of the first product version.
• Designed and built a real-time video communication platform using WebRTC and Node.js from scratch, scaling to 1000+ concurrent active sessions per day.
• Built a real-time collaborative whiteboard with multi-user interaction, animations, and visual effects, powered by WebSockets for instant cross-participant synchronization.
• Built a self-diagnostic tool that checks users' camera, microphone, and connection quality before video lessons, reducing lesson cancellations by 40% and improving session reliability.
• Set up Jenkins CI/CD pipeline with multi-environment staging stands deployed on AWS EC2, automating builds and deployments and eliminating manual release steps.
• Integrated Lokalise for i18n automation, reducing translation preparation time for new features by 3x.
• Grew into Tech Lead role, doubled the engineering team, established development processes and code review standards that cut the release cycle from monthly to weekly.

A Telecom SaaS platform for cloud storage, serving major mobile operators including Vodafone.

• Designed a deeply customizable frontend architecture for the company's core product Cloudike, used by millions of users across multiple operators.
• Built web and mobile clients from the ground up, including an SSO client for seamless authentication across all platforms.
• Implemented i18n support for multiple languages across all operator markets.
• Ensured WCAG compliance across all platform interfaces for users with disabilities.