Sergiy – Next.js, React, Typescript

• Delivered end-to-end features on a highly scalable, event-sourced architecture.
• Adopted Effect.ts for type-safe domain modeling, schema validation, and robust error handling across the application stack.
• Designed and implemented a complex template-driven document generation pipeline, ensuring strict UI consistency and high performance.
• Optimized CI/CD monorepo pipelines and automated workflows, reducing runner execution costs by about 30%.

A large-scale analytics web application for enterprise customers, enabling them to analyze website traffic, market trends, audience behavior, and competitive insights. This role involved. working on data-rich dashboards, interactive visualizations, reporting tools, and shared UI infrastructure, with a strong focus on scalability, performance, and maintainability.

• Defined and owned frontend architecture and infrastructure for public-facing platforms, including the company’s core public website serving 15–20M monthly visits.
• Designed, built, and drove the adoption of a company-wide design system and shared UI packages.
• Integrated the design system across 5 separate products with different frontend stacks, ensuring visual consistency and reducing feature time-to-market.
• Led frontend development for the App Analysis platform.
• Architected and shipped the initial MVP in 3 months, scaling the frontend to support a 5x growth in data coverage.
• Maintained and optimized local containerized development workflows using Docker and Kubernetes and CI/CD pipelines.
• Set company-wide frontend standards and architectural guidelines across multiple engineering teams.
• Mentored senior frontend engineers and guided long-term technical decision-making with product and design teams.
• Built key parts of core analytics products and transitioned legacy interfaces to modern React.

A software development agency delivering websites and web applications for clients across different industries. Projects ranged from corporate websites to custom web solutions.

• Developed the user interface for a commercial real estate web platform, focusing on responsive layout and smooth search workflows.
• Implemented the UI and frontend integration for a real-time messaging chat application.