Senior Frontend Engineer with 7 years of experience building scalable web applications for fintech, Web3, and large-scale digital products. Led frontend architecture and improved delivery speed and developer experience through performance-focused engineering and strong API-driven development. Experienced with React and Next.js, TypeScript, CI/CD, testing, and performance optimization. Delivered enterprise portals, blockchain-related UI features, authentication flows, and internal tooling while mentoring engineers and ensuring quality through automated pipelines and code standards.…

Yaroslav Denisov

Senior Frontend Engineer with 7 years of experience building scalable web applications for fintech, Web3, and large-scale digital products. Led frontend architecture and improved delivery speed and developer experience through performance-focused engineering and strong API-driven development. Experienced with React and Next.js, TypeScript, CI/CD, testing, and performance optimization. Delivered enterprise portals, blockchain-related UI features, authentication flows, and internal tooling while mentoring engineers and ensuring quality through automated pipelines and code standards.…

Available to hire

Senior Frontend Engineer with 7 years of experience building scalable web applications for fintech, Web3, and large-scale digital products. Led frontend architecture and improved delivery speed and developer experience through performance-focused engineering and strong API-driven development.

Experienced with React and Next.js, TypeScript, CI/CD, testing, and performance optimization. Delivered enterprise portals, blockchain-related UI features, authentication flows, and internal tooling while mentoring engineers and ensuring quality through automated pipelines and code standards.

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Skills

Experience Level

React JS
Expert
TypeScript
Expert
GitHub
Expert
JavaScript
Expert
API
Expert
Ethers.js
Expert
GraphQL
Expert
Tailwind
Expert
Docker
Expert
Web3
Expert
Web Design
Intermediate
MetaMask
Intermediate
Solidity
Beginner
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Language

Work Experience

Senior Frontend Engineer at Raiffeisenbank
January 1, 2024 - October 1, 2025
Led architectural overhaul for a developer portal serving 200 enterprise clients. Defined a scalable frontend strategy and influenced backend API design to improve performance. Eliminated full portal rebuilds by re-architecting the documentation pipeline to load content at runtime, enabling instant documentation updates. Established and automated CI/CD pipelines with integrated SAST and security scanning to ensure code quality and compliance within a banking environment. Owned end-to-end frontend technical decisions including architecture decisions, PR reviews, and implementation standards. Mentored junior engineers to become mid-level contributors within a year through structured coaching and code reviews.
Frontend Engineer at Lido DAO
June 1, 2023 - October 1, 2023
Developed and shipped public-facing UI components for Lido’s main staking application, handling complex state management with wagmi and ethers.js. Built an internal QA dashboard to simulate and validate smart contract interactions, enabling faster testing of on-chain transaction flows prior to deployment. Integrated Netlify CMS for the marketing site, cutting content delivery time in half and empowering non-technical teams to manage updates independently.
Frontend Engineer at VK Mail Team
May 1, 2022 - June 1, 2023
Developed a unified authentication module to integrate VK ID across the VK Mail platform, streamlining the login experience for millions of users. Increased CI/CD stability by identifying and fixing over 1,000 flaky Jest and RTL tests, reducing build failures by 70%. Refactored critical UI components in the email client to improve rendering performance and prepare the codebase for future feature development. Served as the on-call engineer for core user-facing features, reducing incident resolution time by diagnosing and fixing production bugs under pressure.
Frontend Engineer at Vivid Money
September 1, 2021 - May 1, 2022
Built a custom CMS from scratch, enabling the marketing team to create and deploy promotional campaigns without engineering support. Developed a library of reusable responsive email templates using MJML, cutting campaign launch time by 50%. Contributed to the core investment feature by implementing the UI for stock and crypto trading flows using React and Redux.
Frontend Engineer at Raiffeisenbank
February 1, 2021 - September 1, 2021
Integrated Dynatrace for real-time performance monitoring, reducing bug resolution time by 20% and support tickets by 40%. Drove test coverage close to 100% for the critical payments module using Jest and RTL to prevent regressions in a high-stakes area of the application. Refined the UI for complex data tables and payment forms based on user feedback, improving usability for internal banking staff. Worked with microfrontends and CI/CD practices to support product delivery.
Frontend Engineer at Digital Economy League (Tele2 project)
June 1, 2019 - February 1, 2021
Developed key frontend features for Tele2’s customer platform serving 47.5M users, including a tariff customization flow that increased user conversion by 15%. Integrated analytics and A/B testing frameworks (e.g., Google Analytics, OptimizeLy) enabling data-driven product decisions. Overhauled the internal CRM used by call center agents, simplifying workflows and reducing ticket processing time.

Education

Specialist Degree at Academy of Law and Management
January 1, 2012 - January 1, 2017
Diploma, Automated Systems at Kungur Motortransport College
January 1, 2006 - January 1, 2010

Qualifications

Add your qualifications or awards here.

Industry Experience

Financial Services, Software & Internet, Gaming, Telecommunications, Other
    Lido.fi smart wallet integration testing app

    Built a demo and testing application for Lido’s Web3 wallet connection library, giving QA engineers and developers a practical environment for validating wallet and smart contract interactions.

    Implemented end-to-end Web3 flows including wallet connection, transaction signing and submission, and transaction status handling, making on-chain functionality easier to test and debug across development workflows.

    Tech: React, TypeScript, Web3, Ethereum, wallet integrations

    Source: https://www.twine.net/signin