Denis Mironov

Senior Software Engineer with 6+ years of experience building scalable, performant web applications for SaaS and B2C products. I focus on clean architecture, performance optimization, and solid testing practices to ship reliable features faster. I've built a monolith frontend codebase with 6 submodules sharing common components, mentored developers through code reviews and pairing, and love collaborating with product/design to ship features that deliver real business results.

● Developed an MVP of a cross-platform dating application featuring profiles, messaging, and swipe functionality. Delivered the product on time, helping the customer acquire users and secure additional investment, built with React, Redux toolkit, WebSockets, Keycloak, Firebase.

● Led one of frontend service of SaaS product for 3 years. Service grew to 6 submodules and 200k+ lines of codebase, built with React, TypeScript, Tailwind, ChartJS, Material UI, Vite, Jest, SonarQube.

● Pitched and built authentication microservice to unify 5+ services of the ecosystem, built with React, TypeScript, Keycloak, Tailwind.

● CI/CD optimization, reduced cold start by 75% (80s → 20s) and improved deployment duration by 35%, increasing release frequency. Used Vite, lazy-loading, and simplifying imports.
● Mentored 5+ developers (code reviews, pairing, architecture discussions), raising team code quality and accelerating onboarding.
● Refactored legacy code at cryptocurrency’s exchanger service with 100.000MAU,

simplified readability and reduced time to market, built with React, Web3, eosjs, SCSS.