Denis Vasiliev
@serendave
Frontend engineer specializing in React & TypeScript, building scalable, high-performance web apps and design systems.
GermanyWhat I'm looking for
I’m a Front-end Engineer focused on building scalable, high-performance user experiences with React and TypeScript. I’ve led frontend development across multiple client projects and delivered business-critical internal tooling that supports LiveOps workflows.
At Valor Software, I designed and implemented scalable React and TypeScript applications used by thousands of end users. I also owned design system work—building reusable components adopted across multiple projects—and improved frontend performance, code quality, and engineering standards.
I drive architectural and platform improvements, including migration initiatives to NX monorepos and TypeScript. I’ve strengthened CI/CD pipelines and developer experience while mentoring developers through code reviews and architectural discussions.
Earlier, at LTD Fivewalls, I built end-to-end integrations for an enterprise collaboration platform with Slack, Microsoft Teams, Jira, and Confluence. I enjoy collaborating with designers and product teams to deliver intuitive, business-focused experiences while continuously improving reliability and usability.
Experience
Work history, roles, and key accomplishments
Frontend Engineer
Wooga GmbH
Nov 2024 - Present (1 year 7 months)
Developed business-critical internal LiveOps tools, focusing on scalability and performance across multiple teams. Introduced AI-assisted workflows and contributed to the evolution of the company design system to improve UI consistency and delivery velocity.
Frontend Engineer
Valor Software
Mar 2021 - Nov 2024 (3 years 8 months)
Led frontend development across multiple client projects, driving architectural decisions and collaborating with stakeholders. Designed and maintained scalable React and TypeScript applications, built reusable design system components, and led migrations to NX monorepos and TypeScript to improve maintainability, CI/CD, and developer experience.
Full-Stack Engineer
LTD Fivewalls
Aug 2020 - Mar 2021 (7 months)
Developed features for an enterprise collaboration platform integrating Slack, Microsoft Teams, Jira, and Confluence. Implemented end-to-end functionality across frontend and backend systems using JavaScript, React, Node.js, and MongoDB while improving reliability and usability.
Education
Degrees, certifications, and relevant coursework
Kharkiv National University of Radioelectronics
Master of Software Engineering, Software Engineering
2022 - 2024
Master of Software Engineering at Kharkiv National University of Radioelectronics (Oct 2022–Jun 2024).
Kharkiv National University of Radioelectronics
Bachelor of Software Engineering, Software Engineering
2018 - 2022
Bachelor of Software Engineering at Kharkiv National University of Radioelectronics (Sep 2018–Jun 2022).
Tech stack
Software and tools used professionally
Availability
Location
GermanyAuthorized to work in
Job categories
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