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I'm a developer who specializes in... from... Give an introduction about yourself, who are you, what are your most important skills and what differentiates you from other devs. This is the first thing clients will see. They are often interested in sector experience and knowledge, so please mention it. --- Employment and project experience Senior Developer Salesforce Inc. _January 2017 - March 2017_ Full-stack Developer Microsoft Inc. _January 2019 - March 2019_…I'm a developer who specializes in... from... Give an introduction about yourself, who are you, what are your most important skills and what differentiates you from other devs. This is the first thing clients will see. They are often interested in sector experience and knowledge, so please mention it. --- Employment and project experience Senior Developer Salesforce Inc. _January 2017 - March 2017_ Full-stack Developer Microsoft Inc. _January 2019 - March 2019_

Denis Vershadov

Front-End Developer, Full Stack Developer, Web Developer, +2

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I'm a developer who specializes in... from... Give an introduction about yourself, who are you, what are your most important skills and what differentiates you from other devs. This is the first thing clients will see. They are often interested in sector experience and knowledge, so please mention it. --- Employment and project experience Senior Developer Salesforce Inc. _January 2017 - March 2017_ Full-stack Developer Microsoft Inc. _January 2019 - March 2019_…I'm a developer who specializes in... from... Give an introduction about yourself, who are you, what are your most important skills and what differentiates you from other devs. This is the first thing clients will see. They are often interested in sector experience and knowledge, so please mention it. --- Employment and project experience Senior Developer Salesforce Inc. _January 2017 - March 2017_ Full-stack Developer Microsoft Inc. _January 2019 - March 2019_

Available to hire

Warszawa, Poland

I’m a developer who specializes in… from…

Give an introduction about yourself, who are you, what are your most important skills and what differentiates you from other devs. This is the first thing clients will see. They are often interested in sector experience and knowledge, so please mention it.

Employment and project experience

Senior Developer Salesforce Inc.
January 2017 - March 2017

Full-stack Developer Microsoft Inc.
January 2019 - March 2019

Skills

Experience Level

Expert

Expert

Expert

Expert

Language

English

Advanced

Polish

Intermediate

Russian

Fluent

Work Experience

Frontend Engineer at Soft Swiss

January 2, 2024 - January 2, 2026

Built internal dashboards and tooling using React and TypeScript for monitoring and managing infrastructure; designed UI for visualizing asynchronous work flows and system state in distributed environments; collaborated with backend, QA, and product teams on trading workflows and system behavior; improved performance and usability of internal tools handling real-time data; worked with event-driven architectures (RabbitMQ) to optimize data flow and frontend integration; contributed to architecture discussions, code reviews, and sprint planning; implemented monitoring UI for distributed systems and real-time status updates.

Senior Frontend Engineer (CEX SaaS) at Merkleon

May 2, 2021 - January 2, 2024

Developed low-latency trading interfaces and crypto exchange platform UX; built scalable WebSocket abstraction layer to handle multiple real-time data streams (tickers, order book depth); optimized rendering for high-frequency updates via UI virtualization, significantly reducing UI lag under heavy data load; designed reusable React/TypeScript components and internal UI kit for multiple products; implemented crypto payments integrations and internationalization (i18next) with automated translation workflows; collaborated with backend, QA, and product teams on trading workflows and system behavior; participated in architecture discussions and code reviews.

Full Stack Developer (Contract) at Ringier Axel Springer Tech

February 1, 2021 - May 2, 2021

Developed full-stack features for a data-driven platform using React and Node.js; worked with REST APIs and contributed to backend services.

Frontend Developer at SEN LA Group

June 2, 2018 - January 2, 2021

Built SPA applications across multiple domains including fintech, e-commerce, and enterprise systems; developed UI components, business logic, and integrations with backend APIs; contributed to browser extensions and microservice-based front-end architectures.

Frontend Engineer at SOFT SWISS

January 2, 2024 - January 2, 2026

Monitored and visualized distributed systems on a dedicated infrastructure monitoring platform; designed UI for real-time dashboards, event-driven architectures, and performance optimizations; collaborated with backend, QA, and product teams on system behavior and data flows.