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denys_derkach

Denys Derkach

@denys_derkach

Full Stack Engineer, 6 yrs, Angular, React, Next, Vue, Node

Ukraine
English, Ukrainian
About me
I fix, build, and modernize production web apps. 6+ years of engineering across fintech, healthcare, and marketing SaaS. Angular is my depth (v11–v21, RxJS, NGXS), and I also ship in React, Next.js, Vue, and Node — I can own a feature from API to UI when needed. I deliver the fixes and features that need a careful, experienced hand: state tangles, broken forms, performance, small features, and version upgrades, without breaking the rest. Message me before ordering — I'll look for free and tell you the real scope. Not happy with the first result? I revise until it's right.... Read more

Skills

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denys_derkach
Denys Derkach
Offline • 
Average response time: 1 hour

See my services

Bug Fixes
I will fix your angular bug fast in production code
From$35 / projectMore details
Bug Fixes
I will fix your react or next js bug in production code
From$40 / projectMore details

Work experience

Full Stack Engineer

Rule • Full-time

Mar 2022 - Present • 4 yrs 4 mos

Domain: SaaS Marketing Automation B2B Platform. Stack: Angular 13/18/21, React, Next.js, TypeScript, RxJS, NGXS, Tailwind CSS, SCSS, Storybook, Jest, Webpack, Docker. Core Platform Engineering: Developed and scaled core features of a large-scale B2B SaaS marketing automation platform, enabling mid-to-large businesses to run multi-channel campaigns (SMS, RCS, email). Built and optimized a complex, rich drag-and-drop template editor. Business Impact: Shipped major feature releases that directly drove user retention, maintained UX consistency across complex interfaces, and achieved business KPIs. Workflow Efficiency: Actively integrate AI-assisted coding tools (Cursor, GitHub Copilot, Claude Code) into daily workflows to drastically reduce development boilerplate and maintain an accelerated delivery pace. Collaboration: Contributed to key component architecture and REST API integration patterns within a cross-functional Agile team of back-end developers, product managers, and designers.