В'ячеслав

Viacheslav Denysko
Frontend Engineer
[open contact info](look above in the "contact info" section) | Email | Портфоліо | LinkedIn | GitHub

PROFILE

Frontend Engineer with 6+ years of professional experience building enterprise CRM systems,
e-commerce platforms, and custom web applications.

I specialize in Vue.js, Nuxt.js, JavaScript, and modern frontend technologies, focusing on scalable architecture, performance
optimization, and creating intuitive user experiences. Throughout my career, I have worked on projects ranging from online
stores and booking platforms to enterprise-level CRM solutions with real-time communication.

Beyond implementation, I actively contribute to architecture discussions, code reviews, and mentoring junior developers.
Collaborated with backend engineers, designers, QA specialists, marketers, business analysts, and product managers to
transform business requirements into reliable, maintainable, and user-focused software.

TECHNOLOGIES

Vue.js, Nuxt.js, JavaScript, TypeScript, HTML5, CSS3, SCSS\SASS\LESS, Tailwind CSS, PHP, ASP.NET Core, Razor
MVC, OpenCart, WordPress, REST API, SignalR, WebSocket, WebRTC, MySQL, Git, Postman, Jira, Confluence, Notion,
Slack, Teams

EXPERIENCE

E-Consulting (CRM.UA), Frontend Engineer, November 2025 – Present

Develop enterprise modules for the XRM Contact Center platform, creating scalable and high-performance interfaces used by
contact center operators on a daily basis. Build complex functionality including SoftPhone, audio and video conferencing,
internal messaging, administrative panels, configurable data tables, and role-based system features.

Collaborate closely with backend engineers, QA specialists, business analysts, designers, and product stakeholders to deliver
reliable enterprise solutions. Participate in technical discussions, architecture decisions, production issue investigations, and
continuous platform improvements while maintaining high standards of code quality and performance.

● Developed real-time communication features using SignalR and WebRTC.
● Implemented audio and video conferencing modules.
● Built configurable administration interfaces and CRM functionality.
● Integrated frontend applications with REST APIs and Microsoft Dynamics 365 CRM.
● Participated in architecture discussions and technical planning.
● Investigated and resolved production issues.
● Performed code reviews and mentored junior developers.

Room15, Frontend Developer, January 2021 – November 2025

Developed and maintained commercial web applications ranging from e-commerce stores and booking systems to custom
business platforms. Worked with Vue.js, Nuxt.js, OpenCart, WordPress, JavaScript, PHP, and MySQL to deliver scalable,
responsive, and business-oriented solutions.

Took ownership of multiple projects throughout their lifecycle, implementing new functionality, optimizing application
performance, improving SEO, and integrating third-party services. Worked closely with designers, backend developers, QA
engineers, marketers, project managers, and clients to transform business requirements into high-quality digital products.
Beyond feature development, actively participated in architecture discussions, proposed technical solutions, reviewed code,
and mentored junior developers, helping improve development workflows and overall code quality.

● Led development of multiple commercial web projects.
● Built reusable frontend components and UI modules.
● Optimized website performance and loading speed.
● Developed custom integrations and API-based functionality.
● Participated in architecture planning and technology selection.
● Conducted code reviews and mentored junior developers.
● Collaborated with multidisciplinary teams throughout the development lifecycle.

Freelance, Frontend Developer , January 2020 – January 2021

Developed responsive websites, landing pages, and custom web solutions for clients across different industries. Customized
WordPress and OpenCart projects, implemented frontend functionality, optimized website performance, and integrated
third-party services.

Worked directly with clients to understand business goals, propose technical solutions, and deliver user-friendly, responsive
websites that met both functional and visual requirements.

● Developed responsive websites and landing pages.
● Customized OpenCart and WordPress projects.
● Improved website performance and SEO.
● Integrated third-party APIs and external services.
● Delivered complete client projects independently.

PROFESSIONAL HIGHLIGHTS

● 6+ years of commercial frontend development experience.
● Developed enterprise CRM functionality for contact center solutions.
● Built real-time communication modules using SignalR and WebRTC.
● Optimized performance across commercial websites and e-commerce platforms.
● Led development of multiple commercial projects from planning to deployment.
● Participated in architecture design and technology selection.
● Conducted code reviews and mentored junior developers.
● Collaborated with cross-functional teams including backend developers, QA engineers, designers, marketers,
business analysts, and product managers.
● Strong understanding of UI/UX principles thanks to a background in digital design.

EDUCATION

Master's Degree in Computer Science, Oles Honchar Dnipro National University, 2020 – 2022

Bachelor's Degree in Cybersecurity, Oles Honchar Dnipro National University, 2016 – 2020

LANGUAGES

● Ukrainian — Native
● English — Intermediate (B2)