Олексій

Oleksii Smolientsev
Senior Software Engineer (Frontend Specialist)

📍 Kyiv, Ukraine | 📞 [open contact info](look above in the "contact info" section) | 📧 [open contact info](look above in the "contact info" section)
Languages: English, Ukrainian

PROFESSIONAL SUMMARY

Results-driven Frontend Engineer with over 7 years of experience in building large-scale, complex web
applications. Expert in developing high-performance user interfaces using React and Angular, with a
strong background in full-stack development and cloud technologies. Proven track record in remote
collaboration, characterized by honesty, dependability, and a proactive approach to solving complex
architectural challenges.

TECHNICAL SKILLS

Frontend: JavaScript (ES6+), TypeScript, HTML5, CSS3, SASS/SCSS, React, Angular, RxJS, NgRX, Nx,
Module Federation, Nativescript.
Backend & Frameworks: Node.js, ExpressJs, NestJS, Yii, Symfony, Django.
Testing & Tools: Jest, Cypress (e2e), Git, Docker, Kubernetes, Gitlab CI.
Databases: MySQL, PostgreSQL, MongoDB, Redis, Elasticsearch, Memcache.
Other Technologies: OAuth, RESTful APIs, Selenium, Web Browsers Extensions.

PROFESSIONAL EXPERIENCE
Suntechinnovation | FrontEnd Developer

March 2023 — Present

Project: Backoffice Admin Panel

Develop and maintain a comprehensive admin panel enabling clients to manage application features,
notifications, and banners.
Implement new functional possibilities and features to improve administrative workflow.
Ensure code reliability by writing comprehensive unit tests using Jest.
Tech Stack: React, TypeScript, React-Redux, Jest.

Valor Software | JavaScript Developer

October 2020 — February 2023

Projects: Module Federation & Terminus (ABM Platform)

Developed a universal tool for Module Federation, enabling the construction of complex
microfrontend applications across different build systems (Rollup, Vite, Esbuild).
Built plugins using unjs to streamline multi-platform deployment.
Contributed to a complex Account-Based Marketing (ABM) platform using Angular and Nx for
monorepo management.
Improved platform functionality and ensured high unit test coverage with Jest and Cypress e2e
tests.
Tech Stack: Angular 14, TypeScript, RxJs, NgRX, Nx, Jest, Cypress.

Trinetix | Front-end Developer

April 2018 — October 2020

Led the migration of a major application from AngularJS to Angular v2+.
Implemented Azure Active Directory authorization using the MSAL library.
Developed new features, performed refactoring, and optimized frontend performance.
Tech Stack: Angular 2+, AngularJs, RxJs, NgRX, Nx, TypeScript.

Mobilunity | Full Stack Developer

July 2017 — April 2018

Developed and deployed full-stack solutions including RESTful APIs and authentication mechanisms
(OAuth).
Created browser extensions and optimized connections between extensions and web pages.
Developed and deployed Android applications.
Managed application deployment using Docker, Kubernetes, and Gitlab CI.
Tech Stack: React, NestJS, Node.js, Docker, Kubernetes, Gitlab CI.

Contentum Development | Full-stack Developer

July 2011 — July 2017

• Designed and developed various backend solutions, including database architecture and API
development.
• Developed data collection systems using Selenium and integrated Facebook/Twitter/LinkedIn APIs.
• Optimized database performance and request times for large-scale projects using MySQL,
Memcache, and Elasticsearch.
• Built email template modules and subscriber management APIs.
• Designed and developed diverse projects using Yii, Symfony, and Django.
• Tech Stack: Yii, Symfony, Django, Angular, MySQL, PostgreSQL, MongoDB, Redis, Elasticsearch.

EDUCATION
Master of Computer Science

Kryvyi Rih National University, Faculty of Information Technologies

(2000 — 2015)