Personal profile

Oleksandr Oleniuk

Full Stack Engineer

About me

Every line of code tells a story, and my role at Scalified is to weave together the front-end and back-end seamlessly. For me, building full-stack solutions is like crafting a bridge where design meets functionality, ensuring every step is both elegant and reliable.

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Work experience

Full Stack Engineer
Scalified LLC
Kyiv, Ukraine | Bucharest, Romania
2017 - Present

Full-stack development: created dynamic web applications with Angular for front-end interfaces and NestJS for robust back-end services.
API design and integration: designed and implemented RESTful APIs using NestJS, ensuring smooth integration with MongoDB for scalable and efficient data management.
Payment systems integration: developed full-stack integrations with payment providers such as Stripe, PaymentWall, and Liqpay.
Testing automation: automated end-to-end testing workflows with Playwright, enhancing the reliability and speed of quality assurance processes.

Angular Developer
Scalified LLC
Kyiv, Ukraine | Bucharest, Romania
2019 - 2023

Front-end architecture leadership: designed scalable and modular front-end architectures, ensuring optimal performance for multiple projects.
API collaboration: worked closely with back-end teams to integrate APIs, achieving seamless data flow and real-time updates.
Performance optimization: enhanced application efficiency by reducing page load times and improving form responsiveness with lazy loading and code refactoring.
Reusable libraries: created Angular libraries using ng-packagr, promoting code consistency and reusability across projects.
Mentorship and reviews: guided junior developers through code reviews and best practices for Angular development.
Responsive web apps: built feature-rich, responsive web applications with Angular and Angular Material.
State management: integrated NgRx for state management, improving maintainability and performance in large-scale applications.
Reactive forms: developed reactive forms with ngrx-forms, enhancing user experience and ensuring data integrity.