Олександр

Oleksandr Vakulinskyi
FULL-STACK ENGINEER
[open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)

Summary
Full-Stack Engineer with nearly 5 years of commercial experience building SaaS products with JavaScript, Node.js, React,
and PostgreSQL. Experienced in Stripe subscription systems, APIs and integrations, AWS, Docker, and AI-assisted
engineering workflows with custom Cursor AI Skills.

Skills
Languages: JavaScript, TypeScript, SQL, HTML, CSS
Frontend & Backend: React, Redux, Node.js, Express
Data, Cloud & Integrations: PostgreSQL, Redis, AWS, Docker, Stripe, OAuth 2.0, Google APIs, Apigee

Experience
Interlink | Full-Stack Developer
Oct 2021 – Present
Outsource / Outstaff software development company delivering SaaS products for international clients.

Client Projects
Apigee Proxy Development Mar 2026 – Jun 2026
Full-Stack Developer (Apigee / JavaScript / Cursor)
• Created custom Cursor AI skills from scratch to automate Apigee proxy creation from Jira requirements, including logic
for choosing between real and mocked backend integrations
• Developed and updated Apigee proxies, implementing API integrations and backend routing based on project
requirements

No-Code Mobile & Web App Builder Aug 2024 – Mar 2026
Full-Stack Developer (TypeScript / React / React Native / Node.js / PostgreSQL / Stripe / AWS / build.io)
• Built a standalone Laravel application that converts Google Sheets into REST API endpoints via Google OAuth,
restructuring the initial codebase around DDD principles while learning Laravel during development
• Co-designed and implemented an upgrade to subscription-based feature gating, adding tiers, changing pricing, and
updating plan-specific functionality
• Led backend and Stripe changes for subscription updates, reviewing frontend behavior and implementing required UI
updates
• Designed and implemented Continental discount logic end-to-end based on user location and payment method,
automatically applying promotional codes through Stripe
• Implemented subscription-based cluster assignment, routing users to paid or free infrastructure based on subscription tier
• Reviewed and executed existing migration scripts for a database-cluster migration involving millions of records,
validating fallback behavior

Active Directory & Office 365 Management SaaS Aug 2022 – Jul 2024
Full-Stack Developer (TypeScript / React / Node.js / PostgreSQL / Stripe / Segment)
• Co-designed and built subscription-based access control, determining available features and infrastructure based on
subscription type and purchased add-ons
• Built Active Directory reporting features end-to-end, researching competitor reports and missing customer-facing reports
and implementing them through Azure AD APIs and PowerShell
• Designed and implemented product analytics with Segment, researching event tracking patterns and defining events for
plan selection, interactions, and payment completion
• Designed and implemented role-based privilege and permission gates driven by the user's active subscription and
purchased add-ons

Corporate Website Jul 2022 – Aug 2022
Full-Stack Developer (PHP / HTML / CSS / Bootstrap / WordPress)
• Developed a responsive corporate website using WordPress, PHP, JavaScript, HTML, and CSS

Freelance Content Marketplace Platform Oct 2021 – Jul 2022
Full-Stack Developer (Ruby on Rails / Vue.js / PostgreSQL / MongoDB / Stripe)
• Refactored Stripe pricing logic in a Ruby on Rails SaaS backend into a standalone module, simplifying
subscription-related code

Education
Bohdan Khmelnytsky National University of Cherkasy Cherkasy, Ukraine
Bachelor of Science, System Analysis June 2022

Languages
Ukrainian — Native English — Upper Intermediate