Олександр

Oleksandr Vakulinskyi
[відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація») | Remote / Open to Relocation

Skills
Languages: TypeScript, JavaScript, HTML, CSS, SQL
Frontend: React, Redux, Redux Toolkit, Material UI
Backend: Node.js, Express
Databases: PostgreSQL, Redis
Cloud & DevOps: AWS (S3, RDS), Docker, GitHub Actions, CI/CD
Auth & APIs: OAuth 2.0, Google OAuth, Stripe, OpenAI API, Google APIs, SendGrid, Apigee
Analytics: Segment, Google Analytics, Facebook Pixel
Testing: Jest, Playwright, Newman, Postman, Sentry
Tools: Git, GitHub, Jira, Confluence, Cursor, WebStorm, VS Code, DBeaver
Feature Management: LaunchDarkly

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)
• Developed Cursor AI skills to automate Apigee proxy generation, producing either mock or real-backend proxies based
on provided task parameters.
• Developed a Cursor AI skill to automate Newman/Postman test generation for proxy endpoints.
• Implemented, tested, and debugged Apigee proxies across mock and real-backend configurations.

No-Code Mobile & Web App Builder Aug. 2024 – Mar. 2026
Full-Stack Developer (TypeScript / React / React Native / Node.js / PostgreSQL / Stripe / AWS / build.io)
• Worked on a major upgrade of subscription-based feature gating logic, enabling different feature sets per subscription
tier using Stripe.
• Implemented continental discount logic based on user locale and credit card information, automatically applying
promotional codes through Stripe.
• Contributed to a large-scale database cluster migration from AWS to build.io, involving millions of records; helped write
and run migration scripts with fallback handling, and worked on subscription-based cluster assignment giving paid users
access to higher-performance database clusters.
• Built and delivered a standalone web application allowing users to convert Google Sheets into REST API endpoints via
Google OAuth, with optional API protection; integrated the service with the main platform so users could connect their
sheets as a database source for their built apps.
• Managed feature flag rollout for all new features using LaunchDarkly in line with project-wide release policy.

Active Directory & Office 365 Management SaaS Aug. 2022 – Jul. 2024
Full-Stack Developer (TypeScript / React / Node.js / PostgreSQL / Stripe / Segment)
• Built the subscription and pricing system from scratch alongside another developer, using Stripe-provided pages
(checkout, billing) where purchased subscriptions and add-ons determined user access to specific report types.
• Integrated Segment to track user behaviour on the pricing page, capturing plan selections, clicks, and payment
completion events and forwarding the data to Google Analytics, Facebook Pixel, and other connected destinations.
• Rebuilt the registration flow as a multi-step process with a modern redesign, extending the existing frontend and backend
base.
• Implemented a realistic loading and progress indicator for the Azure AD synchronisation flow, accurately reflecting the
current sync state to users.
 • Integrated Active Directory reports via Azure AD API beta routes; later extended reporting capabilities by creating
reports using PowerShell scripts.
• Updated API request validation using Joi across the Node.js backend.
• Implemented the Azure AD onboarding tab, guiding users through initial Azure AD setup within the platform.
• 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)
• Diagnosed and resolved WordPress rendering and functionality bugs, restoring cross-browser stability and ensuring
correct display of marketing pages.

Freelance Content Marketplace Platform Oct. 2021 – Jul. 2022
Full-Stack Developer (Ruby on Rails / Vue.js / PostgreSQL / MongoDB / Stripe)
• Refactored Stripe-based pricing logic for a SaaS product, extracting it into a standalone module on the Ruby on Rails
backend.
• Enhanced the product ordering flow on the Vue.js frontend, improving UI responsiveness and ordering success rate.
• Added a static code analyser (linter) and code formatter to the JavaScript codebase.

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

Languages
Ukrainian — Native English — Upper Intermediate