Alexandru Gavrilov
Verified Expert in Engineering
Web API Developer
Constanța, Constanța County, Romania
Toptal member since November 21, 2017
Alex is a senior full-stack engineer specializing in high-performance WooCommerce ecosystems and complex API integrations. With 10+ years of experience, he can architect high-availability and redundancy WordPress environments for high-traffic stores, focusing on database optimization (Redis/Object Cache Pro), advanced caching (FlyingPress/Cloudflare Enterprise), and seamless third-party synchronizations. He provides custom plugin development and secure, GDPR-compliant data handling.
Portfolio
Experience
- Web API - 9 years
- Client Portals - 7 years
- VUEjs web user interfaces - 6 years
- Amazon S3 (AWS S3) - 6 years
- Server-side PDF Generation - 6 years
- WooCommerce - 6 years
- Docker - 3 years
- Linux - 3 years
Preferred Environment
PhpStorm, Linux, KVM/Qemu, Postman, MacOS, Gemini, Claude Code
The most amazing...
...app I built integrates complex SOAP/REST APIs, allowing brokers to compare insurance policies across providers and secure the best client offers.
Work Experience
WooCommerce Architect
Online Freelance Agency
- Customized Elasticsearch integrations to handle complex search queries in WooCommerce, improving search relevancy and site speed.
- Architected a background processing tool for 60,000+ localized products, utilizing task queues to prevent server timeouts and ensure data consistency.
- Engineered an app that uses the Google Calendar API to sync data for a car wash booking platform.
- Contributed to a management system for a health clinic. Created a JavaScript UI calendar to manage appointments, charge customers, and generate invoices and receipts. The system also generates reports based on complex rules.
- Built a secure, high-throughput REST API for server-side PDF generation using HMAC SHA256 authentication for enterprise data integrity.
Full-stack Developer
JML Network SRL
- Specialized in eCommerce websites built with WooCommerce and various extensions.
- Actively participated in code review, Scrum methodology, and project architecture.
- Performed responsiveness and cross-browser testing.
- Integrated complex web services APIs like Insurance companies Rest and SOAP web services, Google APIs, Elastic Search API, Payment Gateways, and Microsoft Drive API.
Developer
Airborne Labs International Inc.
- Generated QR codes that redirect to official PDF files.
- Integrated the AWS S3 API so that we can securely upload/retrieve documents.
- Developed the client dashboard, where users have access to their company documents.
- Built a custom user hierarchy structure with specific privileges.
- Automated email notifications by generating custom email content and sending it to specific recipients.
Full-stack Web Developer
SIMBA
- Developed and deployed .NET web apps on IIS servers.
- Contributed to a number of insurance companies' web services developed with SOAP, REST, WSDL, and WSS.
- Taught junior developers the technological stack we were using and increased their coding skills.
- Gained knowledge in money flow, invoicing, financial sector for insurance brokers, and different problem-solving skills this activity creates.
Web Developer
ProWebMedia
- Developed web apps. Coded and advised on tech stack, UX flow, and functionalities development.
- Defined project architecture.
- Created different types of websites including eCommerce, portfolios, and blogs.
Experience
Orbit.law
https://orbit.law• Built an onboarding tool for clients to join investment funds.
• Built a back-end portal to manage onboarding entries and customers.
• Wrote E2E tests.
• Generated PDFs from user-inputted entries.
• Provided the ability to edit/recreate onboarding entries.
• Used Amazon S3 bucket to securely store files
TSA Management System
https://worldavsec.comSpecial features include:
• A back-end app for users to manage their relations, documents, and assets
• A front-end theme built with Gutenberg blocks and ACF, using simple assets and markup so that the content size is optimised
• HTML to PDF generation
• Built a wizard to help the client setup their company
React Customizer App
Djanggo — Money Transfer Platform
Functionalities:
• Account top-up using credit card
• Transfer funds via phone numbers
• Webcam/phone cam ID scanning
Full-stack WooCommerce Marketplace
Special features include:
• Custom checkout workflow
• PDF invoicing
• Chat app running on Node.js and Socket.IO that allows clients and vendors to connect after a purchase is made.
Insurance Management Tool
https://esimba.ro/The app also features a complex management system that allows brokers to centralize all of their company's activities like:
• The hierarchical structure of their employees
• Money flow, billing, restrictions, reports
• Legal documents generation, electronic signatures, and secure files NAS storage
Online Booking Platform for Transport Services
https://www.2address.euSchool Management System | Import Tool
https://gradelink.comEducation
Master's Degree in Computer Engineering
Ovidius University - Constanta, Romania
Certifications
Mathematics and Informatics
Ovidius University Constanta
Skills
Libraries/APIs
Web API, jQuery, REST APIs, WordPress API, Stripe, WordPress REST API, Google Maps API, Google Calendar API, X (formerly Twitter) SDK, Node.js, React Router, Facebook SDK, React, Socket.IO, PayPal API, BuddyPress, LocalStorage
Tools
WPBakery, WP-CLI, Advanced Custom Fields (ACF), Figma, Let's Encrypt, NGINX, PhpStorm, KVM/Qemu, Git, wkhtmltopdf, Google Analytics, NPM, Composer, Upsource, Webpack, SourceTree, Jira, PuTTY, Postman, Gutenberg Editor, Gravity Perks, Claude Code
Languages
PHP, ECMAScript (ES6), HTML, JavaScript 6, SQL, CSS, JavaScript, HTML5, Sass
Frameworks
Vanilla JS, Mockery, Bootstrap 3, Redux, PHPUnit, Laravel, Bootstrap, Flux, Express.js
Platforms
WooCommerce, WordPress, Linux, Docker, Amazon Web Services (AWS), Windows, Linode, Ubuntu, CentOS 6, MacOS
Storage
WP Engine, Elasticsearch, LAMP Server, Amazon S3 (AWS S3)
Paradigms
Model View Controller (MVC), Microservices Architecture, Responsive Layout, Scrum, Agile Software Development, DevOps, Design Patterns
Other
Marketplaces, WordPress Plugins, eCommerce, Full-stack, Content Management Systems (CMS), Email Authentication, Custom Post Types, Custom WordPress, Dom Manipulation, Web Services, APIs, Linux Servers, Dokan, SSH, PSD to WordPress, PSD to HTML, Flux Architecture, WordPress Themes, API Integration, myCred, Code Architecture, Domain-driven Design (DDD), General Data Protection Regulation (GDPR), Web Security, Leadership, Performance, Headless Software, PDF, Architecture, Figma to WordPress, Headless CMS, SMTP, VUEjs web user interfaces, Responsive UI, Cross-browser Compatibility, JavaScript Libraries, Server-side PDF Generation, Cloud, Payment Gateways, Multithreading, SOAP, EF6 Code First, Site Speed Optimization, RESTful Web Services, Pop!_OS, Gravity Forms, CSV File Processing, Repository Pattern, Single Sign-on (SSO), Security, Client Portals, Cloud Engineering, QR Codes, Mathematics, Headless WordPress, Gemini
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