Leonard is available for hire
Hire LeonardLeonard Hîrja
Verified Expert in Engineering
Full-stack Developer
Bologna, Metropolitan City of Bologna, Italy
Toptal member since July 14, 2021
Bio
Leonard is a senior full-stack developer with more than six years of experience. He has a wide area of expertise, including software architecture, eCommerce development, API development, and UX development. He has also participated in writing a book covering Pimcore, due to be published in July 2021.
Portfolio
Miniweight SAS
Shopify API, Shopify Design, Shopify Customizations, Shopify Plus...
Cloudus SRL
PHP, Laravel, Pimcore, Symfony, Magento, Shopify, MySQL, APIs, Vue, MariaDB...
WisewellWater LLC
Stripe, Stripe API, Stripe Connect, Full-stack, eCommerce, Zoho, Next.js, React...
Experience
- PHP - 10 years
- Programming - 10 years
- Laravel - 9 years
- Agile - 8 years
- APIs - 7 years
- Vue - 6 years
- Shopify - 5 years
- Pimcore - 3 years
Work Experience
Full-stack Shopify Developer
2025 - PRESENT
Miniweight SAS
- Architected and developed the solution for including a custom-made Shopify application for integrating changes in the customer area.
- Changed the order page and the orders page inside the customer area to have access to submit and read sample results.
- Integrated and implemented Shopify customizations for checkout shipping carrier prices.
Technologies: Shopify API, Shopify Design, Shopify Customizations, Shopify Plus, Custom Shopify Apps, Shopify, APIs, JSON Web Tokens (JWT), General Data Protection Regulation (GDPR), Laravel, Node.js, Bun, Responsive Web Design (RWD), CTO
Software Architect
2017 - PRESENT
Cloudus SRL
- Developed an eCommerce solution that handles hundreds of requests per second.
- Successfully oversaw the launch of over 12 eCommerce websites.
- Developed automatic integrations between the eCommerce site and warehouse management, invoice management, shipment management, and other third-party software.
Technologies: PHP, Laravel, Pimcore, Symfony, Magento, Shopify, MySQL, APIs, Vue, MariaDB, HTML, HTML5, JavaScript, CSS, SCSS, Sass, React, REST APIs, Liquid, Front-end, API Integration, Firebase, Azure, SQL, Custom Shopify Apps, Shopify Customizations, Shopify Plus, Shopify Theme, Custom Themes, Responsive UI, Vanilla JS, Amazon Web Services (AWS), Software Architecture, eCommerce, Laravel Livewire, Alpine.js, PostgreSQL, Team Leadership, Document Design, Inventory Management Systems, Technical Writing, Inertia, Interviews, Redux, CSS5, Symphony, Web Development, Node.js, Next.js, PHP 7, Design Patterns, Unit Testing, Front-end Development, Communication, Data Structures, GraphQL, Web Scraping, Integration, Three.js, eCommerce APIs, SDKs, Full-stack, Back-end, Payment Gateways, Stripe, Heroku, Figma, Vue 2, GitLab, Consulting, Xero, Vuetify, Mapbox, Turf.js, CTO, Technical Architecture, Technical Leadership, Vue 3, Pinia, Application State Management, User Interface (UI), TALL Stack, OpenAI, Shopify Design, Shopify Liquid, Vue Storefront, Full-stack Development, React Native, Responsive Web Design (RWD), CTO, Financial Transactions
Full-stack and Stripe Expert
2026 - 2026
WisewellWater LLC
- Designed and applied the anti-fraud system with utmost urgency.
- Managed a distributed team from 4 countries to migrate the eCommerce from custom-based to Shopify.
- Revised and implemented the automatic shipping integration with hold status payments and the underlying logic.
Technologies: Stripe, Stripe API, Stripe Connect, Full-stack, eCommerce, Zoho, Next.js, React, Full-stack Development, TaxJar, TaxJar API, Zoho CRM, Shopify
Laravel Developer
2025 - 2026
Stepping Stone Loans LLC
- Researched and designed the architecture for a fully async marketing platform custom-built for Loans.
- Improved and refactored central parts of the system to support and structure the marketing system described above.
- Designed and improved the Distributed System to support and allow for as high a concurrency as possible.
Technologies: PHP, Laravel, Payment APIs, ACH Payments
Full-stack Developer
2025 - 2026
Edgar Gabriyelyan
- Migrated the platform to a better integrated DevOps and Infrastructure.
- Improved every single page and analyzed queries. Added caching and enhanced overall performance.
- Added and improved social integration and webhooks. Added AI integration for transcripts, messages, and suggestions.
Technologies: Laravel, React, Envoyer, Cloudflare
Laravel Developer
2025 - 2025
Jacobs Anderson Ltd
- Acted as the tech lead in developing the learning platform for improving mental health called "Tackle your Feelings".
- Implemented from scratch the course reviewing system and prepared it to scale.
- Reviewed the requirements and formulated the technical solution for later improvements, and added standards and best practices as a requirement.
- Provided an overview and review of the DevOps infrastructure for continuous integration (CI) and continuous deployment (CD).
Technologies: Laravel, HTML, JavaScript, PHP, MySQL, CSS, Responsive Web Design (RWD), CTO, Financial Transactions
Senior Vue Developer
2024 - 2025
Advantien Surgical Solutions LLC
- Analysed complex requirements from the medical domain and provided guidance and solutions for moving forward with the project.
- Architected the data structures and APIs for integrating a headless front end.
- Prepared the DevOps environment and processes for successful CI/CD releases.
Technologies: Vue, JavaScript, Nuxt.js, PostgreSQL, OAuth, Algolia, Supabase, Laravel, Responsive Web Design (RWD)
PHP Developer
2023 - 2024
PepsiCo Global - Main
- Served as the tech lead in developing applications for integrating Dynamic Yields and other 3rd-party solutions.
- Reviewed and architected solutions for the PDP and Collection pages.
- Managed and supervised pull requests and team collaborations to ensure successful teamwork.
Technologies: PHP, Shopify API, GraphQL, Laravel, TypeScript, React, Bun, Node.js, Responsive Web Design (RWD), CTO, Financial Transactions
Shopify developer for a custom payment gateway integration
2023 - 2024
BuyFSA Inc
- Designed and implemented the solution to process payments for a custom gateway and include it as a the only payment method in Shopify Checkout.
- Implemented processes and guidelines for future development and DevOps.
- Managed the entire process of developing a custom Shopify App with the API integration of payments.
Technologies: Shopify, Shopify API, Back-end, Payment Gateways, Full-stack, Liquid, Online Payments, POS, Laravel, Vue, DevOps, Responsive Web Design (RWD), CTO, Financial Transactions
PHP Lead
2023 - 2023
Next Jump Inc.
- Managed the team of four people to provide top quality and on-time deployments.
- Analyzed, documented, and implemented an upgrade of a very large eCommerce to PHP 8.2.
- Refactored and added overall improvements to the system as per migration requirements.
Technologies: PHP, PHP 7, Docker, Architecture, Zend Framework, Three.js, eCommerce APIs, SDKs, Full-stack, Back-end, Payment Gateways, Stripe, Heroku, Figma, Vue 2, GitLab, Consulting, Xero, Vuetify, Mapbox, CTO, Technical Architecture, Technical Leadership, Vue 3, Pinia, Application State Management, User Interface (UI), TALL Stack, OpenAI, Full-stack Development, Responsive Web Design (RWD), CTO
PHP/Laravel Developer
2023 - 2023
Stubben Edge Group Limited
- Led a team of six people to complete the client's business requirements and provide feature releases on time. I was also one of the main code pull requests reviewers.
- Collaborated with other department's leads to scope, document, and offer extensive feedback in the feature's lifecycle.
- Refactored and migrated over 50,000 lines of code to the new Laravel standards, writing extensive tests and documentation.
Technologies: Laravel, PHP, JavaScript, React, TypeScript, Team Leadership, Technical Writing, Redux, CSS5, Symphony, Web Development, Node.js, Next.js, PHP 7, Design Patterns, Unit Testing, Front-end Development, Communication, Data Structures, GraphQL, Web Scraping, Integration, Three.js, eCommerce APIs, SDKs, Full-stack, Back-end, Payment Gateways, Stripe, Heroku, Figma, Vue 2, GitLab, Consulting, Xero, Vuetify, Mapbox, CTO, Technical Architecture, Technical Leadership, Vue 3, Pinia, Application State Management, User Interface (UI), TALL Stack, OpenAI, Full-stack Development, Responsive Web Design (RWD), CTO
Technical Writer
2022 - 2023
Retrac Inc dba Think Safe Inc
- Prepared software documentation practices and workflows for three of their projects, providing detailed insight into security, database architecture, and code status.
- Participated in pull request reviews to ensure high-quality code was being pushed to production.
- Worked on fixing bugs for multiple platforms and provided feedback on the work processes.
Technologies: Technical Writing, PHP, JavaScript, MySQL, Laravel, Laravel Voyager, Laravel Forge, Vue, Inertia, Interviews, Team Leadership, Software Architecture, PostgreSQL, Document Design, Amazon Simple Email Service (SES), Amazon DynamoDB, Amazon Simple Queue Service (SQS), AWS Elastic Beanstalk, Amazon EC2, Amazon S3 (AWS S3), CSS5, Symphony, Web Development, Node.js, PHP 7, Design Patterns, Unit Testing, Front-end Development, Communication, Data Structures, GraphQL, Integration, Three.js, eCommerce APIs, SDKs, Full-stack, Back-end, Payment Gateways, Stripe, Heroku, Figma, Vue 2, GitLab, Consulting, Xero, Vuetify, Mapbox, Turf.js, CTO, Technical Architecture, Technical Leadership, Vue 3, Pinia, Application State Management, User Interface (UI), TALL Stack, Vue Storefront, Full-stack Development, Responsive Web Design (RWD)
Senior Back-end Engineer
2022 - 2022
4K.com Corporation
- Documented entire API documentation using Swagger to prepare the future platform integration.
- Worked and analyzed in providing a solution for working with Blockchain shipments.
- Provided constant feedback and kept an open dialog with the client to have transparent results.
Technologies: Shopify, Shopify API, WooCommerce API, Inventory Management Systems, WooCommerce, APIs, Web3.js, Software Architecture, Document Design, Technical Writing, CSS5, Symphony, Web Development, Node.js, PHP 7, Design Patterns, Unit Testing, Front-end Development, Communication, Data Structures, GraphQL, Web Scraping, Integration, Three.js, eCommerce APIs, SDKs, Full-stack, Back-end, Payment Gateways, Stripe, Heroku, Figma, Vue 2, GitLab, Consulting, Xero, Vuetify, Mapbox, Technical Leadership, Vue 3, Pinia, Application State Management, User Interface (UI), TALL Stack, Shopify Design, Full-stack Development, Responsive Web Design (RWD)
Back-end Developer
2022 - 2022
Bx Data Inc.
- Analyzed the old code and managed to create a specific use case path for development.
- Documented and built the architecture of the platform.
- Successfully migrated the code from an old platform to Laravel.
Technologies: Laravel, MySQL, Vue, Amazon Web Services (AWS), Software Architecture, Team Leadership, Document Design, Technical Writing, Inertia, Interviews, CSS5, Symphony, Web Development, Node.js, PHP 7, Design Patterns, Unit Testing, Front-end Development, Communication, Data Structures, GraphQL, Web Scraping, Integration, Three.js, eCommerce APIs, SDKs, Full-stack, Back-end, Payment Gateways, Stripe, Heroku, Figma, Vue 2, GitLab, Consulting, Xero, CTO, Technical Leadership, Vue 3, Pinia, Application State Management, User Interface (UI), TALL Stack, Shopify Design, Full-stack Development, Responsive Web Design (RWD)
Senior Full-stack Developer
2021 - 2022
St. Jude Cloud
- Developed a headless Chrome integration to automatically generate thumbnails of third-party visualizations.
- Worked on improving and refactoring the code and providing feedback on every pull request.
- Reviewed primary reference source for optimal deployment.
- Implemented the viz editor for the viz.stjude.cloud.
- Contributed to the migration and development of the new platform under pecan.stjude.cloud.
Technologies: PHP, Laravel, Vue, Laravel Livewire, Alpine.js, CSS, Nova, Amazon Web Services (AWS), PostgreSQL, Team Leadership, Document Design, Software Architecture, Technical Writing, Interviews, Amazon DynamoDB, Amazon S3 (AWS S3), Amazon EC2, CSS5, Symphony, Web Development, Node.js, Next.js, PHP 7, Design Patterns, Unit Testing, Front-end Development, Communication, Data Structures, GraphQL, Web Scraping, Integration, Three.js, eCommerce APIs, SDKs, Full-stack, Back-end, Payment Gateways, Stripe, Heroku, Figma, Vue 2, GitLab, Consulting, Xero, Vuetify, Mapbox, Turf.js, Technical Architecture, Technical Leadership, Vue 3, Pinia, Application State Management, User Interface (UI), TALL Stack, Shopify Liquid, Vue Storefront, Full-stack Development, React Native, Responsive Web Design (RWD)
Vue Developer
2021 - 2021
Falcon Brands Inc
- Analyzed the old framework collaborating with the client to understand the path forward using Event Sourcing.
- Participated in the pull request reviews to improve and ensure a high-quality code being merged.
- Took part in product management by brainstorming fixes and possible features.
Technologies: Tailwind CSS, Vue, API Development, API Integration, Amazon Web Services (AWS), Architecture, Nuxt.js, Software Architecture, eCommerce, Document Design, Inventory Management Systems, Technical Writing, CSS5, Symphony, Web Development, Node.js, Next.js, PHP 7, Design Patterns, Unit Testing, Front-end Development, Communication, Data Structures, GraphQL, Integration, Three.js, eCommerce APIs, SDKs, Full-stack, Back-end, Payment Gateways, Stripe, Heroku, Figma, Vue 2, GitLab, Consulting, Xero, Vuetify, Mapbox, Turf.js, Technical Leadership, Vue 3, Pinia, Application State Management, User Interface (UI), Shopify Design, Shopify Liquid, Vue Storefront, Full-stack Development, React Native, Responsive Web Design (RWD)
Senior Front-end Developer
2021 - 2021
Stratta Creative Inc O/A pb+j
- Worked on developing two Shopify's from scratch.
- Fixed bugs from three websites and developed a few more features.
- Integrated Shopify app to provide optimal results.
Technologies: Shopify, Shopify API, CSS, HTML, Liquid, JavaScript, Sass, Custom Shopify Apps, Shopify Customizations, Shopify Plus, Shopify Theme, Custom Themes, Responsive UI, Vanilla JS, Software Architecture, Document Design, Technical Writing, CSS5, Symphony, Web Development, Node.js, Next.js, PHP 7, Design Patterns, Unit Testing, Front-end Development, Communication, Data Structures, GraphQL, Integration, Three.js, eCommerce APIs, SDKs, Full-stack, Back-end, Payment Gateways, Stripe, Heroku, Figma, Vue 2, GitLab, Consulting, Xero, Vuetify, Mapbox, Turf.js, CTO, Technical Architecture, Technical Leadership, Vue 3, Pinia, Application State Management, User Interface (UI), Shopify Design, Shopify Liquid, Vue Storefront, Full-stack Development, Responsive Web Design (RWD)
Project History
Aiteca
A Magento 2 store with multiple integrations for different product information management (PIM) and digital asset management (DAM) data. I've actively participated in developing the back end and front end of this website and managed a team of two people while working on it.
To manage the PIM and DAM, I've also worked on developing the dashboard using Pimcore. This allows for async data and a friendlier user interface for such actions.
To manage the PIM and DAM, I've also worked on developing the dashboard using Pimcore. This allows for async data and a friendlier user interface for such actions.
Headless eCommerce Algolia
The project centered around integration between the DAM and PIM and Algolia to allow the headless eCommerce to interact with the products without connecting to the slow Shopify API.
I was in charge of the development of the architecture and the core features of the integration. I was a key team member when it came to problem-solving and understanding future needs.
I was in charge of the development of the architecture and the core features of the integration. I was a key team member when it came to problem-solving and understanding future needs.
Automatic Warehouse Management
A web app in charge of managing and overseeing shipments and warehouse inventory status. The app's main focus was handling concurrency requests upon the inventory and ensuring multiple shops connected through API are live updated.
I was the lead developer in preparing the architecture and writing the functional analysis.
I was the lead developer in preparing the architecture and writing the functional analysis.
Education
2016 - 2017
Bachelor's Degree in Computer Science
Vrije Universiteit Amsterdam - Amsterdam, Netherlands
2014 - 2016
Academy Profession (AP) Degree in Computer Science
UCN - Aalbord, Denmark
Certifications
MAY 2021 - MAY 2022
Pimcore Enterprise Developer
Pimcore
Skills
Libraries/APIs
Vue, Shopify API, API Development, REST APIs, Liquid, Three.js, Vue 2, React, Inertia, Node.js, Stripe, Vue 3, WooCommerce API, Web3.js, Laravel Voyager, Turf.js, Stripe API, Stripe Connect
Tools
Xero, Shopify Plus, Figma, GitLab, Amazon Simple Email Service (SES), Amazon Simple Queue Service (SQS), Envoyer
Languages
PHP, HTML, HTML5, JavaScript, CSS, SQL, PHP 7, Shopify Liquid, SCSS, Sass, TypeScript, GraphQL
Frameworks
Laravel, Symfony, Vuetify, React Native, Tailwind CSS, Laravel Livewire, Alpine.js, Vanilla JS, Redux, Next.js, Nuxt.js, Nova, Zend Framework, JSON Web Tokens (JWT)
Paradigms
Agile, Design Patterns, Unit Testing, Responsive Web Design (RWD), DevOps
Platforms
Pimcore, Shopify, Heroku, Mapbox, Magento, Firebase, Azure, Amazon Web Services (AWS), Algolia, WooCommerce, AWS Elastic Beanstalk, Amazon EC2, Docker, BigCommerce, TaxJar, Zoho CRM
Storage
MySQL, MariaDB, PostgreSQL, Amazon DynamoDB, Amazon S3 (AWS S3)
Other
APIs, Front-end, API Integration, Responsive UI, Document Design, Inventory Management Systems, Architecture, Technical Writing, Interviews, CSS5, Symphony, Web Development, Front-end Development, Communication, Data Structures, Web Scraping, Integration, eCommerce APIs, Full-stack, Back-end, Consulting, User Interface (UI), TALL Stack, Shopify Design, Full-stack Development, CTO, Custom Shopify Apps, Shopify Customizations, Shopify Theme, Custom Themes, Team Leadership, SDKs, Payment Gateways, CTO, Technical Architecture, Pinia, Application State Management, OpenAI, Vue Storefront, Financial Transactions, Business, System Development, Programming, Artificial Intelligence (AI), Neural Networks, Hardware, IT Networking, Web Security, PIM, eCommerce, Software Architecture, Concurrency, Laravel Forge, Technical Leadership, Product Information Management (PIM), Online Payments, POS, Bun, OAuth, Supabase, General Data Protection Regulation (GDPR), Cloudflare, Payment APIs, ACH Payments, Zoho, TaxJar API
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