Bogdan Crisan, Developer in Paris, France
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Bogdan Crisan

Verified Expert  in Engineering

Software Developer

Paris, France
Toptal Member Since
June 14, 2022

Bogdan is an up-and-coming software engineer with excellent knowledge of back-end development. He understands Linux and uses multiple programming languages, including Java, TypeScript, PHP, and Rust. Bogdan also has experience working with front-end web frameworks like Angular and React and is passionate about his work and learning new things.


Haven's Kitchen
PHP, SlimPHP, Elasticsearch, Shopify, Headless Software, CSS, HTML, JavaScript...
Accelerated Data Works
PostgreSQL, Google API, PHP, Angular, SQL, Lisp, Python, Relational Databases...
Université de Paris
Research, Productivity, Collaboration, Python, Rust, TypeScript, Git...




Preferred Environment

Linux, Vim Text Editor, Visual Studio Code (VS Code)

The most amazing...

...project I've developed is a computerized maintenance management system (CMMS) for a hospital.

Work Experience

PHP Developer

2022 - PRESENT
Haven's Kitchen
  • Implemented a new Find in Store feature on the product page using Destini. Added a Google Analytics tracker to track the users who used the locator.
  • Created a new video component to integrate YouTube videos into product and blog pages.
  • Migrated codebase from Universal Analytics to Google Analytics 4.
  • Added new triggers and events using Google Tag Manager.
  • Fixed multiple bugs and improved user experience to convert the maximum amount of customers.
Technologies: PHP, SlimPHP, Elasticsearch, Shopify, Headless Software, CSS, HTML, JavaScript, Liquid, Shopify API, Contentful, eCommerce, Full-stack Development, Google Analytics 4, Google Analytics, Google Data Studio, Google Tag Manager, User Experience (UX), User Interface (UI), Programming, CI/CD Pipelines, Back-end, Front-end, Git, GitHub, HTML5

Senior Software Engineer

2022 - PRESENT
Accelerated Data Works
  • Added a feature to see which houses produce electricity using solar panels on a map from Google Maps to a web application written in Lisp and HTML/JavaScript.
  • Updated a database containing millions of entries with new electricity usage queried from an API.
  • Fixed multiple bugs in a legacy project written in Lisp.
Technologies: PostgreSQL, Google API, PHP, Angular, SQL, Lisp, Python, Relational Databases, JavaScript, Full-stack, Full-stack Development, API Integration, Energy Monitoring, Renewable Energy, Utility APIs, Programming, Bash, Back-end, Front-end, HTML5


2022 - 2022
Université de Paris
  • Performed research on developer networks. Read state-of-the-art publications on the subject and made directed weighted graphs between developers, showing their collaboration and how it impacts their performance.
  • Conducted research about ontology and patterns. Studied different collaboration patterns and classified them, establishing an ontology for collaboration patterns.
  • Researched developer productivity and effort. Created a methodology to measure a file's difficulty and evaluate the effort it took a developer to code a particular commit.
  • Built a script to query millions of entries from the GitHub GraphQL API to create links between developers who collaborated.
Technologies: Research, Productivity, Collaboration, Python, Rust, TypeScript, Git, Data Science, GraphQL, Data Visualization, Programming, JavaScript, GitHub, Software Design, Software Architecture, JavaScript Libraries

Full-stack Developer

2020 - 2022
  • Developed a mobile application and a server for searching and publishing highly-categorized tutorials.
  • Built a computerized maintenance management system (CMMS) back-end and front-end software used by over 200 enterprise clients. Included multiple features such as inventory management, bill generator, revenue tracker, and calendar.
  • Developed a restaurant menu application for Android and iOS used by hundreds of restaurants to serve their menus in a COVID-19-friendly way.
  • Automated a backup system for crucially important user data with the possibility of rollbacking to any point within a two-week window.
  • Set up multiple servers, including a development server, production server, Gitea for Git hosting, and Jenkins for CI/CD.
Technologies: JavaScript, TypeScript, PHP, Linux Server Administration, Node.js, Back-end, Front-end, Web Development, Architecture, DevOps, Android, iOS, React Native, Restaurants & Dining, Inventory Management, Billing Systems, Time Management, Calendars, Cordova, UI Design, UX Design, Docker, Full-stack Development, Redux, User Experience (UX), User Interface (UI), Rx, Linux, Programming, Algorithms, SQL, Rust, Bash, CI/CD Pipelines, Express.js, Git, PostgreSQL, CSS, HTML, Google Cloud Platform (GCP), REST APIs, GitHub, WebSockets, Jest, OpenAPI, Gitea, JSON Web Tokens (JWT), Software Design, Software Architecture, Leadership, CRM APIs, JavaScript Libraries, HTML5, FastAPI, Ubuntu

Administrative Helper

2021 - 2021
Vincennes' Town Hall
  • Wrote SQL queries to optimize the workflow of other employees, saving them over 400 hours of work per year.
  • Developed automated scripts that helped collect and transform data of over 100,000 students for insertion into Excel and other software.
  • Created Excel templates to process data extracted by my other tools.
Technologies: SQL, Excel 365, Automation, Web Scraping, Data Visualization, Programming, Bash

Deno Lint – A JavaScript and TypeScript Linter (80,000+ GitHub Stars)
Implemented a new linting rule called no-literal-boolean-arguments, which forbids Boolean literal arguments in function calls. The project is an open-source linter for JavaScript, TypeScript, and Deno. In addition, I implemented new features requested by the users.

Computerized Maintenance Management System

Built a CMMS engine and web interface used by over 200 enterprise clients, including hospitals. The project features include dynamic, reactive, and validated forms, an advanced authorization system, and per-user and per-company customization.

Online Drawing Tool

A web application that lets you draw with your friends on a web page. The front end is written using React, while the back end is coded in Rust. This duo uses WebSockets to send and receive real-time data about what other people are doing on the canvas. The front end relies on HTML canvases for drawing. The application is fully featured.

Some of the features are:
• History with multiple undo and redo
• Layers
• Brush size and color
• Live cursor of other people
• Zoom
• Scaling of the drawing

Developed a web-based Scrabble game called sCRBle to play Scrabble with my friends because there were no free options available. It is a simple server-client game. Anyone can start a server, create a room, and invite their friends, both online and in local mode.

Repair App

Created a forum-like cross-platform application for iOS and Android. Users can post and search for solutions to problems they encounter on specific devices. I implemented the full-text search, category search, and indexation for fast response time and real-time search completion.

Remote Mouse
Built the Node.js application to remotely control my computer using a phone. I was the sole developer on the project and created it for personal use. The phone can be used as a trackpad, keyboard, or gamepad.

Social Media

A PHP frameworkless social network. It has completed features like followers, hashtags, custom profile pages, themes, real-time DMs, pools, etc. I built this personal project using PHP, JavaScript, and some SQL (on MySQL), and I hosted it on Azure.
2020 - 2022

Bachelor's Degree in Computer Science

University of Paris - Paris, France


Node.js, REST APIs, OpenAPI, React Navigation, Google API, React, Chart.js, Liquid, Shopify API


Git, GitHub, Apache, GitHub Pages, Canvas, Photoshop CC, Gradle, Jenkins, Utility APIs, Google Analytics


Angular, NestJS, Express.js, JSON Web Tokens (JWT), React Native, Jest, Angular Material, Selenium, Rx, Redux


Java, JavaScript, TypeScript, PHP, SQL, Rust, CSS, HTML, Regex, Python, CSS3, HTML5, C, Bash, Lisp, GraphQL, Object-oriented JavaScript (OOJS)


Unit Testing, REST, Agile Project Management, DevOps, Agile, Data Science, Automation, Object-oriented Programming (OOP), Object-oriented Design (OOD), UI Design, UX Design, Microservices


Linux, LAMP, Ubuntu, Mobile, Google Cloud Platform (GCP), Linode, Azure, iOS, Android, Shopify, Contentful, Docker


PostgreSQL, MariaDB, JSON, Relational Databases, MySQL, SlimPHP, Elasticsearch


Programming, Algorithms, Back-end, Front-end, TypeORM, Actix Web, Deno, WebSockets, Gitea, APIs, Web Development, Full-stack, Ajax, User Experience (UX), User Interface (UI), Data Visualization, JavaScript Libraries, Linux Server Administration, Architecture, Web Scraping, Gimp, Software Design, Software Architecture, Leadership, FastAPI, CI/CD Pipelines, Research, Productivity, Collaboration, Mobile App Development, Restaurants & Dining, Inventory Management, Billing Systems, Time Management, Calendars, Excel 365, Games, Cordova, Headless Software, eCommerce, Full-stack Development, API Integration, Energy Monitoring, Renewable Energy, Google Analytics 4, Google Data Studio, Google Tag Manager, Responsive UI, CRM APIs

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