A fintech startup headquartered in Dubai with clients across Europe.

Project: DCP distribution• Designed API and PostgreSQL database solution, optimizing workflows and ensuring 99.9% uptime for critical services.• Implemented Codeception testing strategy with 326 automated tests, reducing post-release bugs by 42% and enhancing stability by 80%.• Achieved a x2 reduction in unauthorized access incidents by streamlining authentication processes and enhancing security management through the integration of Keycloak for user authorization and role management, simplifying security for developers and improving overall application security.Project: Highload, multifunctional Customer Relationship Management (CRM) system• Engineered CRM features using Laravel and ReactJS, improving data processing speed by 15% and managing 24% more user load.• Wrote detailed technical documentation and user manuals, broke down complex technical processes into user-friendly instructions for end-users and stakeholders.• Created instructions for a third-party integrated library created in Rust.

Reksoft is a software engineering services provider, developed and delivered over 1000 high-end software solutions to international enterprises, ISVs, and system integrators.Project: Customer personal account• In a team with other developers, we implemented a module for booking a workplace in a coworking space. I was engaged in receiving data from the API and rendering them in React components, sending booking data and editing bookings to the backend. Thanks to the module, it was possible to reduce the downtime in coworking by 2-3 times and simplify the work of the administration.• Significantly reduced the company's dependence on third-party suppliers due to the developmentof an analytics system based on my architectural research. I analyzed the business needs for user behavioral data for business analytics, selected the appropriate technologies: a programming language (GoLang) and a database engine (Clickhouse). Conducted local testing of the solution, made a presentation of this solution n front of the business management and the technical department.• Improved user engagement by implementing an event-driven notification system. I was faced with the task of notifying users about events related to the services provided. I developed a Laravel module (PHP) that notifies the client by mail or via SMS about certain events. This allowed us to increase user engagement and app conversion by about 30%.

Project: Compel (www.electronshik.ru, www.terraelectronica.ru)• Increasing sales conversion by developing and connecting a neural network search engine. I implemented the integration of the algorithm developed by the team of machine learning and big data analysis for the search and selection from a multimillion range of goods and services. My development is a front-end JavaScript integration of data received through API, as well as sending search data and customer preferences for the selection and training of the system.• Reduced server load by 17% by tuning the database and optimizing high-load queries, got rid of database crashes in the process of updating the product range. Daily updating of the product nomenclature consisting of more than 5 million items created a high load on the database server and blocked product data. I analyzed the SQL code, the state of tables and blocking requests, implemented a number of measures to improve the continuous availability of data and reduce the load on the server.

Webway is a custom software developer, has more than 70 awards and 1400+ completed projects.Project: InFo CMS, proprietary content management system• Developed the InfORM proprietary database library on PHP and SQL, which made it possible to reduce the development time of new modules by a multiple. The system code contained a large number of SQL requests that were not placed in separate files or methods. Since the structure of the database and queries made it difficult to connect and use existing solutions, I developed an ORM. This made it possible to work with data in an object-oriented way without introducing SQL code into the application logic.• Update code quality by splitting logic and SQL-code, reduced legacy code in 40%. Replacing the SQL code with ORM queries made it possible to reduce the number of lines of code in CMS files by almost half. That simplified its support and refinement.• Implemented new Aquafon (https://www.aquafon.com/) website design templates that improved user experience and increased visitor engagement by 28%. Our team not only updated the user interface, but also changed the structure of the site, taking into account the analysis of user behavior and the priority of the site content.• Improved code coverage by 30% by writing over 60 unit and integration tests.• Designed and developed API for Crocus City Hall, which reduced the burden on the project support team.

Krasnodar mobile and web application development startup.• Spearheaded a team of developers, leading various projects and ensuring the delivery of high-quality software solutions.• Leveraged technical expertise to drive the design and implementation of complex software systems, contributing to the company's portfolio of innovative products.• Collaborated closely with clients to understand their requirements, translating these into effective software solutions that drove customer satisfaction and repeat business.• Mentored and provided technical supervision to a team of programmers, conducting code reviews and creating tech training sessions. This initiative significantly contributed to their professional growth, with several team members now holding senior positions.• Designed and implemented a robust API for a mobile application serving the Krasnodar car services network, enhancing the app's functionality and user experience.

It was a few dozen of clients and projects. I did different types of work like consult with clients, define hardware and software requirements, write and integrate web application related code, frontend and backend web development, making web design mockups.• With my participation in the development of the website and the Internet promotion of the quest rooms business in Moscow, the profit increased by about x3. I, together with a SEO specialist, have been developing a business website for about 6 months, which led to getting into the top 10 for many relevant queries and increasing the flow of customers.• I have created several open source solutions in the field of web development and server administration with web applications. I'll highlight a few of them: PhalconServer - bash helper for Phalcon developers, Faicon - react component, xfeedback and yiihost. You can find it on my GitHub account page.• Successfully developed and launched an online product catalog for Noelteh (noelteh.ru) using CMS MODx Revolution, which significantly enhanced the company's digital presence, led to an increase in sales, and boosted lead generation efforts.• I enhanced the functionality of the car inspection company website to178.ru by developing and integrating a scheduling plugin using CMS MODx Revo. This improvement streamlined the appointment booking process, significantly improved user experience, and led to an increase in service sales.• Developed a product catalog website for Kuban Mebel in 2009, effectively expanding the company's reach to a regional level. This digital transformation enabled the company to extend its sales to several large cities in the region, including the capital, Krasnodar, significantly boosting its market presence and sales.