Freelancer profile translated to English.

Description

I am a Fullstack Software Developer with a focus on SaaS solutions and multi-tenant architectures. In recent years, I have automated complex business processes - from DATEV integrations to e-commerce ERP systems with over 1,000 users.

My expertise lies in Python (Django), PHP (Laravel), and Vue.js, complemented by DevOps experience with Docker and CI/CD via Azure DevOps. I place great importance on clean code, sustainable architecture (DDD/CQRS), and performance. I am currently deepening my knowledge in AWS and cloud infrastructure to make my solutions even more scalable.

Industry field of expertise

Languages

German
Native or bilingual
English
Fluent
Ukrainian
Native or bilingual

Workplace preferences

Remote only

Primarily works remotely

Flowtact
Senior Fullstack Developer
BANKING AND INSURANCE
March 2024 - Today (2 years and 3 months)
Cologne, Germany
SaaS platform for tax firms that combines accounting and document processes in one system. Focus is on automating firm processes and securely integrating financial systems like DATEV.
• CI/CD & Containerization: Built a Docker stack (approx. 20 services) and implemented automated deployments via Azure DevOps, reducing release time by over 80%, eliminating manual interventions.
• Performance Optimization: Developed optimized SQL reporting for several 100,000 records. Reduced report generation from 90 seconds to 300 ms.
• DATEV Integration: Implemented a robust REST import with asynchronous processing and error management for financial accounting data.
• Monitoring & Alerting: Set up central monitoring with Prometheus / Grafana and custom exporters; automatic Teams notifications for service disruptions.
• Security & Authentication: Integrated OAuth 2.0 / OpenID Connect for secure connection to the DATEV platform, including token management and access control. Stack: Python, Django, Celery, Redis, Prometheus, Grafana, Unittest, Docker, PostgreSQL, REST API, CI/CD, Linux, Typescript, Vue, TailwindCSS, Bash, Azure.
Python Django VueJS Docker Azure DevOps
RoriCRM
Fullstack Software Developer
E-COMMERCE
April 2022 - March 2024 (1 year and 11 months)
Kyiv, Ukraine, 02000
Cloud-based CRM/ERP system for financial and inventory management with over 1,000 users, developed for small and medium-sized e-commerce businesses.
• Architecture & System Design: Designed and implemented a complete multi-tenant platform from scratch (database design, backend architecture, role and permission management).
• Backend & Integrations: Developed scalable REST APIs with Laravel / Livewire for connecting external systems (e.g., OpenCart, delivery services, marketplaces) - automatic order import with near-realtime synchronization.
• Business Processes: Developed a module for creating express delivery notes via one-click and for detailed analysis and reporting functions for sales and inventory data. Stack: PHP, Laravel, Livewire, Git, REST, Javascript, MariaDB, NGINX, MVC, Bootstrap.
Laravel PHP PostgreSQL Wordpress JavaScript
Danni
Junior Web Developer
RETAIL (LARGE RETAILERS)
January 2020 - May 2022 (2 years and 4 months)
Kiev City, KV, Ukraine
Online shop for toys with around 3,000 daily users.
• Integration of custom OpenCart modules (PHP) and connection of external systems (CRM, payment and shipping services, analysis tools) for process automation.
• SEO & Performance: Technical optimization of the shop, reduced loading times, improved user experience, and higher conversion rates through targeted Google Ads tracking. Stack: PHP, Opencart, GitHub, MySQL, JS, HTML, CSS.
PHP MySQL HTML CSS JavaScript

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Learning A-Z - Deep dive into AI methods, data analysis, and Python-based models
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Learning A-Z - Vertiefung in KI-Methoden, Datenanalyse und Python-basierte Modelle
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& Vue.js Advanced Course - Modernes Fullstack-Development mit Fokus auf Clean Code und Komponentenarchitektur

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Senior Fullstack Developer

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