12/12/2025 updated
100 % available
Senior Software Engineer - Full-Stack Desktop Apps Automation & Integrations
Ozdiv, Ukraine
Only remote
Bachelor's Degree in Computer ScienceAbout me
I’m a Senior Software Engineer with 7+ years of experience turning complex business workflows into clean, intuitive, and scalable software solutions. My work spans full-stack development, desktop engineering (WPF & PyQt), and advanced automation/integration systems.
JavaScript.NET FrameworkApplication Programming Interfaces (APIs)Artificial IntelligenceAmazon Web ServicesAmazon Elastic Compute CloudAmazon S3Software ApplicationsAuthenticationsAutomationTelecommunicationsCustomer Relationship ManagementC Sharp (Programming Language)Software as a ServiceCloud Computing
Full-Stack Web Development
Expertise in React, Next.js, TypeScript, JavaScript, Tailwind, Material UI for frontend and FastAPI, Django, Node.js, Express, REST APIs, WebSockets for backend development
Desktop Application Development
Proficiency in WPF/.NET (C#), PyQt5, and hardware integrations including cameras, scanners, and serial devices
Cloud and DevOps Technologies
Experience with AWS (EC2, S3, Lambda), Docker, CI/CD, and GitHub Actions for deployment and infrastructure management
Automation and Workflow Orchestration
Skills in n8n, ETL pipelines, CRM integrations, and workflow orchestration systems
Database Management
Knowledge of PostgreSQL, MongoDB, MySQL, SQLite, and Supabase for data storage and management
Artificial Intelligence and Image Processing
Experience with OpenCV, Pillow for image processing, licensing systems, authentication and authorization
SaaS Platform Development
Development of licensing engines, hardware-integrated desktop tools, data ingestion pipelines, and cloud-native applications
API Development and Integration
Building and integrating APIs for desktop applications, implementing OAuth flows, and API communication systems
Expertise in React, Next.js, TypeScript, JavaScript, Tailwind, Material UI for frontend and FastAPI, Django, Node.js, Express, REST APIs, WebSockets for backend development
Desktop Application Development
Proficiency in WPF/.NET (C#), PyQt5, and hardware integrations including cameras, scanners, and serial devices
Cloud and DevOps Technologies
Experience with AWS (EC2, S3, Lambda), Docker, CI/CD, and GitHub Actions for deployment and infrastructure management
Automation and Workflow Orchestration
Skills in n8n, ETL pipelines, CRM integrations, and workflow orchestration systems
Database Management
Knowledge of PostgreSQL, MongoDB, MySQL, SQLite, and Supabase for data storage and management
Artificial Intelligence and Image Processing
Experience with OpenCV, Pillow for image processing, licensing systems, authentication and authorization
SaaS Platform Development
Development of licensing engines, hardware-integrated desktop tools, data ingestion pipelines, and cloud-native applications
API Development and Integration
Building and integrating APIs for desktop applications, implementing OAuth flows, and API communication systems
Experience
Professional experience0 - 5 years
Freelancer since2024
Languages
EnglishFluentUkrainianNative speaker
Project history
Architected and developed TheGrail.app, a full SaaS platform for licensing, subscriptions, secure file downloads, and user onboarding. Built scalable backend using FastAPI + MongoDB, implementing user auth, license generation, OAuth flows, and API communication with desktop app. Delivered polished SaaS frontend with React + Tailwind, including onboarding flows, dashboards, payment pages, and responsive UI.
Developed full-stack cloud applications using React, TypeScript, FastAPI, MongoDB, PostgreSQL, AWS. Built complex automation workflows using n8n, integrating CRMs, Excel pipelines, Google Drive, and internal APIs. Delivered WPF/.NET and PyQt desktop tools with hardware integrations and internal database sync. Led architecture discussions, performed code reviews, and collaborated across UX, QA, and management teams.