Oleh
From Ukraine (UTC+3)
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projects done365
hours worked1
offers now 🔥Oleh – Django, React, Typescript
Senior Full-Stack Developer & Team Lead with 10 years of experience in Python/Django, React, TypeScript, PostgreSQL, and AWS. Oleh boasts strong background building and scaling multi-tenant SaaS platforms, real-time systems, and enterprise solutions across fintech, education, logistics, CMS and cloud infrastructure. He led the development of a global backup & disaster recovery platform for 20,000+ businesses and a logistics platform with live tracking and route optimization.
11 years of commercial experience in
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Let’s get started today!Experience Highlights
Full-Stack developer, Team lead
Cloud-based platform for a managed Backup-as-a-Service (BaaS) and Disaster-Recovery-as-a-Service (DRaaS) provider serving enterprise clients across multiple compliance frameworks (SOC 2, ISO 27001, PCI-DSS, HIPAA). The platform enables customers to manage backup policies, monitor backup jobs in real-time, perform data restores, configure disaster recovery orchestration, and manage subscriptions across multiple product lines (Veeam-powered BaaS/DRaaS, endpoint backup, SaaS backup, and server backup). Has a multi-tenant architecture supporting 20,000+ businesses globally with geo-redundant data centers across North America, Europe and Oceania.
- Designed and developed REST APIs endpoints for fleet management, route planning, order dispatch, driver assignment, vehicle tracking, and customer portal functionality.
- Built responsive web dashboard for dispatchers featuring real-time map view with live vehicle positions, route visualizations, traffic overlays, and delivery status indicators updated via WebSockets.
- Implemented intelligent route optimization engine using Google OR-Tools and custom algorithms to calculate optimal multi-stop routes considering vehicle capacity, time windows, traffic patterns, driver hours, and delivery priorities.
- Developed real-time vehicle tracking system integrating with GPS telematics devices (Geotab, Samsara, Verizon Connect) to capture location data, speed, fuel consumption, idle time, and vehicle diagnostics.
- Created interactive map interfaces using Mapbox GL JS and Leaflet for route planning, geofencing, territory management, and visualizing historical route data with playback capabilities.
- Implemented automated route recalculation and dynamic routing to handle real-time changes including new urgent orders, traffic delays, vehicle breakdowns, and driver availability changes.
- Created order management system with features for shipment creation, customer address validation, delivery time window scheduling, multi-stop consolidation, and load planning optimization.
- Implemented geofencing functionality for automated arrival/departure detection at customer locations, depot check-in/check-out, and restricted zone alerts, triggering notifications to dispatch and drivers.
- Developed analytics dashboards providing insights on fleet utilization, on-time delivery rates, fuel consumption trends, driver performance metrics, route efficiency, and cost per mile calculations.
- Created a dispatch console for operators to manage daily operations, including order assignment, driver scheduling, vehicle allocation, route approval, exception handling, and real-time communication with drivers.
- Implemented predictive ETA calculations using machine learning models analyzing historical route data, traffic patterns, time of day, weather conditions, and driver behavior to provide accurate delivery time estimates.
- Built a maintenance management system with scheduled maintenance tracking and automated service
Full-Stack developer
Comprehensive fleet management and logistics CRM platform enabling transportation companies to manage their entire fleet operations, optimize delivery routes, track vehicles in real-time, and streamline dispatch operations. The system serves logistics companies managing 50-500+ vehicles, providing end-to-end visibility from order intake through delivery completion. Built with geospatial capabilities for route optimization, real-time GPS tracking, driver management, fuel consumption monitoring, maintenance scheduling, and automated customer notifications. The platform integrates with telematics devices, supports multi-depot operations, and provides predictive analytics for delivery time estimates, route efficiency, and operational cost optimization.
- Designed and developed REST APIs endpoints for fleet management, route planning, order dispatch, driver assignment, vehicle tracking, and customer portal functionality.
- Built responsive web dashboard for dispatchers featuring real-time map view with live vehicle positions, route visualizations, traffic overlays, and delivery status indicators updated via WebSockets.
- Implemented intelligent route optimization engine using Google OR-Tools and custom algorithms to calculate optimal multi-stop routes considering vehicle capacity, time windows, traffic patterns, driver hours, and delivery priorities.
- Developed real-time vehicle tracking system integrating with GPS telematics devices (Geotab, Samsara, Verizon Connect) to capture location data, speed, fuel consumption, idle time, and vehicle diagnostics.
- Integrated OpenAI API to generate natural-language delivery exception reports, surfacing route anomalies and delay patterns for dispatchers without requiring manual log review.
- Built an AI-assisted dispatch suggestion engine using LangChain that recommended optimal vehicle-driver assignments based on historical performance, load type, and real-time conditions.
- Created interactive map interfaces using Mapbox GL JS and Leaflet for route planning, geofencing, territory management, and visualizing historical route data with playback capabilities.
- Implemented automated route recalculation and dynamic routing to handle real-time changes including new urgent orders, traffic delays, vehicle breakdowns, and driver availability changes.
- Created order management system with features for shipment creation, customer address validation, delivery time window scheduling, multi-stop consolidation, and load planning optimization.
- Implemented geofencing functionality for automated arrival/departure detection at customer locations, depot check-in/check-out, and restricted zone alerts triggering notifications to dispatch and drivers.
- Developed analytics dashboards providing insights on fleet utilization, on-time delivery rates, fuel consumption trends, driver performance metrics, route efficiency, and cost per mile calculations.
- Created dispatch console for operators to manage daily operations including order assignment, driver scheduling, vehicle allocation, route approval, exception handling, and real-time communication with drivers.
- Implemented predictive ETA calculations using machine learning models analyzing historical route data, traffic patterns, time of day, weather conditions, and driver behavior to provide accurate delivery time estimates.
- Built maintenance management system with scheduled maintenance tracking and automated service.
Full-Stack developer, Team Lead
Software agency, specializing in building high-quality mobile and web applications using modern JavaScript technologies. Experience ranges from consumer apps and IoT-connected products to fintech and Web3 platforms, enabling us to support both startups and established companies in launching and scaling their products.
- Managed relationships with clients, specifically with English-speaking customers, understanding their needs and delivering tailored software solutions.
- Mentored a team of developers of 10 people fostering a collaborative and productive work environment.
- Oversaw the planning, execution, and delivery of software development projects, ensuring they met quality standards and deadlines.
- Actively participated in the development process, contributing to both front-end and back-end solutions.
- Implemented best practices and standards to ensure the delivery of high-quality software products.
- Participated in effective staff supporting and supporting clients’ end-users, enhancing satisfaction and loyalty.
Full-Stack Developer
Web development agency specializing in building custom websites and digital platforms using Python, Django, JavaScript, HTML/CSS, and responsive front-end frameworks. The company focuses on creating business-oriented web solutions with integrated CMS, SEO, and ongoing server hosting/administration support. BergSoft+ works across niches such as e-commerce, corporate websites, service portals, and marketing-driven web tools, prioritizing performance, usability, and long-term maintainability.
- Built server-side logic and database interactions to support application functionality.
- Implemented user interfaces with HTML, CSS, and JavaScript, ensuring responsive and user-friendly designs.
- Created and maintained RESTful APIs for seamless communication between front-end and back-end systems.
- Wrote unit and integration tests, and performed debugging to ensure software quality and reliability.
- Managing deployment processes using CI/CD pipelines and tools like Jenkins, Docker, Ansible.