Java Backend Developer (Logistics Platform)

Freelance Remote (USA)

Order Management & Route Planning Backend — REST API backend for inter-state vehicle transportation logistics serving web customer portal and native mobile driver application. Platform consolidates transportation requests and optimizes routing for 10-12 company vehicles and ~100 partner carrier vehicles.

• Eliminated manual order processing bottleneck: Implemented automated order entry system with real-time route optimization and cost calculation. Reduced logistics coordinator involvement by ~80%
• Developed order-to-driver mobile workflow: Built mobile API enabling drivers to view assigned shipments, track navigation, capture proof-of-delivery, and communicate real-time status
• Designed multi-carrier rate engine: Implemented configurable pricing engine supporting negotiated rates, fuel surcharges, distance-based pricing, and volume discounts
• Impact: Saved organization ~180-200 person-hours monthly ($4,860-5,400 savings), enabled 5-10x order processing capacity with same team size

PeopleSoft Developer (Backend + Frontend)

St. Lawrence College | Kingston, Canada

Faculty Scheduling & Workload Automation System — comprehensive faculty workload planning and classroom scheduling system for 100+ faculty across 5-7 departments, 50+ classrooms, and 1000+ teaching hours per semester.

• Transformed 5-day manual process into 2-minute automation (95% reduction): automated scheduling system reading curriculum requirements, analyzing classroom availability, identifying conflicts, and generating optimized schedules. Reduced scheduling team from 4-5 staff to 1 coordinator
• Implemented intelligent conflict detection for 50+ classrooms preventing double-bookings and eliminating mid-semester disruptions
• Built MS SQL Server schema with complex PL/SQL queries for schedule validation and synchronization across PeopleSoft, Oracle SQR, and administrative databases
• Impact: 95% reduction in administrative processing time, eliminated dedicated scheduling staff, redirected resources to strategic academic planning

Java Backend Developer (Construction Tech)

Freelance Remote

Construction Project Estimation & Compensation Platform — backend systems for construction management platform serving 100+ independent contractors across multiple projects.

• Reduced payroll accounting workload by 60%+: Implemented automated compensation system calculating gross pay, tax withholdings, and deductions. Reduced processing time from 20-30 minutes to 2-3 minutes per contractor (90% reduction)
• Enabled transparent real-time compensation visibility: Built contractor-facing dashboard showing completed work, compensation breakdown, and payment history
• Developed intelligent material budgeting engine: Dynamic cost estimation system calculating material quantities, labor hours, and total project budget. Reduced estimation time from 2-3 hours to 15-20 minutes per project (75-80% improvement)
• Impact: 60%+ reduction in payroll processing time, eliminated compensation disputes, 75-80% faster project budgeting

Backend Developer (Enterprise Platform)

UKRPROMINVEST-AGRO | Ukraine

Developed 10+ backend systems and mobile applications for enterprise agricultural platform serving 3 organizations with 700+ field workers, 200+ vehicles, and 22,300 hectares operations.

Project 1: Mobile Field Data Management & NDVI Crop Analysis

• Built REST API backend enabling 700+ field workers to collect real-time operations data with offline capability and background synchronization
• Eliminated 2-3 day delays from manual paper-based transcription, saving 1,400 working hours daily
• Integrated drone-based NDVI imagery analysis automating crop stress detection and reducing decision-making lag from 1-2 weeks to hours
• Impact: Significant yield increase due to real-time response to crop condition changes

Project 2: GPS Fleet Management & Safety System

• Designed GPS-based fleet safety system for 200+ trucks with real-time geofencing and audio/haptic alerts preventing vehicles from veering off roads during low-visibility conditions (10-15m fog)
• Developed real-time operations tracking dashboard for truck locations, cargo status, and driver performance
• Impact: Achieved 100% incident prevention — zero fog-related accidents (previously 2-3 per season)

Project 3: Industrial Equipment Predictive Maintenance

• Implemented predictive maintenance for hundreds of equipment units (tractors, combines) with vibration sensors, maintenance schedules, and operating hours
• Prevented 1-2 day downtime during critical harvest season
• Impact: Successfully replicated to 2 additional sugar refineries

Technical Achievements:

• Multi-level ERP data synchronization, complex REST API integrations between legacy databases
• Relational database design supporting 10+ platforms with millions of records
• Advanced SQL optimization for real-time reporting

Software Developer (Back-end)

Autologistics LLC | Ukraine

• Designed and implemented robust data exchange pipelines between multiple databases
• Developed RESTful APIs to integrate external systems efficiently
• Built logging and monitoring systems to track and audit all data transfer operations
• Optimized data workflows for performance and reliability across distributed systems

Financial Manager

Wizard Group | Ukraine

• Managed four company branches
• Created accounting methodologies and implemented software solutions
• Prepared financial plans, purchase plans, and monthly budgets
• Oversaw budgeting processes and payroll
• Controlled cash flow, warehouse inventory, and vendor payments

1C Programmer

Qoders LLC | Ukraine

• Developed automation solutions using 1C for accounting and warehouse systems
• Integrated software with trading equipment
• Administered 1C server infrastructure

Project Manager (1C)

Favorite-S LLC | Ukraine

• Led 1C software development and implementation projects end-to-end
• Conducted pre-project assessments and wrote technical documentation
• Coordinated task setting, programming, testing, and go-live operations
• Trained client personnel and supported onboarding processes

1C Programmer

Favorite-S LLC | Ukraine

• Developed 1C-based accounting systems
• Localized software for compliance with national legislation