15+
Years Java Development
3+
Years Rust Development
500K+
Daily Transactions
200+
Students Trained
What I'm Looking For
- Position: Senior Backend Developer, Tech Lead, or Staff Engineer
- Work Type: Full-time or Contract (Remote preferred, open to hybrid)
- Specialization: Rust, Java, Microservices Architecture, Cloud Infrastructure, System Design
- Location: Remote from Ukraine (GMT+2) • Open to relocation for exceptional opportunities
- Availability: Can start within 2 weeks notice period
- Preferred Industries: FinTech, SaaS Platforms, Cloud Infrastructure, Enterprise Software, Real-Time Systems, EdTech
- Team Size: Comfortable with early-stage startups to large enterprises • Experience leading teams of 3-5 developers
- Salary Expectations: Competitive rates based on market standards and project complexity
About Me
I'm a Senior Backend Developer with 15+ years of Java experience and over 3 years of hands-on Rust development. I build high-performance, scalable backend systems that process hundreds of thousands of daily transactions — all while maintaining 99.9% uptime.
At gtfs.pro, I lead backend development and architecture for public transit APIs, handling 10K+ daily requests with 35% lower latency after migrating to an async Rust stack. Previously at Teamwork Commerce (Uniqlo retail platform), I engineered distributed systems processing 500K+ daily transactions across multiple regions.
My work blends technical depth with business impact. I specialize in microservice architecture, event-driven systems, and cloud-native solutions. I focus on measurable improvements — from reducing API response times to optimizing data pipelines and ensuring production reliability at scale.
Beyond engineering, I’m passionate about mentorship and knowledge sharing. I’ve trained 200+ students with a 75% employment success rate and guided 10+ engineers to senior roles. I believe great software comes from strong teams — and I love helping others reach their full potential.
Why hire me? I bring proven production experience, a track record of performance optimization, and the ability to elevate engineering culture through mentorship and best practices. I’m seeking opportunities where I can contribute to both technical excellence and team growth.
Technical Skills
Rust Programming
3+ years
Actix Web
Axum
Tokio
Serde
Diesel ORM
Rayon
reqwest
thiserror
async/await
Java Ecosystem
15+ years
Spring Boot
Spring Cloud
Spring Data JPA
Spring Security
Hibernate ORM
MyBatis
Maven
Gradle
Databases & Storage
PostgreSQL
Oracle Database
MySQL
Redis
ClickHouse
ElasticSearch
SQL Optimization
Cloud & DevOps
Amazon AWS
Google Cloud Platform
Docker
Jenkins CI/CD
Git Version Control
Linux Administration
Messaging & APIs
Apache Kafka
RabbitMQ
gRPC
REST API Design
WebSocket
GraphQL
Professional Experience
Rust Developer
gtfs.pro
Technology Stack: Rust, Actix Web, Tokio, Java 21, Spring Boot 3,
PostgreSQL, gRPC, Docker
- Architected and deployed microservices infrastructure handling 10,000+ daily API calls for real-time public transit data processing
- Reduced API response latency by 35% through implementation of async Rust architecture with Tokio runtime
- Integrated high-concurrency async processing patterns using Tokio for handling thousands of concurrent connections
- Built RESTful APIs serving transit schedules, real-time updates, and route optimization data to mobile and web clients
- Implemented data aggregation pipelines processing GTFS (General Transit Feed Specification) data from multiple transit agencies
Senior Java Developer
Teamwork Commerce (Uniqlo Retail Platform)
Technology Stack: Java 23, Spring Boot, Hibernate, Docker,
PostgreSQL, Redis, AWS, Google Cloud Platform
- Designed and built enterprise backend systems processing 500,000+ daily transactions for global retail operations
- Improved data synchronization performance by 25% through optimization of batch processing and caching strategies
- Implemented hybrid AWS/GCP cloud infrastructure ensuring high availability and disaster recovery
- Developed microservices architecture for retail inventory management, order processing, and POS integration
- Led team of 3 junior developers, conducting code reviews and establishing best practices for Spring Boot development
- Achieved 99.9% uptime through implementation of circuit breakers, retry policies, and comprehensive monitoring
Senior Backend Java Developer
Almexoft
Technology Stack: Java 11, Spring Boot, Apache Kafka, ClickHouse,
ElasticSearch, Apache Tomcat 10
- Developed real-time analytics platform serving 100,000+ active users with sub-second query response times
- Reduced data processing time by 15% through query optimization and introduction of columnar database (ClickHouse)
- Maintained 99.9% system uptime across distributed microservices architecture
- Implemented event-driven architecture using Apache Kafka for streaming analytics and real-time data processing
- Built full-text search capabilities using ElasticSearch for log analysis and business intelligence dashboards
- Mentored 5 junior developers in Spring Boot best practices and microservices design patterns
Java Developer
Massmo Group (Tele2 Telecommunications)
Technology Stack: Java 7, Spring Framework, Hibernate, Oracle
Database, Apache Tomcat 7
- Developed telecom billing systems and CRM platforms for major telecommunications provider
- Worked with Oracle databases managing millions of customer records and transaction data
- Implemented complex business logic for subscription management, billing cycles, and payment processing
- Optimized database queries reducing report generation time by 40%
Junior Java Developer
IDC (idknet.com)
Technology Stack: Java 6, Spring Framework, Hibernate, Oracle
Database, Apache Tomcat 6
- Started professional Java development career building web applications and backend services
- Developed internal tools and customer-facing portals using Spring MVC framework
- Gained foundational experience in enterprise Java development, database design, and web services
Education & Qualifications
Master of Telecommunications
Odesa National Academy of Telecommunications
Advanced degree focusing on telecommunications systems, network architecture, and software engineering principles.
Bachelor of Information Systems
Odesa National Academy of Telecommunications
Foundation in computer science, software development, and information system design.
Key Achievements & Impact
- gtfs.pro Platform Architecture: Designed and implemented core microservices infrastructure enabling 10,000+ daily users to access real-time public transit data across multiple cities
- Uniqlo Enterprise Backend: Built scalable system handling 500,000+ daily transactions for global retail operations with 99.9% uptime SLA
- Technical Mentorship Program: Trained 200+ students in Java and Rust development, achieving 75% employment rate with many students now working at top tech companies
- Performance Optimization Leadership: Reduced API latency by 35% and data processing time by 15-25% across multiple production systems
- System Reliability Excellence: Maintained 99.9% uptime across all enterprise systems through implementation of robust monitoring, alerting, and incident response procedures
- Team Development: Led and mentored teams of 3-5 developers, helping 10+ engineers advance to senior positions through structured mentorship and code review practices
- Cloud Migration Success: Successfully implemented hybrid AWS/GCP infrastructure reducing operational costs by 20% while improving system reliability
Core Competencies & Expertise
Microservices Architecture
Event-Driven Design
Domain-Driven Design (DDD)
High-Performance APIs
Real-Time Data Processing
Cloud Infrastructure Design
System Scalability
Backend Performance Optimization
Technical Leadership
Developer Mentorship
Database Architecture
Async Programming
Distributed Systems
API Design
Code Review
Agile Development
Professional Interests & Passion
Backend Architecture
System Design
Teaching & Training
Developer Mentoring
Open Source Contribution
Tech Innovation
Performance Optimization
Cloud Native Development
Rust Ecosystem
Developer Tools
Languages
Ukrainian
Native SpeakerRussian
Native SpeakerEnglish
Professional (B2+)Get In Touch - Let's Build Something Great
Ready to discuss your project or opportunity? I'm available for full-time positions, contract work, and consulting engagements. Whether you need a senior backend developer to scale your infrastructure, a tech lead to guide your team, or a Rust specialist to build high-performance systems, I'm here to help.
What I can help with: Backend architecture design, microservices migration, performance optimization, team mentorship, code review processes, technical strategy, and building scalable systems from scratch or improving existing ones.
Odesa, Ukraine (GMT+2 timezone)
Why Companies Choose to Work With Me
Technical Excellence
- 15+ years of production experience building systems at scale
- Deep expertise in both Rust and Java ecosystems
- Proven track record of performance optimization and system reliability
- Strong understanding of microservices, cloud architecture, and distributed systems
Business Impact
- Built systems handling 500K+ daily transactions with 99.9% uptime
- Reduced costs and improved performance through strategic optimizations
- Fast learner who quickly adapts to new technologies and business domains
- Strong communication skills for working with cross-functional teams
Leadership & Mentorship
- Trained 200+ developers with 75% employment success rate
- Experience leading technical teams and establishing best practices
- Passionate about code quality, testing, and maintainability
- Active contributor to developer community and knowledge sharing
Reliable Partnership
- Remote work experience with distributed international teams
- Self-motivated and proactive problem solver
- Available to start within 2 weeks notice period
- Flexible with time zones and communication preferences