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VOROBOV DENYS
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BACKEND DEVELOPER

Professional Summary

Backend .NET Developer with strong expertise in building distributed systems, REST
APIs, and event-driven architectures. Worked with high-load transaction processing,
HSM cryptography (3DS), XML signatures, Kafka, and complex SQL/PL-SQL logic. I
improve existing systems: reduce complexity, refactor legacy code, and design scalable
components aligned with DDD principles.

Hard skills

Backend & .NET: C#, ASP.NET Core (Web API, DI, Middleware), Microservices, DDD
Cloud & DevOps: Azure, Docker, CI/CD basics
Databases: PostgreSQL, Oracle, MySQL, PL/SQL, SQL Profiler
Event-driven: Apache Kafka, Service Bus, event workers
Security: 3DS digital signatures, Hardware Security Modules (HSM)
Tools: Git, NuGet, MSBuild, AutoMapper, Entity Framework Core
Other: Algorithms, System Design, OOP, Design Patterns

Soft skills

 Logical thinking and perseverance
 Public speaking and communication
 Fast learner and adaptive to new technologies
 English: Upper-intermediate+ level

Key Competencies

.NET development, Web development, ASP.NET, OOP principles, Design patterns,
Algorithms, Data structures, SQL and Database, System Design, Basic Front-end

PROFESSIONAL EXPERIENCE
Sep 2024 – now. Software-Engineer. InnRoad, Cloud-Based Hotel Management
Software.

 Designed and delivered new system features, improved code
maintainability and reduced complexity through refactoring.
 Participated in architecture and system design sessions, improved
modularity and reduced coupling between components.
 Led technical planning for user stories and features, including
specification writing, task breakdown, and estimation.
 Supported and modernized legacy code
 Identified and eliminated a critical legacy design flaw that propagated
system-wide, improving long-term code health.
 Delivered modular and extensible implementations that reduced code
complexity and enabled easier onboarding of new features.

May 2023 – Aug 2024. Software-Engineer. UPC, Card transaction processing company.

 Improved performance of high-load systems, optimizing response times
and reliability.
 Implemented XML encryption and signatures for 3DS to enhance
transaction security.
 Integrated Kubernetes probes for application health checks and monitoring.
 Integrated Apache Kafka for real-time data processing and messaging.
 Integrated Hardware Security Modules (HSM) for secure key management.
 Managed databases using JDBC and wrote efficient PL/SQL scripts.
 Performed debugging and refactoring to improve code quality and
maintainability.

EDUCATION

 MSCS - Yuriy Fedkovych Chernivtsi National University

2019 - 2024

 Technological practice in UKEESS Software House
Jun 2022 - Jul 2022| Java core, Spring Framework base