Данило

DANYLO KOLOMIIETS (Software Engineer)
City: Lviv
Phone: [open contact info](look above in the "contact info" section)
Email: [open contact info](look above in the "contact info" section)
LinkedIn: [open contact info](look above in the "contact info" section)

SUMMARY

• Proactive, highly motivated, and team-oriented .NET engineer with strong technical expertise.
• Experienced in Object-Oriented Programming (OOP), design patterns, SOLID principles, REST,
GraphQL, and Microservices
• Successfully delivered innovative and challenging features in software development projects
• Skilled in cloud computing, with extensive experience utilizing Microsoft Azure services and
technologies; earned AZ-900 certification
• Proficient in troubleshooting, conducting thorough code reviews, and performing comprehensive
unit testing to ensure software stability and efficiency
• Well-versed in Agile methodologies and best practices, fostering collaboration and continuous
improvement

WORK EXPERIENCE

Oct 2025 – Present — A long-running project that provides tools to manage the operations of dental clinics
across the EU. The application allows clinic employees to track and manage patient data, create treatment
plans, and enables patients to book new appointments and check in when they arrive at the clinic.

Responsibilities:
• Clarifying features, conducting grooming sessions, breaking features into small
Product Backlog Items (PBIs), and demoing completed functionality.
• Implementing PBIs and testing them in local and test environments.
• Fixing identified issues/bugs and releasing hotfixes.
• Creating and updating existing documentation.
• Improving system performance.

Technologies & Methodologies:
.NET, C#, REST, MS SQL, MongoDB, Entity Framework Core, MediatR, Redis, MassTransit,
Polly, xUnit,Azure, Azure Table Storage, Azure Blob Storage, Azure Service Bus, Azure SQL Database,
Azure Key Vault, Azure AppConfiguration, OOP, TDD, CQRS, Microservices, Clean architecture, Scrum.
 Tools:
Azure DevOps, Azure Portal, Visual Studio, Visual Studio Code, SQL Server Management
Studio, MongoDB Compass, Azure Storage Explorer, WSL, Lens, Draw.io.

Apr 2025 – Oct 2025 — A long-running project that provides the ability to estimate the cost of apartments,
buildings, or any other types of real estate. The application allows users to request an estimate for any
property, track the process, and send the results via SMS or email to property owners and banks.

Responsibilities:
• Conducted code analysis, collected results, identified vulnerabilities, and created Jira
tickets for tracking.
• Investigated vulnerabilities and researched the codebase to propose and implement
effective fixes.
• Resolved flaws in the application and provided detailed feedback on changes made.
• Documented test cases used to validate fixes and ensured comprehensive coverage.
• Tested fixes across various environments to ensure stability and compatibility.
• Collaborated with cross-functional teams to understand different application
components and address flaws effectively.

Technologies & Methodologies:
.NET, .NET Framework, ASP NET MVC, ASP NET Core Web API, C#,
VB, NUnit, MS SQL, Entity Framework Core, Dapper, RabbitMQ, Serilog, Elastic Search, REST, SOAP, Scrum.

Tools:
GitHub, TeamCity, Octopus Deploy, Elastic Search, VeraCode, Jira, Confluence, SSMS.

May 2021 – Feb 2025 — This is a greenfield project to design and build a contract and billing system
intended for initial internal use, with plans to later package it as a solution for customers. The software
addresses the need to track, manage, and send bills to end customers. It is a highly modular application
composed of several systems: a contracts system, a billing system, an audit system, and a reporting system.
Additionally, the application is being designed with support for multitenancy.
Responsibilities:
• Integrated the application into the client’s infrastructure by developing required
endpoints, resolving DevOps deployment issues, and building/maintaining CI/CD
pipelines, including NuGet package publishing.
 • Improved system architecture by applying Domain-Driven Design, enhancing domain
models, implementing microservices with synchronous and asynchronous
communication, and developing authentication/authorization for REST and GraphQL
services.
• Designed and developed core system components, including the billing engine, while
resolving system defects, infrastructure issues, and production data-related problems.
• Created and maintained unit and integration tests, simplifying GraphQL endpoint
testing and ensuring high-quality code delivery.
• Produced and updated project documentation, analyzed post-release issues,
monitored system performance, and facilitated integration with client systems
through code reviews and knowledge-transfer sessions.
• Actively supported the team by conducting peer code reviews, onboarding new
members, delivering story demos, and contributing to retrospectives and technical
decision-making.

Technologies & Methodologies:
.NET, C#, GraphQL, REST, MS SQL, Entity Framework Core, Dapper, MediatR, Redis, gRPC,
Polly, xUnit, Azure AppInsights, Azure Table Storage, Azure Functions, Azure Service Bus, Azure SQL
Database, Azure Key Vault, Azure AppConfiguration, OOP, DDD, TDD, Scrum, Azure, Microservices,
Onion architecture.

Tools:
Azure DevOps, Azure Portal, Visual Studio, Visual Studio Code, GraphQL Playground, SQL
Server Management Studio, Lens, Grafana, Draw.io.

EDUCATION

2021 – 2023 Master of Science in Computer Science, Lviv State University of Life Safety
2019 – 2021 Bachelor of Science in Computer Science, Lviv State University of Life Safety

ADDITIONAL INFORMATION

Languages: Ukrainian (Native), English (Upper-Intermediate).