Rostyslav

ROSTYSLAV SUPYK
.Net Software Engineer

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Lviv, Ukraine

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SKILLS EDUCATION HISTORY
Backend: C#, LINQ, .Net(Core/Framework), Ivan Franko National University of Lviv 2021

ASP.NET Core(Web API, MVC) Faculty of Applied Mathematics and Informatics

Major field “System Analysis” Master's degree
Data: SQL Server, PostgreSQL, Cosmos DB,

Entity Framework Core, NHibernate Ivan Franko National University of Lviv 2020

Cloud (Azure): App Service, Functions, Faculty of Applied Mathematics and Informatics

Key Vault, Blob Storage, Service Bus, Major field “System Analysis” Bachelor's degree

Application Insights, Monitor EPAM .NET Lab 2018

DevOps: Git, Docker, Azure DevOps, Terraform Training Program
Messaging & Jobs: RabbitMQ, Hangfire

Architecture: SOLID, Design Patterns, REST API,

Microservices, Event-Driven Architecture
SUMMARY OF QUALIFICATIONS
Frontend: Blazor, HTML, CSS, JavaScript
.NET Software Engineer with 5+ years of professional
Testing: NUnit, xUnit, MSTest, NSubstitute
experience and a Master's degree in Applied Mathematics,
Practices: Agile, Scrum, Kanban specializing in building scalable backend systems with
.NET, C#, and Azure cloud services. I've delivered
LANGUAGES enterprise-grade solutions across energy, retail, security,
and automotive domains for companies including EPAM
English - upper intermediate
Systems, Binariks, InterLogic, GlobalLogic, and PowerTeams
Ukrainian - native — covering cloud-based backend systems, REST APIs,
database integration and performance optimization. My
HOBBIES AND INTERESTS background in applied mathematics gives me a
structured, analytical approach to solving complex
Football
technical problems and designing maintainable and
Swimming scalable software solutions. I'm looking for a role where I
Snowboarding/Skiing can continue growing as a .NET Engineer while contributing
Crypto/Trading to reliable, high-performance software systems.
 WORK EXPERIENCE

PowerTeams — Software Engineer (May,2025 – Present)
Client - Safox: Enterprise ERP platform for a security organization — patrol scheduling, incident management,
personnel & payroll, facility assignments · Team: 5 devs, 3 QA, 1 PM
Designed and built an end-to-end "Sign of Life" safety monitoring feature for security guards — including
the database schema for configuration and check-in logs, the API layer, and frontend configuration UI —
with real-time status calculation based on configurable time thresholds, giving dispatchers live visibility
into guard safety
Built internal API endpoints, backend services, and background jobs to support evolving ERP workflows
(scheduling, incidents, personnel), paired with corresponding UI forms, data tables, scripts, and tests
Refactored and rewrote legacy modules to improve maintainability, alongside ongoing bug fixing and
technical investigation
Technologies: .Net, .Net Core, C#, LINQ, ASP.NET Core MVC, Redis, SQL Server, LLBLGen Pro, Autofac, JavaScript.

GlobalLogic — Software Engineer (Feb,2024 – Dec,2024)

Client - DRB Systems: Cloud-based automation platform for car wash operations — payment processing,
gate control, wash program selection, and additional service options · Team: 6 devs, 4 QA, 1 PO

Contributed to backend development across .NET Core microservices hosted on Azure, extending API
endpoints, refactoring service-layer components, and writing integration tests to validate end-to-end
workflows
Performed database migrations, schema changes, and SQL script optimization to support evolving
business requirements
Conducted technical investigations, fixed bugs across backend services, and participated in code
reviews, collaborating with QA to ensure stable releases

Technologies: .NET Core, C#, LINQ, ASP.NET Core, Azure App Service, Azure Functions, Azure Key Vault, Azure
Application Insights, Azure DevOps, Azure SQL Database, PostgreSQL, xUnit, NSubstitute

InterLogic — Software Engineer (Jan,2022 – Jul,2023)

Client - Lobyco: White-label solution that enables retailers to build a digital ecosystem that increases
consumer loyalty and drives traffic to stores — Prime subscriptions, partner benefits (TV, streaming, fuel, retail
discounts) and third-party integrations · Team: 7 devs, 2 QA, 1 UX/UI, 1 PO, 1 DevOps (shared)

Investigated intermittent production incidents following horizontal scaling (second App Service instance),
identified an in-process lock mechanism causing race conditions across instances, and proposed a
distributed locking solution via Azure Blob Storage or Cosmos DB as a temporary solution
Implemented a bank integration via an Azure Function triggered by incoming Blob Storage files,
automatically forwarding processed data to a bank's external API to support partner benefits workflows
Led the backend implementation of the Prime → Prime 2 subscription migration, maintaining backward
compatibility while supporting updated pricing tiers, benefit structures, and business logic changes
Configured and maintained Azure resources — App Service, Functions, Key Vault, Blob Storage, Cosmos
DB, Application Insights, Azure Monitor, and Alerts — with basic infrastructure changes via Terraform
Developed backend features and services, wrote unit and integration tests, participated in code reviews,
conducted off-peak deployments with post-release health checks, and resolved production incidents via
targeted SQL scripts

Technologies: .NET Core, C#, LINQ, ASP.NET Core, NHibernate, NSubstitute, NUnit, Azure App Service, Azure
Functions, Cosmos DB, Blob Storage, Service Bus, Azure Key Vault, Azure Monitor, Azure DevOps, Terraform
 Binariks — Software Engineer (Apr,2021 – Oct,2021)

Client - Integrated Biometrics: Early-stage platform for processing and transmitting FBI-certified fingerprint
scanner data · Team: 2 devs, 1 QA, 1 PM

Contributed to early-stage platform development for fingerprint data processing, implementing CRUD
functionality across database schema, API endpoints, background jobs, and frontend UI components
Wrote unit tests, performed bug fixing, and conducted technical investigations to support platform
stability during active development
Collaborated directly with the client and team to clarify requirements and ensure alignment during the
pre-production phase

Technologies: .NET Core, C#, ASP.NET Core, Blazor, Hangfire, Docker, MySQL, Entity Framework Core, NUnit, LINQ

EPAM Systems — Software Engineer (Jul,2020 – Mar,2021)

Client - Thomson Reuters (Business Information and Media): Desktop migration utility for processing and
transmitting financial data files to a server-side system · Team: 5 devs, 2 QA, 1 BA, 1 PM

Developed file processing logic for the desktop migration utility — parsing and extracting relevant
financial data from input files and publishing processed records to a RabbitMQ message queue for
downstream server-side consumption
Contributed to the Windows Forms UI layer (loading indicators, data tables, and input forms) and made
targeted fixes to the installer component
Extended and refactored ASP.NET Web API endpoints in a separate ASP.NET Web API service to align with
updated business logic requirements
Wrote unit tests, investigated and resolved bugs, and communicated directly with the client and team to
clarify requirements

Tech: .NET, .NET Core, C#, ASP.NET Web API, Windows Forms, RabbitMQ, NUnit, Unity Container, Log4net, LINQ

EPAM Systems — Junior Software Engineer (Jan,2019 – May,2020)

Client - Schlumberger, EV – Energy: Cloud-based drilling planning platform (Tai-ji) — trajectory visualization
and planning for oil & gas drilling operations · Team: 6 devs, 1 QA, 1 PM

Contributed to backend development of drilling trajectory calculations, working with mathematical
algorithms (including interpolation methods) to model and process directional drilling data
Built API endpoints that generated and returned PDF, PowerPoint, and Excel reports containing trajectory
data and drilling parameters, using the Spire.Office for .NET library
Performed bug fixing, refactoring, and technical investigations, primarily within the mathematical
computation layer, and wrote unit tests to validate algorithm correctness

Technologies: .Net, C#, ASP.NET Web API, NUnit, Unity Container, NLog, LINQ, Spire.Office for .NET