Олександр

Oleksandr Holoveichuk
Software Engineer | C# / .NET | React & TypeScript
Kyiv, Ukraine | On-site, hybrid or remote
[open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)

Profile
Software engineer with around three years of commercial experience building .NET SaaS products and API
integrations. Progressed from CRM feature development to responsibility for delivery, deployments and production
support, and recently took a React, TypeScript and NestJS product to production.

Skills
Backend and data: C#, .NET 6-10, ASP.NET Core, EF Core, MediatR/CQRS, NestJS, REST APIs, OAuth 2.0/OIDC, JWT,
PostgreSQL, MySQL, MongoDB.
Frontend: Blazor, React, TypeScript, JavaScript.
Delivery, monitoring and testing: Docker, Kubernetes, Terraform, CI/CD, GitHub Actions, Azure DevOps, Azure (AD
B2C, Key Vault, Blob Storage), OpenTelemetry, Grafana, TUnit, Jest, Testcontainers.

Experience
Software Engineer | SAM.Coach / GTM8.ai
March 2024 - Present | Remote, Australia-based company
Deliver sales-coaching SaaS features end to end (backend, frontend, integrations, deployments and production
support), working with the product team and an external architect.
Built subscription billing for SAM.Coach with Stripe, including trials, add-ons and usage tracking; developed two-
way HubSpot CRM sync and Google, Microsoft Graph and Zoom calendar integrations.
Improved application security through role-based access controls, customer data isolation and secure credential
management.
Reduced frontend download size by 40%; cut AI processing time by 31% on a benchmark recording.
Migrated application deployments to Kubernetes and automated infrastructure provisioning; implemented
production monitoring, alerts and release rollback tools.
Built the automated unit-test suite from scratch using TUnit, adding approximately 2,800 tests and CI quality
checks.
Project: SAM Recruit (AI candidate assessment), August 2026 - Present
Built with NestJS, React/TypeScript and PostgreSQL, from first commit to initial production deployment in four
weeks.
Implemented candidate scoring, reporting and CV-rewriting workflows in which code, not the AI model, checks
generated claims against the cited text in uploaded documents; backed by automated integration tests.
.NET Full-Stack Developer | SAM.Coach / GTM8.ai
July 2023 - November 2023 | Remote, Australia-based company
Built CRM functionality for deals, contacts, companies and configurable sales stages using ASP.NET Core, Blazor
and EF Core.
Implemented CSV/XLSX import and export with duplicate detection and integration tests; developed notes, tasks,
attachments and activity history.

Education and languages
State University of Trade and Economics, Kyiv
MSc Computer Science, 2023-2024 | BSc Computer Science, 2019-2023
English: B2 (upper-intermediate).