Greencastle Digital Tech Stack

Tech infrastructure and QA for betting and gaming platforms

Technology, Information and Media Belgrade 2–10 employees Founded 2024 Privately Held

Greencastle Digital is a 2–10 person engineering shop in Belgrade built around .NET, React, Oracle, and AWS. The stack reveals a heavy testing and QA layer (Selenium, Appium, TestNG, Cucumber, Playwright, JUnit) paired with infrastructure automation (Terraform, Ansible, AWS CDK) — typical of regulated gaming/betting environments where compliance and reliability carry outsized weight. Active migration from ASP.NET and Oracle toward Kafka and AWS signals movement away from legacy monoliths; the project list (microservices rollout, monolith decomposition, CI/CD automation, cloud transformation) confirms this is an internal-platform-heavy org still extracting themselves from legacy constraints.

Tech Stack 40 technologies

Core Stack.NET React Oracle Selenium JUnit Playwright Java C# Jenkins Azure DevOps GitLab CI/CD JavaScript AWS Postman Terraform Ansible CloudWatch Elasticsearch Prometheus Grafana Appium TestNG Cucumber HTML CSS SQL NUnit Sikuli REST Assured AWS CDK+8 more

AdoptingKafka AWS

ReplacingASP.NET

What Greencastle Digital Is Building

◆Challenges

Security compliance
Migrating legacy oracle to cloud
Monolith decomposition
Automating testing
Environment consistency
Compliance with licensing requirements
Cloud transformation
Self-service cloud adoption
Design system consistency
Design system scalability

▲Active Projects

Microservices and event-driven architecture rollout
React ui modernization
Betting and gaming platform infrastructure
Ci/cd pipeline automation
Monitoring and alerting solutions
Cloud platform automation
Ci/cd pipeline development
Self-service cloud adoption
Design system evolution
Scalable design system development

Hiring Activity

Decelerating9 roles · 2 in 30d

Department

Engineering

Design

Seniority

Senior

Lead

Mid

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About Greencastle Digital

Greencastle Digital operates as a dedicated technology hub serving challenger betting and gaming brands. The company spans engineering, design, and QA across a lean 2–10 person team based in Belgrade. Their core work centers on platform infrastructure: decomposing monolithic Oracle systems into microservices, modernizing React frontends, building out event-driven architecture with Kafka, and automating CI/CD pipelines. Current hiring is senior-skewed (6 of 9 open roles) and concentrated in engineering, suggesting they are rebuilding platform foundations rather than scaling product features.

HeadquartersBelgrade

Company Size2–10 employees

Founded2024

Hiring MarketsSerbia

Frequently Asked Questions

What tech stack does Greencastle Digital use?

Primary: .NET, React, Oracle, AWS. Testing: Selenium, Appium, Playwright, TestNG, Cucumber, JUnit. Infrastructure: Terraform, Ansible, AWS CDK, Jenkins, GitLab CI/CD. Monitoring: Elasticsearch, Prometheus, Grafana.

What is Greencastle Digital working on?

Microservices migration, monolith decomposition, React UI modernization, event-driven architecture (Kafka), CI/CD automation, cloud platform adoption, and design system evolution.