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Citrus Systems Tech Stack

iGaming marketing and platform ops for European and Latin American markets

IT Services and IT Consulting Belgrade, Serbia 51–200 employees Privately Held

Citrus Systems builds marketing, gaming, and financial products for iGaming operators across Europe, Africa, and Latin America. The hiring mix is heavily marketing-focused (11 of 27 open roles) with concurrent pressure to build QA from scratch and audit analytics implementations — suggesting a scaling operator dealing with data quality and operational stability as it expands into new geographies.

Tech Stack 24 technologies

Core StackKotlin Spring Java PostgreSQL Google Analytics Google Ads WordPress JavaScript Python Adobe Premiere Pro Excel Google Sheets Microsoft Office Vaadin Google Tag Manager Meta HTML Ahrefs Screaming Frog Google Search Console CSS Telegram TikTok Instagram

What Citrus Systems Is Building

◆Challenges

Protecting organic traffic
Lack of dedicated qa function
Platform stability
Customer service efficiency
Customer satisfaction metrics
Cleaning up analytics implementations
Ensuring data accuracy
Integrating analytics into reporting
Meeting cpa and cpl targets
Optimizing campaign performance

▲Active Projects

Build qa function from ground up
Small improvement experiments
Shift planning and resource allocation
Integration of games and statistics into bo
Implementing tools for supports in bo
Retargeting project
Analytics infrastructure & tracking audit
Ga and gtm rebuild across brands
Utm standards implementation
New user acquisition campaigns

Hiring Activity

Steady25 roles · 10 in 30d

Department

Marketing

11

HR

3

Ops

3

Engineering

2

Product

2

Support

2

Finance

1

Gaming

1

Seniority

Mid

14

Junior

5

Manager

4

Senior

3

Lead

1

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About Citrus Systems

Citrus Systems is a Belgrade-based IT services company serving the iGaming industry with products spanning marketing automation, gaming platforms, and financial workflows. The customer base spans European, African, and Latin American markets. The technical foundation is Java/Spring/Kotlin for backend services with PostgreSQL, WordPress for content, and Google Analytics/GTM for campaign tracking and attribution. Current operational focus includes shifting analytics infrastructure, establishing QA practices, and optimizing customer acquisition campaigns against cost-per-action and cost-per-lead targets.

HeadquartersBelgrade, Serbia

Company Size51–200 employees

Hiring MarketsSerbia, Peru, Hungary, Greece, Ukraine, Spain

Frequently Asked Questions

What tech stack does Citrus Systems use?

Primary stack: Java, Spring, Kotlin, PostgreSQL. Frontend: Vaadin, HTML, CSS, JavaScript. Analytics and marketing: Google Analytics, Google Tag Manager, Google Ads, Meta Ads. Content and design: WordPress, Adobe Premiere Pro.

What countries does Citrus Systems hire in?

Currently hiring in Serbia, Peru, Hungary, Greece, Ukraine, and Spain — aligning with their geographic footprint in European and Latin American iGaming markets.