Senior Full Stack Engineer (AdTech)

Location: Kaunas, Lithuania; hybrid schedule with two days in the office each week

Salary: €50,000–52,500 per year, plus equity and an annual performance bonus in accordance with local law and company policy.

Company

hirify.global is a restaurant technology and booking platform serving millions of diners and more than 70,000 restaurant partners as part of Booking Holdings.

What you will do

• Build consent-aware tracking across web booking journeys, preserving campaign identifiers and conversion data through reservation confirmation.
• Extend conversion event services to process booking events and deliver partner-specific conversion and revenue signals.
• Build and improve integrations with external partners including Sojern, Amadeus, Meta, Google, TikTok, Snapchat, and Reddit.
• Trace and improve data flows across frontend systems, backend services, and data pipelines to maintain accurate attribution, reservation status, and revenue data.
• Modify related reservation systems when needed to close measurement data gaps and improve reliability and scale.
• Partner with product, commercial, marketing, and engineering teams to define measurement needs, test end-to-end behavior, and monitor production data quality and delivery.

Requirements

• At least five years of full-stack software engineering experience.
• Ability to develop and maintain backend services written in Java and TypeScript.
• Experience building user-facing applications with React.
• Working knowledge of GraphQL microservices.
• Experience integrating external services through APIs and SDKs.

Nice to have

• Experience with paid media measurement, conversion tracking, or marketing attribution.
• Experience with event-driven services and data pipelines.
• Familiarity with privacy-aware tracking and consent signals.
• Experience ensuring data quality or debugging reliability issues across multiple services.

Culture & Benefits

• Hybrid work in Kaunas with a global, distributed team; occasional communication outside regular business hours may be required for international collaboration, restaurant partners, or urgent matters.
• 20 days of paid vacation, enhanced paid parental leave, and a paid day off for your birthday.
• Health and life insurance through Compensa.
• Work from almost anywhere for up to 20 days per year.
• Company-paid therapy sessions, Headspace subscription, and an annual company-wide week off.
• Development Dollars, leadership development, on-demand learning, travel discounts, and Employee Resource Groups.