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Senior Full-Stack Engineer - Java/React

Zagreb (Croatia)🌐 Remote💼 Full-time🗓 2026-07-15 → 2026-07-31

Core

Building and evolving large-scale customer engagement and automation platforms, specifically the AgentOS solution, with a strong focus on backend architecture and distributed communication flows.

Role type

Senior Full-Stack Engineer (Backend-focused)

Builds

Large-scale customer engagement and automation platforms (AgentOS, Answers, Moments, AI Agents)

Domain

Cloud communication, SaaS, AI/LLM integration

Deliverable

production ML models | product features

Required skills

Java, JVM ecosystem, multithreading, concurrency, distributed architectures, system design, React, TypeScript

Preferred skills

Kotlin, Scala, AI/NLP/LLM integration, mentoring

Technologies

Java, JVM, React, TypeScript, Kotlin, Scala

Responsibilities

Design and maintain complex backend services; develop distributed multithreaded systems for automation and orchestration; contribute to frontend development; write and maintain unit and integration tests; integrate AI/LLM capabilities into product features.

Seniority

Senior, hands-on IC

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