Senior Full-Stack Engineer

Infobip

Senior Full-Stack Engineer developing large-scale customer engagement and automation platforms at Infobip. Focus on backend development in Java and collaboration with cross-functional teams.

Posted 5/23/2026full-timeZagreb • 🇭🇷 CroatiaSeniorWebsite

Tech Stack

Tools & technologies

Distributed SystemsJavaReactTypeScript

About the role

Key responsibilities & impact

Design, build, and maintain complex backend services primarily using Java and the JVM ecosystem.
Work on distributed, multithreaded systems that support automation, orchestration, and 2-way communication platforms such as AgentOS.
Contribute to feature development and unification across multiple SaaS products, including Answers and Moments and AI Agents.
Contribute to frontend development using React and TypeScript.
Collaborate closely within a small, cross-functional initiative team, participating in plannings, reviews, and retrospectives.
Write and maintain unit and integration tests to ensure reliability, scalability, and long-term maintainability of the systems.
Apply an AI-first mindset, including exploring and integrating AI or LLM-based capabilities into product features where relevant.

Requirements

What you’ll need

5+ years of professional experience as a software engineer, with a strong focus on backend development.
Strong expertise in Java and object-oriented programming; JVM experience is essential.
Solid understanding of multithreading, concurrency, and building complex, scalable systems.
Experience working with distributed systems and multiple interconnected services.
Familiarity with frontend technologies such as React and TypeScript, with willingness to contribute occasionally.
Ability to work effectively in small teams, taking ownership and driving solutions end to end.
Fluent in English, both spoken and written.

Benefits

Comp & perks

Financial rewards & recognition - A fair compensation aligned with your experience, industry, and market standards, performance-driven bonuses, regular reviews to support your growth and recognize your contributions, and a culture that values your impact.
Flexible work arrangements - We combine in-person collaboration with remote work and flexible working hours, because great ideas happen everywhere - and not always between 9 and 5.
ESOP (Employee Stock Ownership Plan) - As an Infobip employee, you’ll have the opportunity to share in our company’s success through stock options.
Work-life balance and Well-being - We offer time off when you need it, special leave days for life’s big moments, and a flexible hybrid work model tailored to local regulations.
Career mobility - Your career is a journey. With internal mobility, upskilling, and mentorship, we help you shape your path.
Professional development - Learning never stops. Onboarding, mentorship, and training programs help you grow - no matter where you start.
International mobility - Ready to take your career global? Explore short and long-term opportunities in our Hubs worldwide.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

JavaJVMmultithreadingconcurrencybackend developmentSaaSReactTypeScriptunit testingintegration testing

Soft Skills

collaborationteamworkownershipproblem-solvingcommunication