Senior Full-Stack Engineer - Java/React

Working at Infobip means being part of something truly global. With 75+ offices across six continents, we’re not just building technology — we’re shaping how more than 80% of the world connects and communicates. As employees, we take pride in contributing to the world’s largest and only full-stack cloud communication platform. But it’s not just what we do, it’s how we do it: with curiosity, passion, and a whole lot of collaboration. We operate with an AI-first mindset, embedding intelligent tools into our daily workflows to work smarter and more efficiently. Every role here benefits from and contributes to this approach. If you're looking for meaningful work and challenges that grow you in a culture where people show up with purpose, this is your opportunity. Let’s build what’s next, together. What this role is all about As a Senior Full-Stack Engineer in Infobip’s SaaS Base, you will work on large-scale customer engagement and automation platforms, including our AgentOS solution. These products power complex workflows, orchestration, and 2-way communication systems used across multiple communication channels globally. You will be part of small, initiative-based teams of 5–6 engineers within a larger organisation of 30 people tackling technically demanding problems around scalability, concurrency, and platform unification, with a strong focus on backend excellence and occasional contributions to the frontend when needed. What you’ll do 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. What makes you a strong fit 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. Nice-to-have qualifications Experience with Kotlin; Scala experience is acceptable as prior JVM exposure, even though it is not used internally. Exposure to AI, NLP, or LLM-based systems, especially integrating AI into production environments and adopting AI tools for solving day-to-day problems Experience working on large SaaS platforms with a broad set of customers and use cases. Interest in mentoring other engineers and contributing to knowledge sharing within the team. Why you'll love it here • 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. While some benefits may vary by location, our goal remains the same: to support your growth, well-being, and success - wherever you are. Diversity drives connection Infobip is built on diverse backgrounds, perspectives, and talents. We’re proud to be an equal-opportunity employer and are committed to fostering an inclusive workplace. No matter your race, gender, age, background, or identity — if you have the passion and skills to thrive, there’s a place for you here. All qualified applicants will receive consideration for employment without regard to race, color, ancestry, religion, age, sex, sexual orientation, gender, gender identity, national origin, citizenship, disability, veteran status or any other part of one's identity. Read more about our hiring process . #LI-TF1