Senior Software Engineer (Java)

The company and our mission: Zartis is a global AI transformation and technology consulting partner where talented engineers and technologists work on cutting edge innovation. We partner with ambitious organizations to design, build, and scale technology solutions that deliver real impact. Our teams bring deep expertise in AI driven platforms, secure API architectures, and cloud native engineering. You will work on meaningful projects that accelerate the adoption of advanced technologies, from strategy and discovery through to full product delivery, helping turn complex challenges into measurable outcomes. With engineering hubs across EMEA and LATAM, and long term partnerships in financial services, healthcare and life sciences, and energy and climate, we offer opportunities to work on projects that truly matter. Here, you will not just build technology, you will drive business impact and grow your career alongside industry leaders. We are looking for a Senior Software Engineer (Java) to work on a project in the travel technology industry. The project: Our teammates are talented people that come from a variety of backgrounds. We’re committed to building an inclusive culture based on trust and innovation. You will be part of a distributed team developing new technologies to solve real business problems leading the modernisation of a complex travel technology platform, helping to transform legacy JBoss-based systems into scalable, cloud-native microservices using modern engineering practices, event-driven architectures, and AI-assisted development tools. We are looking for someone with good communication skills, ideally with experience making decisions, being proactive, used to building software from scratch, and with good attention to detail. What you will do: Develop and modernise backend services, helping migrate functionality from a legacy JBoss monolith to microservices. Build event-driven integrations using Kafka and Spring Cloud Stream. Design and maintain REST APIs and integration layers between legacy and modern systems. Deploy and manage containerised applications using Docker and AWS ECS. Contribute to CI/CD improvements using Jenkins and Gradle to accelerate delivery. Participate in code reviews and promote engineering best practices. Collaborate with distributed teams to deliver scalable, high-quality solutions. Act as an AI champion, supporting the adoption of AI-assisted development tools and best practices. What you will bring: 6+ years of experience in backend Java development. Experience with Spring Boot, microservices, and event-driven architectures. Knowledge of Kafka or similar messaging technologies. Familiarity with Docker, AWS ECS, and cloud-native environments. Experience with CI/CD pipelines, Jenkins, and Gradle. Proven experience working with legacy systems and modernisation initiatives. Strong communication skills and experience collaborating in distributed teams. Experience using AI-assisted development tools such as GitHub Copilot, Claude, or similar. Nice to have: Experience with anti-corruption layer or strangler fig patterns in legacy modernisation projects. Previous experience with JBoss-based applications. Background in technical mentoring or supporting other engineers. Experience working on large-scale migration or platform modernisation initiatives. What we offer: 100% Remote Work WFH allowance: Monthly payment as financial support for remote working. Career Growth: We have established a career development program accessible for all employees with a 360º feedback that will help us to guide you in your career progression. Training: For Tech training at Zartis, you have time allocated during the week at your disposal. You can request from a variety of options, such as online courses (from Pluralsight and Educative.io, for example), English classes, books, conferences, and events. Mentoring Program: You can become a mentor in Zartis or you can receive mentorship, or both. Zartis Wellbeing Hub (Kara Connect) : A platform that provides sessions with a range of specialists, including mental health professionals, nutritionists, physiotherapists, fitness coaches, and webinars with such professionals as well. Multicultural working environment: We organize tech events, webinars, parties, and activities to do online team-building games and contests.