Senior Software Engineer (Java)

Remote from: Europe
Annual salary: Undisclosed
Salary information is not provided for this position. Check our Salary Directory to estimate the average compensation for similar roles.
Department: Software Engineering
Employment type: Full Time,
Job posted: 25 Jun 2026
Apply before: 25 Jul 2026
Experience level: Senior
Views / Applies: 50 / 19

About company

About Zartis

Your Compass for AI Transformation.

Computer Software
2009

Actively Hiring

AI Summary

Zartis is a global AI transformation and technology consulting partner seeking a Senior Software Engineer (Java) for a travel technology project. The role involves modernizing a legacy JBoss-based platform into cloud-native microservices using event-driven architectures and AI-assisted tools. You will develop backend services, build REST APIs, and manage containerized applications on AWS ECS. The position offers 100% remote work, career growth opportunities, and training allowances. Ideal candidates have 6+ years of Java experience and expertise in Spring Boot, Kafka, Docker, and CI/CD pipelines.

Role DNA

Job Complexity

Easy Hard

Pace & Pressure

Relaxed Fast-paced

Autonomy Level

Guided Full Ownership

Communication Load

Independent Highly Collaborative

AI Insight This is a senior role requiring expertise in complex legacy modernization, microservices, and event-driven architectures, which presents significant technical challenges.

Salary Analysis

AI Insight The job listing does not specify a salary, but for a Senior Software Engineer (Java) in the US market, the typical range is $110,000 to $180,000, with a median of around $140,000. Given the remote nature and seniority level, the compensation should be competitive within this range.

Key Skills

Java Spring Boot Microservices Kafka Docker AWS ECS CI/CD Jenkins Legacy Modernization Event-Driven Architecture

Cover Letter Sample

Dear Hiring Manager,

I am excited to apply for the Senior Software Engineer (Java) position at Zartis. With over 6 years of experience in backend Java development and a strong background in microservices and cloud-native architectures, I am confident in my ability to contribute to the modernization of your travel technology platform.

I have extensive experience with Spring Boot, Kafka, and Docker, and have successfully led legacy-to-cloud migrations using event-driven patterns. My proficiency with CI/CD pipelines (Jenkins, Gradle) and AI-assisted development tools aligns perfectly with the requirements of this role.

I am particularly drawn to Zartis's mission of driving innovation through AI and cloud-native engineering. I thrive in collaborative, distributed team environments and am passionate about mentoring junior engineers and promoting best practices.

Thank you for considering my application. I look forward to the opportunity to discuss how my skills can help Zartis achieve its goals.

Sincerely,
[Your Name]

Possible Interview Questions

Can you describe your experience with migrating a legacy monolithic application to microservices? What patterns did you use?

I have experience with the Strangler Fig pattern, where I incrementally replaced monolithic functionalities with microservices. I used anti-corruption layers to ensure seamless integration between old and new systems, and employed event-driven communication via Kafka to decouple services.

How do you design and implement event-driven integrations using Kafka?

I use Spring Cloud Stream for binding Kafka topics to microservices. I design idempotent consumers and use dead letter queues for error handling. I also ensure proper partitioning and schema management with Avro or JSON Schema.

Explain your approach to ensuring code quality and promoting best practices in a distributed team.

I conduct regular code reviews with a focus on readability, testability, and adherence to SOLID principles. I advocate for pair programming and use static analysis tools like SonarQube. I also document architectural decisions and share knowledge via tech talks.

Describe a time you used AI-assisted development tools like GitHub Copilot. How did it improve your workflow?

I used GitHub Copilot to generate boilerplate code and unit tests, which reduced repetitive tasks by 30%. It also helped in suggesting idiomatic patterns, allowing me to focus on architectural design and complex logic.

How do you handle the challenges of working on a large-scale platform modernization initiative?

I break down the modernization into manageable phases, prioritize high-value modules, and ensure backward compatibility. I rely on feature toggles and canary releases to mitigate risks, and maintain close communication with stakeholders to align expectations.

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.