Senior Software Engineer (Java)

How to use this kit

Ground every answer in facts on this page and the original listing. We never invent Glassdoor-style reviews or salaries that are not in our data.

Interview prep

• Walk through designing or changing a system under time/cost constraints.
• Explain how you gather limits from managers and peers before coding.
• Discuss Java service design, interfaces, and production install/release coordination.

Fit summary

Strong fit if you lead Java system design, requirement analysis, and multi-team delivery in Dublin on-site. Thin company-specific data—validate Cartrawler’s stack and travel product domain in the process.

Day in the role

As a Senior Software Engineer (Java) at Cartrawler in Dublin, expect to analyze requirements and system constraints, design and modify services within time and cost limits, and align with project managers, analysts, and other engineers on interfaces and performance. Senior work often includes advising on design trade-offs, coordinating installs or releases, and clarifying technical issues with stakeholders—grounded in Java delivery rather than generic coding only.

Skills to emphasize

• freeCodeCamp — Full Stack curriculum (free)
• Saylor Academy — Computer Science courses (free)
• CS50 (Harvard, via edX) (free to learn)
• Microsoft Learn — developer training paths (free to learn)

FAQ from this listing

Is this role remote?

No. The listing is Dublin-based with remote set to off-site work not indicated.

What does senior day-to-day emphasize?

Feasibility under constraints, cross-team design, stakeholder updates, and coordinating system changes—aligned with senior software engineering tasks.

Where can I upskill for free?

freeCodeCamp, Saylor CS courses, CS50, and Microsoft Learn paths listed above are free or free to learn.

Occupation tasks (O*NET)

Public-domain labor data — prepare examples for 2–3 of these.

• Analyze information to determine, recommend, and plan installation of a new system or modification of an existing system.
• Analyze user needs and software requirements to determine feasibility of design within time and cost constraints.
• Confer with data processing or project managers to obtain information on limitations or capabilities for data processing projects.
• Confer with systems analysts, engineers, programmers and others to design systems and to obtain information on project limitations and capabilities, performance requirements and interfaces.
• Consult with customers or other departments on project status, proposals, or technical issues, such as software system design or maintenance.
• Coordinate installation of software system.
• Design, develop and modify software systems, using scientific analysis and mathematical models to predict and measure outcomes and consequences of design.
• Determine system performance standards.

O*NET source

Role overview (listing rewrite)

Senior Software Engineer (Java) at Cartrawler in Dublin What This Role Involves As a Senior Software Engineer (Java), you will play a key role in building the technology that powers millions of travel experiences around the world. You'll design and deliver scalable backend services supporting our core platform, enabling seamless customer journeys, smarter business decisions, and stronger partner integrations. Core Duties Design and implement robust, scalable Java-based backend services Collaborate with a cross-functional engineering team to drive innovation and excellence in technology solutions Mentor junior engineers and contribute to the overall technical leadership of the team Ensure high performance, reliability, and maintainability of codebases Contribute to the continuous improvement of our core platform through iterative development cycles Skills & Qualifications Expertise in Java and related technologies (Spring, Hibernate, etc.) Experience with backend service design and implementation Aptitude for mentoring and leading a team of engineers Strong problem-solving skills and ability to work independently as well as collaboratively Passion for solving complex challenges using modern Java technologies Experience in building high-performing, scalable software solutions More About Cartrawler Tech that takes you places. At CarTrawler, we are the global travel tech company behind seamless connections between people, places and possibilities. From powering car rental to creating smarter ways to move, our mission is to make travel smoother for millions worldwide. Our culture is built on curiosity, collaboration, and craic (Irish for fun), where every idea counts, and every journey matters. Applying for This Role Ready to make an impact? Join us in shaping the future of high-performing software. If you're passionate about solving complex challenges with modern Java technologies and enjoy shaping the future of travel tech, we'd love to hear from you. To apply, complete your application directly on this page, or you'll be redirected to the employer's application platform to finish submitting there.

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Questions to ask them

• What does success look like in the first 90 days for this role?
• How is the team structured, and who would I work with most?
• What tools and systems does this role use daily?
• Is the work primarily based in Dublin, hybrid, or fully remote?