Who you are

- Extensive experience in Java backend development, with a solid understanding of the broader product development process
- A track record designing and implementing large-scale backend solutions in cloud environments, particularly AWS

- Sharp enough with frontend concepts (Vue.js) to use AI to build or modify a UI feature and know if what comes out is right. You don't need to be a Vue expert, but you can't be lost in it either

- Strong experience building RESTful APIs and microservices architectures

- Proficiency with both relational and non-relational databases (e.g., Couchbase)

- Expertise in automated testing (unit, integration, E2E), TDD, and CI/CD pipelines
- A solid grasp of observability tools and practices (e.g., Datadog): metrics, logs, traces

- Familiarity with build automation tools (Maven, Gradle) and Git-based workflows, including branching, merging and code review

- Strong debugging and troubleshooting skills, including with asynchronous callbacks, multi-threaded environments and parallel computing Hands-on daily use of AI coding assistants — writing prompts, reviewing AI-generated code, and using them to speed up real work
- An analytical mindset, good time management, and a genuine curiosity about new technologies

- Bachelor's degree in Computer Science, Software Engineering or a related field

- Experience with Nuxt, beyond core Vue

- Advanced performance tuning, caching and resource management, including Couchbase indexing and query optimization

- Experience in security, compliance or enterprise SaaS environments

- Ability to mentor other engineers, run code reviews, and facilitate technical workshops

What the job involves





- We're looking for a Full Stack Developer who is analytical, results-driven, and grounded in Java backend development.

Your center of gravity will be the backend: designing, building and maintaining the robust, scalable systems that power our SaaS platform in a high-transaction fintech and traveltech environment

- That said, this isn't a purely backend role. You don't need to be a frontend expert, but you need to be sharp enough to pick up a ticket that touches the UI, lean on AI to vibe-code your way through the Vue side of it, and get it done properly rather than handing it off. Most of your work will be backend; some of it won't be, and you should be able to move between the two without friction

- Architecture and APIs
- Design, develop and maintain scalable backend systems using Java

- Build and evolve public and internal APIs, applying best practices in API security and data handling to meet stringent compliance requirements

- Apply Hexagonal Architecture principles to keep systems modular, maintainable and testable

- Data and performance
- Work across relational and non-relational databases, including Couchbase, to design efficient, high-availability data models and queries for high-transaction workloads

- Proactively identify and resolve performance bottlenecks,



using observability tools like Datadog to monitor system performance

- Quality and reliability
- Ensure high-quality code through rigorous unit, integration and automated testing, and lead by example in code reviews

- Implement observability practices (metrics, logging, tracing) to monitor system health and catch issues before they become incidents

- Proactively identify technical debt and drive the improvements needed to keep the codebase clean

- Frontend collaboration
- Pick up frontend work in Vue.js when a feature calls for it, leaning on AI to vibe-code the UI side and working end-to-end rather than only on the backend half of a ticket

- Collaborate with the frontend team to keep the product consistent across the stack

- AI-assisted engineering

- Use AI coding assistants (Claude Code, GitHub Copilot and similar) as part of your daily workflow in implementation, testing, debugging and documentation

- Apply Spec-Driven Development: write clear specs up front and use them to guide and validate AI-assisted implementation, so AI-generated code stays reliable and maintainable

- Documentation and collaboration
- Create and maintain technical documentation that supports backend operations and team collaboration

- Work across disciplines to keep the product consistent and the customer experience solid

Benefits

- Competitive salary & progression framework

- Fun environment & company events

- Tax-free benefits: Transport, food, gym and childcare

- Versátil hours & Remote work options

- Spacious office in the heart of Barcelona with free coffee & beer

📌 Full Stack Developer (Barcelona)
🏢 Caravelo
📍 Barcelona