Backend Engineer (Java) (€50K - €55K)

One of the companies with which we collaborate in Joppy, a leading provider of workplace management solutions, is looking for a BACKEND ENGINEER (Java or Kotlin) to join its team in Spain (Hybrid in Barcelona - 1 day/week at office).

The engineering department is currently looking for a Senior Backend Engineer. We are looking for engineers who embrace software craftsmanship and have a

background in either Java or Kotlin. We prioritise the use of Agile methodologies and XP practices such as TDD, pairing and CI/CD, as a basis for delivering high-quality code frequently,

while taking care about the business domain (DDD).

You will

● Be part of a team that is composed of Software Developers and a Product Manager. Working together in the full process of agile software development.

● Collaborate closely with various stakeholders, including the infrastructure team, customer success and other development teams.

● Ensure that the platform runs smoothly, by taking into account security, performance and concurrency in the features you work on.

● Be involved in a deep refactor of some of our core components: rethinking models, extracting monolith functionalities into independent services, performance and scalability

improving, query optimizations.

● Deploy your changes in production using CI/CD pipelines: own the whole lifecycle from the pull request to production (testing, software quality metrics, QA & observability in

production).

● Be accountable and proficient with the code that the team writes, keeping it clean and simple.

● One day per sprint of two weeks is booked for free choices. The goal of free choices is to try to innovate with new technologies/tools/approaches to improve our products or

methodologies.

● Work with our technical stack and AI tools like Perplexity or GitHub Copilot.

Requirements

● Team player: you have good social skills and you enjoy working with people to solve nproblems together.

● Product mindset: you believe that understanding the pains and problems of the customer/user is crucial to build and deliver the best solution.

● Pragmatic: understand the urgency and importance of the issue that you work on, balancing quality, performance and time-to-market.

● Fluent in JVM languages (Java 8+, Kotlin).

● Knowledge of programming languages such as Python and/or JavaScript (or others)

● Experience using Docker Containers and dockerizing micro-services.

● Experience using relational and/or non-relational databases (e.g., PostgreSQL, MongoDB, BigQuery)

● Experience in microservices patterns

● Knowledge of the SOLID principles and Clean Architecture.

● Familiarity with the testing pyramid.

● Fluent in English.

Nice to have

● Experience in DDD and event-driven architectures

● Knowledge of asynchronous, reactive programming principles and the functional programming paradigm

● Experience using Cloud Native Infrastructure (e.g., lambda functions, buckets, managed services, etc.).

● Experience in profiling (memory, cpu, I/O) and service metrics using monitoring tools.

● Knowledge of the Energy sector.

We offer

● Flexible working hours and possibility of early quit Friday.

● Hybrid work model.

● Office in the city centre of Barcelona.

● An exciting and positive work environment where you are valued.

● A friendly and talented group with 10+ different nationalities.

● Flexible compensation scheme: kindergarten, transportation and food with UP Spain.

● 23 holiday days per year (flexible policy).

● Up to 5 additional holidays based on tenure.

● 1 additional birthday day off.

● Company-sponsored courses and attendance to events.

● Discounted private health insurance and gym memberships.

● Regular team events.

● Referral bonus for new hirings.

Team values

● Be human: authentic, open, caring and transparent.

● Be an expert: share your knowledge in a simple way.

● Stay positive: be passionate and optimistic.

● Be humble: self-aware and open to learning.

● Be sustainable: care about the planet and the ecological footprint.

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