Mid-Senior Backend Engineer

is a leading provider of workplace management solutions, specialising in optimising the utilisation and performance of commercial spaces, as well as providing solutions to help thousands of facility managers, energy auditors, and building owners around the world to become more sustainable. Our innovative technologies and services empower organisations to create smarter, more efficient, and engaging workplaces, enhancing productivity and well-being.

At Spacewell, we are full of contagious energy, hard work, and passion for what we do. We are fully committed to encouraging an environment where everyone is heard and feels a sense of belonging. We are proud to have a multicultural team that acknowledges a variety of backgrounds, skills, and perspectives.

The Opportunity

The engineering department of Spacewell is currently looking for a mid-senior backend engineer to join the core team. 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 of the business domain (DDD). We are open to both onsite and remote candidates residing in Spain, have a valid work permit for Spain, and would enjoy meeting the team during the year in our Barcelona office.

You will

Be part of a backend team composed of Software Developers and a Product Manager, working together through the full process of agile software development.

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

Ensure the platform runs smoothly, managing millions of measurements daily, considering security, performance, and concurrency.

Participate in a deep refactor of core components : rethinking models, extracting monolith functionalities into independent services, improving performance and scalability, and query optimization.

Deploy changes in production using CI / CD pipelines : owning the entire lifecycle from pull request to production (testing, quality metrics, QA, and observability).

Maintain accountability and proficiency with team code, keeping it clean and simple.

Dedicate one day per sprint (two weeks) to free choices for innovation with new technologies, tools, or approaches.

Requirements

Team player with good social skills and enjoyment in collaborative problem-solving.

Product mindset, understanding customer pains and problems to build the best solutions.

Pragmatic approach, balancing quality, performance, and time-to-market.

Experience using Docker containers and dockerizing microservices.

Experience with relational and / or non-relational databases (PostgreSQL, MongoDB, BigQuery).

Knowledge of SOLID principles and Clean Architecture.

Familiarity with the testing pyramid.

Nice to have

Experience in DDD and clean architecture.

Experience with microservices patterns.

Knowledge of asynchronous, reactive programming, and functional paradigms.

Experience with Cloud Native Infrastructure (lambda functions, buckets, managed services).

Experience in profiling and monitoring tools.

Knowledge of the Energy sector.

We offer

Flexible hours and early Friday quitting.

Office in central Barcelona.

Positive work environment with valued employees.

Multinational team with 10+ nationalities.

Flexible compensation : kindergarten, transportation, food.

23 holiday days / year, plus additional based on tenure and birthday off.

Company courses, events, private health insurance, gym memberships.

Regular team events and referral bonuses.

Team values

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

Be an expert, sharing knowledge simply.

Stay positive, passionate, and optimistic.

Be humble, self-aware, and open to learning.

Be sustainable, caring for the planet.

Hiring Process

At Spacewell Energy, we celebrate diversity and are committed to an inclusive workplace. We welcome applicants from all backgrounds. Our process includes a 30-60 minute call with People and Development Leaders, followed by a 2-hour technical session involving a live programming exercise in Java. We will extend a job offer or provide feedback based on the outcome.

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