Backend Engineer

xelerate.tech; Porto; À distance; EUR 60 000 - 90 000; Plein temps

Avantages offerts par ce poste

Remote-friendly environment

Attractive salary & benefits

Great work-life balance

International career opportunities

Focus on individual development

Engaged tech community

Résumé du poste

Xelerate is seeking a Backend Engineer to design and build the services behind a European B2B marketplace. You will develop robust backend systems in Java with Quarkus, aligning with cloud-native, microservices practices on Azure.

Collaboration with frontend, product and DevOps is essential to deliver secure, scalable software. You will work on APIs, data integration, and end-to-end DevOps, including Docker containers and CI/CD pipelines, while maintaining quality through tests and reviews.

Qualifications

• Solid professional experience with Java 17+ and Quarkus.
• Strong understanding of RESTful API design and microservices architecture.
• Experience with testing frameworks such as JUnit and Mockito.
• Familiarity with Docker, Kubernetes, and CI/CD pipelines.
• Experience with Microsoft Azure, Infrastructure as Code (Terraform or Bicep), observability tools, or messaging systems (Kafka).
• A pragmatic mindset with ownership of features from design to production.
• Fluency in English (spoken and written); German is a plus.

Responsabilités

• Design, develop, and maintain scalable backend services and RESTful APIs using Java and Quarkus.
• Model and expose clean JSON contracts for frontend and services.
• Integrate with core enterprise systems, databases, and third-party services.
• Turn B2B processes (invoicing, payments, claims) into reliable services.
• Write unit and integration tests and participate in code reviews and standards.
• Containerize services with Docker, contribute to CI/CD and Kubernetes deployments.

Connaissances

Java (17+)

Quarkus

Spring Boot

RESTful API design

Microservices architecture

JUnit

Mockito

DevOps practices

English fluency

German (plus)

Outils

Docker

Kubernetes

CI/CD pipelines

Terraform

Bicep

Kafka

Azure

Description du poste

You have the opportunity to join our team and tackle business challenges in a dynamic, purpose-driven environment characterized by close collaboration with business stakeholders.

As a Backend Engineer, you will design and build the services behind a European B2B marketplace platform for a leading European trade and services cooperation connecting thousands of suppliers and hundreds of retailers. The platform brings a growing set of digital services for retail and industry together in one modern, cloud-native experience on Microsoft Azure.

You will develop robust backend services with Java and Quarkus, and care about how they are built, shipped and run, working closely with the frontend, product and DevOps colleagues who share the platform with you.

Your Role and Responsibilities:

• Backend Services & APIs: Design, develop, and maintain scalable backend services and RESTful APIs using Java and Quarkus, following cloud-native and microservices best practices.
• API Contracts: Model and expose clean, well-structured JSON contracts that the frontend and other services rely on, ensuring consistency and maintainability.
• Integration & Data: Integrate with core enterprise systems, databases, and third-party services, handling data persistence, transformation, and orchestration.
• Business Processes: Turn complex B2B processes between retailers and suppliers, such as invoicing, payments and claims handling, into reliable, well-tested services.
• Quality & Delivery: Write robust unit and integration tests, and contribute to code reviews and engineering standards.
• DevOps Mindset: Take part in the full lifecycle of your services: containerize them with Docker, contribute to CI/CD pipelines and Kubernetes deployments, and help monitor and improve how they run in production.

Your Skills and Experiences:

• Solid professional experience with Java (17+) and Quarkus; strong experience with Spring Boot is also highly valued, along with a willingness to work with Quarkus.
• Strong understanding of RESTful API design and microservices architecture.
• Experience with testing frameworks such as JUnit and Mockito.
• Familiarity with Docker, Kubernetes, and CI/CD pipelines, and a genuine interest in DevOps practices and in owning your services in production.
• Experience with Microsoft Azure, Infrastructure as Code (such as Terraform or Bicep), observability tools, or messaging systems (such as Kafka) is a plus.
• A pragmatic mindset, with the ability to take ownership of features from design to production.
• A highly collaborative mindset with excellent communication skills to thrive in cross-functional Agile/Scrum teams.
• Fluency in English (spoken and written); German is a plus.

What you can expect from us:

• Remote-flexible environment;
• Highly attractive salary and benefits;
• Great work-life balance and flexibility;
• You will be part of a company where commitment, quality, and continuous improvement are core principles of our culture;
• Highly engaged tech community;
• International career opportunities;
• Focus on individual development.

About us:

xelerate.tech is passionate about software, tech, and people. We aim to attract the most talented engineers to deliver high-quality software products through highly performant teams.

A note from our team:

We know that applying for a new job can be a big step in your life and a bit intimidating, but also an opportunity to improve your professional and personal life. Don't worry, we've got you. We will be with you every step of the way. If you have any questions or concerns before applying, feel free to reach out to us at [e-mail]. We look forward to your application!