Java & LLM/AI Software Engineer - Barcelona (Hybrid)

WIZELINE; Barcelona; Presencial; EUR 85.000 - 125.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

High-Impact Environment

Commitment to Professional Development

Flexible and Collaborative Culture

Global Opportunities

Vibrant Community

Total Rewards

Descripción de la vacante

Wizeline in Barcelona is seeking a Senior Software Engineer to design and scale our AI-powered translation platform. You will build high-performance microservices in Java and Spring Boot, and integrate LLM APIs to support multilingual content workflows.

Join a collaborative, fast-growing team. You’ll own REST APIs and Kafka-driven pipelines, ensure reliability with CI/CD and monitoring, and partner with product and engineering to drive global expansion.

Formación

• Proven backend engineer with Java and Spring Boot for scalable APIs.
• Experience integrating LLM/AI APIs and MT workflows.
• Hands-on with cloud platforms (GCP) and microservices architectures.
• Familiarity with event-driven pipelines and Kafka.
• Experience with Git, CI/CD, and automated testing in Agile teams.
• Excellent technical communication in English.

Responsabilidades

• Develop and scale core translation services and backend applications using Java and Spring Boot.
• Integrate AI/LLM translation capabilities and APIs into content processing infrastructure.
• Improve translation quality, system scalability, cost efficiency, and latency.
• Build REST APIs and Kafka-driven pipelines for high-volume content tasks.
• Implement monitoring, logging, error handling, and automated testing.
• Drive performance tuning and architecture enhancements for increasing translation volumes.
• Support production deployments, CI/CD pipelines, and monitoring.
• Collaborate with cross-functional teams on technical design and documentation.
• Contribute to international expansion and multilingual content workflows.

Conocimientos

Java

Spring Boot

GCP

Apache Kafka

LLMs

AI APIs

Machine Translation

Git

CI/CD

Automated testing

Agile methodologies

English communication

Herramientas

Kafka

Descripción del empleo

We are:

Wizeline, a global AI-native technology solutions provider, develops cutting-edge, AI-powered digital products and platforms. We partner with clients to leverage data and AI, accelerating market entry and driving business transformation. As a global community of innovators, we foster a culture of growth, collaboration, and impact.

With the right people and the right ideas, there’s no limit to what we can achieve

Are you a fit?

We are seeking a skilled Senior Software Engineer to join our team in building and scaling our next-generation automated translation and localization platform. In this role, you will work closely with our engineering and product teams to integrate state-of-the-art AI/LLM models and machine translation engines into our enterprise content-processing ecosystem.

You will design and implement high-performance microservices, event-driven pipelines, and robust APIs to support global media expansion, multi-language publishing, and real-time content delivery.

Key Responsibilities

• Platform Development: Develop and enhance core translation services and backend applications using Java and Spring Boot.

• AI & LLM Integration: Integrate cutting‑edge AI/LLM translation capabilities and direct LLM/machine translation provider APIs into our content processing infrastructure.

• Optimization & Evaluation: Support direct integrations with translation providers; continually evaluate and improve translation quality, system scalability, cost efficiency, and latency.

• API & Event Pipelines: Build highly available, reliable REST APIs and Kafka‑driven asynchronous pipelines for processing high‑volume content and translation tasks.

• Operational Excellence: Implement end‑to‑end monitoring, logging, error handling, retries, automated testing, and validation mechanisms for complex translation workflows.

• Scale & Performance: Drive performance tuning and architecture enhancements to handle increasing translation volumes seamlessly.

• Production Support: Assist with production deployments, CI/CD pipelines, system monitoring, and troubleshooting to ensure platform stability.

• Cross‑Functional Collaboration: Partner with cross‑functional engineering teams, product managers, and key stakeholders on technical design, system architecture, code reviews, and documentation.

• Global Expansion: Contribute to the long‑term evolution of the platform to support international expansion, additional languages, and diverse content formats across major media brands (including WSJ and international outlets).

Qualifications & Skills

Required:

• Core Backend: Proven expertise in Java and Spring Boot for building scalable RESTful APIs and enterprise microservices.

• Cloud & Infrastructure: Hands‑on experience with Google Cloud Platform (GCP) or other major public cloud environments.

• Event‑Driven Architecture: Experience with Apache Kafka or similar messaging systems for event‑driven architectures and streaming pipelines.

• AI / Translation Tech: Experience integrating LLMs, AI APIs , or Machine Translation (MT) technologies and multilingual content workflows.

• Software Engineering Practices: Proficiency with Git, CI/CD pipelines, automated testing (unit, integration, e2e), code reviews, and Agile methodologies.

• Communication: Excellent technical communication skills with fluency in written and spoken English.

Preferred / Nice to Have:

• Prior experience building or maintaining content management platforms (CMS), digital publishing systems, or media workflows.

• Experience evaluating LLM prompt engineering, fine‑tuning, or MT quality estimation metrics (e.g., BLEU, COMET).

What we offer:

• A High‑Impact Environment
• Commitment to Professional Development
• Flexible and Collaborative Culture
• Global Opportunities
• Vibrant Community
• Total Rewards

*Specific benefits are determined by the employment type and location.

Find out more about our culture here.