Backend Java/Python Developer

RESPONSIBILITIES: Design, develop and maintain backend and data-processing components. Develop applications and processes using Java, Python and SQL. Implement business and calculation logic according to functional requirements. Develop and integrate REST APIs and microservices. Develop data loading, processing and transformation capabilities. Develop and maintain analytical components in Atoti / ActiveViam when required. Implement measures, calculations and analytical capabilities within Atoti. Analyze and optimize performance, memory usage and scalability. Perform data validation and reconciliation across different components and systems. Troubleshoot technical, data and performance issues. Implement unit and integration tests. Support testing, certification, deployment and production releases. Maintain technical documentation and development best practices. Experience: +2 years of experience in software development, preferably in data-intensive or analytical environments. MANDATORY SKILLS: Java Python SQL REST APIs / Microservices Data processing & transformation Software design and development Testing & debugging Performance optimization Git / version control C1 English Level DESIRABLE: Atoti / ActiveViam Big Data / DataLake Cloud Control-M Jira / Confluence What do we offer you? Long term Employment contract Training and career development Possibility to be part of a multicultural team and work on international projects If you are passionate about data, development & tech, we want to meet you! Talan Spain’s commitment to non-discrimination based on gender, race, ideology, or any other reason, in accordance with the company’s "Equality Plan" and the current regulations on gender equality between women and men (Royal Decree-Law 6/2019). Talan – Positive Innovation Talan is an international consulting group specializing in innovation and business transformation through technology. With over 7,200 consultants in 21 countries and a turnover of €850M, we are committed to delivering impactful, future-ready solutions. Talan at a Glance Headquartered in Paris and operating globally, Talan combines technology, innovation, and empowerment to deliver measurable results for our clients. Over the past 22 years, we’ve built a strong presence in the IT and consulting landscape, and we’re on track to reach €1 billion in revenue this year. Our Core Areas of Expertise Data & Technologies: We design and implement large-scale, end-to-end architecture and data solutions, including data integration, data science, visualization, Big Data, AI, and Generative AI. Cloud & Application Services: We integrate leading platforms such as SAP, Salesforce, Oracle, Microsoft, AWS, and IBM Maximo, helping clients transition to the cloud and improve operational efficiency. Management & Innovation Consulting: We lead business and digital transformation initiatives through project and change management best practices (PM, PMO, Agile, Scrum, Product Ownership), and support domains such as Supply Chain, Cybersecurity, and ESG/Low-Carbon strategies. We work with major global clients across diverse sectors, including Transport & Logistics, Financial Services, Energy & Utilities, Retail, and Media & Telecommunications.