At ESO, we believe in the power of science to expand the frontiers of human knowledge. Our digital platforms are key to sharing this mission with the world - and we're looking for a skilled and proactive AEM Developer to help build, operate, and evolve the technical foundations of ESO's online presence.

In this role, you will contribute to the development of ESO's web platforms as Adobe Experience Manager (AEM) is introduced as the future core Content Management System. As part of ESO's Digital Communications team, you will help shape the technical implementation of a modern CMS landscape that supports ESO's public-facing communication platforms and enables teams across the organisation to publish content efficiently and reliably. You will develop and maintain AEM components and templates, work across frontend and backend systems, and contribute to building a robust, scalable, and user-friendly web platform.

During the transition phase, ESO's existing Django/Python-based CMS will continue to run in parallel. Your responsibilities related to the legacy system will focus on keeping it operational through maintenance and essential minor updates. In parallel, you will support the technical aspects of migrating existing content into AEM, ensuring that content structures, templates, and components enable an efficient and reliable transition, while primary development efforts remain centred on the new AEM-based platform.

Working closely with the Head of Digital Communications, the IT Department, and external providers, you will play an active role in shaping technical decisions related to AEM and the web frontend and help continuously improve ESO's digital platforms.

To succeed in this role, you should bring:

• Several years of professional experience in web development, covering both frontend and backend
• Hands-on experience with Adobe Experience Manager (AEM), preferably version 6.5
• Strong backend development skills, especially in Java, HTL, Sling Models, and OSGi
• Solid frontend proficiency in HTML5, CSS3/4, JavaScript (ES5/ES6), and Webpack
• Experience with Git, Maven, and modular design using AEM ClientLibs
• A proactive, problem-solving mindset and strong communication skills
• The ability to work independently and collaboratively in a cross-functional team and across ESO
• A desire to contribute to science communication and support ESO's public mission

Experience in the following areas would be an advantage:

• Experience with Django/Python-based CMSs or a strong willingness to learn
• Experience in large-scale content migration to AEM
• Experience coordinating with external development providers

This is a unique opportunity to help shape the technical core of ESO's digital platforms - and to play a key part in how we share the wonder of astronomy and the engineering behind our telescopes with the world.

Qualifications:

A university degree in computer science, software engineering, web development, or a related field is preferred. Equivalent professional experience with a strong track record in CMS development and full-stack web engineering will also be considered.

Language Skills:

An excellent command of English is essential. A working knowledge of German and/or Spanish would be an advantage.

Remuneration and Contract:

We offer an attractive remuneration package including a competitive salary, comprehensive pension scheme and medical, educational and other social benefits, as well as financial help in relocating your family and in placing your child/children in daycare.

Our Salary and career structure:

ESO's salary structure is based upon a range of career paths which reflect the nature and level of our roles. Each career path is made up of two or three grades which are used to further reflect experience and performance. The role of Web Developer is in Career Path V. Please follow this link for more details https://www.eso.org/public/jobs/conditions/intstaff/salary-structure/

ESO aims to support members of personnel in maintaining a good work-life balance (https://www.eso.org/public/jobs/conditions/intstaff/#work-life-balance) between their professional and private life. ESO is also committed to offering family-friendly support (https://www.eso.org/public/jobs/conditions/intstaff/#family-friendly-support), creating a work environment and policies which allow staff to balance their professional and private responsibilities through flexible working arrangements and financial support for families.

The contract is for a fixed term duration of three years, and is subject to successful completion of the probation period. There may be a possibility of extension(s) subject to individual performance and organisational requirements. For any further information, please visit ESO's conditions of employment (https://www.eso.org/public/jobs/conditions/). Please note that the contract policy and in particular the regulations concerning fixed-term and indefinite contracts are currently under review which may lead to changes in the contractual conditions applicable to this position.

Duty Station:

Garching near Munich, Germany.

Application:

If you are interested in working in areas of frontline science and technology and in a stimulating international environment, please visit http://www.eso.org for further details.

Applicants are invited to apply online at http://jobs.eso.org/. Applications must be completed in English and should include a motivation letter and CV. Within your CV, please provide the names and contact details of three persons familiar with your work and willing to provide a recommendation letter upon request. Referees will not be contacted without your prior consent.

Deadline for applications is 7 February 2026.

ESO Values

An important element in any successful employment relationship is harmony in values between an organisation and its people.

The ESO values are:

ESO strives for excellence through innovation.

ESO provides outstanding services to its communities.

ESO fosters diversity & inclusion.

ESO believes in the key role of sustainability for its future.

Achieving the above are recognized as only possible on the basis of personal values and attitudes that we expect from our employees: respect, integrity, accountability, commitment, collaboration, and clear & open communication.

Applicants to any ESO role are asked to reflect on their affinity with these values and advised they may be asked about them if called for interview.

Diversity

ESO has established diversity as an important value of the Organisation, is committed to providing an equal opportunities environment and is actively seeking to promote a diverse, equitable and inclusive workforce. Please visit https://www.eso.org/public/about-eso/sustainability/dei-at-eso/ for further details.

Nationality

No nationality is in principle excluded from employment at ESO, however, recruitment preference will be given to nationals of our Member States, host states and strategic partners: Australia, Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Ireland, Italy, the Netherlands, Poland, Portugal, Spain, Sweden, Switzerland, the United Kingdom and Chile, irrespective of gender, age, disability, sexual orientation, ethnicity or religion.