About Cronos Europa Portugal
Cronos Europa Portugal is the Lisbon delivery centre of Cronos Europa, part of the Cronos Group — a technology federation of 9,000+ professionals and 600+ competence centres across Europe. From our office at IDB Lisbon we deliver application development, architecture, and IT operations for major European organisations, working as an integrated nearshore extension of our clients' teams.
This position is with Cronos Europa Portugal: the person contracts directly with us, as an employee or as a B2B contractor, joins our Lisbon team and is assigned to a long-term client engagement.
About the client
A major European organisation operating mission-critical aviation systems
The client's engineering teams work closely with its functional experts to make European aviation safer and more efficient. They build a wide variety of data-driven solutions that combine operational expertise, technical expertise and uniquely valuable European aviation data.
The solutions run mainly on Microsoft Azure and are deployed through Azure DevOps pipelines. Teams follow SAFe / Agile. AI-assisted development is part of how the teams work, and the client values demonstrated experience over familiarity with the concepts.
The role includes regular work on site at the client in Brussels: about 30 working days per year, typically 5 consecutive working days every 2 months. There is some flexibility in how these days are spread. Candidates must accept this from the start.
About the Role
We are looking for senior Backend Developers to join one of the client's development teams and build and run the services behind its solutions.
The current stack is Java and Spring Boot, running on Microsoft Azure and deployed through Azure DevOps.
The shape of the profile
A senior Java / Spring Boot engineer who designs, builds and runs services in production - and closely matches every technical requirement below.
The client prefers full stack developers. Backend candidates are considered when they are strong and match the technical requirements closely: Java and Spring Boot, Azure and Azure DevOps, PostgreSQL and Oracle, and several architectural styles.
Key Responsibilities
BUILD
- Design and build backend services and APIs
- Integrate with other systems through well-defined contracts
- Design and evolve the data model for each solution
ENGINEERING PRACTICE
- Apply clean code, automated testing, continuous integration and deployment
- Take part in design and code reviews
RUN
- Run your services in production: monitoring, alerting, incident response
WORKING IN THE TEAM
- Refine requirements with the Product Owner and functional experts, and assess technical feasibility
- Review requirements, challenge assumptions when needed, and raise concerns about feasibility or clarity
Requirements
MANDATORY
- 5+ years building production backend services with Java and Spring Boot
- Strong software design and enterprise integration patterns, with the judgement to pick the right one or keep it simple
- Experience with several architectural styles - for example hexagonal, modular monolith, microservices, event-driven
- Hands-on Microsoft Azure and Azure DevOps
- Data modelling and database design - PostgreSQL and Oracle
- Solid delivery practice: automated testing, quality gates, DevSecOps
- Experience in SAFe / Agile teams
- Experience with AI-assisted development, including handling the problems it introduces
- Fluent English, written and spoken - see the language requirement below
SENIORITY
- Senior - minimum 5 years building production backend services with Java and Spring Boot.
LANGUAGE - HARD REQUIREMENT
- Fluent English, written and spoken, is mandatory - C1 is the level we are aiming for. All project work, documentation and meetings happen in English with an international team. French is a plus.
PREFERRED / ADDED VALUE
- Event-driven systems - Kafka, Azure Service Bus
- Cosmos DB
- Performance testing
- Some front-end experience (React / TypeScript) - brings the candidate closer to the preferred full stack profile
- French
Informations
- Contract Direct with Cronos Europa Portugal: employment or B2B contractor, no intermediaries
- Engagement Full-time
- Location IDB Lisbon - Praca Jose Queiros, 1, Bloco C, 4.o andar
- Office presence Minimum 3 days per week on site
- Travel About 30 working days per year on site in Brussels (typically 5 consecutive days every 2 months)
- Start Expected from January 2027 (to be confirmed)
Why Cronos Group?
We’ll propose you:
- An attractive salary package
- A good work-life balance environment
- The assurance of working in cutting-edge technologies in an entrepreneurial spirit.
- The opportunity to develop your skills thanks to tailor-made training courses according to your needs
- A good job in a friendly place
If you wish to integrate a dynamic structure on a human scale while working with the latest technologies, don't wait anymore and join Cronos!
Skills Required
- At least 5 years building production backend services with Java and Spring Boot
- Strong software design and enterprise integration patterns experience
- Experience with multiple architectural styles, such as hexagonal, modular monolith, microservices, or event-driven
- Hands-on experience with Microsoft Azure and Azure DevOps
- Data modelling and database design experience with PostgreSQL and Oracle
- Experience with automated testing, quality gates, and DevSecOps
- Experience working in SAFe or Agile teams
- Experience with AI-assisted development and its associated challenges
- Fluent written and spoken English; C1 level is targeted
- Event-driven systems experience with Kafka or Azure Service Bus
- Cosmos DB experience
- Performance testing experience
- Some front-end experience with React or TypeScript
- French language skills
What We Do
Cronos Europa is an IT and digital communications company uniquely dedicated to serving the European institutions, agencies and bodies. From the European Union to EUROCONTROL, we partner with a range of supranational and interinstitutional authorities. Our mission is to arm them with the tools they need to thrive in the digital age. Every aspect of our organisation is designed to complement their capabilities - from our people to our processes and our premises. Our brand combines the expertise of former companies Cronos International and C-Dev, with the creative skills of Inspiiro and the breadth of capabilities of the Cronos Group. Today, Cronos Europa employs over 1,000 people in offices across Belgium, Luxembourg and the Netherlands, serving institutions across diverse framework contracts. Cronos Europa is part of the Cronos Group, one of the largest IT service providers in the Benelux, employing over 8,000 people across 200 competence centres. By leveraging the Group’s resources, Cronos Europa can help clients extract value from new and emerging technologies, for everything from Artificial intelligence to Zg Quantum. For spontaneous applications: https://cronoseuropa.breezy.hr/p/7a64ee973c6701-spontaneous-application?state=published
