Senior Java Developer Consultant

Keystone Solutions; Brussel Hoofdstad; Hybrid; EUR 70,000 - 100,000; Full time

Job summary

Keystone Solutions in Brussels is seeking a Senior Java Developer Consultant to join a client-facing agile team. You will design, build, test and integrate valuable product increments within each sprint, while representing Keystone Solutions in the client environment.

The role offers a balanced mix of on-site and remote work (50/50), requiring strong Java/Spring Boot expertise, Docker and Kubernetes, microservices and cloud development, plus a solid grasp of architecture and security practices.

Qualifications

• 3+ years of relevant experience.
• Expert-level Java development with Spring Boot.
• Experience with Docker and Kubernetes.
• Experience with microservices.
• Cloud development skills.
• Strong understanding of architecture, including hardware, operating systems, networking, databases and middleware.
• Knowledge of methods, standards, security procedures and development tools.

Responsibilities

• Commit to helping the team deliver a product at the end of each sprint, collaborating with team members.
• Focus on completing the sprint backlog and delivering items per Product Owner guidance.
• Adhere to Scrum values: focused, committed, open, respectful and courageous.
• Collaborate with team members and contribute to knowledge sharing, open communication, continuous learning and value delivery.

Skills

Java

Spring Boot

Microservices

Cloud

Architecture

Development tools

Tools

Docker

Kubernetes

Job description

Mission Overview:

Keystone Solutions is hiring a Senior Java Developer Consultant for a consultancy mission with a client in Brussels. As a Keystone Solutions consultant, you will represent Keystone Solutions within the client environment, working as part of an agile team to design, build, test and integrate valuable product increments within each sprint. The working model is 50% on site and 50% homeworking.

Role and Responsibilities:

Under Keystone Solutions’ consultancy model, you will apply skills across analysis, design, development, testing and integration, complementing the expertise of other agile team members to deliver a product at the end of each sprint.

• Commit to helping the team deliver a product at the end of each sprint, going beyond your own specific knowledge domain to collaborate effectively with team members.
• Focus on completing the sprint backlog, including all elements the team must deliver in the sequence determined by the Product Owner according to added value for internal or external clients.
• Adhere to Scrum values: focused, committed, open, respectful and courageous.
• Collaborate closely with team members and actively contribute to knowledge sharing, open communication, continuous learning and the delivery of added value.

Required Experience and Technical Knowledge:

• At least 3 years of relevant experience.
• Expert-level Java development skills with Spring Boot.
• Experience with Docker and Kubernetes.
• Experience with microservices.
• Cloud development skills.
• Excellent understanding of architecture, including hardware, operating systems, networking, databases and middleware.
• Knowledge of methods, standards, security procedures and development tools.

Preferred Technical Knowledge:

• Experience with integration using different technologies, including distributed systems and mainframe technologies, as well as infrastructure components.
• Cloud development skills on IBM Cloud - DMZR.
• Knowledge of KESMA.
• Knowledge of Elastic Search.

Business and Agile Experience:

• Knowledge of agile methodology is mandatory.

Language Requirements:

• English is mandatory and is used for meetings and all documentation.
• French is the spoken language on the floor.
• Dutch is nice to have.

Soft Skills:

• Excellent analytical skills.
• Strong team spirit.
• Efficient communication skills.
• Ambition towards achieving the squad’s targets.
• Strong alignment with agile values: focused, committed, open, respectful and courageous.
• Ability to promote continuous improvement, including market developments and working methods, to improve software and hardware delivery speed and operational quality.

Why Join Keystone Solutions:

This consultancy mission combines client-site impact with the broader opportunities of a career at Keystone Solutions. You will tackle dynamic projects and diverse challenges across client environments, creating a turbo-charged learning experience that broadens both your technical and professional expertise. Keystone Solutions supports skyrocketing ambition through continuous development and career growth within its consultancy framework. Being a K-Stone means bringing our core values to every engagement while acting as a trusted Keystone Solutions consultant in the client environment.