
Full Stack Engineer
On site
Brussels, Belgium
Freelance
17-03-2025
Job Specifications
#HumanizingTechnology
ABOUT SEIDOR
At SEIDOR, we help drive the transformation and competitiveness of our clients through technology and innovation, always focusing on the value of the human side and being committed to talent and sustainable development.
We are a diverse and inclusive organization that believes in equal opportunities. We already have over 8,000 professionals in 45 countries across Europe, Latin America, the United States, the Middle East, Africa, and Asia.
Here, you can develop and grow both professionally and personally from day one, with the support of a great team that shares human values.
We carry out projects with a positive impact at both national and international levels, serving clients from different industries and collaborating closely with the leading technology providers (such as SAP, Microsoft, Salesforce, IBM, Google, AWS, Cisco, Adobe). We are one of the most recognized and awarded companies by our partners.
We are committed to sustainability and promote ESG (Environmental, Social, and Governance) criteria to achieve sustainable development. We have reduced and offset our carbon footprint, becoming a net-zero company.
At SEIDOR, we believe that to address the challenges of the digital world and the new hurdles that arise, we must have the best allies, market-leading technologies, and, above all, the best people.
Will you join us in humanizing technology?
ABOUT THE JOB
We are a large company with a start-up spirit. We organize ourselves into expert knowledge Units that collaborate with each other.
That's why we are looking for curious individuals who are motivated by challenges and eager to grow personally and professionally, to join our team and make a positive impact on the world through technology.
ARE YOU UP FOR THE CHALLENGE?
We want you to be a part of our team, from Brussels, as a Full-stack developer.
WHAT WILL YOU DO IN YOUR DAY-TO-DAY?
• Development, maintenance and evolutive changes of Java Spring( Kafka, DB Orcle) applications
• Ensure security of applications.
• Read and understand BPMN and UML models
• Read and understand functional requirements
• Implement existing functional requirements
• Apply implementation best practices
• Review, test and debug existing code
• Prepare JUnit Test scenarios and cases
• Implement JUnit Test scenarios and cases
• Configuration and management of infrastructure
• Document different development phases
• Assistance to other team members in development, testing, configuration, documentation, deployment, evaluation and reporting
• Implement existing functional requirements using eUI framework
• Prepare UI Test scenarios and cases
• Implement UI Test scenarios and cases
• Implement core business logic.
• Creation of servers and databases for functionality.
• Design and implementation of data storage solutions.
• Understanding and implementation of security and data protection.
• Optimization of the application for maximum speed and scalability.
• Taking lead on projects, as needed.
• Maintenance of code integrity and organisation.
WHAT DO WE EXPECT FROM YOU?
Expertise in developing applications with Java Spring & API, Kafka, DB Oracle
Good knowledge of architecture best practices and patterns.
Good knowledge of microservices and architecture in the cloud.
Good knowledge of applications design.
Good knowledge of modelling tools and standards (BPMN).
Good knowledge of Enterprise Architecture.
Good knowledge of Relational DBMS.
Good knowledge of business process analysis, modelling and automation with Camunda.
Knowledge of interoperability technology (web services, message oriented middleware, service oriented bus, event architecture).
Expertise in Angular 14+, Javascript and front-end architecture and development
Ability to cope with fast changing technologies used in application architecture and design and cloud architecture integration
Experience with middleware integration platforms. Experience with micro-services, macro-services and event-management based architectures
Expertise in using Java Spring & API
Kafka Message Broker
Relational DB Oracle
Elastic DB
Expertise in Continuous Integration and Deployment
o Working experience with the following tools: GitLab, JIRA, Confluence, Bamboo, Nexus, Crucible, Jenkins and Sonar.
o Modern DevSecOps Experience with Docker and Kubernetes is a plus.
Ability to understand, speak and write English (C1 level) , French (C1) will be an advantage.
CERTIFICATIONS & STANDARDS:
The following certificates & standards are required for the performance of tasks:
• Project Management Professional (PMP)
Optional:
• Any Cloud certification
WHAT WILL YOU FIND AT SEIDOR?
A diverse team. We respect the differences that make us more human.
Companionship. We work as a team and learn from each other.
Flexibility and work-life balance. Remote working is in our DNA. We promote flexible working hours and offer shorter working day every Friday, as well as in the months of July and August.
Continuous learning. Language courses, technical training, certifications, and more.
Personalized career development, allowing you to decide where you want to go.
Autonomy and the opportunity to suggest and promote new opportunities.
Flexible compensation program. Childcare vouchers, restaurant benefits, transportation, and health insurance.
Exclusive discounts and special conditions on technology, leisure, travel, and more.
You can be part of charitable and environmentally related initiatives.
If you have international interests, we are present in 45 countries.
Join our team and help us humanize the world through technology!
About the Company
At SEIDOR we help drive the transformation and competitiveness of our clients through technology and innovation, always focusing on the human value and prioritizing talents and sustainable development. We are a diverse and inclusive organization that champions in equal opportunities, with over 9,000 professionals across 45 countries in Europe, Latin America, the United States, the Middle East, Africa, and Asia. From day one, you will have the opportunity to grow both professionally and personally, supported by a dedicat... Know more
Related Jobs


- Company Name
- Insight International (UK) Ltd.
- Job Title
- Fullstack Developer
- Job Description
- Job Description: We are looking for a Senior Full Stack Developer with over 10 years of experience to join our team in Beerse, Belgium. The ideal candidate will possess expertise in backend technologies such as Java and Spring Boot, along with front-end proficiency in React.js. This role requires a collaborative spirit and a strong commitment to delivering high-quality software solutions. Key Responsibilities: Design, develop, and maintain scalable web applications using Java, Spring Boot, and React.js. Collaborate with product managers, designers, and other developers to create seamless user experiences. Optimize applications for maximum performance and scalability. Write high-quality, maintainable, and efficient code. Conduct code reviews and mentor junior developers. Troubleshoot and resolve issues in a timely manner. Stay informed about emerging technologies and best practices in software development. Qualifications: Bachelor’s degree in Computer Science, Engineering, or a related field. 10+ years of professional experience in full stack development. Proficiency in backend technologies: Java and Spring Boot. Strong front-end experience with React.js. Solid understanding of database systems (SQL and NoSQL). Familiarity with RESTful APIs and microservices architecture. Experience with version control systems (e.g., Git). Excellent analytical and problem-solving skills. Strong communication skills and the ability to work collaboratively. Fluent in English; knowledge of Dutch or French is a plus. Work Arrangement: This position requires a minimum of 3 days per week in the office.


- Company Name
- CHRLY Belgium
- Job Title
- Dynamics Developer
- Job Description
- For one of our customers in Anderlecht, Fujitsu is looking for a Dynamic 365 Developer Start: ASAP Po until 31/12/2026 Experienced Microsoft Dynamics profile that will help design and implement an internal project. Candidate must have extensive experience in Microsoft Dynamics 365 and a strong technical background. Responsibilities:Collaborate with stakeholders to align on objectives, scope, and ensure technical feasibility. Configure, customize, and test Microsoft Dynamics 365 applications to meet business needs. Develop workflows, integrations, and reports to demonstrate system capabilities. Provide technical guidance and recommendations on best practices. Identify potential challenges and propose solutions. Document findings and implementation. Required Skills & Qualifications:3+ years working with Microsoft Dynamics 365. Strong understanding of Dynamics 365 customization, Power Platform, workflows, integrations, and security. Experience implementing automated testing platforms and unit tests Proficient understanding of code versioning tools such as GIT Proven experience with the Atlassian suite Experience with Agile methodology Experience with popular web application frameworks Ability to valuate feasibility and effectiveness of solutions. Strong verbal and written communication, ability to work with both technical and non-technical stakeholders. Other technologies in back-end development background is a plus


- Company Name
- Kevin Edward
- Job Title
- Senior Genesys Software Engineer
- Job Description
- Job Title: Senior Genesys Software Engineer (min. 7 years of experience) Employment Type: Contract Workplace Type: Hybrid/ Brussels Job Description: Building Genesys IVR models and self-services Building integrations between our VCC and other Telenet landscape components (Pege, AI models, data models, etc.) Building dashboards within the Genesys VCC framework Mandatory Experience: In-depth understanding of SIP telephony infrastructure and Genesys Engage interaction routing Knowledge of Linux OS, PostgreSQL & Oracle DBMS At least basic knowledge of Genesys Infomart, Genesys Outbound Campaigns, Genesys Workforce Management, and Genesys handling of non-voice interactions At least basic knowledge of Tomcat web application server Experience with analyzing Genesys log files (SIPServer, URS, ORS, MediaServer) Good understanding of VXML and SCXML Experience with developing complex IVR/Routing scripts using Genesys Composer, developing Genesys Pulse widgets for real-time reporting, and developing custom applications using Genesys Platform SDK Experience with Java or C#, JSP, JavaScript/ECMAScript


- Company Name
- EMW
- Job Title
- 2025-0072 Network Analyst Support for Project and O&M (NS) - MON 31 Mar
- Job Description
- Deadline Date: Monday 31 March 2025 Requirement: Provision of Network Analyst support for Project and O&M (Operations & Maintenance) Location: Brussels, BE Full Time On-Site: Yes Time On-Site: 100% Period of Performance: 2025 BASE: 1 July 2025 - 31 December 2025 with possibility to exercise the following options (each option = 6 months): 2026 Option 1: 1st January 2026 until 30th June 2026 2026 Option 2: 1st July 2026 until 31st December 2026 2027 Option 1: 1st January 2027 until 30th June 2027 2027 Option 2: 1st July 2027 until 31st December 2027 Required Security Clearance: NATO SECRET 1 INTRODUCTION To strengthen the Alliance through connecting its forces, the NCI Agency delivers secure, coherent, cost effective and interoperable communications and information systems in support of consultation, command & control and enabling intelligence, surveillance and reconnaissance capabilities, for NATO, where and when required. It includes IT support to the Alliances' business processes (to include provision of IT shared services) to the NATO HQ, the Command Structure and NATO Agencies. The Directorate of CIS Support Units (DCSU) is responsible to manage, deliver and maintain assigned Communications and Information System (CIS) products and services for the Agency's customers including NATO Headquarters (NHQ), the NATO Command Structure (NCS), NATO Force Structure (NFS), Nations and internal Agency users. DCSU provides liaison, planning and coordinating functions for Alliance Missions, Operations and Exercises. Services are delivered in coordination with the Enterprise Service Operations Centre (ESOC) and Agency Service Lines/Service Centres under the Enterprise Service Delivery Model (ESDM). NCI Agency CIS Support Unit (CSU) Brussels, located in Brussels (BEL) is the primary Information, Communications and Technology (ICT) service provider for 24/7 support to the Secretary General, the International Staff (IS), the International Military Staff (IMS) and other Customers in the NATO Headquarters in Brussels. CSU Brussels enables end-to-end CIS services as it installs, operates, maintains and supports the full range of CIS capabilities during peacetime, crisis and war throughout its allocated Area of Responsibility (AOR) and as otherwise directed. The Network Management Section (NMS) supports and maintains all Local Area Network Systems (Voice and Data) at NATO HQ and is responsible for VoIP implementations, all active and passive network components of the supported networks. It is NMS who provides network infrastructure for journalists during Ministerial meetings and special events and provides support for Remote Connections to the main networks. A crucial part of the responsibility of this section is the static and mobile remote connectivity of the Secretary General. 2 OBJECTIVES The main objectives of this statement of work can be summarized as follows: The service contractor will assist the Network Management Analyst team to provide O&M support for the network environments. The focus of the workload will consist of O&M (Operations & Maintenance) support and project related work. He/she will be essential for ensuring operational resilience, promoting a collaborative work environment and mitigating the risks associated with the dependency on limited resources". The O&M support service provides dedicated assistance to the Network Analyst team, ensuring the smooth operation of all network environments. This service focuses on the resolving issues and problems, performing routine tasks that are essential for maintaining system stability, enhancing operational resilience, and ensuring the continuity of service. The project related service provides assistance to the Network Analyst, ensuring the work package deliverables for the Asset Replacement project are met. This service focuses on setup of equipment, perform mandatory security related activities, testing, staging and deployment of the equipment. 3 SCOPE OF WORK Under the direction of the Section Head, the resource will provide services related to the following main activities: Provide first and second line network support to the Service Centre; Perform diagnoses and resolve network incidents and problems; Install, replace, modify and configure network systems; Monitor network systems and proactively report and resolve potential network issues; Create and maintain Standard Operating Procedures to document network systems; Operate Cisco Identity Services Engine systems to support client installations, moves and changes; Provide support and assistance during preparation and security assessments; Take initiative to investigate, diagnose and resolve issues in a systematic approach; Ensure that Routing, Switching and other network elements are backed up; Propose and implement network improvements; Liaise and collaborate internally, with the NCIA Service Lines and external providers for fault rectification and network improvement activities; Provide input to and assist with on-site security surveys, validations and acceptance testing of network infrastructure systems; Work on own initiative with limited supervision; Assist his/her superiors and recommend solutions; Periodically provide on demand support outside of business hours; Perform other duties as may be required It is expected that ONE resource is providing the above services. The contractor will provide the service on-site. The contractor will provide services during NATO HQ working hours. The measurement of execution for this service is sprints, with each sprint planned for a duration of 1 week. The content and scope of each sprint will be agreed in writing, during the sprint-planning meeting, based on the activities mentioned above. 4 DELIVERABLES AND PAYMENT MILESTONES Subject on actual requirements, contractor performance and available funding, the Purchaser reserves the right to exercise optional sprints for 2025, at a later time, within the same scope and cost. The payment shall be dependent upon successful acceptance of the Delivery Acceptance Sheet (DAS) - (Annex B) including the EBA Receipt number. Invoices shall be accompanied with a DAS, signed by the Contractor and Purchaser's authority. The following deliverables are expected from the service on this statement of work: 2025 BASE: 01 July 2025 to 31 December 2025: Deliverable: 25 sprints for Provision of Network Analyst Support (Number of sprints is calculated considering a starting date 1 JULY 2025. This will be adjusted based on actual starting date.) Payment Milestones: Upon completion of each fourth sprint and at the end of the service. Completion of each milestone shall be accompanied documented in Delivery Acceptance Sheet (DAS) - (Annex B), signed for acceptance by the Purchaser's authorized point of contact and the Contractor 2026 OPTION 1: 01 January 2026 to 30 June 2026: Deliverable: 25 sprints for Provision of Network Analyst Support (Number of sprints is calcula...