Job Specifications
End-to-End Engineer / Fullstack Developer
Location: Brussels, Belgium (Hybrid -- 50% onsite)
Industry: Aviation & Air Traffic Management
Contract Type: Freelance / Long-term assignment
About The Role
We are seeking an experienced End-to-End Engineer / Fullstack Developer to work on large-scale, mission-critical systems within the aviation and air traffic management sector. You will be responsible for delivering robust, high-performance full-stack solutions with a strong emphasis on backend development, frontend architecture, and DevOps best practices.
Key Responsibilities
Software Development: Design and build scalable Java applications (Quarkus/Spring), ensuring maintainability and efficiency.
Database Optimization: Architect and optimize MongoDB and PostgreSQL schemas, queries, and indexing strategies for performance and scalability.
Microservices & Messaging: Develop and scale microservices using Kafka, with ELK stack integration for monitoring and troubleshooting.
Performance Engineering: Identify and resolve performance bottlenecks at code and infrastructure levels.
DevOps: Manage CI/CD pipelines using Jenkins, SonarQube, Nexus, Docker, and Kubernetes.
Security: Implement secure coding practices and ensure compliance with security standards.
Frontend Development: Develop modern and responsive interfaces using React (with TypeScript), Ant Design, Webpack, and testing with Jest and React Testing Library.
Ownership: Drive solutions end-to-end with minimal supervision, including codebase takeover and delivery.
Collaboration: Work closely with product owners, architects, and other stakeholders.
Mentorship: Support and guide junior developers.
Required Skills & Experience
Strong Java expertise with Quarkus and/or Spring.
Proficiency in MongoDB, PostgreSQL, Kafka, and ELK stack.
Proven DevOps skills with Kubernetes, Docker, Jenkins, SonarQube, and Nexus.
Solid understanding of performance optimization and profiling.
Security best practices implementation.
Hands-on frontend experience with React, TypeScript, and modern JS.
Familiarity with MinIO storage, JWT, and RBAC concepts.
Agile methodology experience.
Excellent communication and problem-solving skills.
Proactive and independent work ethic.
Additional Information
Start Date: Immediate or flexible
Location: Brussels, Belgium -- 50% onsite
Duration: Long-term assignment
Meetings: Integration review after 1 month, quarterly progress reviews, bi-annual evaluations
About the Company
Sparagus is a young and dynamic company specialized in IT Recruitment and based in Brussels.
We are mainly active in the banking and insurance sector. We provide an expertise in the following areas:
* Development/Software engineers /Analyst Programmer
* Testing and QA
* Functional and Business analysis
* Projects and Programs Manager, Change Manager, PMO.
* ICT Architects
* ERP Specialists (SAP, Dynamics, JD Edwards, Oracle, …)
* C-Level professionals
*...
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