About the role
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 Sparagus
Sparagus is a premier consulting firm based in Brussels, France, Luxembourg & Morocco. Specializing in providing top-tier IT, engineering, and operations expertise. We offer tailored recruitment and consulting services to meet the unique needs of our clients. DUN & BRADSTREET
Our team comprises highly skilled professionals dedicated to delivering innovative solutions that drive business success. We pride ourselves on our deep understanding of the industries we serve and our commitment to excellence.
At Sparagus, we are committed to connecting businesses with the right talent and providing strategic consulting services that foster growth and innovation.
For more information about our services and career opportunities, please visit our website at www.sparagus.be.
About the role
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 Sparagus
Sparagus is a premier consulting firm based in Brussels, France, Luxembourg & Morocco. Specializing in providing top-tier IT, engineering, and operations expertise. We offer tailored recruitment and consulting services to meet the unique needs of our clients. DUN & BRADSTREET
Our team comprises highly skilled professionals dedicated to delivering innovative solutions that drive business success. We pride ourselves on our deep understanding of the industries we serve and our commitment to excellence.
At Sparagus, we are committed to connecting businesses with the right talent and providing strategic consulting services that foster growth and innovation.
For more information about our services and career opportunities, please visit our website at www.sparagus.be.