Back End Developer

MEET AVIOBOOK ✈️ AvioBook is a global leader in providing cutting-edge software and a one-off unique hardware solution for the aviation industry. We began by revolutionising the Electronic Flight Bag (EFB) market with a product designed by pilots for pilots and their flight crews. Today, we continue to innovate, creating smart, easy-to-use solutions that enhance airline efficiency and streamline workflows for flight crews and operational teams. In an industry that’s constantly evolving, we prioritise user-centric design and collaboration across departments. AvioBook exists thanks to passionate people, excited to solve complex challenges within a dynamic team. For our Headquarters in Hasselt we are looking for an experienced Backend Software Engineer (NodeJS, NestJS). We’re looking for an enthusiastic and dedicated Backend Software Engineer who enjoys working in a great team and an exciting industry. Every flight is a coordinated effort. Pilots, cabin crew, the OCC and other stakeholders need to stay connected in real time—even on mobile devices with limited connectivity at 35,000 feet. Our software is used every flight day, so reliability matters. Your role As a Backend Software Engineer, you’ll work on AVIOBOOK Connect, our fast-growing chat application that keeps aviation teams connected. You’ll focus on the backend services and APIs that power Connect, tackling technical challenges such as:
• Offline behaviour and limited connectivity
• Data synchronisation
• Real-time communication and state
• Reliable and scalable backend services
• Secure, production-ready software You’ll own features end-to-end, from refinement to production. You remain responsible for how your services and APIs perform when real crews use them. How you’ll work You’ll collaborate closely with Product Owners, Designers, Engineers and other stakeholders to turn requirements into high-quality software. You’ll contribute to system architecture, make technical decisions and deliver tangible value in an Agile environment. You’ll also take an active role in the operational side of your features, from identifying risks and performance bottlenecks to troubleshooting production issues using tools such as logs, distributed tracing and APM. YOU
• Builds high-quality, secure and well-tested software
• Has strong NodeJS, NestJS & TypeScript backend experience
• Is experienced in building REST APIs, WebSockets and backend services
• Takes end-to-end ownership of features from refinement to production
• Understands security, testing, performance and reliability
• Applies security best practices, including OWASP and GDPR
• Contributes to architecture and technical decisions
• Proactively solves problems, identifies risks and improves processes
• Is comfortable troubleshooting production issues and operational challenges
• Communicates well and enjoys collaboration, mentoring and knowledge sharing
• Is eager to learn, grow and leverage AI tooling
• Is organized, flexible, positive and result-driven
• Wants to contribute to a fun, motivated and growing team OUR TECH STACK
• TypeScript, NodeJS & NestJS
• MongoDB & RabbitMQ
• React & React Native
• Jest, Playwright & Maestro
• AWS
• NewRelic & Coralogix
• Claude Code & Codex NICE TO HAVE
• experience with offline-first or real-time systems
• experience with event-driven systems
• knowledge of Domain-Driven Design
• an interest in cloud infrastructure and Infrastructure as Code
• an interest in aviation

WE OFFER
YOU
• An in-house job with a contract for an indefinite period (no consultancy)
• A great place to work with an enthusiastic team & strong team spirit
• A challenging and dynamic scale-up environment
• A varied job that offers personal development opportunities and continuous training in the field
• A competitive salary package
• Meal checks
• Group insurance
• Health insurance
• A laptop
• A company car and charging card LOCATION Herkenrodesingel 8D bus 3.01, Hasselt, Limburg, Belgium