About the Role

Experience: 8 + Yrs

Work location HQ in Brussels – at least 3 days per week from office

As a Senior Developer in the Lockers domain, you will play a key role in designing, building, and maintaining the software systems that power our parcel locker network. These systems connect physical lockers with digital platforms, ensuring reliable, secure, and scalable delivery and pickup experiences for customers.

You will work at the intersection of backend services, frontend applications, and IoT integrations, contributing to a modern, event-driven architecture that supports real-time communication with thousands of distributed devices.

Key Responsibilities

Design, develop, and maintain scalable applications using TypeScript, Node.js (NextJS framework), and Angular
Build and optimize backend services and APIs that interact with locker hardware and central systems
Develop responsive and user-friendly front-end applications for internal and customer-facing tools
Integrate and manage IoT devices using protocols such as MQTT
Design and maintain PostgreSQL databases, ensuring performance, reliability, and data integrity
AWS cloud development and knowledge of its basic services
Containerized applications, minimum docker, preferably ECS
Contribute to system architecture decisions, focusing on scalability, security, and maintainability
Implement event-driven and real-time communication solutions for locker-device interactions
Collaborate with cross-functional teams (product owners, hardware engineers, operations)
Ensure high code quality through code reviews, testing, and best practices
Troubleshoot and resolve complex production issues in distributed systems

Required Skills & Experience

Strong experience with TypeScript in both frontend and backend environments
Proven expertise in Node.js for building scalable APIs and services
Solid experience with Angular for modern web application development
Hands-on experience with PostgreSQL (data modeling, performance tuning)
Experience working with IoT systems and device communication
Practical knowledge of messaging protocols, especially MQTT
Familiarity with microservices and event-driven architectures
Experience with RESTful APIs and real-time communication patterns
Strong understanding of software design principles and best practices
Experience with CI/CD pipelines and DevOps practices is a plus

Nice to Have

Experience with cloud platforms (AWS, Azure, or GCP)
Knowledge of containerization (Docker, Kubernetes)
Experience with monitoring and observability tools
Familiarity with security best practices in IoT environments

Soft Skills

Strong problem-solving and analytical thinking
Dare to go against the grain to do what’s best for the company
Ability to work independently and take ownership
Excellent communication and collaboration skills
Mentoring mindset towards junior developers

Market Cloud Ltd

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Senior Developer – Lockers Domain