MONSTREY TECHNOLOGIES
Senior Backend Developer · Freelance · Belgium
Senior Backend Developer with 15+ years of experience. I design and build the cloud infrastructure that powers industrial robotics and AI—orchestrating autonomous agents, LLMs, and frontends through scalable microservices, gRPC, and GraphQL to deliver resilient, production-grade platforms.
Currently booked — always open to talk
Soft Skills
- Communication Clear documentation, async-first collaboration, transparent status updates
- Problem-solving Breaking down complex challenges, creative solutions, pragmatic trade-offs
- Self-directed Independent work, minimal supervision, proactive about roadblocks
- Client collaboration Requirements gathering, API design reviews, technical decision documentation
- Mentoring Knowledge sharing, code reviews, guiding junior developers
Work Style
- 80% remote preferred — occasional travel/office OK
- Flexible timezone (UTC±2 currently)
- Async-first communication
- Long-term projects preferred
Tools & Environment
Languages
- Dutch native
- English fluent
- French conversational
LANGUAGES & RUNTIME
FRAMEWORKS
API & PROTOCOLS
ARCHITECTURE
SECURITY
DATABASES & MESSAGING
CLOUD & DEVOPS
AI TOOLING
Senior Backend Developer & Backup Architect
Building the cloud backend linking robots, frontends, and AI skills for an industrial robotics SaaS platform. Senior in a team of 4 backend developers, serving as backup architect. Responsible for the core API, microservices, data ingestion pipelines, and cross-service infrastructure. Architecting and implementing AI skill integration into the backend workflow, refactoring existing Python AI projects from prototypes into production-ready services. Additionally owning customer-facing API documentation and driving AI developer tooling adoption across the engineering org.
Central API layer connecting frontends, devices, and AI workloads with real-time subscriptions and inter-service communication.
Authentication and authorization handling token validation, session management, and permission resolution across the platform.
Pipeline services managing the lifecycle of device-collected data — from ingestion and cloud storage to background processing.
Event-driven services consuming real-time telemetry to trigger alerts, notifications, and outbound integrations.
Refactoring and integrating Python AI models and services into the backend architecture. Building production-ready workflows for skill execution, result handling, and inter-service communication.
Full Stack Developer
Full stack development for the Flemish government via Monstrey Technologies. Primarily frontend-focused, building Vue applications on a .NET backend. Set up authentication flows and kickstarted multiple projects, guiding them to maturity before handoff.
Built and maintained Vue.js applications for government-facing platforms, handling component architecture, state management, and UI/UX consistency across projects.
Developed and maintained .NET backend services, building APIs and business logic layers consumed by frontend clients.
Designed and implemented authentication and authorization flows, integrating identity providers and securing access across frontend and backend layers.
Worked within Azure DevOps pipelines for automated builds, testing, and deployments across staging and production environments.
Implemented BFF services using Express to tailor backend responses to frontend needs, reducing coupling between UI clients and core backend services.
R&D Software Engineer
R&D software engineering focused on Android platform development for healthcare environments. Worked on Android kernel modifications to improve network reliability of devices used indoors in healthcare facilities. Developed a new Android application for real-time alerting purposes.
Modified Android kernel networking stack to improve wireless reliability of devices operating in indoor healthcare environments.
Developed a new Android application for real-time alerting in healthcare facilities.
Pentester
Penetration testing and security assessments at PwC. Conducted black-box penetration tests, vulnerability assessments, and security audits for clients across various industries. Identified security weaknesses through systematic testing, documented findings with risk assessments, and provided remediation recommendations.
Conducted comprehensive penetration tests from an external attacker perspective, identifying vulnerabilities in network infrastructure, applications, and systems.
Performed vulnerability scanning and analysis to identify security weaknesses, assess their severity, and prioritize remediation efforts.
Conducted security audits and documented findings with detailed risk assessments and actionable remediation recommendations for clients.
- Backend Architecture & Development
- API Design (GraphQL, gRPC, REST)
- Microservice Design & Implementation
- Data Pipeline & Event-Driven Systems
- AI Tooling & LLM Integration
- DevOps & Containerization