Sybren

Van Gastel

Full-Stack Mind, Backend Developer Heart

I specialize in translating complex technical challenges into efficient, maintainable backend solutions. Driven by pragmatism and a passion for optimization, I collaborate closely with teams to deliver high-impact, performant systems that drive organizational success.

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About Me

Profile Picture of Sybren Van Gastel

Age

24 years old

Current Base

Hoogstraten, Belgium

Education

Bachelor Applied Computer Science

Thomas More Kempen

Interests

🎮 Gaming 🧠 Code Challenges

Core Expertise & Stack

Languages & Frameworks

Core proficiency in enterprise-grade languages and their modern frameworks.

.NET/ASP.NET Core ABP Framework C# Python TypeScript/JavaScript ASP.NET Framework

Databases & Data

Experience across relational / NoSQL databases, in-memory caches and message brokers.

SQL Server PostgreSQL MongoDB Elasticsearch Redis EF Core Intersystems Cache RabbitMQ

Architecture & Patterns

Applying modern architectural principles for building scalable, maintainable and decoupled systems.

Microservices Domain-Driven Design CQRS Clean Architecture Mediator Dependency Injection

DevOps & Cloud

Combining automation, quality assurance, monitoring and cloud fundamentals for robust deployment pipelines.

Docker Openshift Ansible Prometheus/Grafana Automated tests CI/CD Azure

Professional Experience

December 2022 - Present

Upcore

.NET Consultant @ Digipolis

  • • Migrated legacy .NET Framework and .NET Core codebases to modern .NET, resulting in significant performance gains and enhanced maintainability.
  • • Designed and built new applications using .NET and the ABP framework, including Python microservices that leverage cutting-edge on-premise AI models via VLLM.
  • • Established and improved automated build and deployment pipelines using Docker and Ansible to ensure rapid and reliable Continuous Integration/Continuous Delivery (CI/CD).
  • • Seamlessly integrated several third-party APIs into existing applications, creating a unified and coherent data experience for users.

February 2022 - December 2022

3-it

Full-Stack Developer

  • • Led the migration of a monolithic on-premise solution to Azure Cloud, significantly optimizing system scalability and resilience.
  • • Built a comprehensive suite of .NET APIs to automate and digitize key business workflows, including client management and operational task tracking.
  • • Developed serverless integrations using Azure Functions and Service Bus to automate critical processes like email assignment, greatly enhancing operational efficiency.
  • • Completely rebuilt and modernized an outdated frontend application using Angular, delivering a robust and vastly improved user experience.

July 2020 - February 2022

Katz

Full-Stack Developer

  • • Designed and developed HR applications using Java Spring Microservices and Django for robust backend systems, and Angular for responsive front-end interfaces.
  • • Built and implemented a scalable SCSS framework to standardize the look and feel across multiple digital tools, ensuring a consistent user experience.
  • • Contributed to the digitalization of existing assessment and recruitment tools, improving their efficiency and accessibility for users.