02/18/2026 updated
100 % available
Senior Frontend Developer - Clean Architecture & TypeScript Expert
Portimão, Portugal
Only remote
Master of Science International Media and ComputingAbout me
Hi, I'm Stefan Nieke, a Lead Full-Stack Engineer with over 8 years of experience architecting and building scalable, high-performance web platforms using TypeScript, Node.js, Vue.js and React.js.
JavaScript3D RenderingArchitectureD3.JsData ArchitectureData ModelingData VisualizationDatabase DesignDevOpsEngine TuningGeometryGraphic DesignUser Interface DesignPostgreSQLMathematics
Frontend Architecture & Development
Expertise in building scalable, production-grade applications using TypeScript, JavaScript and modern frameworks with clean architecture principles
Full-Stack Development
Comprehensive experience across the full technology stack including Node.js, PostgreSQL, Docker and modern deployment practices
React & Vue.js Ecosystem
Advanced proficiency in React and Vue.js frameworks with deep knowledge of component libraries and state management
API Design & Integration
Modeling and standardizing frontend-backend interfaces with REST API contracts and data model design
Data Visualization
Building reusable data visualization component libraries for rapid feature development across dashboards
3D Rendering & Graphics
Client-side 3D rendering engine development with D3.js, projection math and geometry processing
DevOps & Containerization
Docker containerization, deployment automation and production environment management
Database Design
PostgreSQL schema design, database optimization and data architecture planning
UI/UX Component Systems
Reusable UI component development with shared state boundaries and design system implementation
Experience
Professional experience5 - 10 years
Freelancer since2025
Languages
GermanNative speakerEnglishFluentPortugueseFluentSpanishGood
Project history
Built production-oriented Vue.js platform end-to-end, designed PostgreSQL schemas, implemented Node.js/Express APIs, developed Vue 3 frontend, built authentication flows and CRM integrations
Managed two engineering teams delivering AI-driven document processing solutions, provided technical direction and guided architectural decisions for complex AI solutions
Collaborated with design and product teams to translate complex market forecasting features into scalable UI components, supported delivery of production features on platform serving millions of users