Energy
Fullstack Developer · Ongoing
Enterprise platform for tracking and resolving data inconsistencies across grid operator systems.
ReactTypeScriptViteTanStack Query+17 more
Ruben Karlsson
Full stack developer and IT consultant in Berlin.
7+ years building B2B platforms, real-time dashboards, and accessible web and mobile apps. I write TypeScript and Python, build interfaces with React, React Native and Angular, services with NestJS and FastAPI, and deploy on Azure with Docker.
View my work
Experience
All projects delivered through Teclead Ventures GmbH, where I have worked as an IT consultant since 2019.
Showing 10 projects
Travel
Lead Frontend Developer · Ongoing
Website, mobile app and CMS for a German cruise booking provider, on one shared client library.
ReactNext.jsTypeScriptExpo+24 more
Chemical Industry
Fullstack Developer · 3 years
Process optimization and data visualization across global production sites.
AngularRxJSTypeScriptHighcharts+18 more
Energy
Fullstack Developer · 13 months
Interactive dashboard for real-time power plant data visualization.
AngularRxJSTypeScriptHighcharts+14 more
Non-Profit
Frontend Developer · ~1.5 years
Pluggable donation web component for non-profit and NGO websites.
AngularAngular MaterialRxJSTypeScript+6 more
Digital Sales
Fullstack Developer · 6 months
Monitoring dashboard for sales API transaction analysis and alerting.
ReactMaterial DatagridHighchartsTypeScript+6 more
About
I'm a full stack developer based in Berlin, working as an IT consultant at Teclead Ventures. Over the past 7 years, I've built B2B platforms, real-time dashboards, donation systems, and booking applications for clients in the chemical, energy, travel, and non-profit sectors.
My strongest tools are Angular, React, NestJS and TypeScript. Accessibility goes in while I write the component, not in a pass at the end. Screen reader support and keyboard navigation are part of the first version I hand over.
Before tech, I worked in film production in Madrid, translated books and articles across four languages, organized cultural festivals in Bavaria, and taught Spanish in Berlin schools. Ironhack's bootcamp in 2019 moved me into software.
I speak Spanish and Swedish natively, English and German at C1 level. I work in all four professionally.
- SpanishNative
- SwedishNative
- EnglishC1
- GermanC1
Berlin, Germany
Skills
TypeScriptAngularReactNestJSPostgreSQLDockerAccessibilityPython
Frontend
- AngularAdvanced
- ReactAdvanced
- TypeScriptAdvanced
- RxJSAdvanced
- Next.jsProficient
- React NativeProficient
- ExpoProficient
- NgRxAdvanced
- TanStack QueryProficient
- Tailwind CSSProficient
Backend
- NestJSAdvanced
- Node.jsAdvanced
- Express.jsAdvanced
- PythonAdvanced
- RESTAdvanced
- MicroservicesAdvanced
Database
- PostgreSQLAdvanced
- PrismaAdvanced
- TypeORMAdvanced
- MongoDBProficient
- MongooseProficient
- MySQLProficient
DevOps & Cloud
- Azure CloudAdvanced
- DockerAdvanced
- CI/CD PipelinesAdvanced
- Azure DevOpsAdvanced
- GitHub ActionsAdvanced
- VercelProficient
- EAS Build & UpdateProficient
- FirebaseProficient
- Kafka StreamsAdvanced
Testing
- JestAdvanced
- CypressAdvanced
- PlaywrightProficient
- Testing LibraryProficient
- TDDAdvanced
- Accessibility TestingAdvanced
- Code ReviewsAdvanced
Architecture
- Domain Driven DesignAdvanced
- MicroservicesAdvanced
- Nx MonorepoAdvanced
- OpenAPI CodegenProficient
- API IntegrationsProficient
Design & UX
- Responsive DesignAdvanced
- AccessibilityAdvanced
- Screen Reader OptimizationAdvanced
- Keyboard NavigationAdvanced
- FigmaAdvanced
Tools
- GitAdvanced
- BashAdvanced
- HighchartsAdvanced
- Agile / ScrumAdvanced
Let's work together.
Whether you need a full stack developer for a project or want to discuss a role, I'd like to hear from you.