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 interfaces. I write TypeScript and Python, architect with NestJS and Angular, and deploy on Azure and 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
Mission-critical platform for 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
E-Commerce
Frontend Developer · 12 months
Scalable online store platform with browsing, ordering, and checkout.
AngularRxJSTypeScriptCSS3+9 more
SaaS
Fullstack Developer · 5 months
B2B monitoring platform for real-time system performance tracking.
AngularRxJSTypeScriptCSS3+7 more
Finance
Frontend Developer · 5 months
Real-time cryptocurrency market visualization and trend analysis.
AngularRxJSNgRxTypeScript+12 more
Retail
Fullstack Developer · 4 months
Location-based retail store finder with geolocation and filtering.
ReactMaterial-UICSS3Python+5 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. I care about accessibility — not as a checkbox, but as a practice. Screen reader optimization, keyboard navigation, and inclusive design are part of how I build, not an afterthought.
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. I got into software through Ironhack's bootcamp in 2019 and never looked back.
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.