23.11.2025 aktualisiert

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Fullstack developer | React.js | Node.js | TypeScript

Berlin, Deutschland
Berlin +25 km
Bachelor computer science
Berlin, Deutschland
Berlin +25 km
Bachelor computer science

Profilanlagen

CV_Stefan_Wille.docx

Skills

TypescriptNode.jsReact.jsMySQLPostgresqlReduxScrumFrontendBackendfullstackNestJSAI Engineering
TypeScript
JavaScript
React.js
Redux
Next.js
GraphQL
Node.js
MySQL
PostgreSQL
NestJS
Datenbankmodellierung
Claude Code
Cursor
Scrum

Website

Sprachen

DeutschMutterspracheEnglischverhandlungssicherItalienischGrundkenntnisseSpanischgut

Projekthistorie

Frontend Developer

Parloa

Internet und Informationstechnologie

250-500 Mitarbeiter

Designed and implemented server-driven UI (SDUI) package enabling backend developers to build service UIs without frontend bottlenecks. SDUI standardized UI development across engineering organization.

Environment: AI scaleup, 300+ people, $1 billion valuation. Customers: Booking.com, American Express, Decathlon, Generali, Allianz, TUI. 9-person platform team building strategic frontend technology.

Other contributions:
  1. Evaluations system
  2. GPT-5 integration
  3. Multi-agency
  4. AI agent tools preferences
  5. Component library (based on Ant Design)
Built primarily using agentic AI (Claude Code).

Technologies: TypeScript, React, Ant Design, Vite, Next.js, Claude Code, Cursor, Vitest, React Testing Library, OpenAPI, GitHub

Lead fullstack developer - seabo

Next Logistics Ventures GmbH

Transport und Logistik

10-50 Mitarbeiter


Software: TypeScript, Node.js, NestJS, MySQL, Express, TypeORM, OpenAPI, Jest, React.js, Redux, react-query, Ant Design, Jest, React Testing Library, GitLab, Jira, CI

This project was 4 years old when I joined. The code base caused severe problems for the customer.
Goals:
  1. Reduce technical debt and modernize the code base
  2. Improve quality
  3. Ship new features
Highlights:
  1. Introduced NestJS framework for the backend, replacing legacy PHP
  2. Established a quality strategy
  3. Added code generation from OpenAPI specs
  4. Introduced automated tests
  5. Designed data model
  6. Directed and coached frontend team
  7. New team consistently shipped more features than previous team
  8. Migrated the code from JavaScript to TypeScript
  9. Replaced hand built components with an industry standard component library
  10. Modernized code to use current React patterns
  11. Mentored intern

Lead frontend developer

ISV

10-50 Mitarbeiter


Technologies:
  1. TypeScript
  2. React.js
  3. Redux
  4. styled-components
  5. react-query
  6. REST
  7. OpenAPI
  8. Ant Design
  9. Jest
  10. React Testing Library
  11. HTML
  12. CSS
  13. GitLab
  14. Jira
  15. CI

Zertifikate

CSM - Certified Scrum Master

borisgloger consulting GmbH

2008

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Das original exali Berufshaftpflicht-Siegel bestätigt dem Auftraggeber, dass die betreffende Person oder Firma eine aktuell gültige branchenspezifische Berufs- bzw. Betriebshaftpflichtversicherung abgeschlossen hat.

Versichert bis: 01.07.2026

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