Jonas Herrmannsdörfer
Key Facts
- 8+ years of experience
- Developer Success Engineer at Vercel
- Speaker at international conferences
- React.js Trainer at workshops.de
- Bachelor's thesis: Scaffolding React.js Applications based on the OpenAPI specification
Skills
JavaScript/TypeScript
React.js, Next.js, Node.js
React Tooling
React Router, Apollo Client, TanStack Query
CSS Frameworks
TailwindCSS, shadcn/ui
Testing
Playwright, Vitest, React Testing Library
Miscellaneous
Docker, git, pm2, Gitlab, Github, Nvim
Project Management
Agile & Lean Methodology, Scrum, Kanban
German
Native language
English
Fluent (year abroad in Ireland)
Projects
9 months
06.2025 - Present
Germany
Developer Success Engineer
Vercel
- Developer Success Engineer at Vercel
- Focus on Next.js and React.js developer experience
Technologies: Next.js, React.js, TypeScript
5 months
01.2025 - 06.2025
Stuttgart
Senior Software Engineer (Freelance)
Schoolsuite (formerly TK-Schulsoftware) GmbH & Co. KG
- Web application & native app for teachers and students
- Performance consulting
Technologies: React.js, TypeScript, GraphQL
2 years 6 months
09.2023 - Present
Berlin
React.js Trainer (Freelance)
workshops.de
- Conducting React.js and TypeScript training
- Conducting HTML & CSS training
Technologies: React.js, TypeScript
1 year 3 months
09.2023 - 12.2024
Göttingen
Senior Software Engineer (Freelance)
PACETEQ GmbH
- Real Time and Replay application for electric boat racing
- Planning & development of a Next.js architecture from scratch
- Completion of the MVP within 5 weeks
Technologies: Next.js, Fastify, Go, React.js, TypeScript, TailwindCSS, GraphQL, Leaflet, Playwright
1 year 5 months
12.2022 - 05.2024
Göttingen
Senior Software Engineer (Freelance)
PACETEQ GmbH
- Data Management Platform for motorsport
- Performance optimization: average load times reduced by 50%
- Redesign of the frontend architecture
Technologies: Next.js, React.js, Express, TypeScript, TailwindCSS, GraphQL, Playwright
1 year 2 months
09.2021 - 11.2022
Erlangen
Senior Software Engineer (Freelance)
Fraunhofer Institute for Integrated Circuits IIS
- Subproject V2X within the program "5G-Bavaria Test Center"
- Conversion of the initial Flask implementation to Next.js within 4 weeks
- Achieved a feature-complete product within a year
Technologies: Next.js, React.js, TypeScript, TailwindCSS, Leaflet, Cypress
10 months
11.2020 - 09.2021
Würzburg
Founder & CTO
Die Psychotherapie App UG (limited liability)
- Companion tool for creating and completing psychotherapy homework
- Go to market achieved in under 3 months
- Planning and implementation of a healthtech-compliant frontend architecture
Technologies: React.js, TypeScript, TailwindCSS, Firebase, Cypress
2 months
05.2021 - 07.2021
Rottendorf
Software Engineer
Faaren GmbH
- Car subscription platform
- Conversion of the previous Laravel checkout to Nuxt.js
- TailwindCSS and Nuxt.js training
Technologies: Nuxt.js, Vue.js, TypeScript, TailwindCSS
5 months
10.2020 - 03.2021
Hamburg
Software Engineer
elbstack GmbH
- Development of a smart home app for iOS and Android
- Simplification of development processes through CLI tools
Technologies: React Native, TypeScript