React · Vue · TypeScript
12+ years of React, 10+ years of TypeScript, 6+ years of Vue and Next.js – most recently for BakerMcKenzie, Sparkasse, E.ON, Rameder (Vue 3 / Nuxt 3) and Liebherr.
Senior Fullstack Developer – Frontend Focus
Tillmann David
Around 20 years of software development with a clear focus on the frontend: React, Vue and TypeScript, complemented by Node.js, Java, REST APIs and architecture – from concept to production.
12+years of React
10+years of TypeScript
8+years as team lead & tech lead
20+well-known clients
Satisfied clients include
- E.ON
- Sparkasse
- BakerMcKenzie
- Liebherr
- Porsche
- Audi
- Mazda
- Daimler
- Deutsche Bank
- Jungheinrich
- Vergölst
- LBS
- HVB
- Rameder
- Tridonic
- Huawei
- Royal Canin
- Die Zeit
About me
Moin Moin 👋
I'm Tillmann, 41, a Senior Fullstack Developer from Heidelberg – with a clear focus on the frontend and self-employed since 2022.
I use AI tools such as Claude Code, Codex and GitHub Copilot every day, from code generation to code review – without compromising on quality, structure or maintainability.
As a long-standing team lead and tech lead, I make technical decisions, set standards and work closely with design, UX, backend and clients – in German and English.
- Way of working
- Remote and on-site, also on several projects in parallel
- Languages
- German (native), English (fluent)
- Awards
- iF Design Award, Digital Media Concept, Autobild Autospot Award
Focus areas
Where I add the most value – with the projects in which I've done it.
Frontend architecture
Architecture planning (Mazda, Tridonic, Bimondo), design systems with Storybook (Liebherr, Sparkasse, Mazda), headless/MACH, performance and coding guidelines.
Accessibility & quality
WCAG- and BFSG-compliant interfaces (Sparkasse, Mazda, Liebherr), unit and E2E tests with Jest, Cypress and Playwright.
Node.js, Java & backend
Express services and middleware, Java (Spring), ASP.NET Core with CQRS (BakerMcKenzie) and Python/FastAPI (E.ON).
AI integration
AI platform for document knowledge (E.ON), document analysis with Azure OpenAI (BakerMcKenzie), AI chatbot frontend (Messe Stuttgart).
Technical leadership
Team lead 2014 – 2022 (diva-e, UDG / PIA Group), tech lead at Mazda and Vergölst, architect for the Deutsche Bank intranet. Code reviews, coaching, onboarding.
CI/CD & cloud
Planning and implementation of CI/CD (Mazda), GitLab CI, Jenkins, Azure DevOps, Docker; Azure and AWS.
Enterprise & finance
Deutsche Bank, Sparkasse, LBS, HVB, BakerMcKenzie, E.ON – with an eye on data protection and regulatory requirements.
Projects
A selection from recent years. The full list is in my CV.
Legal Matter Management Platform
- Fullstack features with React, TypeScript and ASP.NET Core in a CQRS-based clean architecture
- AI-powered document analysis and classification with Azure OpenAI
- Up to 74 % lower latency through optimised EF Core queries and indexes
- React
- TypeScript
- TanStack Query
- ASP.NET Core
- Azure OpenAI
Low-Code Application Platform
- Frontend features for the model-driven creation of business applications
- Building up test coverage, including E2E tests for key user flows
- React
- Next.js
- GraphQL
- Playwright
- Java
Financial Health Check
- Accessible interfaces following WCAG in a secure banking environment
- Helped shape the data model, microservices and authentication
- React
- TypeScript
- Storybook
- Node.js
- WCAG
Internal AI Platform
- Concept for a headless AI platform that makes knowledge from internal documents accessible
- REST API to the Python/FastAPI backend, OAuth2 with Azure Entra ID, white-label for tenants
- React
- TypeScript
- Tailwind
- D3
- FastAPI
Lead Management System
- Headless lead management system including a marketplace
- Integration into OSPlus neo, the internal Sparkasse application
- React
- Next.js
- MUI
- Zod
- Playwright
Migration to VTEX E-Commerce
- Tech lead: architecture planning, CI/CD, checkout and handover
- Accessibility following WCAG throughout development
- React
- TypeScript
- GraphQL
- MACH
- GitLab CI
Show more projects
- Q2.2024 – Q1.2025 Further development of the online shop · Rameder Vue 3, Nuxt 3
- Q2.2024 AI chatbot · Messe Stuttgart React, Node.js, WebSockets
- Q3.2023 – Q2.2024 Relaunch of liebherr.de · Liebherr React, Next.js, Storybook
- Q2.2023 – Q4.2024 B2C & B2B shop on AEM 6 · Vergölst React, MobX, Leaflet
- Q1.2021 – Q4.2023 DBNetwork intranet · Deutsche Bank Architect & tech lead
- 2014 – 2017 Porsche 911 Exclusive web special · Porsche Control of robotic arms, award-winning
- 2011 – 2014 Connectivity platform & in-app ads · Audi WebSockets, iPad gyroscope
Career history
Detailed CV (PDF)- since 2022
Senior Fullstack Developer
Self-employed · frontend focus
- 2017 – 2022
Expert Software Developer & Team Lead
diva-e
- 2014 – 2017
Senior Web Developer & Team Lead
UDG / PIA Group
- 2011 – 2014
Senior Web Developer
FLOW4
- 2006 – 2011
Web Developer
NETRADA / Arvato Bertelsmann
Technical skills
The number shows years of project experience.
Frontend
- React 12+
- TypeScript 10+
- JavaScript 20+
- Next.js 6+
- Vue 6+
- Nuxt 5+
- HTML & CSS 20+
- Tailwind 6+
- Web Components 5+
- Storybook 5+
- Redux / MobX
Backend & APIs
- Node.js 10+
- Express 8+
- REST APIs 15+
- GraphQL 2+
- PHP 10+
- Java 5+
- Python 2+
- C# / ASP.NET Core
- MongoDB 2+
Quality & accessibility
- Jest 6+
- Cypress 4+
- Playwright 3+
- WCAG 5+
- BFSG
DevOps & cloud
- CI/CD 15+
- GitLab 6+
- Jenkins 6+
- Docker 4+
- Azure 2+
- AWS
- Linux 6+
AI
- AI integration 2+
- Azure OpenAI
- Claude Code
- Codex
- GitHub Copilot
Leadership & methods
- Team lead / tech lead 8+
- Agile / Scrum 10+
- Figma 4+
Contact
Let's talk about your project.
I look forward to hearing from you – whether it's new development, further development or architecture.
- Phone
- LocationHeidelberg, Germany · remote & on-site