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Senior Frontend Developer for Demanding Agency Projects Concrete Solutions for Your Pain Points

Agencies

I solve real agency problems: capacity bottlenecks, performance optimization, AI integration. 18+ years of experience in UI, UX and frontend development

Swamped? I've Got Your Back.

Committed to a project but your team is stretched thin? Deadline looming while your devs are knee-deep in other work?

I deliver:

  • White-label frontend capacity on demand
  • Quick integration without onboarding overhead
  • Reliable senior quality you can put your name on

Let's talk about your project

I work selectively with 3-4 agencies at a time to guarantee top-notch quality.

Check availability

Performance Issues? I'll Sort It Out.

PageSpeed score in the red? Client complaining about a sluggish website?

My solution:

  • Performance audit with actionable fixes
  • Core Web Vitals optimization (measurable results)
  • Sustainable architecture consulting

AI Integration: The Right Solution, Not the Loudest Hype

Clients asking about AI, but you don't know where to start? No in-house expertise? Unsure whether to go cloud API or self-hosted?

I advise pragmatically:

  • Cloud APIs (OpenAI, Anthropic) → quick start, best models for complex tasks
  • Local models (Ollama, LM Studio) → privacy, cost control at scale, GDPR-compliant
  • Hybrid approaches → the best of both worlds
  • Prompt engineering & RAG systems for customer support

What Premium Clients Say

  • Natalie Feil
    Founder

    "As founders of Dentale Fachabrechnung, we received not only highly professional consulting, ideas and implementation, but also efficient and smooth communication throughout the process. Our project was completed on time and with excellent value for money."
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  • Eric Wicker
    Senior User Experience Consultant

    "Jan possesses comprehensive expertise in WordPress, but also gladly brings in knowledge from other areas, such as UX/UI. These are not the only reasons why regular collaboration with him is such a pleasure."
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  • Jan Weitendorf von Hacht
    CEO

    "Jan Raap has supported us from the beginning in the conception and implementation of our requirements regarding our web presence. We wanted a WordPress implementation to be able to optimally use it with our own plugins, and we trust his expertise when it comes to SEO optimization and usability."
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All testimonials

Other Problems I Solve

Bridging the Design-Dev Gap

Designer delivers Figma, but questions or friction arise during development?

  • Design review BEFORE development kicks off
  • Actionable component architecture
  • Accessibility baked in from the start

Accessibility Compliance

Client requires accessible implementation, but your team lacks experience?

  • A11y review focused on practical WCAG essentials
  • Semantic HTML, clean structure & clear interaction patterns
  • Accessible components & sensible defaults right in the code
  • Support with contrast, keyboard navigation & form usability

Legacy Modernization

Client project running on old WordPress with jQuery spaghetti?

  • Step-by-step modernization (no big bang)
  • WordPress update strategies
  • Vue/Nuxt integration into existing systems
  • Clear migration paths for complex legacy projects — without downtime in production

Framework Expertise

Client wants a modern Vue/Nuxt solution, but you're primarily a WordPress shop?

  • White-label development for Vue/Nuxt
  • Collaborative support as part of your team
  • Seamless integration into your existing agency workflows

My Role in Your Agency

Senior Frontend Expertise

  • WordPress for agencies and mid-sized businesses
  • Vue.js/Nuxt modern, maintainable architectures
  • Performance optimization for Core Web Vitals
  • Accessibility considered from day one
  • Code reviews for your internal team

Strategic UI Competence

  • Design system development
  • Component libraries
  • Design systems that stay consistent across code and design
  • Mobile-first without cutting corners

White Label Service

  • Represent your agency professionally
  • Handle technical client conversations
  • Complete discretion
  • Seamless integration into your processes

Selected Projects

  • SEA ME & zerooo Technical Implementation of a Digital Reusable Packaging System

    Read

  • comdirect bank AG UX/UI Design & Interactive Prototypes for Digital Banking

    Read

  • W1-Media GmbH WordPress Platform for Distinguished Publishing Houses

    Read
All references

Technology Stack

Frontend Development

  • Vue.js
  • Nuxt
  • Vanilla CSS + Javascript/TypeScript
  • Pico CSS
  • Tailwind (when needed)

Headless CMS

  • WordPress
  • Strapi
  • Directus
  • Experience with JTL

Standards & Testing

  • WCAG 2.1 AA
  • Core Web Vitals
  • Lighthouse CI

AI Integration

  • Cloud APIs (Anthropic Claude, Mistral, OpenAI)
  • Local models (Ollama, LM Studio)
  • RAG systems & vector databases
  • Prompt engineering
  • MCP (Model Context Protocol)

Working Together

Project Partnership

Expertise on demand
For defined projects with a clear scope

Sprint Integration

Reinforcement for critical phases
Minimum 5 days for optimal results

Strategic Retainer

Ongoing availability
For agencies with regular needs

Pricing on request — depending on project complexity and duration

FAQ About Working Together

Let's talk about your specific problem

I work selectively with 3-4 agencies at a time to guarantee top-notch quality.

Check availability