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Johannes WigandtJW

Johannes Wigandt

Fullstack Web Developer | Automation & APIs

€480/day
Polch, DE
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Johannes

I am a Fullstack Developer with a focus on modern web development, API integrations, and process automation. For several years, I have been developing scalable web applications, data-driven systems, and stable interfaces for small and medium-sized businesses. My goal is to implement projects with technical soundness, efficiency, and long-term maintainability.

Technologically, I primarily work within the JavaScript and PHP ecosystems. On the frontend, I prefer working with Nuxt.js, as it allows for the creation of performant, SEO-friendly, and modern web applications. On the backend, I mainly use Laravel, which enables the rapid and secure implementation of robust API structures, authentication, background processes, and complex business logic.

Another focus of my work is the development of Directus-based headless systems. I create custom data models, advanced role and permission concepts, and individual endpoints. In combination with PostgreSQL, this results in extremely flexible and performant systems that perfectly fit modern web projects.

Furthermore, I specialize in automation, particularly with n8n, custom API services, or event-driven systems. I connect databases, third-party systems, CRM/ERP solutions, newsletter services, and internal services to reduce manual workflows, minimize errors, and accelerate business processes.

I work in a structured, documented manner and communicate clearly. For each project, I analyze requirements, develop a clean technical plan, and implement solutions that not only work but also facilitate future expansions.

If you are looking for a reliable Fullstack Developer who combines modern technologies, automates processes, and drives projects forward efficiently, I look forward to collaborating with you.
  • German

    Native or bilingual

  • English

    Conversational

  • Russian

    Native or bilingual

Can work on-site
Polch (up to 50km)

Experience

  • Anonym
    n8n Automation: Import, Analyze & Visualize LinkedIn Ads Data in Looker Studio
    DIGITAL AND IT
    November 2025 - December 2025 (1 month)
    Hamburg, Germany
    For this project, a fully automated reporting pipeline based on n8n was implemented, reliably importing, structuring, and visually analyzing LinkedIn Ads campaign data.

    🎯 Goal
    Make marketing metrics from LinkedIn Ads (e.g., clicks, impressions, costs, CTR, CPC, CPM, conversions) automatically available – without manual exports and with an up-to-date dashboard at all times.


    ⚙️ Technical Implementation
    • API connection to LinkedIn Ads
    • OAuth authentication
    • Retrieval of campaign, ad, and performance data
    • Data processing in n8n
    • Normalization & KPI calculation
    • Time-based aggregation (Day / Week / Month)
    • Persistent storage
    • Automatic storage of raw and KPI data in Google Sheets
    • Visualization & Reporting
    • Setup of an interactive dashboard in Looker Studio
    • Filter by period, campaign, ad format


    📊 Result / Added Value
    • Live reporting without manual work
    • Central data source for marketing & management
    • Clean KPI logic instead of Excel formulas
    • Scalable for additional platforms (Google Ads, Meta Ads, CRM, ERP)


    🧠 Special Features
    • GDPR-compliant processing
    • Self-hosted or cloud setup possible
    • Extensible with alerts, email reports, or BigQuery
    • Ideal for agencies, marketing teams & companies with regular campaigns
    n8n LinkedIn Ads Google Sheets Rest API External API Integration
  • intratool GmbH
    Backend Developer
    SOFTWARE PUBLISHING
    February 2024 - September 2025 (1 year and 7 months)
    • Development of a scalable system for importing files and user data from partner companies
    • Backend development for the survey module (integration into Infoboard, manual, and messaging modules)
    • Further development of the Infoboard module with channel support
    • Participation in the development of system languages and automatic content translation
    PHP Laravel MySQL/MariaDB Amazon Web Services (AWS) Automation
  • neXchance IT GmbH
    Frontend & Backend Developer
    RETAIL (SMALL BUSINESS)
    October 2019 - January 2024 (4 years and 3 months)
    • Interfaces to marketplaces like Conrad, Völkner, Refurbed, and Backmarket for product export and stock reconciliation
    • Performance optimizations in API and database structures
    • Interface development (Shopware 6, ERP system VARIO)
    • Fullstack development with Laravel, Vue.js, and Nuxt
    • Development of a back office with Vue.js/Nuxt.js (frontend) and Laravel (API backend)
    Laravel Shopware 6 PHP Vue.js MySQL/MariaDB

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