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Available for selected freelance projectsVerfügbar für ausgewählte Freelance-Projekte

AI Automation Engineer.KI Automation Engineer.

I build production-grade AI automations, backend systems and digital employees with Node.js, Supabase, React, Claude API and n8n.

Ich entwickle produktionsreife KI-Automationen, Backend-Systeme und digitale Mitarbeiter mit Node.js, Supabase, React, Claude API und n8n.

Start a projectProjekt anfragen → See projectsProjekte ansehen
15+Automation projectsAutomationsprojekte
Full-stackBackend · DB · Frontend
DE / ENGerman & EnglishDeutsch & Englisch
01 · Stack

I connect AI, backend logic and real business processes.

Ich verbinde KI, Backend-Logik und echte Geschäftsprozesse.

AI & Agentic Engineering

Autonomous agents, LLM orchestration, RAG, context, tool use and multimodal AI workflows.

Agentic AIMulti-Agent SystemsLLM OrchestrationAutonomous AgentsRAGPrompt EngineeringContext ManagementMemory SystemsTool Use / Function CallingConversational AIMultimodal AISemantic SearchAI Workflow DesignVibe Coding

LLM & AI APIs

Frontier-model integrations for text, voice, image, transcription, document extraction and synthetic media.

Claude APIClaude CodeOpenAI APIGemini APIElevenLabsVAPIHeyGenWhisper / STTDocument AI / OCR

Development & Orchestration

Event-driven automation, middleware, webhook systems and resilient workflow execution.

Node.jsn8n Cloud EngineMakeZapierEvent-driven ArchitectureAPI OrchestrationWebhook DesignMiddlewareETL PipelinesCron JobsRetry LogicRace ConditionsiPaaS

Backend & Database

Production-ready data layers, auth, permissions, relational schemas and API-backed products.

SupabasePostgreSQLSchema DesignData ArchitectureData NormalizationRow-Level SecurityAuth / IAMOAuth 2.0NangoServerless BackendBaaSREST API DesignReal-time Processing

Frontend & Deploy

Dashboards, operator tools, SaaS interfaces and deployments used in daily operations.

React.jsSPA DevelopmentDashboard DevelopmentFull-StackHTMLCSSJavaScriptTypeScriptNext.jsRailwayGitHubCI/CDCloud DeploymentVS Code

Messaging, CRM & Sales

Omnichannel automations, CRM handovers, outbound infrastructure and lead-generation systems.

WhatsApp Business APIMeta Business APIClose CRMHubSpotGoHighLevelTelegram Bot APISmartleadInstantlyTwilioCRM IntegrationOmnichannel AutomationCold Email AutomationEmail DeliverabilityMulti-Domain SetupB2B Lead GenerationSales Automation

Lead Generation

Automated data collection, enrichment, qualification and outreach preparation.

SERPERGoogle Places APIApifyData ScrapingData EnrichmentAI-powered Outreach50+ qualified leads/day

Automation & Integration

Business-process integrations across workspaces, finance, hospitality, access and operations.

Google Apps ScriptGoogle Cloud ConsoleGoogle WorkspaceMicrosoft 365OneDriveCalDAVStripeNuki APISmoobu PMSNotionScreenshot APIIoT APIsPayment IntegrationMulti-tenant ArchitectureLexoffice APIsevDeskDATEVPMS Integration

Deployment & DevOps

Cloud deployments, versioning, API gateways and infrastructure for maintainable production systems.

RailwayGitHubGoogle Cloud PlatformServerlessAPI GatewayCloudflareDocker
02 · Selected projects

Systems I have built.

Systeme, die ich gebaut habe.

A compact selection of production-grade AI automation, data and workflow systems.

Eine kompakte Auswahl produktiver KI-, Daten- und Workflow-Systeme.

SaaS · Hospitality · Digital Employee

Digital employee for guest communication and operations

Digitaler Mitarbeiter für Gästekommunikation und operative Prozesse

Designed and built a multi-tenant SaaS platform combining guest communication, business rules, PMS integrations, invoicing, smart-lock workflows and an operator dashboard.

Konzeption und Entwicklung einer Multi-Tenant-SaaS-Plattform für Gästekommunikation, Geschäftsregeln, PMS-Integrationen, Rechnungen, Smart-Lock-Workflows und Operator-Dashboard.

  • Supabase/PostgreSQL with RLS and role-based access
  • React dashboard, workflow orchestration and API integrations
  • Claude/OpenAI, WhatsApp Business API, OAuth, Railway
AI workflow architecture
24/7
autonomous process execution
autonome Prozessausführung
Document AI · OCR · Backoffice

Automated invoice processing and document archiving

Automatische Rechnungsverarbeitung und Dokumentenarchivierung

Built an intelligent OCR and Document AI pipeline for semantic extraction, categorization and structured filing of incoming invoices and documents.

Aufbau einer OCR- und Document-AI-Pipeline zur semantischen Extraktion, Kategorisierung und strukturierten Ablage von Eingangsrechnungen und Dokumenten.

  • Node.js, n8n, Claude API, Microsoft 365 / OneDrive
  • Automatic extraction, validation and archiving
  • Clean handover for controlling and tax workflows
Document automation workflow
−10h
manual admin per week
manuelle Verwaltung pro Woche
WhatsApp · AI Agent · Sales

WhatsApp AI appointment setter

WhatsApp AI Appointment Setter

Developed an autonomous WhatsApp agent for lead qualification, appointment booking, reminders and no-show handling.

Entwicklung eines autonomen WhatsApp-Agenten für Lead-Qualifizierung, Terminbuchung, Reminder und No-Show-Handling.

  • WhatsApp Business API, Claude API, n8n, GoHighLevel
  • Multi-step state management and qualification logic
  • Automated disqualification and follow-up flows
Multi-channel sales workflow
0
manual follow-up effort
manueller Nachfassaufwand
Lead Generation · Outreach · CRM

Automated lead generation and outreach infrastructure

Automatisierte Lead-Generierung und Outreach-Infrastruktur

Built systems for scraping, enrichment, AI qualification, CRM handover and personalized outbound sequences.

Aufbau von Systemen für Scraping, Anreicherung, KI-Qualifizierung, CRM-Übergabe und personalisierte Outbound-Sequenzen.

  • SERPER, Google Places API, Apify, Smartlead, Close CRM
  • Imprint scraping and AI-powered enrichment
  • Multi-domain setup and deliverability workflows
Lead generation workflow
50+
qualified leads per day
qualifizierte Leads pro Tag
03 · Experience

Engineering background. Business execution.

Engineering-Hintergrund. Business-Umsetzung.

2025 — today

AI Automation Engineer & Product Developer

Development of AI infrastructure, automation systems and full-stack products for SMEs, agencies and hospitality operations.

2022 — 2025

Technical Process Consultant & Systems Architect

Process analysis, digital transformation concepts and technical stakeholder management across IT, engineering and industrial sectors.

2020 — 2022

Technical Account & Contract Systems Specialist

Technical evaluation and staffing of complex IT infrastructure projects, cloud architectures and enterprise software projects.

Education

M.Sc. Industrial Engineering and Management

TU Braunschweig · GPA 1.9 · semester abroad at Universitat Politècnica de València · dual B.Eng. with KRONE.

04 · About

I build systems, not demos.

Ich baue Systeme, keine Demos.

My work sits between AI engineering, backend architecture and business process design. I care about systems that survive real operations: retries, state, data consistency, integrations, monitoring and clean handover.

Meine Arbeit liegt zwischen AI Engineering, Backend-Architektur und Prozessdesign. Wichtig sind Systeme, die echten Betrieb aushalten: Retry-Logik, State, Datenkonsistenz, Integrationen, Monitoring und saubere Übergabe.

Jannes Harms working on AI systems
German nativeEnglish business fluentSpanish fluentAnthropic Claude Partner

Let’s build something useful.

Lass uns etwas Nützliches bauen.

Available for selected freelance projects involving AI automation, backend systems, workflow orchestration and production-grade integrations.

Verfügbar für ausgewählte Freelance-Projekte rund um KI-Automatisierung, Backend-Systeme, Workflow-Orchestrierung und produktive Integrationen.

jannes@jannesharms.com+49 163 519 4688LinkedInGitHub