Senior Backend & AI Engineer specializing in Python, Node.js, REST APIs, AI/LLM integration, data pipelines, and scalable backend systems.
Aktualisiert am 09.09.2026
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 14.09.2026
Verfügbar zu: 100%
davon vor Ort: 0%
Künstliche Intelligenz
Back-End
E-Commerce
Front-End
Mobile Apps
German
Native
English
Fluent (C1)
Spanish
Intermediate (B1)
French
Basic (A2)

Einsatzorte

Einsatzorte

Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

3 years 1 month
2023-09 - now

AI-driven data enrichment

Senior Backend and AI Engineer Python Node.js LLM APIs ...
Senior Backend and AI Engineer
  • AI-driven data enrichment: Built backend services applying LLM APIs to large-scale content processing, including automated classification, enrichment and generation over hotel and destination data, with prompt design, output validation and provider fallback handling. 
  • Data pipeline engineering: Designed Python ETL and normalisation pipelines consolidating heterogeneous supplier feeds into a single consistent schema, with deduplication and record-matching logic. 
  • API architecture: Own the design and maintenance of REST services consumed by web clients and partner integrations, covering versioning, authentication, rate limiting and caching strategy. 
  • Technical leadership: Drive architecture decisions, code review and the release process; mentor engineers and set standards for testing and technical documentation. 
Python Node.js LLM APIs PostgreSQL Next.js
GIATA / Die 101 Besten
1 year 10 months
2021-11 - 2023-08

Logistics SaaS

Backend Developer PHP Laravel MySQL ...
Backend Developer
  • Logistics SaaS: Built backend features for a post-purchase shipping and tracking platform, including multi-carrier API integration, tracking event normalisation across providers and automated customer notification workflows. 
  • Reliability engineering: Handled high-volume tracking data ingestion with retry, deduplication and failure-recovery logic against unreliable third-party carrier APIs. 
  • Merchant integrations: Connected the platform to e-commerce systems and shop backends through REST APIs and webhooks. 
PHP Laravel MySQL REST APIs carrier integrations
PAQATO
3 years 6 months
2018-05 - 2021-10

Enterprise backend development

Backend Engineer Python REST APIs SQL ...
Backend Engineer
  • Enterprise backend development: Developed and maintained backend services and internal APIs in a regulated enterprise environment, working to strict security, data protection and code review standards. 
  • Systems integration: Built integration layers between internal platforms and third-party services, including data validation, error handling and audit logging. 
  • Process automation: Replaced recurring manual processes with Python tooling and scheduled jobs, reducing operational workload for internal teams. 
Python REST APIs SQL enterprise systems integration
Allianz
2 years 10 months
2015-07 - 2018-04

Platform delivery

Senior Backend Engineer Python Node.js Next.js ...
Senior Backend Engineer
  • Platform delivery: Led the backend and API layer for a multilingual international university platform serving prospective students across Europe and Asia, covering structured content modelling, API-driven rendering and integration with admissions workflows. 
  • Performance engineering: Optimised data fetching, caching strategy and build pipelines for a content-heavy platform, improving page load performance and Core Web Vitals. 
  • Systems integration: Connected CRM, application forms and marketing automation systems through REST APIs and webhooks, replacing manual admissions handling with automated workflows.
Python Node.js Next.js Sanity headless CMS PostgreSQL
UMCH - Medical University Hamburg
2 years 10 months
2012-09 - 2015-06

Developed and maintained a PHP and MySQL e-learning platform covering

Web Developer PHP MySQL JavaScript ...
Web Developer
  • Developed and maintained a PHP and MySQL e-learning platform covering user accounts, course and progress tracking, payment handling and administrative tooling. 
  • Built custom modules and database-backed features; handled Linux server setup, deployment, security updates and ongoing maintenance. 
PHP MySQL JavaScript Linux
Prozubi

Aus- und Weiterbildung

Aus- und Weiterbildung

2 years 11 months
2009-10 - 2012-08

B.Sc. Informatik (Computer Science)

Hochschule Niederrhein, Mönchengladbach, Germany
Hochschule Niederrhein, Mönchengladbach, Germany

Kompetenzen

Kompetenzen

Top-Skills

Künstliche Intelligenz Back-End E-Commerce Front-End Mobile Apps

Produkte / Standards / Erfahrungen / Methoden

PROFESSIONAL SUMMARY

Backend engineer with 14 years of professional software experience (since 2012) across travel technology, insurance, logistics, education and e-commerce. Builds and operates Python and Node.js REST services powering high-traffic web platforms and consumer mobile applications, including data pipelines, subscription and payment flows, telehealth infrastructure and large-scale third-party API integration. Current focus is AI-driven backend engineering: LLM API orchestration, automated content generation and intelligent data enrichment at scale. Native German, fluent English. 


TECHNICAL SKILLS

  • Backend: Django, Django REST Framework, Node.js, Express, Laravel, REST API design, JWT, OAuth2, webhooks, background jobs, message queues 
  • AI and Automation: LLM API integration (OpenAI, Anthropic), prompt engineering, AI content generation pipelines, data enrichment, workflow automation 
  • Cloud and DevOps: Docker, CI/CD, GitHub Actions, AWS, Vercel, Linux server administration, Git, deployment and release management 
  • Integrations: Twilio, RevenueCat, Shopify Admin API, Shopify Storefront API, payment gateways, carrier and logistics APIs, CRM integration 
  • Frontend: Next.js, React, Vue.js, Flutter, HTML, CSS, Tailwind CSS 
  • Methods: Clean architecture, code review, technical documentation, Agile, Scrum, team leadership, technical consulting 


SELECTED FREELANCE AND CONTRACT PROJECTS

Treat at Home, telehealth platform | Python, Django REST Framework, Flutter, Twilio

Built the Django backend and REST API covering appointment scheduling, patient records, role-based access control and secure handling of sensitive health data; integrated Twilio for in-app video consultation and SMS. Released on iOS and Android. 


Crayo .ai, AI content generation SaaS | Node.js, LLM APIs, cloud infrastructure

Backend services and third-party AI API orchestration for a platform generating short-form video content from text prompts, with asynchronous handling of long-running generation jobs. 


GoEquipMe, peer-to-peer rental marketplace | Node.js, Flutter, Firebase

Marketplace backend covering listings, availability and booking lifecycle, geolocation search and real-time messaging between owners and renters. 


Headless and custom e-commerce | Shopify Admin and Storefront APIs, Next.js, Node.js

Custom storefronts and backend integrations for Alb-Filter, Mushroomrise, Teddy Howler, BestCarwash and Falkenwald, including product and inventory synchronisation, checkout flows and connections to fulfilment and marketing systems. 

Programmiersprachen

Python
JavaScript
TypeScript
PHP
SQL
Dart

Datenbanken

PostgreSQL
MySQL
Redis
Firebase
Firestore
Sanity headless CMS
ETL
data normalisation

Einsatzorte

Einsatzorte

Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

3 years 1 month
2023-09 - now

AI-driven data enrichment

Senior Backend and AI Engineer Python Node.js LLM APIs ...
Senior Backend and AI Engineer
  • AI-driven data enrichment: Built backend services applying LLM APIs to large-scale content processing, including automated classification, enrichment and generation over hotel and destination data, with prompt design, output validation and provider fallback handling. 
  • Data pipeline engineering: Designed Python ETL and normalisation pipelines consolidating heterogeneous supplier feeds into a single consistent schema, with deduplication and record-matching logic. 
  • API architecture: Own the design and maintenance of REST services consumed by web clients and partner integrations, covering versioning, authentication, rate limiting and caching strategy. 
  • Technical leadership: Drive architecture decisions, code review and the release process; mentor engineers and set standards for testing and technical documentation. 
Python Node.js LLM APIs PostgreSQL Next.js
GIATA / Die 101 Besten
1 year 10 months
2021-11 - 2023-08

Logistics SaaS

Backend Developer PHP Laravel MySQL ...
Backend Developer
  • Logistics SaaS: Built backend features for a post-purchase shipping and tracking platform, including multi-carrier API integration, tracking event normalisation across providers and automated customer notification workflows. 
  • Reliability engineering: Handled high-volume tracking data ingestion with retry, deduplication and failure-recovery logic against unreliable third-party carrier APIs. 
  • Merchant integrations: Connected the platform to e-commerce systems and shop backends through REST APIs and webhooks. 
PHP Laravel MySQL REST APIs carrier integrations
PAQATO
3 years 6 months
2018-05 - 2021-10

Enterprise backend development

Backend Engineer Python REST APIs SQL ...
Backend Engineer
  • Enterprise backend development: Developed and maintained backend services and internal APIs in a regulated enterprise environment, working to strict security, data protection and code review standards. 
  • Systems integration: Built integration layers between internal platforms and third-party services, including data validation, error handling and audit logging. 
  • Process automation: Replaced recurring manual processes with Python tooling and scheduled jobs, reducing operational workload for internal teams. 
Python REST APIs SQL enterprise systems integration
Allianz
2 years 10 months
2015-07 - 2018-04

Platform delivery

Senior Backend Engineer Python Node.js Next.js ...
Senior Backend Engineer
  • Platform delivery: Led the backend and API layer for a multilingual international university platform serving prospective students across Europe and Asia, covering structured content modelling, API-driven rendering and integration with admissions workflows. 
  • Performance engineering: Optimised data fetching, caching strategy and build pipelines for a content-heavy platform, improving page load performance and Core Web Vitals. 
  • Systems integration: Connected CRM, application forms and marketing automation systems through REST APIs and webhooks, replacing manual admissions handling with automated workflows.
Python Node.js Next.js Sanity headless CMS PostgreSQL
UMCH - Medical University Hamburg
2 years 10 months
2012-09 - 2015-06

Developed and maintained a PHP and MySQL e-learning platform covering

Web Developer PHP MySQL JavaScript ...
Web Developer
  • Developed and maintained a PHP and MySQL e-learning platform covering user accounts, course and progress tracking, payment handling and administrative tooling. 
  • Built custom modules and database-backed features; handled Linux server setup, deployment, security updates and ongoing maintenance. 
PHP MySQL JavaScript Linux
Prozubi

Aus- und Weiterbildung

Aus- und Weiterbildung

2 years 11 months
2009-10 - 2012-08

B.Sc. Informatik (Computer Science)

Hochschule Niederrhein, Mönchengladbach, Germany
Hochschule Niederrhein, Mönchengladbach, Germany

Kompetenzen

Kompetenzen

Top-Skills

Künstliche Intelligenz Back-End E-Commerce Front-End Mobile Apps

Produkte / Standards / Erfahrungen / Methoden

PROFESSIONAL SUMMARY

Backend engineer with 14 years of professional software experience (since 2012) across travel technology, insurance, logistics, education and e-commerce. Builds and operates Python and Node.js REST services powering high-traffic web platforms and consumer mobile applications, including data pipelines, subscription and payment flows, telehealth infrastructure and large-scale third-party API integration. Current focus is AI-driven backend engineering: LLM API orchestration, automated content generation and intelligent data enrichment at scale. Native German, fluent English. 


TECHNICAL SKILLS

  • Backend: Django, Django REST Framework, Node.js, Express, Laravel, REST API design, JWT, OAuth2, webhooks, background jobs, message queues 
  • AI and Automation: LLM API integration (OpenAI, Anthropic), prompt engineering, AI content generation pipelines, data enrichment, workflow automation 
  • Cloud and DevOps: Docker, CI/CD, GitHub Actions, AWS, Vercel, Linux server administration, Git, deployment and release management 
  • Integrations: Twilio, RevenueCat, Shopify Admin API, Shopify Storefront API, payment gateways, carrier and logistics APIs, CRM integration 
  • Frontend: Next.js, React, Vue.js, Flutter, HTML, CSS, Tailwind CSS 
  • Methods: Clean architecture, code review, technical documentation, Agile, Scrum, team leadership, technical consulting 


SELECTED FREELANCE AND CONTRACT PROJECTS

Treat at Home, telehealth platform | Python, Django REST Framework, Flutter, Twilio

Built the Django backend and REST API covering appointment scheduling, patient records, role-based access control and secure handling of sensitive health data; integrated Twilio for in-app video consultation and SMS. Released on iOS and Android. 


Crayo .ai, AI content generation SaaS | Node.js, LLM APIs, cloud infrastructure

Backend services and third-party AI API orchestration for a platform generating short-form video content from text prompts, with asynchronous handling of long-running generation jobs. 


GoEquipMe, peer-to-peer rental marketplace | Node.js, Flutter, Firebase

Marketplace backend covering listings, availability and booking lifecycle, geolocation search and real-time messaging between owners and renters. 


Headless and custom e-commerce | Shopify Admin and Storefront APIs, Next.js, Node.js

Custom storefronts and backend integrations for Alb-Filter, Mushroomrise, Teddy Howler, BestCarwash and Falkenwald, including product and inventory synchronisation, checkout flows and connections to fulfilment and marketing systems. 

Programmiersprachen

Python
JavaScript
TypeScript
PHP
SQL
Dart

Datenbanken

PostgreSQL
MySQL
Redis
Firebase
Firestore
Sanity headless CMS
ETL
data normalisation

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