Freelancer profile translated to English.

Description

Do you want to digitize a manual process, connect existing systems, or reliably bring a product idea into productive operation?

I design and develop individual digital systems for companies – from the initial requirements analysis, through architecture, UX/UI and development, to deployment and documentation.

Typical Projects:

Web applications, customer portals, and SaaS products
Internal tools, dashboards, and process platforms
REST APIs, system integrations, and secure data access
Databases, data processing, and reporting fundamentals
AI functions, RAG systems, Voice AI, and automations
Modern websites, headless shops, and technical migrations

I prefer to take on clearly defined projects with a defined outcome. The implementation is carried out independently and remotely, with transparent communication, traceable milestones, and a clean technical handover. For sufficiently clear scopes, fixed project prices or milestone payments are possible; for ongoing further development, I work on a daily basis.

Technically, I work with TypeScript, React, Next.js, Node.js, Python, FastAPI, PostgreSQL, REST APIs, Docker, and modern cloud platforms, among others. I choose technologies that are appropriate for the project and the existing system landscape.

My project experience ranges from a modular platform for around 150 employees to a secure SaaS backend and a complete headless commerce migration, to a GDPR-compliant Voice AI platform and a hybrid AI decision engine.

At elevenworks, I combine broad technical implementation expertise with clear responsibility for the final result.

Industry field of expertise

Languages

German
Native or bilingual
English
Conversational

Workplace preferences

Remote only

Primarily works remotely

CAIRA
Software Architecture & Full-Stack Development for Voice AI
HEALTH AND WELLNESS
April 2026 - Today (4 months)
Diedorf, Germany
Conception, architecture, and end-to-end technical implementation of a GDPR-compliant German-language Voice AI platform for mental balance at the workplace.

Development of a real-time voice pipeline with natural interruptibility
Session-spanning memory system with transparent management and deletion of stored content
Pseudonymization, EU data processing, and separation between user data and employer access
Crisis detection and defined escalation paths
Web application, landing page, authentication, and identity concept
Deployment and technical preparation of near-production live demos
Conscious positioning as a wellness application without diagnoses or therapy
Responsible for software architecture and technical implementation within a three-person founding team. The core pipeline and the public product page are functional; further product modules are under development.

Technologies: TypeScript, Next.js, React, Google Cloud, Vertex AI, Voice and LLM APIs.
Software Architecture Artificial Intelligence Voice AI Next.js Google Cloud Platform (GCP)
KLARA
Conception & Development of a Hybrid AI Decision Engine
PUBLIC SECTOR
March 2026 - Today (5 months)
Diedorf, Germany
Conception and development of a GovTech MVP for transparent, rule-based pre-screening of complex funding requirements.

Development of a deterministic seven-stage rule check
Adaptive questionnaire with traceable result determination
RAG-supported explanations based on stored legal and expert sources
Clear separation between binding rule check and supplementary AI explanation
Pseudonymization of personal data before AI processing
Complete audit trail with documented verification steps and legal bases
REST API, web application, data model, and automated tests
Containerized deployment and technical documentation
The goal is traceable and auditable decision support instead of an uninspectable black box. The MVP is currently undergoing expert review.

Technologies: Python, FastAPI, PostgreSQL, pgvector, LangGraph, RAG, Next.js, TypeScript, Docker, and pytest.
Python FastAPI Artificial Intelligence PostgreSQL Retrieval-Augmented Generation (RAG)
Mittelständisches Unternehmen (vertraulich)
Development of a Secure API Gateway for External Data Access
TELECOMMUNICATIONS
January 2026 - February 2026 (1 month)
Augsburg-Innenstadt, Germany
Conception and full-stack development of a secure API gateway for controlled access of external applications to operational data.

Development of a secured proxy and API layer
Filtering and validation of incoming requests
Allowlisting of permitted data fields, parameters, and endpoints
Pagination, date filters, and configurable access restrictions
Token-based authentication and secure password storage
Rate limiting to protect connected systems
Caching of frequently used data to reduce external API calls
Structured audit logs and traceable error handling
Administration interface for tokens, users, and access rules
Automated tests and containerized deployment
The gateway is used productively in the daily operations of a regional energy provider. Client, data provider, and connected source systems are anonymized for confidentiality reasons.

Technologies: TypeScript, Node.js, Express, PostgreSQL, Prisma, Redis, React, REST APIs, Docker, bcrypt, Zod, and Vitest.
API Development Node.js TypeScript IT Security PostgreSQL