Software engineer building AI, mobile and backend systems

I have 10+ years of experience shipping production software, from security-sensitive healthcare apps to ML-backed search and forecasting systems.

Based in Vienna

GitHub·LinkedIn·viktor.ludwig@gmail.com

Selected Work

Healthcare Mobile App

ITSV / MeineÖGK

Built and maintained patient-facing mobile features for Austria's public healthcare providers.

  • Developed under strict requirements for sensitive personal health data.
  • Shipped features within a large engineering organization with structured release and QA processes.

React Native · Expo · React · TypeScript

Image Similarity Search Platform

LexiCam

Built a mobile and web platform with an ML-based reverse image search system.

  • Designed embedding-based similarity search with latency, cost and scalability tradeoffs.
  • Implemented backend services for autocomplete, search and file storage.
  • Integrated mobile, web, ML and backend components into a coherent production system.

React Native · Next.js · PyTorch · FastAPI · MongoDB · Elasticsearch · Kubernetes

lexicam.app

Forecasting & Analytics Systems

Energytrack / PwC

Built forecasting pipelines and analytics applications.

  • Implemented time-series forecasting for energy and workforce planning data.
  • Built custom analytics interfaces for exploration and prediction workflows.

Python · Prophet · statsmodels · Bokeh · PostgreSQL · Docker

Technical Focus

I mainly work with TypeScript, React Native & Python

AI & Search Systems

Model development, evaluation workflows, inference APIs and retrieval systems designed around latency and cost constraints.

Mobile Applications

Cross-platform applications for iOS and Android, including production work with security requirements.

Backend & Infrastructure

Production backend services, REST APIs, search infrastructure and scalable data stores.

Deployment & Operations

Containerized services, cloud deployments and maintaining production systems.

Experience

Public Healthcare

Patient-facing mobile software for healthcare services.

Startups & Small Teams

End-to-end software development from concept to production.

Consulting

Forecasting, analytics and automation for operational workflows.

About

I like to build useful things.

I enjoy solving difficult technical problems and exploring new technologies, but I care most about software that proves useful in the real world.

Outside of work, I play guitar, do sports, and have a soft spot for ancient Oriental art.

Portrait of Viktor Ludwig

Contact

I am based in Vienna, feel free to reach out.

GitHub·LinkedIn·viktor.ludwig@gmail.com