
ONNX Experts in Germany
for production-ready machine learning with fast, precise AI matchingHire experts who convert and optimize machine learning models, connect ONNX Runtime to production systems, and deploy inference across cloud, edge, and local environments. FRATCH matches you quickly with vetted, available freelancers who fit your technical needs.
Meet FRATCH Experts in Germany, who have recently used ONNX
Niklas W.
Last position:
AI Engineer at Tensora GmbH
- Designed and developed a multi-tenant SaaS platform enabling organizations to build their own knowledge bases and chat with brand-customized AI assistants (white-label approach with dynamic branding per organization).
- Implemented a scalable RAG architecture with a GPT-4o tool-use loop, hybrid semantic search, and strict tenant isolation at database and search index level.
- Built persistent, project-like chat sessions including a streaming API (SSE), multilingual support, and speech input/output (STT/TTS).
- Delivered the cloud infrastructure as Infrastructure-as-Code, fully automated per-customer CI/CD pipelines, and an onboarding process for new tenants.
Technologies used: Python, FastAPI, Pydantic (v2 noted), Next.js, React, TypeScript, Tailwind CSS, OpenAI / LLMs (GPT-4o), Azure AI Search, Cosmos DB, Azure Blob Storage, Azure Cognitive Services Speech, Azure App Service, Azure Container Registry, Retrieval-Augmented Generation (RAG), Server-Sent Events (SSE), Docker, Terraform, GitHub Actions, REST, OpenID Connect (OIDC), Multi-Tenancy
Hamza S.
Last position:
Research Associate - AI & Autonomous Systems at Hochschule Coburg
- Developed and implemented AI-based perception and multimodal systems for real-world environments
- Built, trained, and evaluated Machine Learning and Deep Learning models using Python, PyTorch, TensorFlow, and OpenCV
- Worked with Vision-Language Models (VLMs), Large Language Models (LLMs), transformer-based architectures, and multimodal AI systems
- Applied LoRA-based fine-tuning techniques and experimented with diffusion models for generative and multimodal AI applications
- Developed multimodal perception pipelines using camera, LiDAR, and sensor data
- Designed end-to-end workflows for data processing, model training, evaluation, benchmarking, and robustness analysis
- Utilized HuggingFace Transformers and modern Deep Learning frameworks for AI experimentation and deployment workflows
- Applied GPU-accelerated computing, CUDA-based processing, ONNX, and TensorRT optimization for efficient inference and large-scale model training
- Collaborated with industry partners including Valeo and REHAU on applied AI and intelligent system projects
- Developed scalable AI architectures and prototype software solutions for automation and perception tasks
Hamza K.
Last position:
Academic Research Contributor in Health Sector (Volunteer) at n/a
- Acted as technical consultant to optimize multi-layer ensemble models combining ResNet, CNN-BiGRU-Attention, and XGBoost.
- Guided implementation of a Logistic Regression meta-learner to solve class imbalance problems, achieving 92.86% accuracy and 0.9644 AUC on PTB-XL and Chapman-Shaoxing datasets.
Danny-Michael B.
Last position:
Senior AI Engineer at Just Add AI GmbH
- Automatic detection of content on various documents
- Recommendation Engine
- Dynamic Pricing
Benjamin M.
Last position:
Founder, system architect, and main developer at Institute for Artificial Study (IAS)
- Expert-supervised AI systems for scientific reasoning, model evaluation, and research workflows.
- Built the IAS Problem Solver, an orchestrated system for difficult mathematical reasoning; it achieved 84% in one submitted answer set on the Leipzig mathematics benchmark.
- Built a resumable state-machine pipeline for research-grade mathematics benchmark generation: source selection, LLM-agent-based phenomenon discovery, task synthesis, gold-answer and certificate generation and validation, probing, repair, human feedback, and quality gates, targeting tasks that are difficult, natural, verifiable, and cost-effective.
- Current work extends this into budget-aware AI research workflows for real scientific problems with expert review.
Tech stack: Python, OpenAI/OpenRouter-compatible APIs, embeddings, RAG, SQLite.
Amr A.
Last position:
Machine Learning Engineer at German Research Center for Artificial Intelligence (DFKI)
- Developed end-to-end reproducible ML pipelines (PyTorch) with data versioning (DVC), experiment tracking (MLflow), automated testing (PyTest), and CI/CD across all training workflows.
- Scaled Vision Transformer and CNN training across NVIDIA A100 GPU clusters (CUDA, DDP, SLURM); applied hyperparameter optimization (W&B Sweeps) to reduce training overhead and identify optimal configurations.
- Developed a real-time 3D human motion generation system (ViT, VQ-VAE, SMPL-X/PIXIE) for personality-conditioned avatar synthesis; achieved state-of-the-art FID = 6.15 and P-FID = 10.31 on the UDIVA benchmark.
- Validated model expressiveness through structured user studies, achieving 86% accuracy in distinguishing extroverted vs. introverted avatar behaviors.
- Optimized inference pipelines by deploying PyTorch models via TensorRT and ONNX Runtime into native C++ code; benchmarked performance.
Valery K.
Last position:
Sr. Data Scientist & Engineer at Virtual Minds
- Development High-Performance ad distribution via auction
- Holistic (multi-campaign & multi-channel) advertisement placement optimization
- Algorithmic optimization for NP-Hard/NP-e
- Multiple Knapsack Problem with constraints
- Online estimation of parameters in stochastic environments
Tools: Python, R, Kotlin, MILP/SAT/CP Solvers, Pytorch, Pandas, Docker
Sukumar R.
Last position:
AI Consultant
- Architect end-to-end AI/ML solutions, with a strong focus on advanced LLM applications, autonomous agentic AI workflows using MCP toolset, vLM embedding computations, and robust agentic RAG pipelines to drive real-world business impact for clients across diverse sectors.
- Designed intelligent agentic AI workflows to automate knowledge retrieval and reasoning for B2B clients, accelerating business impact.
Kai W.
Last position:
Schwarz IT KG
- Migration of the software development process for medical technology software to the C/C++ package manager Conan and development of macOS-specific system components
Ghaith A.
Last position:
Lead Perception Engineer at Driving Examiner AI Platform
- Automated driver assessment by programming temporal rule engines to evaluate lane-change execution safety, head-pose mirror checks, indicator usage cycles, and compliance with traffic lights and road signs
- Synchronized real-time traffic sign recognition and multi-state traffic light classification models with time-series CAN-bus telemetry and HD-map spatial priors to grade traffic rule adherence
- Trained and deployed distinct deep learning models optimized for interior cabin monitoring and exterior surrounding-area perception
- Combined perception outputs with camera intrinsics and horizon stability checks to execute 3D ground-plane object distance estimation assuming flat-ground geometry
- Deployed a split-compute edge network across a 10-vehicle fleet via VPN, implementing a zero-allocation host memory pipeline to eliminate frame accumulation latency (6×21 FPS per vehicle)
Kevin P.
Last position:
Industry Software from Route to Invoice
Industry Software from Route to Invoice
In Production
In use at: landscaping company, two home care services
The entire workday, digital: sign-in, route plan on the vehicle, departure checks, photo documentation, time tracking, invoicing. The tablets keep working offline and sync afterward. Records are immutable, making time tracking easier to audit. Runs on a dedicated server in Germany with continuous monitoring and remote updates.
Proof: In daily use at the landscaping company with six vehicles since September 7, 2026.
- React Native on Android tablets
- Python
- SQLite
- Two-way synchronization
- Linux server in Germany
- Remote maintenance
Shiqing F.
Last position:
Technical Director at EmotionPool GmbH
- Spearheaded the EU market entry strategy for L3/L4 autonomous logistics vehicles, driving the technological localization and deployment of the parent company’s smart robotics portfolio.
- Orchestrated technical alignment between top-tier autonomous driving suppliers across China and Europe, translating complex client requirements into precise engineering specifications compliant with EU standards.
- Cultivated strategic joint R&D initiatives with leading European universities, research institutes, and enterprises, accelerating the transition of cutting-edge robotic concepts into commercial products.
- Directed the end-to-end architecture of intelligent warehousing solutions, guiding cross-functional teams in optimizing hardware integration for autonomous vehicles & robots, and overall system performance.
- Led the R&D of high-fidelity simulation and AI algorithms using NVIDIA Isaac Sim & Lab, establishing robust "Sim-to-Real" pipelines to train and validate dynamic path planning optimization, intelligent obstacle avoidance, and complex navigation stacks prior to physical deployment.
- Maintained hands-on oversight of the core system architecture, focusing on bottom-level performance tuning, AI model inference acceleration with TensorRT/ONNX Runtime, and sensor integration.
Stephan B.
Last position:
Freelance Data Scientist at Baier Data & AI Consulting
Cris L.
Last position:
Head of AI at Harvest Hub
- Leading AI development for aquaculture startup, optimising shellfish visual assessments with machine learning and computer vision.
- Development and systematic evaluation of ML/CV algorithms for shellfish condition and morphometrics, using Python, Pytorch and MLFlow.
- Analysis of model performance, including identification of failure modes and edge cases in production deployments.
- Design of annotation strategies and refinement of labelled datasets for computer vision tasks.
- Detailed analysis of system performance and communication of findings through publication-quality technical reports to investors and fellow R&D staff.
- Responsible for delivery of technical roadmap.
Ariel L.
Last position:
Sr. Principal Engineer at Slalom
- Held direct line management responsibility for a team of 4 Platform Engineers — owning hiring, performance reviews, and career development — while establishing a shared engineering standards framework and coaching culture that accelerated delivery across client engagements.
- Led a team of engineers to architect a cloud-native voice AI system for a major inspection client, enabling 2,500 field inspectors to document work fully hands-free via real-time transcription and AI agents — eliminating manual data entry across 440,000 inspections per month and reducing per-user cost from $9 to $1. Stack: AWS (DynamoDB, S3, Transcribe, CloudFront, API Gateway, Bedrock), ElevenLabs, Claude.
- Led a team of engineers to automate multi-region Kubernetes cluster management for a global SaaS leader, reducing provisioning time from 3 weeks to under a day and eliminating 90% of configuration errors. Stack: EKS, Terragrunt, Python, Bash, ArgoCD.
- Accelerator - Cloud-Agnostic AI Platform: Architected and delivered a cloud-agnostic, Kubernetes-native platform as an accelerator, enabling multi-tenant, enterprise-scale management of self-hosted LLMs with concurrent deployment of multiple base models and dynamic LoRA adapter serving. Designed production infrastructure using open-source tooling (ArgoCD, Karpenter, vLLM, SGLang) with automated model lifecycle management, API security (Keycloak + LiteLLM), and cost-optimized GPU provisioning.
Discover over 15,000 top freelancers
Statistics of experts using ONNX
Aggregated from the professional profiles of matched freelancers.
Experience
15 years

Position duration
2 years

Positions per freelancer
11

Top business areas
Information Technology, Product Development, Research and Development

Top industries
Information Technology, Automotive, Manufacturing

Certification focus areas
Information Technology, Research and Development, Business Intelligence
Bachelor's degree or higher
94%
Master's degree or higher
83%
Doctorate
17%

Certifications per freelancer
1

Most common languages
German, English, Arabic

Speak two or more languages
100%
Based on our profile pool as of 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Germany are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging within that range.
Average rates of experts in Germany using ONNX
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
ONNX experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Information Technology (100%)
- Automotive (50%)
- Manufacturing (44%)
- Banking and Finance (39%)
- Healthcare (39%)
- Aerospace and Defense (28%)
- Biotechnology (28%)
- Education (28%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Model exchange
ONNX, short for Open Neural Network Exchange, is an open format for representing machine learning models across frameworks and runtimes. It helps teams move trained models from tools such as PyTorch, TensorFlow, scikit-learn, and XGBoost into production without rebuilding the full model pipeline. The format covers graphs, tensors, operators, and model metadata.
Runtime and inference
ONNX Runtime executes exported models for efficient inference on CPUs, GPUs, mobile devices, and specialized hardware. Specialists configure execution providers, manage input and output shapes, and tune memory use, batching, threading, and precision. They also validate that conversion preserves model behavior and acceptable latency.
Ecosystem and tooling
The wider ecosystem includes framework exporters, ONNX Model Zoo, ONNX Runtime Extensions, quantization tools, and hardware-specific backends. Practical expertise often includes Python, C++, containerization, REST or gRPC services, and observability. Professionals may also work with CUDA, TensorRT, OpenVINO, DirectML, or mobile inference stacks.
Typical applications
- Serving computer vision models for inspection, detection, and image classification
- Running language and speech models in products with controlled latency
- Moving inference from cloud infrastructure to edge and embedded devices
- Standardizing model delivery across several machine learning frameworks
- Optimizing inference for industrial, automotive, retail, and healthcare systems
Germany-based teams use ONNX in factories, logistics networks, vehicles, medical products, and business software. Remote collaboration works well for model conversion and service integration, while hardware testing or regulated delivery may require on-site coordination.
When to hire specialists
Companies bring in freelance expertise when a model works in a notebook but fails during export, produces inconsistent predictions, or misses production latency targets. A specialist can review the graph, identify unsupported operators, select a suitable execution provider, and create a repeatable validation process. This is also useful when a team must support several hardware targets without maintaining separate model implementations.
Quality signals
Strong professionals distinguish model conversion from genuine production readiness. They test numerical accuracy against the source framework, document preprocessing and postprocessing, measure performance on target hardware, and handle dynamic shapes and unsupported operations deliberately. They also understand version compatibility, security, monitoring, rollback, and how ONNX fits into the wider deployment lifecycle.
Frequently asked questions
Everything clients usually want to know about ONNX, in one place.
ONNX provides a portable representation for machine learning models and helps teams run inference with different frameworks and hardware. Companies use it for computer vision, natural language, speech, recommendation, and industrial applications where consistent deployment matters.
ONNX is designed as an interchange format between frameworks, while TensorFlow SavedModel and TorchScript are more closely tied to their originating ecosystems. The right choice depends on supported operators, target hardware, conversion reliability, and which training and serving tools the team already uses.
A capable ONNX professional often works with PyTorch or TensorFlow, Python, model export APIs, Docker, CI pipelines, and inference services. Experience with CUDA, TensorRT, OpenVINO, quantization, profiling, and cloud or edge deployment is valuable when performance is a priority.
The required depth depends on the work. A simple export may need familiarity with ONNX converters, while a production migration calls for proven skill with graph inspection, unsupported operators, numerical validation, runtime configuration, and target hardware profiling.
Yes, many ONNX tasks can be completed remotely, including conversion, benchmarking, service integration, and documentation. On-site work can still help when specialists must access restricted hardware, factory systems, vehicle test environments, or internal networks in Germany.
Ask how the ONNX professional validates accuracy after conversion and measures inference on the actual deployment target. Strong answers cover preprocessing parity, operator compatibility, performance profiling, reproducible builds, monitoring, and a clear rollback plan.
Open Neural Network Exchange is the full name of ONNX, the open model representation and ecosystem. In project discussions, people usually use ONNX for the format, model files, and related tooling.
A frequent ONNX challenge is an operator that the exporter or target runtime does not support in the required form. Dynamic input shapes, custom layers, preprocessing differences, quantization, and changes in numerical output can also require graph changes or a different deployment approach.
The average hourly rate of freelancers in Germany who have used ONNX in their recent projects is 91 €, which corresponds to a daily rate of about 730 € based on an 8-hour working day.
Of the freelancers in Germany who have used ONNX in their recent projects, 94% hold at least a Bachelor's degree, 83% hold at least a Master's degree, and 17% hold a doctorate.
On average, freelancers in Germany who have used ONNX in their recent projects have 15 years of professional experience, with a single engagement typically lasting around 2 years.
The most common languages among freelancers in Germany who have used ONNX in their recent projects are German (100%), English (100%), and Arabic (11%).
The most common industries among freelancers in Germany who have used ONNX in their recent projects are Information Technology (100%), Automotive (50%), and Manufacturing (44%).
The most common business areas among freelancers in Germany who have used ONNX in their recent projects are Information Technology (94%), Product Development (94%), and Research and Development (94%).
Main locations of FRATCH Experts, who have recently used ONNX
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
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