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ONNX Expert in Germany

in minutes from over 15,000 CVs with the power of AI.

Hire experts who seamlessly port deep learning models across frameworks, optimize runtime execution with ONNX Runtime, and deploy high-performance AI solutions on local German infrastructure. Get matched with vetted, available freelancers in minutes.

Meet FRATCH Experts in Germany, who have recently used ONNX

Verified expert

Danny-Michael Busch

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Senior AI Engineer

Bremen
Danny-Michael Busch

Last position:

Senior AI Engineer at Just Add AI GmbH

  • Automatic detection of content on various documents
  • Recommendation Engine
  • Dynamic Pricing
Verified expert

Benjamin Matschke

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AI/ML/CV Engineer, System Architect, Founder, Mathematician

Cottbus
Benjamin Matschke

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.

Verified expert

Cris Lovell-Smith

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Applied Machine Learning Engineer

Cris Lovell-Smith

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.
Verified expert

Hamza Salaar

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AI Engineer | Computer Vision & Multimodal Perception Systems

Kronach
Hamza Salaar

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
Verified expert

Ariel Lev

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Engineering Manager · AI Platform Architect · Cloud-Native Infrastructure

Ingolstadt
Ariel Lev

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.
Verified expert

Valery Khamenya

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AdTech Engineer & Data Scientist

Munich
Valery Khamenya

Last position:

Sr. Data Scientist & Engineer at Virtual Minds

  • Development of 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

Verified expert

Amr Amer

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Machine Learning Engineer

Saarbrücken
Amr Amer

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.
Verified expert

Hamza Khan

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Academic Research Contributor in Health Sector (Volunteer)

Berlin
Hamza Khan

Last position:

Academic Research Contributor in Health Sector (Volunteer)

  • 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.
Verified expert

Ghaith Ale

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Lead Perception Engineer

Cottbus
Ghaith Ale

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)
Verified expert

Kai Wolf

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Freelance C++/Embedded Consultant — Computer Vision, Embedded ML & Build Systems

Wiesbaden
Kai Wolf

Last position:

Schwarz IT KG

  • Migration of the software development process of a medical technology software to C/C++ package manager Conan and development of macOS-specific system components
Verified expert

Shiqing Fan

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Vehicle Software and OS Expert

Munich
Shiqing Fan

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.
Verified expert

Stephan Baier

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Freelance Data Scientist

Munich
Stephan Baier

Last position:

Freelance Data Scientist at Baier Data & AI Consulting

Verified expert

Surya Alla

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AI Software Engineer

Siegen
Surya Alla

Last position:

AI Software Engineer at Fraunhofer FIT

  • Developed LLM-based automation utilities including structured reasoning pipelines, LLM-as-a-Judge evaluation tools, and multi-model comparison frameworks.
  • Built RAG pipelines for internal research workflows using LangChain, ChromaDB, and FastAPI, enabling semantic retrieval and multi-step reasoning.
  • Integrated LLM microservices into existing ML systems using Docker, FastAPI, and GitLab CI/CD with reproducible deployment workflows.
  • Designed inference APIs combining vision models and LLM reasoning for multimodal analytics and decision-making.
  • Optimized embedding-based retrieval using vector store pruning, improved chunking logic, and dynamic retriever selection.
  • Performed prompt engineering and system instruction tuning for consistency, robustness, and reasoning quality.
  • Built benchmarking suites to evaluate LLM latency, reasoning quality, retrieval accuracy, and robustness under different prompt templates.
Verified expert

Uddipan Basu Bir

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Research Team Member

Erlangen
Uddipan Basu Bir

Last position:

Research Team Member at Munich Music Labs, TUM

  • Focused on exploring the intersection of Music and AI.

Discover over 15,000 top freelancers

Statistics of experts using ONNX

Aggregated from the professional profiles of matched freelancers.

Experience

15 years

Position duration

1.9 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

81%

Doctorate

19%

Certifications per freelancer

1

Most common languages

German, English, Arabic

Speak two or more languages

100%

Based on our profile pool as of 30 Aug 2026.

Daily rate distribution

0 3 6 9 12
<€400 €400-​480 €560-​640 €640-​720 €800+

The chart shows how the daily rates of freelancers in this technology in Germany are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows how many freelancers charge within that range.

Average rates of experts in Germany using ONNX

Rates are based on recent contracts and do not include FRATCH margin.

1000
750
500
250
Rate comparison chart
Daily rate avg. 728 €

The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.

1000
750
500
250
Rate comparison chart
Median rate 800 €

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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.

About the technology

Standardizing Machine Learning Model Formats

The Open Neural Network Exchange, widely known as ONNX, acts as a shared format for machine learning algorithms. It allows models trained in one framework to be executed in another, preventing vendor lock-in and streamlining the transition from research to production. Engineers utilize this technology to build flexible, high-performance pipelines that integrate diverse machine learning components.

Cross-Framework Model Conversion

Freelance specialists frequently use this technology to translate complex deep learning architectures across different development ecosystems. This process involves converting custom layers and operations to ensure full compatibility.

  • PyTorch model exports to unified formats
  • TensorFlow and Keras integration pipelines
  • Scikit-learn classification model conversions
  • Custom operator mapping for specialized layers

Execution Optimization via ONNX Runtime

Running models efficiently requires leveraging specialized hardware backends and execution engines. Specialists configure the runtime to target specific chips, utilizing acceleration libraries like CUDA, TensorRT, and OpenVINO. This ensures that deep learning models run with minimal latency and reduced memory footprints during inference.

Common Enterprise Deployment Targets

Deploying serialized models spans a wide variety of hardware architectures and infrastructure setups. Professionals configure these runtimes to meet strict operational constraints across diverse environments.

  • Edge computing devices and embedded systems
  • Scalable cloud microservices and serverless functions
  • Local desktop applications with hardware acceleration
  • Web browsers using specialized runtime web assemblies

Technical Skills of Top Specialists

A proficient professional possesses deep knowledge of graph optimization, model quantization, and precision reduction techniques like FP16 or INT8 conversion. They understand how mathematical operations map to underlying hardware instructions. This technical depth allows them to debug numerical discrepancies that sometimes occur during format conversion.

Value in the German Industrial Landscape

In Germany, companies often deploy these optimized models within highly regulated environments like automotive manufacturing and medical engineering. Local organizations prioritize on-premise execution and edge deployment to comply with strict data privacy standards. Engaging a specialized professional helps local engineering teams integrate high-throughput inference directly into their physical production lines.

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Frequently asked questions

Everything clients usually want to know about ONNX, in one place.

ONNX is used to serialize and deploy machine learning models across different hardware platforms without rewriting the original codebase. This format allows enterprises to train models in PyTorch or TensorFlow and run them efficiently on specific edge devices or cloud servers.

Specialists resolve discrepancies by mapping custom layers to standard operators within the Open Neural Network Exchange ecosystem. When automatic conversion tools fail, they write custom runtime plugins or optimize the model graph directly to preserve accuracy.

Using ONNX decoupled from the training framework reduces runtime overhead and simplifies the deployment stack. It allows teams to run inference using a highly optimized, lightweight engine without installing heavy deep learning libraries like PyTorch.

The ONNX Runtime is the execution engine that actually runs the serialized model file on the target hardware. It applies graph optimizations and leverages hardware acceleration libraries to maximize execution speed on both CPUs and GPUs.

Yes, most ONNX model optimization and deployment tasks can be handled remotely. However, for projects involving specialized physical hardware or embedded systems located in Germany, professionals may occasionally coordinate on-site visits to conduct final testing.

While Python is the primary language for training and initial serialization, experts working with ONNX often use C++ or C# for production deployment. This allows them to integrate deep learning models directly into high-performance desktop or embedded applications.

A qualified professional verifies the ONNX model by comparing the outputs of the converted file against the original framework predictions using a standardized test dataset. They ensure that precision loss from quantization or graph optimization remains within acceptable limits.

Beyond deep knowledge of ONNX, a strong specialist should understand containerization with Docker, hardware acceleration APIs, and general MLOps practices. Familiarity with cloud platforms and local deployment infrastructure is also highly beneficial.

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 728 € 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, 81% hold at least a Master's degree, and 19% 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 1.9 years.

The most common languages among freelancers in Germany who have used ONNX in their recent projects are German (100%), English (100%), and Arabic (13%).

The most common industries among freelancers in Germany who have used ONNX in their recent projects are Information Technology (100%), Automotive (56%), and Manufacturing (50%).

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.

Berlin Hamburg Munich Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg

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Philipp Thomaschewski

FRATCH CEO

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