FastAPI Experts in Vienna
, matched with vetted and available freelancers in minutesHire experts who create high-performance Python APIs, asynchronous services and production-ready integrations with tools such as Pydantic, Starlette and SQLAlchemy. FRATCH connects you with vetted, available freelancers through fast, precise AI matching.
Meet FRATCH Experts in Vienna, who have recently used FastAPI
Manuel P.
Last position:
AI Engineer at Misumi Europe GmbH & Motius GmbH
- Designed and built a next-generation NLP platform to accelerate sales-driven customer service through intelligent request analysis and routing, reducing average customer query response time by 30%.
- Architected a hybrid NLP system combining Large Language Models (LLMs) with traditional NLP pipelines for robust, explainable results.
- Developed request classification and routing mechanisms to accelerate customer support teams in handling customer queries faster and more accurately.
- Optimized LLM based data extraction and classification with context engineering.
- Integrated the platform into customer service processes, reducing response times and enhancing workforce efficiency.
Roman M.
Last position:
Software Engineer at FSM Rechtsanwälte
- Develop AWS-based components connecting Python backend services to React/TypeScript frontends.
- Improve database queries and application workflows for document processing and screening.
- Evaluate LLM retrieval and document-review workflows as part of the product stack.
Marcel S.
Last position:
Senior AI Engineer - Python at Insurance Company
Project Tech Stack: Python, AWS, Azure, FastAPI, openai, pandas, unittest/pymock
Achievements:
- Engineered automated data extraction pipelines to transform complex Excel datasets into structured formats via LLM-driven workflows.
- Architected a generative slide-deck engine that translates natural language prompts into formatted presentation assets.
- Integrated advanced LLM capabilities with the OpenAI Response API, implementing sophisticated tool-calling and structured output logic.
- Developed and containerized scalable backend microservice using FastAPI, Docker, and OpenShift to host and serve agentic skills.
Marc-Anthony T.
Last position:
Software Developer at Dawnguard.AI
- Foundational member of the backend TypeScript team, responsible for translating the initial product concept into a fully functional platform.
- Architected the core resource discovery engine for Azure and AWS, successfully enabling the frontend to visualize complex cloud environments and empowering the AI to evaluate architectural patterns.
- Engineered and scaled distributed APIs and dynamic CosmosDB schemas, ensuring the database and backend architecture could seamlessly adapt to rapidly evolving product requirements.
- Accelerated cross-functional testing by developing custom data-generation tools, allowing the AI and frontend teams to simulate and test against large-scale, artificial cloud architectures.
- Drove end-to-end feature delivery by partnering closely with AI, frontend, and business stakeholders to align technical implementation with the strategic vision of the Dawnguard platform.
Jürgen E.
Last position:
Chief Executive Officer at Riddle&Code GmbH
- Pivoted the company into data-driven and AI-powered energy optimization solutions for microgrids, energy communities, and grid operators.
Patrik G.
Last position:
Engineering & Development at TOBG Services Ltd
- Increased system uptime and performance while decreasing costs. Managing server infrastructure for DLT and application services
- Design and implement AI-workflow automation
- Developed the stakit.io App using Redis, Prometheus, Grafana
- Creating a multi-AI chat App with advanced AI-integration
- Developing an AI-powered document analysis solution for in-house and service deployment
Discover over 15,000 top freelancers
Statistics of experts using FastAPI
Aggregated from the professional profiles of matched freelancers.
Experience
16 years
Position duration
2.2 years
Positions per freelancer
11
Top business areas
Information Technology, Product Development, Business Intelligence
Top industries
Information Technology, Banking and Finance, Professional Services
Bachelor's degree or higher
80%
Master's degree or higher
40%
Certifications per freelancer
1
Most common languages
German, English, Spanish
Speak two or more languages
100%
Based on our profile pool as of 16 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Vienna 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 Vienna using FastAPI
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 16 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
FastAPI 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%)
- Banking and Finance (50%)
- Professional Services (50%)
- Education (33%)
- Healthcare (33%)
- Transportation (33%)
- Manufacturing (33%)
- Media and Entertainment (33%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
API foundations
FastAPI is a modern Python framework for building web APIs and backend services. It combines type hints, automatic validation and OpenAPI documentation with an ASGI-based runtime suited to asynchronous workloads. Teams use it for REST endpoints, internal services and data-driven applications.
Where it fits
FastAPI supports systems that need clear contracts, responsive request handling and quick iteration.
- REST and JSON APIs for web and mobile products
- Microservices connecting business domains
- Machine learning inference and data services
- Internal tools, gateways and integration layers
Core ecosystem
The framework builds on Starlette for web capabilities and Pydantic for parsing and validation. Strong specialists also work with Uvicorn or Gunicorn, SQLAlchemy, Alembic, pytest, Docker and PostgreSQL. OAuth2, JWT, background tasks, WebSockets and observability are common parts of a complete delivery.
When expertise matters
Companies bring in freelance specialists when an API must move from prototype to a reliable production service, or when an existing backend needs clearer contracts and better throughput. In Vienna, FastAPI work can support software products, financial services, research teams and industrial systems, with remote or on-site collaboration depending on security and team needs.
- Define reusable API schemas and versioning
- Connect databases, queues and external services
- Add authentication, testing and deployment automation
What strong specialists deliver
Good FastAPI professionals design boundaries before writing endpoints. They separate routing, domain logic and persistence, handle errors consistently and protect asynchronous code from blocking operations. They also produce usable OpenAPI documentation and tests that reflect real failure cases.
Choosing the right fit
Review comparable API work, architecture decisions and evidence of production operations rather than framework familiarity alone. Discuss Python conventions, async programming, database transactions, security, CI/CD and cloud deployment during the first conversation. Vienna-based teams may also value German communication, while remote delivery can work well with precise English documentation and regular technical reviews.
Frequently asked questions
Before you brief your next project: the most common questions about FastAPI.
FastAPI is used to build REST APIs, microservices, backend services and inference endpoints in Python. Its automatic validation and OpenAPI documentation help teams define reliable interfaces quickly.
FastAPI focuses on typed APIs, asynchronous request handling and automatic interface documentation. Django offers a broader full-stack toolkit, while Flask is smaller and more flexible but usually requires more manual choices for validation and API structure.
A strong FastAPI specialist commonly works with Python typing, Pydantic, Starlette, SQLAlchemy and PostgreSQL. Docker, cloud deployment, CI/CD, authentication, testing and observability are also valuable for production work.
The required depth depends on the system, not only on the framework. A small API may need focused Python and testing skills, while a distributed service benefits from experience with asynchronous design, database performance, security and operations.
Yes, FastAPI projects are often suitable for remote collaboration because API contracts, pull requests and automated tests make progress visible. On-site work in Vienna can still help when the service connects to protected networks, regulated data or hardware.
Assess whether the FastAPI implementation has clear schemas, consistent errors, useful tests and documented authentication flows. Ask how the specialist handles blocking calls, database transactions, versioning, monitoring and failures under load.
FastAPI is a practical interface layer for serving model predictions, preprocessing requests and exposing health checks. It does not replace the model runtime or data pipeline, so the specialist should also understand resource limits, async boundaries and deployment patterns.
A FastAPI freelancer should be ready to align API design with the client’s Python standards, security requirements and release process. Vienna teams may prefer German communication in workshops, but clear English documentation and disciplined remote collaboration are widely useful.
The average hourly rate of freelancers in Vienna, Austria who have used FastAPI in their recent projects is 99 €, which corresponds to a daily rate of about 790 € based on an 8-hour working day.
Of the freelancers in Vienna, Austria who have used FastAPI in their recent projects, 80% hold at least a Bachelor's degree and 40% hold at least a Master's degree.
On average, freelancers in Vienna, Austria who have used FastAPI in their recent projects have 16 years of professional experience, with a single engagement typically lasting around 2.2 years.
The most common languages among freelancers in Vienna, Austria who have used FastAPI in their recent projects are German (100%), English (100%), and Spanish (17%).
The most common industries among freelancers in Vienna, Austria who have used FastAPI in their recent projects are Information Technology (100%), Banking and Finance (50%), and Professional Services (50%).
The most common business areas among freelancers in Vienna, Austria who have used FastAPI in their recent projects are Information Technology (100%), Product Development (100%), and Business Intelligence (50%).
Main locations of FRATCH Experts, who have recently used FastAPI
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.
Countries:
Vienna 
Graz Request a free demo
Get in touch with the FRATCH team and we will get back to you within 4 hours.
Would you rather directly get in touch?
We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
