REST API Experts in Austria
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Meet FRATCH Experts in Austria, who have recently used REST API
Christian W.
Last position:
Lead Developer & Performance Specialist at Groox GmbH
Sole responsibility for the design, development and deployment of the bilingual Qwik platform eventvideo.at. Responsible for frontend performance optimization (PageSpeed 97/100/100/100), SEO engineering with Schema.org, integration of Google Search Console and IndexNow, and building the GitHub Actions CI/CD pipeline. Requirements gathering and technical implementation.
- Performance Engineering: Google PageSpeed Score 97/100/100/100 (Performance / Accessibility / Best Practices / SEO) through frontend optimization (lazy loading, thumbnail-first, lightweight media integration)
- Full-Stack Web Development: Sole responsibility for development with the Qwik.js framework from frontend to deployment for the bilingual (DE/EN) platform eventvideo.at, marketing personalized, fully automated participant videos for sports events
- Qwik.js Resumability Architecture: Server-side rendering with minimal JavaScript hydration overhead; the page remains immediately interactive even with extensive video and event content, without a full-page load.
- API Integration: Google Search Console API and IndexNow API for automated indexing and SEO monitoring
- SEO Engineering: Schema.org Structured Data implementation for rich snippets and improved search engine visibility
- Mobile-First with minimal bundle size: CSS3 layout without UI framework overhead, consistently lean use of resources for excellent PageSpeed on desktop and mobile.
- GitHub Actions CI/CD: Automated build, test and deployment pipeline for continuous integration
Technologies: Qwik.js Framework, TypeScript, JavaScript, Internationalization (i18n DE/EN), GitHub Actions CI/CD, Google Search Console API, IndexNow API, Schema.org, Google PageSpeed Insights, Lazy Loading, CSS3, Responsive Design
Chrisabel P.
Last position:
AI Systems & Product Strategy Expert at Webmeisterin
I build. I advise. I think in systems. After years leading digital transformation at scale — Accenture, BP, Lidl — I made a deliberate choice: trade platform dependency for structural independence. My focus is at the intersection of AI systems, product strategy, and venture thinking. I work with operators and founders who want to move fast without losing control — of their data, their stack, their direction.
Daniel S.
Last position:
AI Strategy & Use-Case Development at Umwelt Service Salzburg
- AI strategy concept and implementation roadmap for an energy consulting company.
- Use-case matrix with nine application scenarios (including funding research, chatbot, initial AI consulting, topic radar), implemented as reusable Claude Code skills.
- AI strategy, use-case analysis / Claude Code Skills / n8n.
Matthias K.
Last position:
Requirements Engineer & Business Analyst at Media Company
Analysis of existing work, information and decision-making processes.
Identification and prioritization of suitable use cases for AI agents.
Elicitation of functional and non-functional requirements.
Design of collaboration between users and AI agents, including control and escalation mechanisms.
Support for the implementation of the AI agents and adapted keyboard hardware.
Business target vision for the AI-first transformation.
Structured and prioritized requirements for implementation.
Defined roles, interactions and control points between people and AI agents.
Preparation for the gradual automation of productive work processes.
Techstack: AI agents, LLMs, agent orchestration, RAG, APIs, automation, hardware
Karl F.
Last position:
Managing Director at ONECEPT GmbH
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.
Michael L.
Last position:
IAM Developer & IT Architect at Internationale Bank
Design and implementation of new functionalities in the areas of Lifecycle Management (LCM), Role Management (RLM) and Access Governance
Adjustment of the company-wide Segregation of Duties (SoD) matrix to ensure regulatory and internal compliance requirements
Further development and configuration of recertification processes
Creation and adaptation of custom workflows, rules and tasks in SailPoint IdentityIQ (BeanShell, XML, Java)
Use of static code analysis with SonarQube to ensure code quality and compliance with defined development standards
Regular code reviews within the development team to ensure quality, share knowledge and follow clean code principles
Work in an agile Scrum team with daily communication, sprint planning and reviews
Coordination with testers, test managers and business departments to ensure quality and smooth production rollout
Active involvement in release planning and deployment coordination, including test preparation, cutover activities and rollback strategies
Analysis and sustainable resolution of issues in the IAM production environment (2nd- and 3rd-level support)
Reproduction of complex errors, identification of root causes and implementation of lasting fixes
Creation of technical analyses and recommendations for operations and further development
Markus F.
Last position:
Managing Director & Senior Consultant at IT-Trail GmbH
- Custom software development
- Web hosting
- Support
- DevOps
- Technologies: C#, Node.js, Web, Windows, Linux, SQL, MS365, Azure, AWS
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.
Immo M.
Last position:
Interim Manager/Management Consultant at Austrian regional energy supplier
Further development of the data analytics system landscape based on MS Power BI
- Concept and development of ETL processes, primary data source SAP IS/U incl. extraction via Theobald extractors to Azure Synapse, support with SAP S/4 conversion
- Support in the concept and development of data models in Azure Synapse Analytics
- Gathering and implementation of requirements in the data analytics area from internal business units
- Identification, documentation and analysis of existing as well as cross-functional processes
- Data definition, data modeling & preparation as well as source selection for merging data from differently structured data sources
- Design of reports and dashboards based on MS Power BI
- Transfer of reporting processes from existing structures to MS Power BI Premium (PPU)
- Hands-on development and implementation of analyses, reports and dashboards based on Microsoft Power BI
- Power Apps for write-back processes from Power BI Premium to Azure SQL DB
- Power BI support as part of the SAP S/4 conversion
- Cooperation with internal business units and external development partners
- Coaching/training, documentation, development processes
Michail M.
Last position:
OpenShift / Kubernetes Consultant at cloudWerkstatt
Implementation and operation of OpenShift / Kubernetes solutions for customers, focusing on aspects such as storage, virtualization, security, logging, monitoring, and high availability. Support with application containerization and modernization.
Kurt B.
Last position:
Backend / Microservices Developer, DevOps, Test Automation at Fa. RCA, Rail Cargo Austria AG
- Backend / Microservices Developer, DevOps, Test Automation
- ~100 Developers, ~10 Teams, per Team: 1 PO, 1 ScrumMaster, 1UX, 1 Developers, 1 Tester
- .net core 8, 9, C#
- Microservices, Clean Architecture, MediatR, CQRS
- GraphQL, REST, SDL
- Azure DevOps, CI / CD pipelines, Azure Service Bus, Rabbit-MQ, Kafka, Azure App Configuration, Azure KeyVault, Azure Kubernetes AKS
- Splunk, dashboards, custom metrics, Elastic-Search, Kibana (ELK)
- Azure SQL Databases, Azure Cosmos DB
- Architecture decisions, event governance, COP (Backend, DevOps, FrontEnd, Test Automation)
- AI, Copilot, creating Test Templates
- Scheduler, Hangfire, Quartz
- Automated Unit and Integration Tests
- Automated E2E Tests, Playwright Test Automation, BDD, Gherkin, Cucumber
- Shipment tracking
- GIS, GPS data, geofence, geo search, position tracking, asset positions
- Jira, Confluence
- Focus on high-performance message-oriented architecture (~xx e6 messages / month / service)
- Structured logging, Serilog, OTel, Splunk, Application Monitoring
- Integration of different position data sources (GPS-based data) into AzureDataLake
Jori M.
Last position:
Agile IT Manager Healthcare Systems at MA01 Gov. Digital City
- Responsible for managing GMP-Critical systems
- Leading team of 20 professionals
- Vendor management with €15 M annual budget
Jörg P.
Last position:
Process Manager (70%) / Business Analyst (30%) at T-Mobile Austria GmbH (Magenta)
- BSS system implementation for B2B / transformation of the central B2B system landscape
- End-to-end business responsibility for defining, structuring and prioritizing key B2B business processes as part of a complex BSS transformation.
- Work in an agile, SAFe-like setup with multiple teams involved, along with regular coordination with business, IT, solution design and architecture.
- Translation of business requirements into implementable epics, features, user stories, process models and acceptance criteria as the basis for technical implementation.
- Close collaboration with solution design and architecture to assess technical dependencies, interfaces, data flows and system impacts.
- Management of target process design as the basis for implementation in Infonova BSS.
- Interface management between business departments, IT, architecture, development and operational units, including facilitation of cross-functional workshops.
- Ensuring process consistency, governance, decision-making capability and business acceptance as part of the system implementation.
Elija L.
Last position:
Consultant at Fujitsu Deutschland Mediashop GmbH
- Supporting and helping shape the development and advancement of an enterprise-wide HUB system for integrating a wide range of Data Warehouse and BI systems, as well as data sources and applications in an international context
- Consulting and analysis in the area of enterprise-wide data and BI systems, including organizational structure, data flows, system landscapes, architecture, and strategic data integration
- Data modeling, ETL processes, reporting, and data quality management
Discover over 15,000 top freelancers
Statistics of experts using REST API
Aggregated from the professional profiles of matched freelancers.
Experience
18 years
Position duration
2.7 years
Positions per freelancer
10
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Banking and Finance, Manufacturing
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
84%
Master's degree or higher
56%
Doctorate
2%
Certifications per freelancer
3
Most common languages
English, German, Italian
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 Austria 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 Austria using REST API
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.
REST API 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 (91%)
- Banking and Finance (47%)
- Manufacturing (35%)
- Healthcare (33%)
- Transportation (33%)
- Professional Services (33%)
- Retail (33%)
- Government and Administration (27%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What REST API means
A REST API is a web interface built around resources, standard HTTP methods and stateless requests. REST, short for Representational State Transfer, commonly uses JSON to exchange data between browsers, mobile apps, services and external systems. Clear resource URLs and predictable responses make integrations easier to maintain.
What companies build
REST APIs support customer portals, mobile backends, public developer services and integrations between business systems. They expose operations such as creating orders, retrieving account data, updating inventory or cancelling subscriptions. Austria-based companies use them across manufacturing, finance, retail, logistics and public services.
- Connect web and mobile applications to business data
- Integrate payment, identity, CRM and ERP services
- Expose reliable data for partners and internal teams
Ecosystem and tooling
Strong REST API work spans HTTP, JSON, authentication and data modelling. Professionals often use OpenAPI for contract documentation, OAuth 2.0 or JWT for access control, and tools such as Postman for validation. Frameworks may include Spring Boot, ASP.NET Core, Express or FastAPI, depending on the wider stack.
When freelance expertise helps
Companies bring in freelance specialists when a new interface must be designed quickly, an older service needs stabilising or several systems need a consistent contract. External expertise is also useful for versioning, performance bottlenecks, test coverage and an API gateway rollout. Remote collaboration works well when requirements, environments and ownership are documented clearly.
- Replace inconsistent endpoints with a coherent resource model
- Prepare an API for external partners or a growing product
- Review security, validation, monitoring and error handling
What strong professionals deliver
Experienced REST API professionals start with consumer needs and business rules rather than isolated endpoints. They define useful status codes, validation rules, pagination, filtering and error responses, then cover the contract with automated tests. They also consider backward compatibility, observability, rate limiting and secure handling of personal data.
How to assess the work
Ask for examples of API contracts, integration decisions and production incidents they have handled. A quality review should examine naming consistency, authentication flows, idempotency, documentation and testability. For Austrian teams, agree early on communication language, working hours and whether workshops require occasional on-site collaboration.
Frequently asked questions
The facts hiring teams ask for most often when it comes to REST API.
A REST API lets software systems exchange data and trigger actions over HTTP. Companies use RESTful APIs for web and mobile backends, partner integrations, internal services and access to business data.
REST API design usually exposes resources through predictable URLs and HTTP methods, while GraphQL lets consumers shape a query response and SOAP relies on a formal XML messaging standard. The right choice depends on client flexibility, existing systems, governance and integration requirements.
A strong REST API specialist should understand HTTP, JSON, relational or document databases, authentication and automated testing. OpenAPI, OAuth 2.0, API gateways, cloud deployment and observability are also valuable when the interface runs in production.
The required experience for a REST API project depends on its risk and scope, not only on endpoint count. A simple internal interface may need focused implementation skills, while a public service requires sound decisions on security, versioning, reliability, documentation and compatibility.
Yes, REST API work is often suitable for remote collaboration because contracts, repositories, test environments and review processes are digital. Define access rights, meeting windows, documentation standards and the expected use of English or German before work begins; occasional on-site sessions may help with complex Austrian business processes.
Review a REST API for clear resource naming, correct HTTP semantics, consistent errors, secure authentication and useful documentation. Ask how the specialist handles backward compatibility, automated contract tests, monitoring, rate limits and sensitive data.
Bring in a REST API freelancer when integrations are blocking delivery, existing interfaces are inconsistent or a team needs an independent design review. Specialist support can cover discovery, contract design, implementation, testing, documentation and handover without taking ownership away from the internal team.
A REST API professional may deliver an OpenAPI specification, implemented endpoints, authentication flows, validation, automated tests and integration documentation. Depending on the project, the handover can also include deployment configuration, monitoring guidance, migration steps and a versioning plan.
The average hourly rate of freelancers in Austria who have used REST API in their recent projects is 98 €, which corresponds to a daily rate of about 787 € based on an 8-hour working day.
Of the freelancers in Austria who have used REST API in their recent projects, 84% hold at least a Bachelor's degree, 56% hold at least a Master's degree, and 2% hold a doctorate.
On average, freelancers in Austria who have used REST API in their recent projects have 18 years of professional experience, with a single engagement typically lasting around 2.7 years.
The most common languages among freelancers in Austria who have used REST API in their recent projects are English (100%), German (98%), and Italian (16%).
The most common industries among freelancers in Austria who have used REST API in their recent projects are Information Technology (91%), Banking and Finance (47%), and Manufacturing (35%).
The most common business areas among freelancers in Austria who have used REST API in their recent projects are Information Technology (100%), Product Development (89%), and Project Management (53%).
Main locations of FRATCH Experts, who have recently used REST API
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.
Vienna 
Graz Countries:
- Germany
- Austria
- Switzerland
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