REST API Experts in Graz
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Meet FRATCH Experts in Graz, 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
Karl F.
Last position:
Managing Director at ONECEPT GmbH
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
Namik D.
Last position:
Test Manager / Test Automation Engineer at Sky Deutschland GmbH
- Implemented and maintained 443 automated test cases with a 99% pass rate (441/443)
- Enabled CI for test automation: automated runs on review/merge, reporting via Xray
- Introduced accessibility and performance checks and established them in reporting
- Served as QA lead in daily operations with stand-ups, Kanban progress tracking, prioritization, and targeted task distribution
- Handled defect triage and stakeholder communication with daily triage, QA status analysis, and actionable recommendations
- Developed and maintained a stable regression suite for CRM/Salesforce flows (UI/E2E and near-API validations)
- Integrated CI/CD using Jenkins pipelines with Groovy (IaC)
- Maintained QA documentation, test conventions, and processes in Confluence, aligned across the team
- Conducted Salesforce Einstein chatbot testing with intent/topic validation and output checks, and used Robot Framework/Python suites for continuous quality monitoring
- Technology stack: Jira, Xray, Confluence, Jenkins, Groovy, Git, Java, Selenium, Playwright, Cucumber, TypeScript, Postman, REST, Salesforce, Google Cloud, Lighthouse, Evinced, Scrum/Kanban, BDD (Gherkin)
Ben R.
Last position:
Senior iOS Developer at tado° App
- Foundational work for new hardware series “tado° line X”
- Interview & onboard new iOS Engineers
- Reduce release time from 1 in 2 months to 1 per week
- Maintain and improve high user satisfaction: 4.6+ Stars
- Setup secure & encrypted Handshake with bluetooth device
- Reduce merge conflicts by setting up the project via tuist
- Convert monolithic codebase to Modules by leveraging SPM
- Use state of the art technology, like Codable & async/await
- Maintain & improve custom view accessibility
- Reduce tech debt
- Gradually convert to webviews while maintaining high quality
- Ship highly requested features like “dark mode”
- Increase unit test code coverage and rewrite parts of code base
Elija L.
Last position:
Consultant at Fujitsu Deutschland Mediashop GmbH
- Support and co-design of the development and evolution of an enterprise-wide HUB system for integrating various 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
Martin H.
Last position:
Software Development & IT-Consulting at Self-Employed
Tech stack: Flutter/Dart, Unity3D, React, NextJS, JavaScript, TypeScript, HTML, CSS, SASS, SCSS, Tailwind, Bootstrap, Ollama, llama.cpp, LangChain, MCP, RAG, n8n, Node-Red, PlatformIO, Arduino, ESP, C, C++, Python/Django, NodeJS, C#, .NET, PostgreSQL, MySQL, MS-SQL, MongoDB, AWS, Azure, GCP, GitHub Actions, GitLab CI, Azure Pipelines, Ansible, Terraform, Docker, Postman, REST, WebSocket, Figma, Penpot, Adobe Illustrator, Adobe InDesign, VS Code, Android Studio, Visual Studio, Unity3D, Jira, Confluence, Traefik, Rclone, Authentik, pfSense, Cloudflare, Proxmox, MQTT
Previous projects:
n8n automation that reads incoming emails from an Office mailbox and routes them to stakeholders
FastMCP 2 server exposing internal services via REST API to an LLM
Terraform migration of cloud infrastructure with Azure VMs, network, blob, storage and cloud-init
Azure Pipelines for automated testing, deployment, and artifact management
Terraform, Ansible, Cloudflare Tunnel integration with Docker container provisioning and backups
GitHub Actions CI/CD for Flutter app builds, testing, automated screenshots, and App Store deployment
Flutter app with SSO, local database, backend integration, BLE synchronization
GCP setup with Cloud DNS, App Engine, Cloud SQL
AWS environment with EC2, S3, Route 53, ECS
Workshops delivered on Docker, Git, Terraform, Ansible, Cloudflare, DevOps, modern software development practices
Backend development with Python Django REST Framework, PostgreSQL, MQTT
SSO identity provider with OIDC, OAuth, LDAP, Cloudflare Tunnels, Authentik
Discover over 15,000 top freelancers
Statistics of experts using REST API
Aggregated from the professional profiles of matched freelancers.
Experience
13 years (Austria: 18 years)
Position duration
2.5 years (Austria: 2.7 years)
Positions per freelancer
10
Top business areas
Information Technology, Product Development, Marketing
Top industries
Information Technology, Education, Automotive
Certification focus areas
Information Technology, Business Intelligence, Legal
Bachelor's degree or higher
100% (Austria: 84%)
Master's degree or higher
100% (Austria: 53%)
Certifications per freelancer
4 (Austria: 3)
Most common languages
German, English, Italian
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 Graz 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 Graz 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 16 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 (100%)
- Education (57%)
- Automotive (43%)
- Energy (43%)
- Banking and Finance (43%)
- Healthcare (43%)
- Media and Entertainment (43%)
- Professional Services (43%)
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. It lets applications exchange structured data, commonly JSON, without sharing the internal logic of each system. RESTful API is the common alternative term, while Representational State Transfer describes the architectural style behind it.
What it builds
REST APIs connect customer portals, mobile applications, SaaS products and internal services. They expose consistent operations for reading, creating, updating and deleting data while keeping clients and back-end systems independent.
- Mobile and web application back ends
- Partner and payment integrations
- Product, order and customer services
- Data access for internal tools
Ecosystem and tooling
Strong REST API work spans HTTP, JSON, authentication and data modeling. Specialists often use OpenAPI or Swagger for contracts and documentation, Postman for request testing, and tools such as OAuth 2.0, JWT, Docker and CI pipelines around delivery. Experience with databases, message queues and cloud services adds practical depth.
When companies need specialists
Companies bring in freelance REST API experts when a new service must integrate with existing systems, when an interface has become inconsistent, or when performance and security need a focused review. In Graz, local teams can combine on-site workshops with remote implementation, depending on access and collaboration needs.
- Define resources, endpoints and response formats
- Replace fragile point-to-point integrations
- Introduce versioning and backward compatibility
- Review access control, validation and error handling
What quality looks like
A capable professional treats the API contract as a product used by other teams. They choose clear resource names, consistent status codes and predictable errors, then protect sensitive operations with suitable authentication, authorization and rate controls. Good documentation includes examples, edge cases and change rules.
Working with REST API experts
Project scope matters more than a generic technology label. Ask for evidence of similar integrations, well-defined API contracts and tests covering normal and failure paths. For remote collaboration, agree on documentation standards, review routines and language expectations early; Graz-based professionals may also support workshops in person when useful.
Frequently asked questions
Curious about REST API? Here are the answers that come up again and again.
A REST API lets separate applications exchange data and trigger actions over HTTP. Companies use RESTful APIs for mobile apps, web front ends, partner integrations, internal services and access to business data.
A REST API uses resource-oriented endpoints and standard HTTP behavior, making it familiar and straightforward to cache and document. GraphQL gives clients more control over returned fields, while SOAP relies on stricter messaging standards and is still relevant in some enterprise environments.
A REST API specialist should understand HTTP, JSON, authentication, authorization, databases and automated testing. OpenAPI, Swagger, Postman, OAuth 2.0, JWT, containerization and cloud deployment are also useful depending on the system.
A REST API freelancer should show work comparable to the scope, such as a single integration, a public interface or a service used by several clients. More complex projects call for evidence of versioning, observability, security reviews, performance testing and reliable change management.
A REST API project is often suitable for remote collaboration because contracts, code reviews, tests and documentation can be shared online. On-site sessions in Graz can still help with domain workshops, integration planning or access to sensitive internal systems.
A REST API should have clear resources, consistent status codes, useful errors, secure access controls and documentation that another team can follow. Review automated tests, backward-compatibility decisions, monitoring, validation and examples rather than judging the interface by endpoint count.
A RESTful API contract normally defines resources, paths, methods, parameters, request and response schemas, authentication rules and error behavior. OpenAPI can turn these decisions into documentation, validation and client-generation support.
A REST API freelancer should clarify the consumers, data ownership, security requirements, expected traffic, existing conventions and compatibility constraints. They should also agree on environments, test data, review ownership, release steps and how changes will be communicated.
The average hourly rate of freelancers in Graz, Austria who have used REST API in their recent projects is 111 €, which corresponds to a daily rate of about 890 € based on an 8-hour working day.
Of the freelancers in Graz, Austria who have used REST API in their recent projects, 100% hold at least a Bachelor's degree and 100% hold at least a Master's degree.
On average, freelancers in Graz, Austria who have used REST API in their recent projects have 13 years of professional experience, with a single engagement typically lasting around 2.5 years.
The most common languages among freelancers in Graz, Austria who have used REST API in their recent projects are German (100%), English (100%), and Italian (43%).
The most common industries among freelancers in Graz, Austria who have used REST API in their recent projects are Information Technology (100%), Education (57%), and Automotive (43%).
The most common business areas among freelancers in Graz, Austria who have used REST API in their recent projects are Information Technology (100%), Product Development (86%), and Marketing (57%).
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 
Vienna Countries:
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