OpenAPI Experts in Austria
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Meet FRATCH Experts in Austria, who have recently used OpenAPI
Namik Delilovic
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)
Joseph Wagner
Last position:
Freelancer Cloud / Solution Architect (AWS) at A1 Bank
- I am responsible for providing solution architecture and technical assistance for a migration initiative aimed at transitioning to a new core banking system.
- The project involves replacing in-house development with a commercially available off-the-shelf core banking system operated as SaaS on AWS.
- Duties encompass solution design, technical coordination, supporting development teams, and providing IT support and troubleshooting.
- Managing over 10 global vendors and partners is crucial to project success.
- Technologies: VMWare ESXi, AWS, EKS Kubernetes, Mastercard Payment Transaction Service, Avaloq, A1 Telekom Austria infrastructure, CheckPoint FW, F5, Site-to-Site VPNs, PingID, Futurae SDK, Airlock, UC4/Automic, Firebase, iOS/Android lifecycle management, AWS IAM, AWS AppStream, AWS S3, AWS Transfer Family, QlikView, OpenAPI.
Maximilian Aster
Last position:
Technical Project Lead / Solution Architect at UNIQA Insurance Group
- Planning, monitoring, coordination, and documentation of the output project as part of the policy migration to the UNIQA Insurance Platform.
- Planning and design of new requirements.
- Designing a consistent, maintainable, and scalable application architecture.
Kurt Blumenschein
Last position:
Backend / Microservice Developer, DevOps, Test Automation at RCA, Rail Cargo Austria AG
- Backend / Microservice Developer, DevOps, Test Automation
- ~100 Devs, ~10 Teams, per team: 1 PO, 1 Scrum Master, 1 UX, 1 Developer, 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, FrontEnt, Test Automations)
- AI, Copilot, creating test templates
- Scheduler, Hangfire, Quartz
- Automated unit and integration tests
- Automated E2E tests, Playwright test automation, BDD, Gherkin, Cucumber
- Tracking of shipments
- GIS, GPS data, geofence, geo search, position tracking, asset positions
- Jira, Confluence
- Focus on high-performance message-oriented architecture (~xx million messages per month per service)
- Structured logging, Serilog, OTel, Splunk, Application Monitoring
- Integration of different position data sources (GPS-based data) into Azure Data Lake
Jaroslav Abraham
Last position:
Child care, personal development and learning
Christian Hutzinger
Last position:
Senior Full Stack Developer at Adria Magazin GmbH
Jesolo Tickets – Booking platform for tickets
Concept and implementation of a multi-tenant booking platform for the online sale of bus and ferry tickets in the Jesolo region (Northern Italy). Travel agencies and event organizers embed a customizable booking widget on their own websites; travelers check live availability, book multiple passengers, and pay online in just a few clicks.
- Real-time booking: Schedules and prices come live via the transport providers' API; after payment, the tickets are automatically delivered as QR-coded PDFs – with no manual issuance.
- Provider architecture: New providers can be onboarded without code changes; an origin-based multi-tenant model with its own domain and payment configuration for each partner site makes the platform grow with every customer.
- Clean architecture: 3-tier structure (handlers → services → data store) with caching – availability checks stay fast and maintainable even with many parallel requests.
Tech stack: Go, Echo, PostgreSQL (pgx), Stripe, Web Components, Tailwind CSS, esbuild, Docker, GitLab CI, Hetzner VPS
Discover over 15,000 top freelancers
Statistics of experts using OpenAPI
Aggregated from the professional profiles of matched freelancers.
Experience
22 years
Position duration
3 years
Positions per freelancer
10
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Insurance, Transportation
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
75%
Master's degree or higher
75%
Certifications per freelancer
3
Most common languages
German, English, Bosnian
Speak two or more languages
100%
Based on our profile pool as of 30 Aug 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Austria 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 Austria using OpenAPI
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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
API contracts
OpenAPI is the standard way to describe REST APIs in a machine-readable form. It helps teams define endpoints, request and response schemas, auth, and error handling before implementation starts.
What it supports
- API design and contract-first work
- Swagger UI documentation
- Client SDK generation
- Mock servers and early testing
- Versioned API change management
Tooling and formats
The ecosystem often includes OpenAPI 3.0 and OpenAPI 3.1, plus tools such as Swagger Editor, Swagger UI, and code generators. Strong specialists know how to keep specs consistent across YAML and JSON and how to align them with backend services.
Why companies bring in help
Teams often need freelance expertise when an API grows fast, the documentation has drifted from the code, or multiple services must follow the same contract. In Austria, this is common in fintech, industry software, travel, and public-facing digital services.
What good specialists do
Good professionals write specs that are clear, complete, and easy to maintain. They think about reuse, naming, security schemes, pagination, error models, and backward compatibility, not just basic endpoint lists.
Delivery and collaboration
- Review existing Swagger files and clean up gaps
- Create new API definitions from business requirements
- Sync specs with backend and frontend teams
- Support remote work or on-site workshops in Austria
- Improve handover quality for internal teams and partners
Frequently asked questions
Curious about OpenAPI? Here are the answers that come up again and again.
OpenAPI is used to describe REST APIs in a standard format so teams can design, document, test, and share them clearly. It is common for public APIs, internal service contracts, and integration work where frontend, backend, and partner teams need the same source of truth.
OpenAPI is the specification; Swagger is the older name many people still use for the surrounding toolset and the spec itself. In practice, searchers may mean OpenAPI 3.x, Swagger Editor, or Swagger UI when they ask for Swagger experience.
Hire a specialist when your API documentation is inconsistent, your endpoints keep changing, or teams need a contract-first process. It also helps when you need better request and response models, reusable schemas, or cleaner handoff between product and engineering.
A strong OpenAPI professional usually knows REST design, YAML or JSON, authentication schemes, schema design, and API versioning. Adjacent skills often include Swagger UI, code generation, testing tools, and practical knowledge of how client teams consume the spec.
Smaller documentation fixes can be handled by someone with focused specification experience, while larger API programs need a specialist who can shape standards across many services. The right level depends on whether you need a single cleaned-up spec or a full API governance approach.
Yes. OpenAPI work is usually well suited to remote collaboration because the main deliverables are specs, reviews, and documentation, not location-specific hardware work. On-site sessions in Austria can still help when teams need workshops for naming, security, or contract alignment.
A good deliverable is complete, consistent, and easy for other specialists to use without guesswork. Check whether paths, schemas, errors, auth, examples, and versioning are handled clearly, and whether the spec matches the actual API behavior.
OpenAPI is the most widely used option for describing REST APIs and has a large tool ecosystem around documentation and code generation. API Blueprint and RAML can fit some workflows, but many teams prefer OpenAPI because it is broadly supported by tools, teams, and integration partners.
The average hourly rate of freelancers in Austria who have used OpenAPI 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 Austria who have used OpenAPI in their recent projects, 75% hold at least a Bachelor's degree and 75% hold at least a Master's degree.
On average, freelancers in Austria who have used OpenAPI in their recent projects have 22 years of professional experience, with a single engagement typically lasting around 3 years.
The most common languages among freelancers in Austria who have used OpenAPI in their recent projects are German (100%), English (100%), and Bosnian (17%).
The most common industries among freelancers in Austria who have used OpenAPI in their recent projects are Information Technology (100%), Insurance (50%), and Transportation (50%).
The most common business areas among freelancers in Austria who have used OpenAPI in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (67%).
Main locations of FRATCH Experts, who have recently used OpenAPI
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
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Philipp Thomaschewski
FRATCH CEO
