Swagger Experts in Frankfurt
in minutes from over 15,000 CVs with the power of AIHire experts who design Swagger specs, maintain OpenAPI documentation, and work with Swagger UI, Swagger Editor, and code generation for API-first projects. Get fast, precise matching with vetted, available freelancers.
Meet FRATCH Experts in Frankfurt, who have recently used Swagger
Uday Vanaparthy
Last position:
Full Stack JAVA Developer & DevOps Engineer at Deutsche Börse (DBAG)
Project: SCS (Settlement / Clearing Services)
Settlement platform serving multiple trading and clearing venues — counterparty risk safeguarding, settlement volume reduction, central risk management, and post-trade anonymity.
Technologies: Java 17, Spring Boot 3, Microservices, Spring Data JPA, SonarQube, Fortify (SCST), Mockito, Jenkins, OpenShift, Maven, Podman, GitHub, JIRA, Liquibase, Swagger, AMQP, Apache Camel, Terraform, PostgreSQL, Instana, Graylog.
- Identified and remediated CVEs in third-party libraries using SCA tooling, strengthening the security posture of production components.
- Maintained 90% code coverage with SonarQube, improving code quality and reducing production defects.
- Built and customized Helm charts and values.yaml configurations across 3 environments (ACT, SIMU, PROD), increasing deployment flexibility and consistency.
- Enabled mTLS for database authentication and message broker connections, enforcing encrypted, certificate-validated communication.
- Designed and deployed microservices with asynchronous, REST-based communication between components.
- Automated build and continuous integration pipelines using Maven and Jenkins.
- Used Podman and OpenShift for container orchestration and Liquibase for database version control.
- Optimized Java code and implemented EHCache-based caching, improving application performance.
- Managed application images, JAR versions, and dependencies via DBAG Artifactory Repository Manager.
Minh Doan
Last position:
Project Manager / Business Analyst / Application Manager at Finance and Insurance
Introducing 5 different process applications for various teams
Release planning: scope and time management
Resource/capacity planning
Conducting sprint planning / retrospectives
Increment planning (multiple sprints)
Preparing steering committee meetings / reporting to the executive board
Coordinating / aligning with external suppliers / deliveries
Multi-project resource planning
Aligning with the business unit and development team
Identifying best practices with IBM BAW
Cost control and planning for the project team and external service providers
Collecting KPIs using LogScale
Analyzing application errors with LogScale / queries
Defining user stories / aligning requirements with the business unit and development team
Testing and defect tracking
UI/UX design of the application
Preparing and facilitating brown-paper workshop
Test concept, test data, test organization, test execution
Recording team velocity / metrics
Executing tests
Scripts for automated testing
Organizing tests with the business unit and IT
Recording and prioritizing defects
Setting up and operating the application
Setting up application monitoring with LogScale dashboards
Checking health endpoints with PowerShell
Post mortem analysis
Setting up incident management
Setting up problem management
Analyzing errors using LogScale queries and dashboard
Pre-processing data for AI
Conducting evaluation with AI language models (Meta Llama 3.3 LLM and deepset Haystack) and RAG
Installing runtime environments for LLMs (large language model)
Evaluating various LLMs
Installing RAG (retrieval augmented generation) and integrating with LLM
Extracting unstructured data with LLM and RAG
Project based on IBM BAW (Business Automation Workflow), WebSphere Liberty, Domea, d.3, REST, LogScale (formerly Humio), Swagger, PowerShell, JIRA, Confluence, Lucom Interaction Platform (LIP), Mattermost, Jabber
Ingo Dettling
Last position:
Analytics at BaFin - Federal Financial Supervisory Authority Frankfurt
- Introduction of methods for developing and automated deployment of cloud-native software and machine learning applications in OpenShift clusters
- Development of various programs in Python
- Technologies: Kubernetes, OpenShift, Kustomize, ArgoCD, Tekton, Docker, PodMan, Airflow, IntelliJ, PyCharm, Git, Bitbucket, Jira, Confluence, Python
Werner Keil
Last position:
Test Coordinator, Designer and Engineer at IBM
- Testing the SekIDP and related components
- Test design, execution and automation, microservices, GitHub Enterprise, Eclipse, Katalon Test Platform, API Testing, Confluence 8, JIRA/Xray, Draw.io, Swagger/OpenAPI, Postman, Docker, Kubernetes, Podman, PuTTY, E-Health, Telematik, Gematik standards, EPA, E-Rezept, sektoraler IDP, encryption, XaDES, PaDES, DICOM, HL7, FHIR, IHE, ICD, SSO, SAML/Shibboleth, OAuth, smartcards, JWT, two factor authentication Android and iOS, Wireshark, BrowserStack, Cypress, gRPC, REST, SOAP, WS-Security, Linux Shell, PowerShell, SSH/SSL, Java, Kotlin, Cordova, Gradle, Groovy, Python, TypeScript
Alexey Lysenkov
Last position:
Frontend Styler at Finanz Informatik
- Implementation of business transaction layouts for the online banking UI in compliance with BITV (accessibility)
- Technologies: JavaScript, jQuery, LESS
Illia S
Last position:
Front-End Developer at Tangram Internet Services GmbH
- IAUP (Interregional Academy of Personnel Management) commissioned the development of a distance learning system for its secondary school subdivision.
- Development of the website [link]
- Development of a billing system and integration with various payment systems
- Development of a distance learning system based on the open source Moodle solution
- Integration of the distance learning system into the user office on the [link] website
- Front-end: Vue.js v2, Nuxt.js, JavaScript, HTML, CSS, SCSS
- Back-end: LAMP (Linux, Apache, MySQL, PHP), PHP Framework Laravel, Redis, Swagger, MySQL 8.x, PayPal API
- DevOps: Docker, CI/CD, GIT
Leonid Ravin
Last position:
IT Business Analyst / Requirements Engineer at S-Payment GmbH / Sparkasse (DSV-Gruppe)
- Business analysis of payments for the introduction of Wero EPI in Germany.
- Analysis and optimization of merchant processes in the context of acquiring and issuing.
- Analysis of interfaces for instant payments.
- Analysis of SCT-Inst processes, settlement mechanisms and reporting processes.
- Identification and clarification of gaps in merchant processes.
- Analysis and documentation of clearing and settlement processes.
- OSPlus process analysis and documentation.
- Coordination and alignment with scheme management as well as various payment service providers and financial institutions on merchant processes.
- Preparation and follow-up as well as active participation in EPI meetings on technical coordination and regulatory topics in payments, including content familiarization and prioritization.
- Preparation and documentation of project and steering committees in the EPI environment.
- Creation of status reports for the subproject.
- Maintenance and structuring of Confluence pages for project documentation.
- Coordination and alignment with the issuing teams on individual customer processes as well as aligning with bank processes and acquirer processes in the Wero environment.
- Communication with payment service providers regarding merchant and bank processes in the Wero environment.
- Organizational support for project management in special tasks in the EPI and Wero environment.
- Digital filing and documentation in Confluence and Microsoft Teams.
- Planning, implementation and tracking of work packages and steps.
- Quality assurance and project control.
- Consulting on IT strategy, IT architecture and interface management in the EPI and Wero environment.
- Technical environment: Jira, Confluence, XML, JSON, MS Office (Word, Excel, Teams, PowerPoint), SharePoint, Draw.io, Innovator, 3rd-level support, ITIL, creation and updating of software documentation, interface management, OSPlus, Scrum, KYC, payment, European Payments Initiative (EPI), Wero, Microsoft Loop, Instant Payments, SCT-Inst.
Jonas Walter
Last position:
Fullstack Developer at Soulven Agency
- Working for customer and internal projects ranging from B2C, B2B applications
- Development and maintenance of customer-facing and internal applications across B2C and B2B domains
- Responsibility for technical direction, architectural decisions and code quality standards
- Design and implementation of scalable application architectures, including modular frontend and service-oriented backend structures
- Conceptual planning and technical execution of the agency website relaunch in Angular
- Rapid prototyping and MVP development for B2B customer projects in the pharmaceutical sector with Vue.js
- Creation of first MVPs for 3D rendering–based products, including real-time visualization and interactive experiences
- Strong UX/UI expertise with a focus on gamification, user engagement and conversion-driven interfaces
- Close collaboration with product management, design and stakeholders to translate business requirements into technical solutions
- Agile software development using Scrum, including sprint planning, reviews and retrospectives, supported by Azure DevOps
- Full-stack development using React, Angular, TypeScript, Vue.js, HTML5, CSS3/SCSS, C#, .NET, Node.js, RESTful APIs, Unity, Azure DevOps, Git and CI/CD pipelines
Timur Yalcin
Last position:
Lead Frontend Developer | Fullstack Developer at Finanz Informatik
- Further development of an application for managing personnel changes.
- Development of frontend and backend.
- Implementation of the frontend with React and Material UI.
- Implementation of the backend with Java and Spring Boot.
- Use of React, Java, Spring, TypeScript, next.js, Material UI, Github Enterprise, Figma, Docker, Playwright, swagger, swagger UI, OpenAPI, npm, yarn, git.
Silke Daroglou
Last position:
Business Analyst at Rentenservice
Developed a digitalization strategy Analyzed legacy systems and designed a new IT landscape
- Gathered current work structures and processes
- Identified optimization opportunities
- Developed a tool landscape to support business processes
- Created a request for proposal
- Defined epics and user stories
- Modeled processes
Technologies/Methods: Confluence, MSTeams, MindManager, PlantUML, JIRA
Ralitsa Popova
Last position:
Process, Project and Requirements Manager, Client Project @ RUBINLAKE at 1&1 Versatel GmbH
- Introduction of a new workflow tool for fibre connectivity & broadband delivery
- Requirements design, estimation and prioritization
- Creation of rollout and project plans
- Managing the development team using Scrum
- Design and project management of the API interface to existing tools
- Process modeling for the new order dispatching teams (FCD & BD)
- Designing processes inside and outside the team
- Requirements design and implementation of necessary tools
- Creation and calculation of production KPIs
Discover over 15,000 top freelancers
Statistics of experts using Swagger
Aggregated from the professional profiles of matched freelancers.
Experience
20 years (Germany: 19 years)
Position duration
2.3 years (Germany: 1.7 years)
Positions per freelancer
17 (Germany: 15)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Banking and Finance, Automotive
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
88% (Germany: 89%)
Master's degree or higher
50% (Germany: 54%)
Doctorate
13% (Germany: 10%)
Certifications per freelancer
3 (Germany: 2)
Most common languages
German, English, Russian
Speak two or more languages
100% (Germany: 97%)
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 Frankfurt 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 Frankfurt using Swagger
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 design
Swagger is used to describe REST APIs in a clear, machine-readable way. Teams use it to define paths, request and response shapes, authentication, and error handling before or alongside implementation. That keeps API work readable for specialists and consistent for the rest of the team.
Common tools
Swagger work often centers on the OpenAPI workflow and the tools around it.
- Swagger UI for interactive API docs
- Swagger Editor for writing and reviewing specs
- Swagger Codegen for client and server stubs
- OpenAPI documents for shared contracts
What strong experts do
Strong Swagger professionals do more than write a spec. They keep the contract aligned with the service, make examples realistic, and spot gaps in naming, status codes, and security details. They also know when to move from Swagger-branded tools to the OpenAPI terms and formats that current teams expect.
When companies bring in help
Companies usually need freelance support when an API estate has grown messy or when a new service must be documented fast. In Frankfurt, this often comes up in banking, insurance, logistics, and SaaS teams that need clear API contracts for internal and external use.
- New API design and review
- Cleanup of outdated Swagger files
- Migration to OpenAPI-based workflows
- Documentation for partner integrations
- Support for QA and contract testing
Adjacent skills
Swagger experts often work with REST, JSON, YAML, OAuth 2.0, and contract testing. They also need to read implementation details in Java, Node.js, Python, or .NET services so the API definition matches real behavior. Good collaboration with backend specialists and QA keeps the spec useful.
What quality looks like
Good Swagger work is precise, readable, and stable. Paths are named consistently, schemas are reusable, and examples help consumers integrate without guessing. A strong specialist also knows the difference between a nice-looking document and a contract that actually guides implementation and support.
Frequently asked questions
Before you brief your next project: the most common questions about Swagger.
Swagger is used to describe and document REST APIs in a standard format. It helps teams define endpoints, request bodies, responses, authentication, and examples in one shared contract. That makes it easier for specialists on both sides of an interface to build and test against the same source of truth.
Swagger is the older name people still use for a set of API tools and for the OpenAPI workflow around them. Today, many teams say OpenAPI when they mean the specification, while Swagger often refers to tools like Swagger UI or Swagger Editor. In practice, a strong specialist should understand both terms and how they connect.
A Swagger specialist often works with Swagger UI, Swagger Editor, and sometimes Swagger Codegen. They also need to handle YAML or JSON, because those formats are common for API definitions. In many teams, the work sits next to testing, documentation review, and API governance.
A Swagger task can be simple if the API is small and the contract is already stable. It needs deeper expertise when the spec must reflect complex authentication, many response states, or an existing service that is hard to document cleanly. The more consumers depend on the API, the more valuable a careful specialist becomes.
Look at how the Swagger freelancer structures paths, schemas, examples, and error responses. Good work is consistent, easy to read, and aligned with the actual service behavior. Ask for samples that show both documentation quality and contract accuracy, not just a nice-looking UI.
Swagger is stronger when the API contract needs to stay in sync with implementation and testing. Hand-written docs can drift, while a spec-driven approach gives teams a shared definition that tools can read. It is especially useful when other specialists need generated clients, server stubs, or interactive docs.
Yes, Swagger is well suited to remote work because the spec is text-based and easy to review in version control. Teams in Frankfurt often combine on-site workshops for early API design with remote follow-up for edits, reviews, and documentation updates. Clear comments and example payloads matter even more when people are not in the same room.
A strong Swagger specialist usually understands REST design, JSON Schema concepts, authentication flows, and contract testing. They should also be able to discuss backend implementation with other specialists without turning the spec into guesswork. If the API serves external partners, experience with versioning and deprecation is a plus.
The average hourly rate of freelancers in Frankfurt, Germany who have used Swagger in their recent projects is 93 €, which corresponds to a daily rate of about 743 € based on an 8-hour working day.
Of the freelancers in Frankfurt, Germany who have used Swagger in their recent projects, 88% hold at least a Bachelor's degree, 50% hold at least a Master's degree, and 13% hold a doctorate.
On average, freelancers in Frankfurt, Germany who have used Swagger in their recent projects have 20 years of professional experience, with a single engagement typically lasting around 2.3 years.
The most common languages among freelancers in Frankfurt, Germany who have used Swagger in their recent projects are German (100%), English (100%), and Russian (36%).
The most common industries among freelancers in Frankfurt, Germany who have used Swagger in their recent projects are Information Technology (100%), Banking and Finance (73%), and Automotive (55%).
The most common business areas among freelancers in Frankfurt, Germany who have used Swagger in their recent projects are Information Technology (100%), Product Development (91%), and Project Management (82%).
Main locations of FRATCH Experts, who have recently used Swagger
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 
Berlin 
Hamburg 
Munich 
Cologne 
Dusseldorf 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
