OAuth Experts in Stuttgart
matched in minutes from over 15,000 CVsHire experts who design secure authorization flows, connect identity providers, and integrate OAuth with APIs, OpenID Connect, and cloud applications. FRATCH matches you quickly and precisely with vetted, available freelancers for your project.
Meet FRATCH Experts in Stuttgart, who have recently used OAuth
Sercan T.
Last position:
Co-Founder & Lead Software Architect at Pflege-Pfad
- Focus: System architecture, cloud-native platforms, microservices, API design
- Product: Pflege-Pfad is a digital placement platform that directly connects relatives of people in need of care with verified care services and caregivers – without an agency and without ongoing fees.
- Business analysis & process design:
- Analysis of the German care market and identification of the key pain points of both target groups.
- Modeling of core business processes: registration, verification, care request, application, placement, and rating.
- Definition of the business model as a freemium/premium model with optional contact unlocking.
- Creation of user stories and requirements documentation for relatives, care services, and administrators.
- Design of trust and quality assurance mechanisms with document upload, admin review process, and rating system.
- Coordination with stakeholders and validation of product decisions with potential users.
- Technical implementation:
- Design and implementation of the entire platform architecture as the sole developer.
- Design and implementation of a REST API with Spring Boot and Kotlin, including JWT-based authentication.
- Development of the frontend as a single-page application with Angular 17.
- Implementation of the AWS infrastructure with EC2, RDS PostgreSQL, S3, CloudFront, and IAM.
- Document upload with AWS S3 using presigned URLs to verify care services.
- Email notifications via Resend API.
- AI-supported care service search via OpenAI API.
- Implementation of complete user flows such as registration, login, password reset, and the placement process.
- Development of an admin panel for user and care service management as well as analytics.
- CI/CD with GitHub Actions and containerized deployments with Docker.
- End-to-end tests with Playwright.
Technologies: Kotlin, Spring Boot 3, Spring Security, JWT, JPA/Hibernate, PostgreSQL, Angular 17, TypeScript, RxJS, AWS (EC2, ECS, S3, CloudFront CDN, RDS PostgreSQL, IAM), nginx, GitHub Actions, Playwright, Maven, Git, OpenAI API, Resend API, Docker, Scrum, i18n (DE/EN/TR), Kiro, feature flag architecture.
Will O.
Last position:
Solution Architect at Polizei Behörde Stuttgart
Designed a migration strategy for WLS applications to BKA Cloud and Stack IT
Created a hybrid cloud for internal testing and development with Kubernetes
Transformed the IT landscape from an outdated monolithic architecture to a cloud-based architecture
Integrated new CI/CD processes using Azure Pipelines
Quadrupled the processing throughput for personnel security checks
Migrated personnel security screening applications to Docker-based applications
Implemented CI/deployment pipelines using Azure DevOps
Environment: Java Springboot, Kubernetes, Oracle Weblogic, OpenID, Camunda, JUnit, TOGAF
Lothar H.
Last position:
Solution Manager for the investigation PoC and exchange and refinement of an existing cloud and IoT power plant control system at Shell AG and NEXT Kraftwerke GmbH
- Investigation PoC and exchange and refinement of an existing cloud and IoT power plant control solution for certificate management of renewable energy power plants (solar, wind, biomass and others) of the largest European renewable energy power plant operator in this field, including investigation of the IoT devices used in the field and their integration and network connection with the aim of automated PKI key management.
- Messaging with Kubernetes for large API-connected enterprise applications
- Risk and Attack Vector Analysis, Software Quality & Bug Assessments
- Agile Workload Scheduling via Jira & ConJluence
- Evaluation of message streams Pub/Sub for MQ and KaJka.
- Various tests with “best design approaches” regarding resilience patterns such as Circuit Breaker Designs, Throughput Measurement and Monitoring, Bulkhead Governors - for robust EA design
- Integration of API Management with IBMs API Connect to Kubernetes - for agnostic Microservices API Management Designs. Google Apigee
- Solution Health Check Approaches for Load Burst Situations + Remedy
- Research and investigation of available potential subcontractors in the coordinating role as Solution Manager. CIS20 Controls.
- Dread and Stride Security Assessments.
Benjamin S.
Last position:
Design and implementation of a new cloud service at Porsche AG
- Design of a new cloud service
- Requirements Engineering
- API Design (REST API, Kafka)
- Consulting on architecture, feasibility and effort estimation
- Implementation of a microservice architecture
- Implementation of a Spring Boot web service
- Development of REST APIs including business and persistence logic
- Kafka consumers and producers
- Various Excel upload/download scenarios
- Change Data Capture
- Cloud provisioning with IaC/Terraform
- Go-live with 30,000 users
- Operation, support and bug fixing for other services
Environment/tools: GitLab, JIRA, Confluence, IntelliJ, Spring Boot, Java, Docker, Terraform, AWS ECS, Postgres, Apache Kafka, SAP Datasphere, JUnit, Debezium, Apache POI, Hibernate, JPA, Testcontainers
Achille C.
Last position:
Backend/Frontend Developer at ITZ-Bund
Development of a microservice application for calculating postings on accounts
Development of backend components with Java or JEE, Quarkus, Kafka, Rest API
Development of the test component with mocking frameworks (Mockito)
Development of integration test components
Creation of OpenAPI specification format
Configuration of CI/CD pipeline
Development of frontend components with React
Design, further development and optimization of system structures
Code review
Java Corretto 21, JEE, Quarkus, Golang
Reactive programming with Spring WebFlux, Project Reactor
Git, Azure DevOps for CI/CD pipeline, YAML, Json Swagger UI, Postman, Rest OpenAPI, Kafka Streams, Kafka Connect, Log4J
Microservices, Jira, Confluence, MySQL, Docker, Kubernetes (deployment via Helm charts)
Spring Security, OAuth 2, JWT, Sonarqube
IntelliJ, Maven, logging framework Splunk, Agile method Scrum, Nexus, Vaadin V24, build tool Vite
React, React.JS, Node.js, Jess/JavaScript, Tailwind CSS, Agile method Scrum, accessibility BITV, Playwright
Marcel S.
Last position:
Technical Lead / Lead Developer at REWE digital
- Due to an organizational restructuring towards product-based teams, the implementation of a Data Mesh in the area of Digital Supplier Management (DSM) was decided.
- A highly available real-time Data Mesh for providing large volumes of data via Kafka and REST to other products.
- New development of a core supplier management software in a (micro-)service-based architecture with a modern tech stack.
- Technologies/Tools:
- Java 21
- Spring Boot
- Angular
- TypeScript
- Go
- MapR
- Kafka
- Docker
- Google Cloud Platform (GCP)
- Kubernetes
- Helm
- GitLab CI
- Maven
- JUnit
- Mockito
- WireMock
- Cypress
- Keycloak
- OAuth 2.0 & OpenID Connect
- Humio
- Nexus
- Artifactory
- SonarQube
- Renovate
- Git
- Postman
- IntelliJ
Discover over 15,000 top freelancers
Statistics of experts using OAuth
Aggregated from the professional profiles of matched freelancers.
Experience
18 years (Germany: 19 years)
Position duration
1 year (Germany: 1.8 years)
Positions per freelancer
19 (Germany: 14)
Top business areas
Information Technology, Operations, Product Development
Top industries
Automotive, Banking and Finance, Information Technology
Certification focus areas
Information Technology, Operations
Bachelor's degree or higher
100% (Germany: 87%)
Master's degree or higher
50% (Germany: 51%)
Certifications per freelancer
1 (Germany: 2)
Most common languages
German, English, Spanish
Speak two or more languages
100% (Germany: 97%)
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 Stuttgart 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 Stuttgart using OAuth
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.
OAuth experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Automotive (100%)
- Banking and Finance (83%)
- Information Technology (83%)
- Government and Administration (83%)
- Transportation (67%)
- Insurance (50%)
- Manufacturing (50%)
- Retail (50%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What OAuth does
OAuth is an authorization framework that lets an application access protected resources without handling the user’s password. It is used for delegated access, single sign-on integrations, API authorization, and connections between services. The current standard is OAuth 2.0, with OAuth 2.1 consolidating recommended security practices.
Core flows
OAuth uses roles such as the resource owner, client, authorization server, and resource server. Experts select a suitable flow, usually Authorization Code with PKCE for user-facing applications or Client Credentials for service-to-service access. They define scopes, redirect URIs, consent screens, token lifetimes, and refresh behavior with care.
Ecosystem and tools
OAuth commonly works alongside OpenID Connect, which adds identity information and authentication to the authorization layer. Projects may integrate Keycloak, Auth0, Microsoft Entra ID, Okta, Amazon Cognito, Google Identity, or a custom authorization server. Strong specialists also work with JWT validation, JWKS, TLS, API gateways, and secrets management.
Typical deliveries
- Authorization Code and PKCE flows for web and mobile applications
- Client Credentials integrations for internal and external APIs
- Federation with enterprise identity providers and OpenID Connect
- Scope models, consent journeys, token policies, and revocation
- Migration from implicit or password-based flows to safer patterns
These deliverables support customer portals, partner APIs, SaaS products, mobile applications, and distributed services. In Stuttgart, OAuth expertise is relevant to connected manufacturing, mobility, software, and enterprise systems that exchange data across organizational boundaries.
When to bring in experts
Companies often need freelance expertise when an integration must meet strict security requirements, when several identity providers must work together, or when an existing token design has become difficult to maintain. Warning signs include overly broad scopes, long-lived access tokens, inconsistent claims, redirect errors, weak client storage, and unclear ownership of authorization decisions. Remote collaboration works well when access, test environments, and security contacts are organized; on-site workshops can help with complex enterprise integrations in Stuttgart.
What quality looks like
A strong OAuth professional starts with threat modeling and clear access requirements rather than copying a flow from a library. They distinguish authentication from authorization, validate issuer and audience claims, protect redirect endpoints, handle token rotation, and document scopes and failure paths. They test consent, expiry, replay, revocation, and provider-specific behavior, then leave maintainable integration code, configuration, and runbooks for the internal team.
Frequently asked questions
Questions about OAuth? Start with the answers below.
OAuth lets an application obtain limited access to a user’s or service’s protected resources without receiving the account password. Companies use it for API access, delegated permissions, sign-in integrations, and communication between trusted services.
OAuth is primarily an authorization framework: it describes what an application may access. OpenID Connect builds on OAuth 2.0 to provide an identity layer, including an ID token and standardized user information.
A strong OAuth specialist should understand OpenID Connect, JWT and JWKS validation, API security, TLS, secure secret storage, and identity-provider configuration. Experience with Keycloak, Auth0, Microsoft Entra ID, or another relevant provider is useful when the project depends on a specific ecosystem.
A small, well-documented provider integration may need focused OAuth experience for design review and implementation. A project involving several tenants, identity providers, APIs, or legacy flows benefits from a professional who can model threats, define permissions, and test the complete authorization lifecycle.
OAuth work is usually suitable for remote collaboration because configuration, code review, and testing can happen through secured environments. On-site sessions in Stuttgart can be valuable for workshops with security, product, and infrastructure teams, especially when enterprise access rules are complex.
Ask the OAuth specialist to explain the chosen flow, threat model, scopes, token lifetime, redirect protection, and revocation strategy in plain language. Review whether the implementation separates authentication from authorization and includes tests for expiry, invalid claims, replay, and provider failure.
OAuth is usually stronger than API keys when access must be delegated, scoped, rotated, or tied to a user or service identity. API keys can suit simple server-to-server cases, but they provide less structure for consent, limited permissions, and token lifecycle management.
Before starting OAuth work, clarify the actors, protected resources, identity providers, client types, required scopes, and compliance constraints. Professionals should also confirm who owns secrets, redirect domains, token policies, test accounts, and production incident response.
The average hourly rate of freelancers in Stuttgart, Germany who have used OAuth in their recent projects is 104 €, which corresponds to a daily rate of about 834 € based on an 8-hour working day.
Of the freelancers in Stuttgart, Germany who have used OAuth in their recent projects, 100% hold at least a Bachelor's degree and 50% hold at least a Master's degree.
On average, freelancers in Stuttgart, Germany who have used OAuth in their recent projects have 18 years of professional experience, with a single engagement typically lasting around 1 year.
The most common languages among freelancers in Stuttgart, Germany who have used OAuth in their recent projects are German (100%), English (100%), and Spanish (50%).
The most common industries among freelancers in Stuttgart, Germany who have used OAuth in their recent projects are Automotive (100%), Banking and Finance (83%), and Information Technology (83%).
The most common business areas among freelancers in Stuttgart, Germany who have used OAuth in their recent projects are Information Technology (100%), Operations (83%), and Product Development (83%).
Main locations of FRATCH Experts, who have recently used OAuth
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 
Dusseldorf 
Dortmund Countries:
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