OAuth Experts in Dusseldorf
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Meet FRATCH Experts in Dusseldorf, who have recently used OAuth
Boris Solos
Last position:
Generalist expert for software development at Mercor
- Training the AI models, evaluating images and texts for UI/UX, turning the provided data into insights via OpenAI Feather as part of the machine learning workflow
Technologies: OpenAI Feather
Thorsten Lenzen
Last position:
Senior Security Analyst
- Analysis and remediation of security vulnerabilities in a risk assessment system for energy trading
- System analysis
- Threat modeling
- Decision-making on vulnerability mitigation strategies
- Implementation of vulnerability detection mechanisms
- Security scans
- DevSecOps practices
- Technical environment: Visual Studio Code, JetBrains Suite, MS Threat Modeling Tool, DevSecOps, Git, AWS, DynamoDB, SQL Server, Endur, Snowflake, Orca
- Languages: C#, JavaScript, TypeScript, Python, PowerShell, Bash, Terraform, SQL
Jan G.
Last position:
Master Data Application at confidential
Visualization, search, and maintenance of various types of master data, providing them via a REST API, and implementing a variety of import and export formats.
Implementation, architecture, project management.
Technologies and tools: Angular (Signals, Signal Store, swagger-codegen, standalone components), Java, PostgreSQL, ActiveMQ, JavaScript, Spring Boot (Spring Core, Spring MVC, Spring Data/JPA via Hibernate, Spring Security, Spring Modulith), JUnit, Flyway, QueryDSL, GraphQL, REST API, Node, npm, Maven, SonarQube, GitLab CI/CD pipelines, Docker, Nexus, OpenAPI + Swagger UI, Keycloak, OAuth2, OpenID Connect, IntelliJ IDEA, Jira, Confluence.
Dalia Cananau
Last position:
Oracle Developer at Freelance
- Design and implementation of an OCI-based data warehouse and ETL system to replace legacy mainframe applications
- Developed a database optimization strategy and planned the rapid conversion of JCL and COBOL routines to PL/SQL using AI
- Developed an Oracle Apex-based app for internal administrative processes in the public sector (office equipment, staff training)
- Implemented PL/SQL workflows for approval processes and created a responsive mobile version with JavaScript and CSS
- Used Azure DevOps for backlog management and documentation, and Git for version control
- Developed REST interfaces to CRM systems
- Replaced and reprogrammed Oracle Forms screens with Oracle Apex and updated to the latest Apex versions
- Designed a Git branching strategy and conducted code reviews
- Maintained and further developed an EDI-based data exchange system based on Oracle Advanced Queuing for the public sector in Austria
- Performed data analysis and created charts in the Oracle Apex frontend; installed standalone ORDS and Apex 23.1
- Worked agile using the Spotify model; developed complex Apex pages with support from Oracle JET
- Rebuilt and customized existing PL/SQL packages, created workarounds for database version differences, and optimized queries
- Developed Apex applications for broker pools to manage and optimize Oracle databases in the banking environment, including SSO-based authorization systems with OAuth2 and Keycloak
- Built extensive Oracle Apex applications for BI and data mining modernization projects and developed manual and automated projection methods in the frontend
- Carried out data warehousing projects in the banking sector and used Scrum and Kanban in team projects
Daniel Münter
- SaaS including subscription management and mobile app
Sara Schönherr
Last position:
Senior Software Developer with a Focus on UI/UX at vGen GmbH
Development of an interactive prototype for the concept of an AI-supported Enterprise Architecture Management tool. The goal was to present complex relationships between IT systems, business processes, and departments in a way that is easy to understand and to support decision-making in the context of IT transformations.
The prototype combined data-driven analyses with guided questions and interactive visualizations. A central part was the integration of a RAG process to provide domain-specific EAM knowledge in context. The focus was on quick idea validation, user-centered interaction design, and the technical feasibility of a scalable overall concept.
Design, implementation, and validation of a RAG process for domain-specific EAM knowledge with Python, LangChain, and graph/vector databases (Neo4J, Milvus)
Business and technical requirements analysis as well as definition of an MVP
Development of the architecture and technology concept using Angular, Spring Boot, GraphQL, and Kubernetes
Design of an interaction concept and creation of a brand style guide with Figma
Development of interactive prototypes with Angular, Konva.js, and TypeScript
Integration of CI/CD processes with GitLab CI/CD
Discover over 15,000 top freelancers
Statistics of experts using OAuth
Aggregated from the professional profiles of matched freelancers.
Experience
17 years (Germany: 19 years)
Position duration
1.7 years (Germany: 1.8 years)
Positions per freelancer
15 (Germany: 14)
Top business areas
Information Technology, Product Development, Operations
Top industries
Information Technology, Retail, Transportation
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
100% (Germany: 86%)
Master's degree or higher
80% (Germany: 51%)
Doctorate
40% (Germany: 8%)
Certifications per freelancer
2
Most common languages
German, English, Spanish
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 Dusseldorf 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 Dusseldorf 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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
What OAuth does
OAuth is an authorization framework used to let apps access data or actions without sharing passwords. It is common in login flows, API access, connected apps, and delegated permissions. Strong specialists know where OAuth ends and authentication begins.
Common builds
Companies use OAuth specialists for:
- Social login and enterprise single sign-on
- API gateways and token-based access
- Consent screens and permission scopes
- Service-to-service access with bearer tokens
- Integrations with identity providers
Core ecosystem
OAuth work often sits next to OpenID Connect, JWT, SAML, and identity platforms such as Auth0, Okta, Azure AD, or Keycloak. Good professionals understand authorization code flow, refresh tokens, scopes, PKCE, and token validation. They also know how clients, resource servers, and authorization servers fit together.
When to bring in help
Bring in freelance expertise when a product needs secure login, partner integrations, or a legacy auth flow rebuilt. Dusseldorf teams often need support across commerce, industrial software, logistics, and B2B platforms where access control must be clear and auditable. Remote work fits most tasks, while on-site sessions help when security teams, product leads, and backend specialists need to align.
What strong specialists do
A strong OAuth professional writes clean flows, checks edge cases, and documents scopes and token lifetimes clearly. They test error paths, redirect handling, consent handling, and revocation. They also spot weak secrets, broken callback logic, and confusing authorization rules before release.
Quality signals
Look for people who can explain OAuth 2.0 in plain terms and show real work with production APIs. They should be comfortable with security reviews, documentation, and debugging across browser, mobile, and backend clients. If they can also work with OpenID Connect and SSO, they are usually ready for more complex systems.
Frequently asked questions
What clients ask us most about OAuth — answered in short.
OAuth is used to let one system access another system’s data or actions in a controlled way. In practice, that means login flows, API access, delegated permissions, and partner integrations. It helps teams avoid sharing passwords between services.
OAuth handles authorization, which means access delegation and permissions. OpenID Connect adds identity and login on top of OAuth 2.0. Many projects need both, but they solve different problems.
OAuth 2.0 is what most modern systems use. OAuth 1.0 still appears in older integrations, but it is less common in new work. A good specialist can support migration, compatibility, and cleanup when legacy systems are involved.
A strong OAuth specialist usually knows JWT, OpenID Connect, SAML, PKCE, and token validation. They should also understand HTTP, API design, and identity provider setup. For backend-heavy work, experience with session handling and secure secret management helps a lot.
OAuth can look simple at first, but production work needs someone who understands edge cases. A small login flow may need only focused expertise, while larger platforms need deeper security and integration experience. The more systems and user paths involved, the more important that depth becomes.
Yes, OAuth work is often well suited to remote collaboration. Most tasks involve design reviews, code changes, and security checks that can be done online. On-site time in Dusseldorf can still help for workshops with security, backend, and product stakeholders.
A strong OAuth expert explains flows clearly, identifies weak assumptions, and documents scopes, tokens, and callbacks well. They should have real production experience, not only theory. Good signs are careful testing, clear debugging habits, and solid security awareness.
OAuth support is often needed when a company adds SSO, builds partner integrations, or fixes broken authorization flows. It also comes up during platform migrations, app launches, and security reviews. Freelancers are useful when the team needs focused help without delaying the whole roadmap.
The average hourly rate of freelancers in Dusseldorf, Germany who have used OAuth in their recent projects is 83 €, which corresponds to a daily rate of about 664 € based on an 8-hour working day.
Of the freelancers in Dusseldorf, Germany who have used OAuth in their recent projects, 100% hold at least a Bachelor's degree, 80% hold at least a Master's degree, and 40% hold a doctorate.
On average, freelancers in Dusseldorf, Germany who have used OAuth in their recent projects have 17 years of professional experience, with a single engagement typically lasting around 1.7 years.
The most common languages among freelancers in Dusseldorf, Germany who have used OAuth in their recent projects are German (100%), English (100%), and Spanish (17%).
The most common industries among freelancers in Dusseldorf, Germany who have used OAuth in their recent projects are Information Technology (100%), Retail (83%), and Transportation (67%).
The most common business areas among freelancers in Dusseldorf, Germany who have used OAuth in their recent projects are Information Technology (100%), Product Development (100%), and Operations (67%).
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 
Stuttgart Request a free demo
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Philipp Thomaschewski
FRATCH CEO
