OAuth Experts in Berlin
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Meet FRATCH Experts in Berlin, who have recently used OAuth
Aruldass Arulanandu
Last position:
Web Module Lead at Mphasis Limited
- Led the end-to-end delivery of enterprise full-stack web applications by driving requirement analysis, solution design, frontend and backend development, database design, API integration, code reviews, team coordination, Agile execution, CI/CD deployments, production support, performance optimization, security implementation, and stakeholder collaboration to deliver scalable, high-quality software solutions.
Imran Ali
Last position:
Software Engineer II at LivePerson Germany GmbH
- Led development of 15+ microservices (Java 17, Spring Boot) driving customer interactions; migrated from on-prem to GCP Kubernetes, improving scalability and reducing infra cost by 20%.
- Optimized user services with CouchDB caching and API refactoring, cutting response times by 35% and enhancing customer experience.
- Implemented canary deployments, FluxCD GitOps, and CI/CD optimizations in GitLab, reducing release lead time by 25% and enabling zero-downtime rollouts.
- Set up Grafana health checks and Anodot alerts for latency, error, and throughput monitoring, reducing MTTR by 40%.
- Built secure APIs using OAuth2, DPoP, and Gatekeeper, integrated REST and GraphQL, and achieved 90%+ test coverage with unit and E2E tests.
- Mentored junior developers, promoted Agile best practices, and collaborated cross-functionally to deliver high-impact, reliable customer-facing features.
Ola Van Dunen
Last position:
IT Lecturer
- IT training in theory and practice for IT specialists in application development and system integration
Ibrahim Hilali
Last position:
Senior Full Stack / AI Engineer at Punktum Digital GmbH
- Context: Healthcare and laboratory teams required faster document analysis, treatment-planning support, and reliable AI workflows for MR/VR-assisted operations.
- Contribution: Built the AI healthcare platform, model/agent workflows, VR-glasses deployment platform, REST APIs, Next.js/React interfaces, and CI/CD pipelines.
- Impact: Delivered a production-ready AI product foundation that improved clinical document review, supported laboratory automation, and made VR fleet deployment manageable across environments.
Tech: TypeScript, Next.js, Node.js, React, Java, Spring Boot, Python, PyTorch, TensorFlow, Docker, PostgreSQL, OpenAPI, GitLab, GitHub Actions.
Marcus Brose
Last position:
Alpecin.de - Dr. Wolff Group
- Development of a component library based on a design system for several international brands such as Alpecin, Karex, Linola and Plantur 39
- Integration of headless CMS, PIM and commerce solutions
- UI/UX development
- Prototype development
- MVP development
- API design and development
- SaaS development (whitelabel/multi-tenant)
- Headless CMS integration
- Design systems Digital signage
- Internationalization (i18n)
- Javascript
- Component library
- Tailwind CSS
- Storybook
- HTML
- Vue 3
- Storyblok
- Github Actions
- SEO
- i18n Theming
- React
Alois Rietzler
Last position:
Senior Fullstack Developer at brandung GmbH
- Opt-in RAG extension over tenant-owned data sources (SharePoint, Confluence) on existing multi-tenant enterprise AI platform
- Architecture: ADRs, solution evaluations, permission strategy, cost modeling
- End-to-end SharePoint and Confluence connectors: OAuth consent flows, token refresh, metadata sync, search integration
- Permission resolution: ACL indexing at ingestion and query-time verification (document-level security)
- Elasticsearch hybrid search (semantic + keyword) with RRF scoring
- RAG chat with context injection and source citations
- Stack: Elastic Cloud, Elasticsearch, Docker, Northflank, Next.js, React, TypeScript, Prisma, Microsoft Graph API, Atlassian REST API, OAuth 2.0
Ursula Raab
Last position:
Sabbatical with Training at Own Sabbatical
Mario Jelinski
Last position:
Architect / Developer at handyhase
- Overhaul of the entire design and implementation of new UI/UX aspects using React
- Planning of the software architecture and structuring of the project for long-term scalability using Git for version control
Qaiser Abbasi
Last position:
Freelance Lead DevOps Engineer at Schwarz Gruppe Produktion
Bootstrapping a CloudOps team and building a multi-cloud provider backend for a low-code Internal Developer Platform (IDP) with env zero
Introducing user story mapping, ADRs, milestones, and backlog management
Designing and developing core APIs, setting up CI/CD pipelines, OpenTofu/Terraform scripts
Representing and communicating the team with third-party stakeholders (e.g. env zero)
(Cross-)team coaching on DevOps, software design, Terraform, Golang, and agile practices
Julien Look
Last position:
MLOps Engineer at SAMGEN
- Building and scaling cloud infrastructure on GCP to support a SaaS platform for industrial clients
- Designing and implementing a data-driven DevOps pipeline for streamlined deployment and CI/CD workflows
- Collaborating with Data Science team on MLOps workflow to automate integrated retraining
Tobias Jaeuthe
Last position:
Design of an AI-Agent-Based ERP System
- Design of an LLM-based agent system to control the ERP software
- Development of agent workflows with LangGraph and PydanticAI
- Planning interfaces between business logic and language models
- Planning agent orchestration
- Prototype development and demonstration
Tools: Python, Pydantic, React, LangChain, LangGraph, Linux
Jorge Pérez Suárez
Last position:
Software Engineer – AWS and Kubernetes Specialist at Citti
- Creation, maintenance and hardening of Kubernetes clusters employing Ansible and ArgoCD
- Keywords: Ansible, AWX, Kubernetes, NetApp, Prometheus, CI/CD ArgoCD, SSO, Fluent-bit, HAProxy, Calico, Keycloak, oauth2-proxy, SealedSecrets, kubeseal, Aqua kube-bench, CIS-Benchmarks, Aqua Trivy operator
Daniel Stopp
Last position:
Frontend and Web Developer at Datalyze Solutions
- Frontend development and implementation of various designs (landing pages, overview pages)
- Responsible for the content and updates of the Datalyze Solutions company website
- Joint planning and development of an admin application for listing and locating real estate projects (CBRE)
- Joint planning and development of extensive solutions for automatic staff allocation in plants (Bosch)
- Backend development of various small projects with different stacks
- Tech stack: GitLab CI/CD, Elixir, Phoenix Framework, Ecto, PostgreSQL, Docker, Hetzner, Traefik, NGINX, Python, Flask, Next.js/React, Leaflet, GeoServer, TypeScript, MongoDB
Tino Truppel
Last position:
Director Technology at Forte Digital Germany
- Leading 20+ staff in development, site reliability engineering, and architecture.
- Leading the group-wide agentic AI initiative (Norway, Poland, Germany).
- Hands-on solution architect and AI consultant for over 50% of my working time on client projects in the publishing sector – from local publishers to international corporations.
- Strategic consulting and technical implementation of AI workflow platforms (n8n, Workato).
- Developing prototypes for traditional, AI-based, and agentic AI workflows.
Olaf Nouvortne
Last position:
Frontend Engineer at Danaher/Hach Lange GmbH
- Developed a SolidJS frontend UI for a spectrometric water analysis system on an ARM-based embedded Linux platform
- Prototyped UI in TypeScript React/Nx with LitElements and MQTT integration
- Built production UI using SolidJS, SUID, i18next, Ajv, MQTT.js, C3.js
- Refined requirements with UX team and water analysis system engineers
- Defined and documented system architecture, MQTT message formats, frontend architecture, and development setup
- Set up frontend system from scratch, implemented domain-oriented type system, UI components, and application state
- Managed MQTT pub/sub services and schema-based message validation in frontend
- Coached two junior frontend developers
- Worked in an agile remote team using JIRA, Git, and Bitbucket
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
2.1 years (Germany: 1.8 years)
Positions per freelancer
12 (Germany: 14)
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Education, Banking and Finance
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
100% (Germany: 86%)
Master's degree or higher
35% (Germany: 51%)
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 Berlin 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 Berlin 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 the standard for delegated access. It lets users grant an app limited access to an API or service without sharing a password. Teams use it for login flows, consent screens, access tokens, refresh tokens, and secure third-party integrations.
Typical projects
- Single sign-on and social login flows
- API authorization for internal and partner systems
- Mobile and SPA sign-in with OAuth 2.0 and PKCE
- Service-to-service access control
- Migration from older auth flows
Stack around it
Strong specialists know OAuth 2.0, OAuth 1.0a, and OpenID Connect, plus the identity layer around them. They work with JWTs, token introspection, scopes, PKCE, redirect URIs, and consent design. They also understand how OAuth fits with providers such as Auth0, Keycloak, Okta, Azure AD, and Google Identity.
When to bring in help
Companies look for freelance expertise when auth breaks product delivery or security reviews slow things down. That often happens during a new login rollout, a legacy migration, a partner API launch, or a failed integration between frontend, backend, and identity provider. Berlin teams often want experts who can work smoothly in English and align with product and security stakeholders on site or remotely.
What strong specialists do
Strong OAuth professionals make the flow easy to use and hard to misuse. They choose the right grant type, keep tokens short-lived, protect secrets, validate callbacks, and define clear scopes. They also document the setup so teams can maintain it without guesswork.
Good signs to look for
- Clear understanding of authorization versus authentication
- Practical experience with redirect-based and token-based flows
- Careful handling of refresh tokens and PKCE
- Ability to spot insecure shortcuts in existing code
- Clean handover notes for product and security teams
Frequently asked questions
Need clarity? These are the questions we hear most often about OAuth.
OAuth is used to let an app access data or actions in another system without taking over the user’s password. Companies use it for login, API access, partner connections, and delegated permissions. It is common in web apps, mobile apps, and internal tools that need secure integration with identity providers.
OAuth is for authorization, while OpenID Connect adds a login layer on top of it. If a project needs sign-in and identity information, OpenID Connect is often the better fit. If it only needs limited access to an API, OAuth alone may be enough.
A strong OAuth freelancer helps when authentication or API access becomes a blocker. That often happens during a new product launch, a migration from a legacy flow, or a security review of an existing setup. They can also help when multiple teams must agree on scopes, tokens, and identity provider settings.
A good OAuth specialist usually knows token handling, JWTs, PKCE, API security, and identity provider configuration. Experience with backend services, frontend redirect flows, and mobile app auth is also useful. If the project uses an IAM product, familiarity with that setup helps a lot.
OAuth is much safer and more flexible than basic auth for delegated access. Basic auth sends credentials directly, which is rarely a good fit for modern systems. Custom login code can work, but it often misses important security details that OAuth already defines.
A OAuth project needs someone who has shipped similar flows before, not just read the spec. Simple integrations may only need a careful implementation review, while complex setups need someone who can design scopes, token lifecycles, and provider settings from the start. The harder the integration, the more valuable practical release experience becomes.
Yes. OAuth work is often done remotely because the key tasks are technical design, implementation, and review. Berlin teams may still want a few on-site sessions for stakeholder alignment, but most of the implementation can be handled from anywhere with clear access to systems and documentation.
Look for someone who can explain OAuth flows in plain language and show where token, scope, and redirect mistakes usually happen. Good specialists ask about the app type, provider, threat model, and fallback paths before writing code. They also leave clear notes so your team can maintain the setup after handover.
The average hourly rate of freelancers in Berlin, Germany who have used OAuth in their recent projects is 82 €, which corresponds to a daily rate of about 654 € based on an 8-hour working day.
Of the freelancers in Berlin, Germany who have used OAuth in their recent projects, 100% hold at least a Bachelor's degree and 35% hold at least a Master's degree.
On average, freelancers in Berlin, Germany who have used OAuth in their recent projects have 17 years of professional experience, with a single engagement typically lasting around 2.1 years.
The most common languages among freelancers in Berlin, Germany who have used OAuth in their recent projects are German (100%), English (100%), and Spanish (17%).
The most common industries among freelancers in Berlin, Germany who have used OAuth in their recent projects are Information Technology (100%), Education (57%), and Banking and Finance (43%).
The most common business areas among freelancers in Berlin, Germany who have used OAuth in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (61%).
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.
Hamburg 
Munich 
Cologne 
Frankfurt 
Stuttgart 
Dusseldorf Request a free demo
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Philipp Thomaschewski
FRATCH CEO
