Single Sign-On Experts in Berlin
in minutes from over 15,000 CVs with the power of AIWork with specialists who architect federated identity, integrate modern identity providers, and harden access security across enterprise landscapes, matched fast and reliably through FRATCH.
Meet FRATCH Experts in Berlin, who have recently used Single Sign-On
Alois R.
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
Julius H.
Last position:
Freelancer at Freelancer — Pharma Industry
- Led migration to GCP using Terraform, GKE, and GitOps, improving deployment consistency and scalability
- Implemented Datadog observability stack via Terraform and datadog-operator
- Established automated end-to-end tests and on-call processes, improving incident response and service reliability
- Migrated from NGINX Ingress Controller to Kubernetes Gateway API (NGINX Gateway Fabric)
- Migrated stateful services (PostgreSQL and Redis) to GCP, improving scalability and operational reliability
Caleb C.
Last position:
Senior Python Backend Engineer at Simon-Kucher
Transmission system operator – network provisioning platform (team lead)
- Designed the saga orchestrator in Python that provisions network fabrics with rollback.
- Split IP, identity, and resource allocation into bounded contexts with their own databases and typed clients.
- Implemented data access using DDD repositories and units of work, with no SQL in the domain code.
- Required integration tests using real PostgreSQL and RabbitMQ containers, and API fuzzing for every service.
- Introduced an agent workflow where a spec starts each change and a human approves every merge.
- Rolled out OpenTelemetry auto-instrumentation through GitOps across eighteen Kubernetes clusters.
- Led incident response for stuck provisioning and recorded every outage as a post-mortem.
Languages and software used: Python, FastAPI, Pydantic v2, SQLAlchemy async, PostgreSQL, RabbitMQ, Celery, pytest, testcontainers, schemathesis, Helm, Flux CD, GitLab CI, OpenTelemetry, pi coding agent.
Software product company – datacenter simulation SaaS (backend development)
- Built the asynchronous simulation pipeline as the second-largest contributor among more than twenty team members.
- Tagged every image by commit SHA and semver in the GitHub Actions deployment workflows.
- Diagnosed the RabbitMQ memory alarm that froze every simulation and fixed the limits in the Helm chart.
- Converted the test suite to function-style pytest, with coverage reported in every pipeline.
Languages and software used: Python, FastAPI, SQLAlchemy, Alembic, Celery, RabbitMQ, Redis, PostgreSQL, S3, EKS, Helm, Keycloak, GitHub Actions, pytest, mypy, ruff, SonarQube.
Internal AI platform – model serving and telemetry
- Built the FastAPI service that deploys open-weight models on GPU tiers as OpenAI-compatible endpoints.
- Upgraded production EKS by two Kubernetes minor versions and fixed zone-bound storage faults.
- Traced every model call, including its token count, cost, and latency, through the OpenTelemetry operator.
Languages and software used: Python, FastAPI, vLLM, LangGraph, pydantic-ai, OpenAI and Anthropic APIs, EKS, Helm, Flux CD, Terraform, GitLab CI, OpenTelemetry, Grafana.
Jorge P.
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
Gyan P.
Last position:
Senior DevOps & Cloud Architect, Head of Infrastructure at Bosch
- Azure Landing Zone architecture: Design and implement a hub-spoke, multi-region-capable Azure landing zone that provides the secure, scalable and highly available foundation for autonomous driving and parking data/ML platforms.
- Compliance through Azure Policy: Enforce security and compliance standards across Azure subscriptions via Azure Policy (guardrails, deny/audit/deploy-if-not-exists), consistently achieving top-tier infrastructure security scores.
- Infrastructure-as-Code: Automate provisioning and configuration of Azure resources with Terraform and Bicep, with changes delivered through reviewed CI/CD pipelines.
- Azure Databricks and Unity Catalog: Extensive experience operating Azure Databricks with Unity Catalog for centralized data governance, access control, lineage and auditing across workspaces.
- Monitoring and observability: Built and run infrastructure monitoring and logging with Azure Monitor, Prometheus, Grafana and Loki, covering platform health, alerting, troubleshooting and capacity trends.
- Platform at scale: Architected and operate cloud data/ML platforms supporting multi-PB vehicle data ingestion and simulation; orchestrate Argo Workflow-based recompute and autolabeling services scaling to 100k+ concurrent pods on AKS.
- Reproducible ML: Established reproducible training environments with dataset versioning and provenance tracking, enabling auditing and experiment reliability.
- Operational excellence: Automated GitHub organization management and CI/CD pipelines, improving developer productivity and deployment reliability; automated recurring operational processes.
- FinOps: Developed transparent resource utilization and cost-tracking for multi-project Azure environments.
- Leadership: Technical lead for infrastructure topics, collaborating with development, DevOps and security teams; technical interviewer and recruitment panel member for scaling the engineering team.
Abhiroop B.
Last position:
Software Engineer III at Foundry Digital
- Developed and deployed microservices in Kotlin and Spring Boot, integrated AWS Secrets Manager to secure credentials and decreased network calls using Spring cache.
- Refactored Kafka consumer using Spring Kafka with semaphore-based backpressure to cap records and keep heap memory stable under spikes; switched to batch upserts to cut down on database invocations; added Testcontainers integration tests for Kafka and database to pave the way for future changes.
- Automated the financial reconciliation workflow in Spring Boot (Kotlin) using Spring Scheduler, transactional boundaries, JPA/Hibernate on MySQL, and Flyway migrations, saving the accounts team 16+ hours per week.
- Designed and dockerized payments end-to-end test framework in Robot (Python) with reusable keyword libraries and profiles; integrated with GitLab CI (JaCoCo XML and HTML reports) to accelerate releases and lift code coverage to 80%.
- Implemented end-to-end observability on Datadog by instrumenting services with Datadog APM, correlating metrics and logs, provisioning dashboards, and creating monitors with burn-rate alerts and anomalies to harden reliability and give stakeholders clear visibility.
Raj U.
Last position:
Courier / Operations Support at Closer Go Germany GmbH
- Work within time-critical operating procedures; coordinate issues with customers, partners and central support.
- Maintain reliable handovers and concise incident communication when service, equipment or routing issues occur.
Marcus B.
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-tenent)
- 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
Chiemela O.
Last position:
AI Enthusiast – Independent Projects at Chiemela Ogu Consulting
Too Good To Throw (AI powered social impact webapp focused on reducing food waste in Nigeria):
Integrated Paystack Split Payments to automatically route payments between the platform and partner vendors.
Configured automated subaccount creation workflows so new businesses get a settlement account instantly.
Setup a scalable cloud backend using Supabase.
Implemented role-based access control (RBAC) for Users, Partners, and Admin.
FaithFlow (AI powered webapp supporting Christian teens on their spiritual journey):
Designed and implemented an AI-driven scripture search engine that interprets natural language questions and maps them to relevant Bible texts, commentary, devotionals, and cross-references.
Designed a spiritual growth dashboard enabling users to track reading progress, prayer streaks, and devotional completion milestones.
Ursula R.
Last position:
Sabbatical with Training at Own Sabbatical
Mario J.
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
Karthikeyan R.
Last position:
Full-Stack Developer — Own Product at Self-employed
Java 21 · Spring Boot 3 · Keycloak · PostgreSQL · Docker · Nginx · GitHub Actions · DigitalOcean · React 18 · TypeScript · Plasmo
- Architected and shipped a production-ready Job Application Tracker end-to-end: REST API with 5-stage workflow, pagination, sorting, and dynamic filtering — full ownership from design to live cloud deployment on DigitalOcean.
- Implemented production-grade identity management: OAuth 2.0 / OpenID Connect / JWT / RBAC via Keycloak, applying Hexagonal Architecture and DDD principles.
- Built automated CI/CD pipeline (GitHub Actions); containerised with Docker; Nginx reverse proxy with path-based routing and SSL termination.
- Developed a Chrome Extension (Plasmo framework, Manifest V3) that auto-fills job applications directly from LinkedIn into the tracker — demonstrates full product thinking across backend API and browser client.
Ottavio B.
Last position:
Semantic Test Framework for LLMs
Tobias J.
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
Maurizio F.
Last position:
Python Software Developer at Schönhofer Sales and Engineering GmbH
- Implemented a command line interface (CLI) for integration of REST APIs of various microservices for end users
- Centralized and simplified interaction with services through the CLI
- Implemented a REST microservice for custom data schemas based on an API-first approach
- Developed event-driven control with RabbitMQ to connect to other services
- Deployed services using Docker and Kubernetes and extended the CLI
- Managed complexity and data volume handling through the microservice
Discover over 15,000 top freelancers
Statistics of experts using Single Sign-On
Aggregated from the professional profiles of matched freelancers.
Experience
17 years (Germany: 19 years)
Position duration
2.3 years
Positions per freelancer
10 (Germany: 12)
Top business areas
Information Technology, Product Development, Operations
Top industries
Information Technology, Banking and Finance, Education
Certification focus areas
Information Technology, Project Management, Human Resources
Bachelor's degree or higher
90% (Germany: 84%)
Master's degree or higher
40% (Germany: 42%)
Certifications per freelancer
2 (Germany: 4)
Most common languages
German, English, Spanish
Speak two or more languages
96% (Germany: 95%)
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 Berlin 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 Berlin using Single Sign-On
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.
Single Sign-On experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Information Technology (96%)
- Banking and Finance (56%)
- Education (44%)
- Retail (44%)
- Media and Entertainment (36%)
- Automotive (32%)
- Healthcare (28%)
- Telecommunication (28%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Centralized Identity and Access Architecture
Single Sign-On simplifies user authentication by letting individuals sign in once to access multiple independent software systems. Organizations use SSO to eliminate password fatigue, enforce uniform security controls, and establish a single source of truth for identity management across internal tools and customer-facing web services.
Core Protocols and Federation Standards
Implementing resilient identity federation requires deep technical fluency in established open standards and protocol handshakes. Specialists configure token lifecycles, signature validations, and attribute mappings across distributed systems.
- Security Assertion Markup Language for enterprise federations
- OpenID Connect built on the authorization framework of OAuth 2.0
- System for Cross-domain Identity Management for automated provisioning
- Kerberos and Lightweight Directory Access Protocol for internal networks
Modern Ecosystem and Identity Providers
Identity architectures rely on specialized platforms to broker trust between identity providers and relying parties. Specialists work across leading commercial tools like Okta, Microsoft Entra ID, and Ping Identity, as well as self-hosted solutions such as Keycloak. They configure session timeouts, social logins, and multi-factor authentication rules for sensitive endpoints.
When Organizations Bring in SSO Specialists
Companies often lack in-house capacity when migrating legacy user tables to unified cloud identity providers. Berlin scale-ups and established enterprises seek contract professionals during compliance readiness drives, corporate mergers, or multi-tenant SaaS application launches to prevent session handling flaws and protect mission-critical workflows.
Berlin Tech Ecosystem and Project Delivery
Berlin hosts a large concentration of fintech, e-commerce, and enterprise software companies demanding robust security. Local organizations balance international identity federation with strict European privacy regulations. SSO professionals in this hub routinely collaborate across hybrid setups, aligning cloud providers with existing on-premises directories.
Distinguishing Top SSO Professionals
Exceptional professionals look beyond basic plugin integrations. They anticipate edge cases in distributed single logout, manage automated token revocations cleanly, and secure API gateways against token tampering. Their background bridges directory management, zero-trust network principles, and direct front-end integration to ensure friction-free user onboarding.
Frequently asked questions
The facts hiring teams ask for most often when it comes to Single Sign-On.
A Single Sign-On specialist designs and implements unified authentication systems connecting multiple software applications to a centralized identity provider. They configure secure federation protocols, map user attributes, and ensure seamless authorization flows across both internal corporate tools and public applications.
While both facilitate SSO, SAML relies on XML documents and is the traditional standard for enterprise federation, whereas OpenID Connect uses JSON Web Tokens on top of OAuth 2.0. Modern web and mobile applications usually favor OIDC for its lightweight payload, though SAML remains ubiquitous in corporate IT environments.
Strong Single Sign-On professionals should bring hands-on experience with identity providers like Okta, Entra ID, or Keycloak, along with deep networking and API security knowledge. Familiarity with automated provisioning via SCIM, directory services like LDAP, and OAuth 2.0 authorization code flows is essential.
A small application hookup requires moderate integration knowledge, but architecting SSO across multiple legacy systems demands senior specialists with comprehensive identity and access management backgrounds. Experienced professionals navigate edge cases like account merging, distributed session logout, and multi-tenant domain routing with minimal friction.
Organizations in Berlin frequently hire freelance SSO specialists when preparing multi-tenant B2B SaaS platforms for enterprise customers who mandate custom identity federation. Engaging external experts allows local product teams to implement complex security features quickly without pausing core roadmap development.
Yes, nearly all Single Sign-On configuration and protocol integration can be delivered completely remotely. For projects in Berlin involving local Active Directory installations or hardware security modules, hybrid arrangements provide occasional on-site alignment when testing restricted networks.
Misconfigured redirects, insecure token storage on the client side, and incomplete implementations of Single Log-Out represent frequent vulnerabilities during an SSO setup. Seasoned specialists prevent these risks by enforcing rigorous cryptographic validation, automated certificate rotation, and clear session invalidation workflows.
Evaluate the implementation by testing token verification routines, state parameter validation to block CSRF attacks, and adherence to zero-trust standards. A high-quality Single Sign-On deployment features comprehensive audit logging, minimal attribute leakage, and seamless failover handling whenever the identity provider encounters downtime.
The average hourly rate of freelancers in Berlin, Germany who have used Single Sign-On in their recent projects is 100 €, which corresponds to a daily rate of about 798 € based on an 8-hour working day.
Of the freelancers in Berlin, Germany who have used Single Sign-On in their recent projects, 90% hold at least a Bachelor's degree and 40% hold at least a Master's degree.
On average, freelancers in Berlin, Germany who have used Single Sign-On in their recent projects have 17 years of professional experience, with a single engagement typically lasting around 2.3 years.
The most common languages among freelancers in Berlin, Germany who have used Single Sign-On in their recent projects are German (100%), English (96%), and Spanish (16%).
The most common industries among freelancers in Berlin, Germany who have used Single Sign-On in their recent projects are Information Technology (96%), Banking and Finance (56%), and Education (44%).
The most common business areas among freelancers in Berlin, Germany who have used Single Sign-On in their recent projects are Information Technology (100%), Product Development (84%), and Operations (56%).
Main locations of FRATCH Experts, who have recently used Single Sign-On
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 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
