Firebase Authentication Experts in Germany
in minutes from over 15,000 CVs with the power of AIHire experts who set up Firebase Auth flows, social sign-in, email and password login, multi-factor checks, and secure session handling for web and mobile apps. Get fast, precise matching with vetted, available freelancers.
Meet FRATCH Experts in Germany, who have recently used Firebase Authentication
Can Savastürk
Last position:
Platform Engineer at ClimateChoice
In a lean, execution-focused environment, I took ownership beyond a narrow engineering lane, shaping and implementing systems across backend, data, and infrastructure. Partnered directly with the three founders in a fast-moving, high-stakes environment, turning strategic priorities into concrete technical decisions and production outcomes.
- Owned core platform development across backend (Django/Rest Framework/Postgres), ETL (Python/Dagster), infrastructure (Terraform/Kubernetes/AWS), and frontend (typescript/react) for a climate-tech SaaS product, driving continuous cross-stack development across five repositories from October 2021 to this day.
- Architected and owned a standalone internal Python scoring framework for CRC assessments, using YAML-driven rules and metaprogramming to enable non-technical users to define complex evaluation logic without hardcoded implementations.
- Built and stabilized ETL and scraping pipelines using Dagster and Scrapfly, improving document ingestion, tagging, retry behavior, deployment flow, and operational resilience.
- Contributed to platform modernization and reliability through Django/Python upgrades, Postgres/RDS and EKS changes, CDN/TLS updates, test and performance improvements, and observability hardening.
- Drove backend engineering for product features, translating requirements into technical specifications, API contracts, data structures, and scalable implementation plans.
Matthias Eymers
Last position:
Lead Android Developer at Star Finanz-Software Entwicklung und Vertriebs GmbH
- Further development of the Android app "StarMoney"
- Major XML to Compose redesigns
- Introduction of new technologies and architecture
- Implementation of instant bank transfer
- Development following the agile Scrum process
Paul Köhler
Last position:
Senior Flutter Developer at Elea.health
- Further development of a complex laboratory information system
- Development of new features including design
- Close collaboration with company leadership
- Embedded in a top team with consistently high performance under time pressure
- Agile approach, Kanban
Jan Kronenberg
Last position:
Software Architect: Training Platform for IT Career Changers at appvanced
- Mobile: Kotlin Multiplatform (KMP), Kotlin, Swift, SwiftUI, Jetpack Compose, Ktor, Room, Koin
- Backend: Spring Boot, GCP Cloud Run, GCP Load Balancer, GCP Eventarc
- Planned and developed a cloud backend architecture with Google Cloud Platform
- Developed a cross-platform architecture with Kotlin Multiplatform (KMP)
- Tech lead for comprehensive large project including webshop, two apps and omnichannel backend
Max Degterev
Last position:
Tech Lead, Interim CTO/CPO at MatchDispatch
I worked on automating cold outreach.
- Developed a queue architecture to support the parallel execution of large volumes of background tasks.
- Integrated multiple email delivery providers.
- Implemented an LLM-based data enrichment process.
Technologies: TypeScript, React, Node.js, Next.js, Drizzle ORM, PostgreSQL, Next-Auth, JWT, Docker, Kubernetes, AWS, CloudFlare, Traefik, Groq, Jest, Figma
Calin Calin
Last position:
Gorillas
- Successfully migrated 99.9% of the users to the new app by automatically logging them in using the token retrieved from the old app.
- Facilitated more than 400k signups in the first 3 months after releasing the redesigned app by supporting phone, Apple, Google, and Facebook authentication methods implemented using Firebase.
- Helped more than 250k users successfully add their address by supporting search using Google Places and by selecting the exact location using Google Maps based on the service delivery zones.
- Skills: Firebase Auth, Google Places, Google Maps, Segment, Adjust, Braze, Rich Push Notifications
Anurag Kurumaddali
Last position:
Software Development Engineer - Mobile at Krian GmbH
- Engineered the App-Connect module for Volkswagen HMI systems (Passat, Golf, ID series), reducing smartphone pairing time by 30%.
- Developed SABGWALA, a Flutter-based e-commerce app with Clean Architecture, increasing daily active users by 40%.
- Delivered Det-Medex, an Android ML app using MediaPipe, improving real-time body tracking by 25%.
- Integrated a TensorFlow module into the Android and iOS modules of the Det-Medex app, using Jetpack Compose for design and Kotlin for the camera module.
- Utilized Firebase Core, Firebase Auth, and Firebase Cloud Storage for backend services.
- Implemented Clean Architecture with Get_It for dependency injection.
- Managed routing with Go_router and state management with flutter_bloc.
- Supported both German and English languages in the application.
- Developed and maintained the App-Connect application for Volkswagen, improving connectivity reliability with Apple CarPlay, Android Auto, and MirrorLink by 20%.
- Enhanced user interface and experience, resulting in a 15% increase in user satisfaction.
- Implemented robust Bluetooth and USB connectivity features, reducing connection errors by 25%.
- Collaborated with cross-functional teams in an agile environment, leading to on-time delivery of key milestones.
Alexander Schwartz
Last position:
Full-Stack Developer (Java/Kotlin/Angular) at Hypoport (Vergleich.de)
Further development of the vergleich.de website
Development of new and improvement of existing backend services as microservices
Deployment via TeamCity and GitHub Actions
Development of monitoring tools
Development of REST APIs
Database migration from Oracle to PostgreSQL
Java and Kotlin (including Spring, Spring Boot, JPA, Hibernate)
Angular (TypeScript) and JavaScript
IntelliJ IDEA and WebStorm
Apache Maven
Oracle DB (and SQL Developer), MongoDB, PostgreSQL DB
Git (GitLab, GitHub, BitBucket)
TeamCity
Jira
Docker
JUnit, Mockito, jasmin
Patrick Seelemeyer
Last position:
Senior Software Engineer at Delivery Hero
- Led a team of 6 software engineers to develop and maintain an AI-driven healthcare platform, enabling automated diagnostics and prescriptions based on real-time ECG data analysis
- Designed and developed a robust Revenue Cycle Management (RCM) system, integrating HL7 and FHIR APIs to enable seamless interoperability, real-time data exchange, and HIPAA-compliant data handling, improving billing efficiency, claim processing, and regulatory adherence in healthcare operations
- Migrated a legacy monolithic application to a scalable microservices architecture, enhancing system modularity, scalability and maintainability while implementing key design patterns such as Strangler, Database-per-Service, API Gateway, Saga and CQRS for efficient service communication and transaction management
- Architected and led a C# 9/.NET 6 microservices ecosystem handling hotel reservations, payments, and loyalty programs, enabling 99.99% uptime across 10+ services
- Defined OpenAPI/Swagger contracts and auto-generated client SDKs, reducing front-to-backend integration time by 50%
- Containerized each service with Docker and orchestrated deployments via Kubernetes, slashing release lead time from days to hours
- Designed PostgreSQL schemas optimized for high-volume transactional workloads and implemented Redis caching layers to accelerate read-heavy endpoints by 80%
- Built Kafka streaming pipelines for real-time availability updates and audit logs, processing 2 million+ events per hour with end-to-end delivery guarantees
- Implemented unit and integration tests for React applications using Jest and React Testing Library, ensuring 80%+ test coverage, improving component reliability, and preventing regressions
- Defined and deployed AWS cloud infrastructure using Terraform, while containerizing and orchestrating microservices with Docker and Kubernetes, improving automation and system scalability
- Built a scalable full-stack booking application using React 18 and Django REST Framework, integrating Celery and Redis for asynchronous task processing, while deploying on GCP with Cloud Run and Firestore, enabling real-time scheduling, payment processing, and automated notifications
- Mentored junior developers through code reviews, pair programming, and knowledge-sharing sessions, improving team efficiency by 30% while maintaining comprehensive API documentation using Swagger/OpenAPI
Malte Schonvogel
Last position:
Freelance iOS Developer at United Internet AG
- Under the brands Web.de, GMX, 1und1, and Mail.com, offers email and cloud services used daily by millions on iPhones.
- As part of a 10-person team, added new features, refactored legacy code, and increased test coverage.
- Features: Email and cloud access, compose email, email and cloud sync, news, contact, multiple account management, synchronization, notifications, premium features, ads.
- Technologies used: UIKit, SwiftUI, Combine, VIPER, Unit tests, UI tests, Snapshot tests, Fastlane, Cocoapods, MailCore.
Hans-Peter Martini
Last position:
Developer at IT Center of the Federal Employment Agency
- Developing event-driven microservices with REST controllers and services
- Mapping data with JSON models
- Producing and consuming Kafka streams
- Generating PDFs
- Developing smart components, services, guards
- Processing the REST stream using observables following the reactive programming paradigm
- Integrating web components
- Implementing user authentication using OIDC/OAuth2 and JWTs
- Integrating Keycloak for simplified identity provider connection and introducing two-factor authentication
- Creating mockups for planning, implementation analysis, and feasibility studies
- Analyzing and implementing business requirements
- Conducting code reviews
- Maintaining and updating CI/CD pipelines
- Performing refactorings
- Conducting sprint reviews
- Monitoring production applications via Kibana and Grafana
Discover over 15,000 top freelancers
Statistics of experts using Firebase Authentication
Aggregated from the professional profiles of matched freelancers.
Experience
15 years
Position duration
1.4 years
Positions per freelancer
11
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Media and Entertainment, Retail
Bachelor's degree or higher
78%
Master's degree or higher
11%
Certifications per freelancer
0
Most common languages
English, German, Latin
Speak two or more languages
100%
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 Germany 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 Germany using Firebase Authentication
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
Sign-in flows
Firebase Authentication is used to add sign-in and account access to apps without building a full auth system from scratch. It supports email and password, phone sign-in, and social logins through Firebase Auth for web, iOS, and Android. Teams use it when they need login to work cleanly across products and devices.
What experts deliver
- Email link, password, and social provider setup
- User session handling and token logic
- Account linking, password reset, and verification flows
- Multi-factor authentication configuration
- Rules-aware access around Firestore and Storage
Ecosystem skills
Strong specialists know the wider Firebase stack, not just Authentication. They work with Firebase SDKs, Cloud Functions, Firestore, Cloud Storage, and custom claims for role-based access. They also understand how auth state affects app routing, onboarding, and backend checks.
When companies bring help
Companies usually bring in freelance expertise when auth needs to be shipped quickly, fixed after a release, or aligned with an existing app architecture. That is common in SaaS products, internal tools, consumer apps, and projects in Germany where teams want a clean handoff with solid documentation. It is also useful when a legacy login flow must be migrated with low risk.
What good specialists do
A strong Firebase Authentication specialist designs flows that are simple for users and safe for the product. They test edge cases such as account linking, token refresh, password recovery, and provider conflicts. They also coordinate with product and backend teams so the login experience stays stable across devices.
Quality signals
Look for clear experience with Firebase Auth and real implementation work, not just SDK familiarity. Good professionals can explain security rules, state management, and server-side validation in plain words. They should also be comfortable reviewing existing auth code, spotting fragile parts, and improving it without breaking live users.
Frequently asked questions
Curious about Firebase Authentication? Here are the answers that come up again and again.
Firebase Authentication is used to handle user sign-in, account creation, password recovery, and session control in web and mobile apps. Teams choose it when they want login to be reliable without building the whole identity layer themselves. It fits products that need fast onboarding and secure access across devices.
Firebase Auth is often simpler to set up than a fully custom system and lighter to manage than some broader identity suites. Compared with custom login code, it saves time on common flows like password reset and social sign-in. Compared with Auth0, it is often chosen when the app already uses Firebase services and the team wants a tighter stack.
A strong Firebase Authentication specialist usually knows Firebase SDKs, Firestore, Cloud Functions, and security rules. They should also understand token handling, provider linking, and how auth state affects frontend routing. For many projects, backend validation and mobile app experience matter as well.
Firebase Auth work can be straightforward for a small setup, but production login flows still need careful handling. For a simple app, one experienced specialist may be enough. For account linking, multi-factor login, or migration from another system, you want someone who has already shipped similar work.
Yes, Firebase Authentication work is often done remotely because the main tasks are setup, review, testing, and integration. For teams in Germany, remote work usually fits well if the specialist can communicate clearly and share implementation notes. On-site sessions can still help during planning or when several systems must be aligned.
If login is blocking release work, causing user drop-off, or creating security concerns, it is time to bring in Firebase Authentication expertise. Other signs are broken password flows, confusing account linking, or unclear rules around access. A specialist can usually stabilize the setup faster than a generalist working alone.
Look for someone who can explain Firebase Authentication decisions clearly and show how they handle edge cases. Good specialists talk about token verification, session expiry, provider conflicts, and secure backend checks. They should also be able to review your current flow and point out specific improvements, not just offer generic advice.
Teams often compare Firebase Authentication with custom auth, Auth0, and sometimes the identity tools in other backend stacks. The right choice depends on your app shape, security needs, and whether you already use Firebase services. A good specialist can help you judge whether Firebase Auth is the cleanest fit or whether another path is better.
The average hourly rate of freelancers in Germany who have used Firebase Authentication in their recent projects is 88 €, which corresponds to a daily rate of about 706 € based on an 8-hour working day.
Of the freelancers in Germany who have used Firebase Authentication in their recent projects, 78% hold at least a Bachelor's degree and 11% hold at least a Master's degree.
On average, freelancers in Germany who have used Firebase Authentication in their recent projects have 15 years of professional experience, with a single engagement typically lasting around 1.4 years.
The most common languages among freelancers in Germany who have used Firebase Authentication in their recent projects are English (100%), German (91%), and Latin (9%).
The most common industries among freelancers in Germany who have used Firebase Authentication in their recent projects are Information Technology (100%), Media and Entertainment (45%), and Retail (45%).
The most common business areas among freelancers in Germany who have used Firebase Authentication in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (55%).
Main locations of FRATCH Experts, who have recently used Firebase Authentication
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 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
