Expo Experts in Germany
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Meet FRATCH Experts in Germany, who have recently used Expo
Stefan O.
Last position:
Founder at ProtocolEngine.io
Evidence-led health intelligence platform turning published research into personal health protocols. It scores 430 habits, foods, and supplements against the studies behind them, and moves the score when the evidence moves. Built solo.
- Built the daily ingestion pipeline across PubMed, bioRxiv, and medRxiv: 43,000+ papers from 3,400+ journals processed into 230,000+ typed evidence claims, each one traceable back to the study it came from.
- Designed the six-factor evidence scoring model and the public changelog behind it, so no recommendation ever appears without the papers underneath it. 23,000+ grade changes recorded and explained to date.
- Shipped an entity information model connecting every intervention to its mechanisms, biomarkers, and outcomes: 118 biomarkers with region-specific reference ranges, 77 mechanisms, 32 graded outcomes.
- Built the personalisation layer: blood panel ingestion that reads lab PDFs with a vision model and corrects results for draw time against the user's wake anchor, plus Oura, WHOOP, and Withings integration for daily readiness context.
- Operate eleven specialised review agents over the corpus and codebase, covering paper curation, retrieval quality, health-claim compliance across EU and US regimes, and security.
- Shipped the Evidence Assistant, a RAG assistant that answers from the claim database and cites the underlying papers, plus a B2B practitioner tier, an Expo React Native app, and localisation across 3 languages and 7 markets.
Stack: Next.js 16, TypeScript, Supabase, pgvector, Anthropic Claude, Vercel, DeepInfra.
Michael H.
Last position:
Frontend Developer at RTL Tech
- Development and optimization of the RTL+ frontend application for SmartTV and set-top box platforms with React and Next.js.
- Key role in the technical coordination of developers within the team and in coordinating implementation.
- Central interface to adjacent teams to simplify development processes and improve cross-team alignment.
- Improved frontend performance, stability, and rendering behavior on low-powered devices in a restricted runtime environment.
- Implemented a frontend testing strategy with Jest, React Testing Library, and Playwright.
- Implemented accessibility improvements according to WCAG 2.2 and WAI-ARIA.
- Integrated Didomi Consent Management as a contribution to increasing ad monetization on streaming platforms.
- Used AI-supported engineering workflows with Cursor for structured implementation, refactoring, and faster problem solving.
Technologies used: React, Next.js, TypeScript, JavaScript, GraphQL, Apollo Gateway, Zustand, Tailwind CSS, Styled Components, React Testing Library, Playwright, Jest, HTML5, CSS3, AWS Lambda, EC2, CloudFront, S3, GitLab CI/CD, NX, Cursor
Wadim L.
Last position:
Fullstack Developer at dripwear.app
Development of an iOS app for virtual try-on and outfit suggestions
The goal of the project is to develop a mobile application for personalized, photorealistic outfit suggestions. Users should be able to upload their own photos, try on clothes virtually, and find products that can be bought directly in the generated suggestions.
- Planning and implementation of the onboarding and photo upload in the iOS app
- Development of the mobile application with Expo and React Native
- Implementation of a Hono/Node.js backend for user, product, and generation processes
- Building an asynchronous processing pipeline with BullMQ and Redis
- Connection of PostgreSQL/pgvector and S3 for product, image, and generation data
- Integration of Gemini and OpenAI for outfit generation and image processing
- Implementation of a credit system and integration of RevenueCat
- Integration of Stripe Connect and affiliate product feeds for products that can be bought directly
Label: TypeScript, React Native, Expo, Hono, Node.js, PostgreSQL/pgvector, BullMQ, Redis, S3, Gemini, OpenAI, RevenueCat, Stripe Connect, Docker
Murad H.
Last position:
Founder & Technical Lead at Hubpoint.Ai
- Founded an AI-powered scheduling and business-management SaaS for SMBs, owning technology strategy, architecture, product development, UX, billing and go-to-market execution.
- Architected and shipped a multi-tenant platform with REST APIs, RBAC, CRM, billing and notifications, powering the manager dashboard, admin console, booking experience and iOS/Android applications.
- Led and mentored 7 software engineers, 1 DevOps engineer, 1 QA engineer and 1 UX/UI designer, while remaining hands-on across backend, frontend and product delivery.
- Built AI voice and chat agents using Python/FastAPI, OpenAI and Anthropic APIs, RAG, pgvector and tool calling; integrated Twilio, Google Calendar/Meet, Stripe and Firebase.
- Owned production infrastructure and automated delivery across separate environments using Docker, Nginx, GitHub Actions and Grafana; represented the company at accelerators and international startup events.
Selected stack: Python, FastAPI, Node.js, Vue 3, React/Next.js, React Native, PostgreSQL, Redis, Docker
Matthias L.
Last position:
Full Stack & AI Engineer at Elephant Technologies
Loom and Bloom
Python · TypeScript · n8n · Claude Code · Whisper · Gemini · Supabase · Notion · HubSpot · Digital Ocean
- Built an end-to-end content pipeline: one Loom video → marketing images, bilingual LinkedIn posts, newsletter and Help Center updates.
- n8n webhook → SSH → Claude Code session on a Digital Ocean VPS; three MCP servers (video, Notion, Supabase).
- Whisper word-level transcription, ffmpeg screenshots, Gemini UI annotation, PIL device mockups.
- Next.js upload UI plus a bilingual newsletter composer with HubSpot push.
Michael S.
Last position:
Technical Lead, Development and Requirements Gathering at Decoupled frontend for a website in the pharmacy sector
- Ongoing support and further development.
Ibrahim H.
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.
Ingo K.
Last position:
Co-Founder & Managing Director at Elterngeld Buddy GmbH
- Responsible for the entire software architecture of the parental allowance portal
- iOS and Android app with React Native and Expo, incl. push and OTA updates
- Store releases via App Store Connect and Google Play Console
- TypeScript monorepo for app, website and backend, web with Next.js and Tailwind
- Own promo, voucher and discount engine with contact and segment logic
- Payments via RevenueCat and in-app purchases, authentication with BetterAuth
- REST APIs based on OpenAPI, PostgreSQL with Prisma and Drizzle
- Self-hosting on Hetzner with Docker, Coolify, Terraform and GitHub Actions
- Tests with Vitest, Playwright and visual regression via Chromatic
- Observability via Grafana Cloud and error tracking with Sentry
- Performance marketing via Meta Ads, measured with custom event tracking
- Grew the product to 20,000 app users with a purchase rate of almost 12 %
- Managing Director since 04.2025, responsible for product and technology
Adam R.
Last position:
Senior Software Engineer at Tonies GmbH
- Complete platform upgrade from Expo 53 to Expo 54, considering project-critical breaking changes
- Version bump of react-native 0.79.5 to 0.81.5 including consolidation, updating, and reinstalling all project-related dependencies (JavaScript, native modules, build tools, TypeScript tooling)
- Identifying and fixing incompatible libraries as well as adjusting iOS and Android configurations (Gradle, Pods, build scripts)
- Enabling and integrating the React Native New Architecture (TurboModules & Fabric) including adjusting native interfaces, build configurations, and feature flags
- Cleaning up technical debt and harmonizing platform-specific implementations to ensure long-term maintainability
- Stabilizing the project through detailed debugging, regression analysis, and adjustments to the tooling chain (Metro, Babel, TypeScript)
- Conducting comprehensive test cycles (unit, E2E, device tests) and optimizing CI/CD pipelines for Bitrise and GitLab
- Ensuring stable releases for Android & iOS in conjunction with analytics, engagement, and monitoring systems
Lloyd N.
Last position:
Lead Frontend Developer at AnzaKen
- Sole owner of all frontend architectural decisions, technology choices, component structure, build pipeline, and standards across the AnzaKen website and product builds
- Built production React components and coached a junior developer through component patterns, state management, and modern frontend practices via pair programming and code review
- Built products and internal tooling with React and Next.js using Claude Code, RAG pipelines, and AI guardrails, emphasizing maintainability, API integration, and delivery speed
- Participated in client pitches and discovery meetings, scoped technical needs, advised on feasibility, and shaped proposals
- Stack: React, TypeScript, Next.js, Node.js, Python, FastAPI, PostgreSQL, Claude Code, RAG, Vercel, Render
Julien L.
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
Umer D.
Last position:
Activation and Vocational Integration Program with Integrated Language Support at Berlitz
- Intensive language course with a focus on professional language content.
David M.
Last position:
Software Consultant at Getyourdrive
- Built modern web applications using React and NestJS.
- Developed frontend with React, TailwindCSS, shadcn/ui for elegant and responsive interfaces.
- Implemented backend APIs and authentication using NestJS and Node.js.
- Utilized AWS and Supabase for cloud deployments.
- Integrated Salesforce for CRM and data management.
Max D.
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
Tobias H.
Last position:
Solo Mobile Developer at The Event Verse
- Developed a new iOS access-control scanning app for security/gate staff to validate RFID wristbands/badges in real time
- Implemented an online/offline hybrid architecture: scans first hit the API, with a local SQLite fallback for full access policy evaluation (zone, direction, scan limits) offline
- Developed a native iOS RFID bridge: integrated a proprietary RFID SDK (QuantumSDK) via a custom Expo config plugin and native module; integrated with LineaPro Bluetooth scanner hardware
- Implemented real-time updates over WebSocket (Pusher protocol) including private-channel auth and exponential backoff reconnect for device-/gate-/event-based configuration changes
- Designed a three-tier persistence layer (Keychain/MMKV/SQLite) for secure credentials, fast state management, and offline-capable scan/credential data
- Developed incremental credential sync (cursor + updated_after) and batch upload of scan logs after reconnect to ensure consistent field data
Discover over 15,000 top freelancers
Statistics of experts using Expo
Aggregated from the professional profiles of matched freelancers.
Experience
14 years
Position duration
1.4 years
Positions per freelancer
13
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Healthcare, Banking and Finance
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
100%
Master's degree or higher
38%
Doctorate
6%
Certifications per freelancer
2
Most common languages
German, English, Spanish
Speak two or more languages
100%
Based on our profile pool as of 19 Sep 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 Expo
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 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Expo 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 (100%)
- Healthcare (64%)
- Banking and Finance (50%)
- Media and Entertainment (45%)
- Automotive (41%)
- Education (41%)
- Retail (41%)
- Manufacturing (36%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What Expo is
Expo is an open-source platform and framework for building React Native applications with JavaScript or TypeScript. It provides a managed foundation for iOS, Android and web projects, with standard APIs for device features such as cameras, notifications, location and secure storage. Teams can start quickly without maintaining every native configuration themselves.
What teams build
Expo supports customer-facing mobile apps, internal tools, commerce products, booking services and companion apps for existing web platforms. It suits prototypes that need a path to production as well as established products that require regular releases across mobile platforms.
- Cross-platform iOS and Android applications
- Mobile onboarding, authentication and account areas
- Push notifications, deep links and app navigation
- Camera, location, media and payment integrations
Ecosystem and tooling
The Expo ecosystem includes Expo Router for file-based navigation, Expo SDK modules and EAS for cloud builds, submissions and updates. Strong specialists also work with React, React Native, TypeScript, state management, testing, REST or GraphQL APIs and app-store release processes. They understand when a project needs a custom native module or a prebuild configuration.
When expertise matters
Companies often bring in freelance Expo specialists when a mobile product must launch quickly, when a React Native codebase needs a controlled upgrade, or when a web team is expanding into native apps. Expertise is also valuable during app-store preparation, build-pipeline changes, performance work and integrations with device services.
In Germany, remote collaboration is common, while some teams need on-site workshops for product discovery, release planning or coordination with internal mobile and product groups. Clear English is widely useful, with German helpful when specialists work closely with local stakeholders.
Signs of strong specialists
- They can explain the trade-offs between managed Expo workflows and custom native code
- They structure navigation, data flow and TypeScript types for long-term maintenance
- They automate builds, signing, submissions and update delivery with EAS
- They test on real devices and investigate platform-specific behavior
- They protect credentials, permissions and personal data in mobile flows
Choosing the right fit
Look for professionals who can show shipped Expo applications and explain their contribution to architecture, releases and operational support. Ask how they handle native dependencies, offline states, crash diagnosis, accessibility and store review requirements. The best fit connects product goals with practical decisions about Expo SDK modules, React Native behavior and the surrounding delivery process.
Frequently asked questions
The facts hiring teams ask for most often when it comes to Expo.
Expo is used to build and release cross-platform mobile applications with React Native. It provides APIs for device capabilities, navigation, updates and app delivery, helping teams share much of their code between iOS and Android.
Expo adds a managed development layer, SDK modules and EAS services around React Native. Plain React Native can offer more direct control over native projects, while Expo can reduce setup and release overhead; the right choice depends on native requirements and the team’s operating model.
Expo work usually benefits from React, React Native, TypeScript, mobile navigation and API integration skills. Experience with authentication, testing, accessibility, app-store processes and EAS Build is also valuable for production projects.
Expo projects vary from focused prototypes to complex mobile products with native integrations. A specialist should understand the project’s release process, data flows and device requirements before recommending the appropriate level of expertise.
Expo projects are well suited to remote collaboration because source code, builds and reviews can be managed online. Teams in Germany may still prefer on-site sessions for discovery or coordination, so agree on working hours, documentation and language expectations early.
Expo can cover many common device features through its SDK, but a project may need custom native work for an unsupported hardware integration or a specialized platform service. An experienced specialist can assess whether an existing module, a config plugin or native code is the most maintainable option.
Expo quality is visible in reliable builds, clear TypeScript structure, responsive screens and predictable behavior on real iOS and Android devices. Review how the specialist handles permissions, offline states, errors, updates, testing and app-store releases rather than judging only the visual result.
Expo specialists should clarify the SDK setup, navigation approach, native dependencies, release ownership and expectations for EAS. They should also check whether the project uses a managed workflow, prebuild configuration or custom native folders, since that affects implementation and maintenance.
The average hourly rate of freelancers in Germany who have used Expo in their recent projects is 91 €, which corresponds to a daily rate of about 726 € based on an 8-hour working day.
Of the freelancers in Germany who have used Expo in their recent projects, 100% hold at least a Bachelor's degree, 38% hold at least a Master's degree, and 6% hold a doctorate.
On average, freelancers in Germany who have used Expo in their recent projects have 14 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 Expo in their recent projects are German (100%), English (95%), and Spanish (14%).
The most common industries among freelancers in Germany who have used Expo in their recent projects are Information Technology (100%), Healthcare (64%), and Banking and Finance (50%).
The most common business areas among freelancers in Germany who have used Expo in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (64%).
Main locations of FRATCH Experts, who have recently used Expo
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 
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