OkHttp Experts in Germany
in minutes from over 15,000 CVs with the power of AI.Hire experts who build reliable HTTP clients, handle interceptors and caching, and tune mobile and backend network calls with OkHttp, Retrofit, and TLS setups. Get fast, precise matching with vetted, available freelancers.
Meet FRATCH Experts in Germany, who have recently used OkHttp
Sabahattin Kunas
Last position:
Sole responsibility (concept, development, infrastructure, operations) at Own project busik.ch
- Ride-sharing and bus platform, live and working. Backend Spring Boot 4.1 on Java 21, PostgreSQL with Flyway, Testcontainers integration tests. Running in my own AWS account (ECS Fargate, ALB, ECR, IAM least privilege) with CI/CD via GitHub Actions and OIDC federation without static credentials. Development throughout AI-assisted with Claude Code, including my own skills and project-specific memory. Spring Boot · Java 21 · PostgreSQL · Flyway · Docker · AWS ECS/ALB/ECR · CI/CD · GitHub Actions · Claude Code
Ayhan Gezer
Last position:
Senior QA Engineer / Test Automation Engineer / SDET at Rewe digital
Consulting, designing, and implementing the software testing lifecycle for multiple Android apps and backends Introducing test automation with Appium, SpringBootTest, RestAssured Setting up and managing emulators Developing an E2E library, an integration library, a Testcontainers library, and other libraries Developing, implementing, and advising on CI strategies Building the test environment with Testcontainers and virtualization Developing and implementing test cases for integration tests and end-to-end tests Establishing a maintainable test architecture with low entry barriers to simplify the creation of automated tests Some tools and technologies used: JUnit, RestAssured, Testcontainers, Kubedock, Appium, Android emulator, Jira Xray, Mockito, WireMock, Spring Framework, Kotlin
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
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.
Md. Shah Samir
Last position:
Android Engineer at ScrapBays Ltd.
- Built features using Jetpack Compose
- Improved location-based features with in-memory caching
- Developed Merchant-to-Merchant chat functionality from scratch
- Integrated FCM with deep links to enable contextual push notifications
- Performance tuning for Google Maps view using clustering for better performance in dense areas
Ioan Dobre
Last position:
Senior Software Developer at ING
- Tribe Home, Product Area 4 - Customer in Life, Squad Cybertron.
- Analysis, design, development, and testing of new requirements for Optimmo, mortgage financing software.
- Analysis, design, development, and testing of the JEE application MWS kredit-baufi.
- Analysis, design, development, and testing of the Wicket Optimmo application.
- Analysis, design, development, and testing of kredit-baufi batch programs.
- Migration of kredit-baufi batches to RHEL9.
- CiL SCS consumer pacts with Finagle.
- CiL SCS touch point architecture integration.
- Team size: 10.
- Tools / Frameworks: OpenJDK Java 17, Kotlin 1.6.0, Azure, Jenkins, Stash, JEE, GitLab, JIRA, Confluence, git, Spring 6.0, Spring Cloud, Spring Data, Hibernate, JPA, JMS, Kafka, Oracle, PL/SQL, Red Hat Enterprise Linux (RHEL), Maven, REST, JBoss, IntelliJ IDEA, Wicket 9 and 10, Istio.
Rafael Kolloch
Last position:
Senior Android Developer / Team-Lead at IBM Deutschland
- Further development and release support of a white-label e-prescription component for health insurance companies
- Technologies: Android (Kotlin), Kotlin Multiplatform, Coroutines, Jetpack Compose, MVVM, StateFlow, Gradle, ProGuard
Discover over 15,000 top freelancers
Statistics of experts using OkHttp
Aggregated from the professional profiles of matched freelancers.
Experience
15 years
Position duration
1.8 years
Positions per freelancer
15
Top business areas
Information Technology, Product Development, Business Intelligence
Top industries
Information Technology, Insurance, Transportation
Bachelor's degree or higher
83%
Master's degree or higher
50%
Certifications per freelancer
0
Most common languages
German, English, Turkish
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 OkHttp
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
HTTP client work
OkHttp is a widely used HTTP client for Java and Kotlin. It is built for clean request handling, connection reuse, cookies, caching, and resilient network calls in apps and services.
Where it fits
It is common in Android apps, service integrations, and backend code that talks to REST APIs.
- API consumption
- File upload and download flows
- Authenticated requests
- Retry and timeout handling
Core skills
Strong OkHttp specialists understand request builders, interceptors, authenticators, TLS, and logging. They also know how OkHttp works with Retrofit, Gson, Moshi, and Kotlin coroutines.
What good work looks like
A good specialist keeps networking code predictable and easy to debug. They avoid duplicate calls, manage error responses clearly, and keep sensitive data out of logs.
- Custom interceptors
- Cache control
- Certificate handling
- Request tracing
When to bring in help
Companies usually need freelance expertise when network code becomes hard to maintain, a mobile release depends on stable API calls, or integrations keep failing in production. In Germany, that often includes product teams that need remote support, clear documentation, and smooth handoff to internal experts.
Ecosystem and delivery
OkHttp often appears in Android stacks, JVM services, and API-heavy products. Freelancers may review existing client code, add new endpoints, harden error handling, or support migration from older networking libraries while keeping behavior stable.
Frequently asked questions
Questions about OkHttp? Start with the answers below.
OkHttp is used to send and manage HTTP requests in Java and Kotlin projects. Teams use it for API calls, authentication, caching, file transfer, and network error handling. It is especially common in Android apps and JVM services.
OkHttp is the lower-level networking layer, while Retrofit usually sits on top of it to make API interfaces simpler. Compared with Apache HttpClient, it is modern, lightweight, and a common choice in Kotlin and Android work. Many teams use OkHttp directly for custom control and Retrofit for typed API clients.
A strong OkHttp specialist usually knows REST APIs, JSON parsing, TLS, interceptors, cookies, caching, and timeout handling. Kotlin is very helpful, and Java still matters in many JVM codebases. Experience with Retrofit and mobile networking patterns is often important too.
You do not need a specialist for every simple API call, but you do need one when requests must be reliable, secure, and easy to debug. OkHttp expertise matters when you handle auth flows, custom headers, retries, certificate pinning, or tricky offline behavior. It also helps when network code is spread across an app and hard to maintain.
Yes, OkHttp work is often done remotely because the task depends more on code access, tickets, and clear communication than on location. For teams in Germany, remote collaboration works well when requirements are written clearly and handoff expectations are simple. On-site time is mainly useful for complex debugging sessions or tight product deadlines.
A good OkHttp freelancer explains the network flow clearly, not just the final code change. Look for solid handling of errors, timeouts, logging, and security details such as headers and certificates. They should also write code that is easy for other experts to maintain.
OkHttp specialists often fix duplicate requests, stale caches, bad timeout settings, and weak error handling. They also clean up interceptor chains, authentication refresh logic, and upload or download failures. In mobile projects, they may also reduce flaky behavior caused by unstable networks.
Yes, OkHttp is still a strong choice when you want a reliable HTTP client with a clear API and mature ecosystem support. It fits well in Kotlin and Android projects, and it also works well in JVM services that need direct control over requests. For many teams, it remains the practical default for custom networking.
The average hourly rate of freelancers in Germany who have used OkHttp in their recent projects is 89 €, which corresponds to a daily rate of about 712 € based on an 8-hour working day.
Of the freelancers in Germany who have used OkHttp in their recent projects, 83% hold at least a Bachelor's degree and 50% hold at least a Master's degree.
On average, freelancers in Germany who have used OkHttp in their recent projects have 15 years of professional experience, with a single engagement typically lasting around 1.8 years.
The most common languages among freelancers in Germany who have used OkHttp in their recent projects are German (100%), English (100%), and Turkish (29%).
The most common industries among freelancers in Germany who have used OkHttp in their recent projects are Information Technology (100%), Insurance (71%), and Transportation (71%).
The most common business areas among freelancers in Germany who have used OkHttp in their recent projects are Information Technology (100%), Product Development (100%), and Business Intelligence (43%).
Main locations of FRATCH Experts, who have recently used OkHttp
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
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Philipp Thomaschewski
FRATCH CEO
