REST API Experts in Hanover
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Meet FRATCH Experts in Hanover, who have recently used REST API
Priyanka Sarang
Last position:
Business Consultant (Software Engineering) at Boehringer Ingelheim
- Developed cloud-native enterprise applications on SAP Business Technology Platform using Node.js, SAP UI5, and RESTful APIs, delivering solutions across training management, procurement, employee information, and logistics domains
- Served as the primary developer for the maintenance, enhancement, and production support of three enterprise applications, delivering new features, resolving production issues, and coordinating releases with business stakeholders
- Experienced in leveraging AI-assisted development tools such as Microsoft Copilot to accelerate feature development, generate code, prototype solutions, and support application migration and modernization
- Designed backend services, domain models, and SAP Fiori/UI5 interfaces, implementing business workflows, role-based access control, validations, scheduling, reporting, and data import/export capabilities
- Designed and integrated enterprise services with SAP SuccessFactors, SailPoint, ERP systems, and external Learning Management APIs, including automated synchronization for 11,000+ user data
- Designed and implemented AMQP-based event-driven services processing up to 500 RFID parcel scan events per day for a logistics application
- Managed deployments and application operations using CI/CD pipelines, SAP Solution Manager, SAP BTP Cockpit, Kibana, and cloud monitoring tools, performing root-cause analysis and resolving production incidents
- Managed application dependencies by resolving npm package version conflicts and remediating critical and high-severity security vulnerabilities, ensuring production compliance and application stability
- Collaborated with architects, business users, SAP governance teams, and distributed Agile teams throughout technical design, code reviews, sprint planning, documentation, and software delivery
Martin Schaefer
Last position:
MS Fabric Certification
MS Fabric certification with creation of pipelines and notebooks in Fabric using data from Azure, Azure Repos, Azure Boards, and GitHub. Data ingestion via OneLake Explorer, direct IP connection, and API (REST) are the main topics
Bastian Bührig
Last position:
Backend Developer at SupplyOn AG
In this project, I support the software development of various modules of the supply chain management solution. My responsibilities include the technical implementation and optimization of collaborative SCM processes that help companies make their supply chains more efficient, transparent, and resilient. This modular software platform facilitates communication and Collaboration with suppliers is standardized and digitized, enabling seamless traceability of quality data and supplier evaluations. Technically, I focus on development with Go/Golang for scalable backend services and on the use of Kafka for real-time messaging and event processing. I design and extend GraphQL interfaces for efficient data communication between microservices and support automated build and deployment management using Docker and Gitlab CI/CD pipelines. Data is stored in the modules I work on using a PostgreSQL database.
Technical focus: Go/Golang, Kafka, GraphQL, Docker, Gitlab, CI/CD, DevOps, PostgreSQL, JIRA, Miro
Martin Zander
Last position:
Consulting, Design and Development at ivv GmbH
- Design, development and maintenance of a web application as a policy management system based on a JEE backend and a Vaadin-based UI
- Design and development of interfaces
- Integration of databases
- Design and development of unit and integration tests
- Conceptual coordination with the client
- Technologies and methods: JEE, Vaadin, EJB, Innovator, Hibernate, REST, JMS, SQL, MQ, Maven, Selenium, Arquillian, Mockito, JUnit, Log4j, OOA, OOD, Scrum, Kanban, JavaScript, HTML, CSS, Jenkins, Jenkins Pipelines, Git, GitLab, Subversion, Jira, Confluence, DB2, WebLogic
Marwan Blazek
Last position:
Full-Stack Developer, Business Analyst at HDI Deutschland AG
- Backend development with Spring Boot (Java) for health and VH
- Frontend development with Angular (TypeScript) for health and VH
- Implementation of REST services incl. business logic in the backend, development of frontend components
- Building build and deployment pipelines (GitLab CI/CD)
- Business and technical requirements analysis, maintenance of user stories, stakeholder management
- Coordination with IT architecture, UX design (mockups with Balsamiq)
- Creating interface definitions (OpenAPI), Camunda process modeling (BPMN)
- 8 years of consulting for insurance companies: property & liability (private, corporate)
Timo Götte
Last position:
S/4HANA Project Management, Board and Strategy Consulting at Services
- S/4HANA project management: book project with an online hub to derive an agile project management methodology (Scrum) based on SAP Activate, Solution Manager Focused Build, SAP Enable Now, many SAP project accelerators, community solutions and custom developments.
- Strategy consulting: overview of service providers and product vendors as well as demos and videos to present best practice processes, cloud solutions and SAP community products.
- Sales structure development: scaling the network organization via partnerships, public relations (PR), marketing, digital events etc.
- Contract terms & general terms and conditions: manufacturing and service contracts, personnel placement contracts, copyrights etc.
Marvin Woischnik-Lange
Last position:
PACS Senior IT Project Manager at Fraport / ID Engineering
- Took a leading role integrating NECT Ident and NECT Sign (AI-based solutions for identity verification and electronic signature) into ID Engineering's PostgreSQL PACS (Physical Access Control System) used at Fraport.
- Analyzed system architecture and interfaces, and implemented Microsoft Azure REST API integrations for legally compliant identity verification and signature.
- Developed and implemented security-critical workflows in Visual Studio Code to seamlessly embed NECT processes into existing PACS Mulesoft Anypoint Platform™ structures.
- Contributed to the evolution of the airport security architecture by linking identity verification, ID management, and physical access control with Microsoft Power BI.
- Collaborated closely with NECT and internal IT teams on API configuration, testing, and production rollout.
Frank Nitze
Last position:
Developer at In-house development of the HAPPYLIST web application
- Fully developed a CRM system for contact management in network marketing
- Enabled configuration of tags, custom reminders, birthday reminders and more
- Application is productive
- Technologies and methods: Trello, Python, Django, Rest-Framework, Bootstrap, PostgreSQL
Discover over 15,000 top freelancers
Statistics of experts using REST API
Aggregated from the professional profiles of matched freelancers.
Experience
19 years (Germany: 17 years)
Position duration
1.9 years (Germany: 2.9 years)
Positions per freelancer
13 (Germany: 12)
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Automotive
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
86% (Germany: 91%)
Master's degree or higher
29% (Germany: 54%)
Doctorate
14% (Germany: 7%)
Certifications per freelancer
3
Most common languages
German, English, Spanish
Speak two or more languages
88% (Germany: 96%)
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 Hanover 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 Hanover using REST API
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 it is
REST API work is about building clear interfaces between systems over HTTP. It lets apps, services, and devices exchange data in a predictable way. Teams use it for public APIs, internal service layers, partner connections, and mobile back ends.
Common deliverables
- Endpoint design and resource modeling
- Authentication and authorization flows
- OpenAPI/Swagger documentation
- Versioning and backward compatibility
- Error handling and response contracts
Where it fits
REST API specialists often support commerce, logistics, SaaS, manufacturing, and data products. In Hanover, they may work with companies that need stable integrations across internal systems, supplier portals, or customer-facing services. The focus is usually on dependable exchange, not flashy interfaces.
Related stack
Strong professionals usually know more than the API style itself. They work with JSON, HTTP methods, status codes, OAuth, OpenAPI, Postman, and tools for testing and monitoring. Many also understand the backend systems behind the API, so the contract fits the real data model.
When to bring in help
Bring in freelance expertise when a new API must be designed well from the start, an existing one needs cleanup, or partners keep asking for changes. It also helps when security, versioning, or documentation has become hard to maintain. Short-term support is common for launches, migrations, and audits.
What strong experts do
Good REST API professionals write for other teams, not just for code. They keep resource names consistent, avoid breaking changes, and think about caching, pagination, idempotency, and test coverage. They also explain trade-offs clearly, which matters when product, backend, and frontend teams need to align.
Frequently asked questions
What clients ask us most about REST API — answered in short.
A strong REST API is used to move data between systems through simple HTTP requests. Companies rely on it for mobile apps, web front ends, partner integrations, and internal service communication. It is a practical choice when teams need a clear contract and predictable behavior.
A REST API is often the better fit when you want straightforward resources, caching, and easier operational control. GraphQL can help when clients need flexible queries, but it adds another layer of complexity. Many teams keep REST for core services and use GraphQL only where it truly helps.
A REST API specialist should understand HTTP methods, status codes, JSON, authentication, and API documentation. Look for experience with OpenAPI, testing tools like Postman, and versioning strategies. Good specialists also know how to design contracts that are stable for other teams to consume.
A REST API project that only needs a few endpoints may be handled by a general backend specialist. If the API will serve many clients, partners, or external consumers, you want someone who has worked on design, security, and long-term maintenance. The more critical the interface, the more valuable senior judgment becomes.
Yes, most REST API work can be done remotely because the core tasks are design, implementation, testing, and documentation. On-site collaboration can still help during early discovery, architecture reviews, or when teams need quick alignment with product and other specialists. For Hanover, a mixed setup is common if the project needs it.
A strong REST API expert can explain why the contract looks the way it does, not just show the code. Look for clean resource naming, sensible error handling, versioning, and documentation that another team can actually use. Good specialists also test edge cases and think about future changes before they become a problem.
REST API and RESTful API are usually used to mean the same kind of interface. In practice, people use REST API as the shorter and more common term, while RESTful API emphasizes that the design follows REST principles. When you hire, what matters is the actual contract style and how well it is implemented.
A REST API project often includes OpenAPI, Swagger, JSON Schema, OAuth, Postman, and monitoring tools. Depending on the stack, a specialist may also work with API gateways, caching, logging, and test automation. These pieces help keep the interface secure, documented, and easy to maintain.
The average hourly rate of freelancers in Hanover, Germany who have used REST API in their recent projects is 90 €, which corresponds to a daily rate of about 720 € based on an 8-hour working day.
Of the freelancers in Hanover, Germany who have used REST API in their recent projects, 86% hold at least a Bachelor's degree, 29% hold at least a Master's degree, and 14% hold a doctorate.
On average, freelancers in Hanover, Germany who have used REST API in their recent projects have 19 years of professional experience, with a single engagement typically lasting around 1.9 years.
The most common languages among freelancers in Hanover, Germany who have used REST API in their recent projects are German (100%), English (75%), and Spanish (13%).
The most common industries among freelancers in Hanover, Germany who have used REST API in their recent projects are Information Technology (100%), Banking and Finance (63%), and Automotive (50%).
The most common business areas among freelancers in Hanover, Germany who have used REST API in their recent projects are Information Technology (100%), Product Development (75%), and Quality Assurance (63%).
Main locations of FRATCH Experts, who have recently used REST API
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 
Nuremberg Request a free demo
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