REST API Experts in Bremen
matched in minutes from over 15,000 CVsHire experts who design reliable REST endpoints, connect web and mobile applications, and integrate business systems through secure APIs. FRATCH matches you quickly and precisely with vetted, available freelancers for your project.
Meet FRATCH Experts in Bremen, who have recently used REST API
Kathrin S.
Last position:
Requirements Engineer at Governikus GmbH & Co. KG
- Impact: Structured requirements analysis and quality assurance as a foundation for the further development of a software solution.
- Analysis, documentation, and coordination of requirements. Conducting stakeholder analyses, interviews, and workshops to gather and validate requirements. Conducting requirements reviews and working closely with business departments and development teams.
Techniques & Tools: Requirements Engineering, Stakeholder Management, Workshop Facilitation, System Context Modeling, Requirements Reviews, Quality Scenarios, Miro, Jira, Confluence
Eric K.
Last position:
Digital roadside assistance platform at SABK
Timo K.
Last position:
Senior Fullstack Developer
- Lead Developer / Tech Lead in a large banking group for a complete redevelopment of payment systems
- Rebuilding payment processing in stream processing
- Development and design of cross-border payment stream processing based on Kafka and Kafka Streams
- Development of different input formats for the business team using Drools rules to dynamically adjust validation rules
- Evaluation and comparison of different public cloud providers regarding the databases they offer
- Technologies & Tools: Java 21, Kotlin, Spring Boot, Kafka, Kubernetes, Azure, TDD, JEE, REST, Angular, Spark, Google Cloud, SCDF, PostgreSQL, Drools, Git, S3, MongoDB
Dimitri S.
Last position:
Fullstack Developer, Integrator at Generali Deutschland Versicherung AG
- Developing automated build and deployment processes for the exclusive front office systems
- Integrating the front office systems into the IT infrastructure
- Developing innovative, user-friendly sales software for financial advisors
- Ensuring quality and flexibility through automation and working with CI/CD
- Working according to DevOps principles
- Operating the software together as a team in the AWS cloud and Azure cloud
- Deploying software artifacts to testing and production environments
- Maintaining the test environments
- Performing error analysis and providing information for further root cause analysis
- Maintaining and supporting the build pipeline
- Supporting load testing
- Coordinating the batch execution schedule with batch automation
- Creating concepts to further develop the software packaging process
- Building and delivering components to partners
- Developing GitLab and Jenkins pipelines for building, deploying and integrating components
- Automating processes with Spring Boot applications with a GUI (Thymeleaf, Angular 19)
- Developing RESTful Spring Boot applications with Kotlin and Angular 19, JDBC and REST accesses, data exchange via SFTP, XML (JAXB)
- Designing components using Domain-Driven Design (DDD)
- Replacing cmd and bash scripts with Spring Boot applications with a GUI
- Replacing Java 8 applications with JSP by Spring Boot 3 applications (Thymeleaf, Angular)
- Implementing frontend and backend authentication via Keycloak
- Writing JUnit tests with Mockito
- Increasing code coverage for SonarQube analysis
Nandini V.
Last position:
Senior Software Developer at Capgemini Technology Services Limited
- Designed and implemented secure backend services using Java, Spring Boot, and Hibernate, following microservice principles and RESTful standards.
- Implemented GraphQL-driven REST APIs to streamline backend services in a Gradle and Maven environment.
- Implemented OAuth2-based authentication and authorization mechanisms to secure RESTful APIs in Spring Boot applications.
Juri S.
Last position:
Software Development at Banking Environment
- Extension of an existing application with new customer requirements.
- AlmaLinux, Ubuntu; C, gcc; Oracle;
- Socket/TCP communication.
- CLion, Eclipse
- Git
Aschok D.
Last position:
Fullstack Developer at Netkitchen GmbH
- Backend & Frontend development (Full-Stack)
- PHP, MySQL, Laravel, Symfony, Twig, Vue.js, ExtJS, jQuery, JavaScript/TypeScript, HTML5, CSS3, Smarty
- Fact-Finder, Git, Jira, Jenkins, Scrum
- Based on Shopware 5 & 6
- ERP system integration
- Experience with REST APIs
- Developed a Laravel script to migrate all data (products, product images, orders, customers, prices, etc.) from Shopware 5 to Shopware 6
- Able to develop any kind of Shopware 6 and Shopware 5 plugins
Alexander E.
Last position:
Founder & Managing Director at Graphek GmbH
UI/UX / Development of custom applications, APIs and WordPress themes in frontend and backend
Technologies and skills: WordPress, WooCommerce, Gulp, MySQL, Ajax, Git, Vanilla JS, Composer, REST, HTML5, CSS3, PHP, Laravel, jQuery, VueJS, LESS, SASS, CSS Animations, UI/UX, Wireframes, Prototyping, Design Thinking, Web Design, App Design, Concepts, Responsive, Cross-Browser, Performance, SEO, Google Adwords
Key projects:
- OBI App UI/UX concept with integrated market navigation including design system build (2019-2020, 12 months)
- SVG animations and landing pages development (2018-2019, 6 months)
- Tönnjes Group websites maintenance and development (2019-present, 28+ months)
- AboutYou shop system concept, design & development (2018, 6 months)
- Tesa website UI/micro-macro interactions and design system (2021, 7 months)
- Sixt limousine service website UI/UX (2018-2019, 5 months)
- WordPress website development and maintenance (2020-2022, 24 months)
- HanseMerkur partners web development and SEO (2023-present)
- VW cars maintenance app concept, design system, wireframing, clickdummies (2023, 6 months)
- Animation design and conception (2020-2022, 2 years)
Discover over 15,000 top freelancers
Statistics of experts using REST API
Aggregated from the professional profiles of matched freelancers.
Experience
17 years
Position duration
2.4 years (Germany: 2.9 years)
Positions per freelancer
14 (Germany: 12)
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Automotive, Transportation
Certification focus areas
Information Technology, Human Resources, Operations
Bachelor's degree or higher
100% (Germany: 92%)
Master's degree or higher
86% (Germany: 55%)
Certifications per freelancer
3
Most common languages
German, English, Spanish
Speak two or more languages
100% (Germany: 97%)
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 Bremen 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 Bremen 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 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
REST API 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%)
- Automotive (50%)
- Transportation (50%)
- Manufacturing (50%)
- Banking and Finance (38%)
- Insurance (38%)
- Government and Administration (38%)
- Retail (38%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What REST API means
A REST API is a web-based interface that lets software exchange data and trigger actions through standard HTTP requests. It commonly uses resources, predictable URLs, JSON payloads and status codes, making services accessible to web apps, mobile products, partner systems and internal tools. REST API specialists turn business rules into stable, documented interfaces.
Where it is used
REST APIs connect the parts of a digital product and expose selected capabilities to other systems. Common deliverables include:
- Backend services for web and mobile applications
- Integrations with CRM, ERP, payment and logistics systems
- Public APIs for partners, customers and external applications
- Internal services for data exchange and workflow automation
They support industries such as manufacturing, logistics, retail, finance and healthcare. Companies in Bremen may use this expertise to connect local operations with cloud applications and distributed teams.
Ecosystem and tooling
Strong REST API work covers more than endpoint creation. Professionals work with HTTP, JSON, authentication schemes, relational and document databases, API gateways, queues and cloud infrastructure. OpenAPI specifications, Postman, automated test suites and observability tools help teams document, validate and monitor each interface. Framework choices depend on the existing backend ecosystem and delivery goals.
When to hire specialists
Freelance expertise is useful when an API is becoming a product boundary rather than a small integration. Bring in a specialist when requirements are unclear, several clients depend on one interface, or an existing service suffers from breaking changes and weak documentation. A professional can assess the current design, define a migration path and leave practical standards for the internal team.
Reliable delivery signals
Quality shows in consistent resource modelling, clear status codes, useful error responses and stable versioning decisions. Strong professionals also address authentication, authorization, input validation, rate limits, pagination, caching and sensitive data. They test failure cases, document assumptions and make interfaces understandable for the teams consuming them. In remote or on-site work in Bremen, clear written decisions and regular contract reviews keep collaboration effective.
Choosing the right expert
Look for evidence of APIs used in production, not only isolated endpoints. Ask how the specialist handles backward compatibility, idempotency, security reviews, monitoring and contract testing. A good fit understands both technical constraints and the business process behind each resource. They should also work comfortably with existing source control, deployment pipelines and team conventions, while explaining trade-offs in plain language.
Frequently asked questions
Key details about REST API, drawn from the questions we get asked most.
A REST API lets separate software systems communicate over HTTP using resources, requests and responses. Companies use it to connect web and mobile applications with databases, internal services, partner systems and SaaS tools.
REST API usually exposes resource-oriented endpoints and returns representations such as JSON, while GraphQL lets clients request a tailored data shape from a shared schema. SOAP relies on formal XML messages and enterprise standards, so the right choice depends on compatibility, governance, client needs and system complexity.
A strong REST API specialist should understand HTTP, JSON, databases, authentication, automated testing and deployment pipelines. Experience with OpenAPI, API gateways, cloud services, observability and frontend or mobile integration is also valuable.
The required background depends on the scope and risk of the interface. For a small internal integration, focused delivery experience may be enough; a public or business-critical REST API requires proven work with versioning, security, resilience, documentation and support.
Yes, REST API projects are well suited to remote collaboration when repositories, specifications, environments and decisions are shared clearly. On-site sessions in Bremen can help with discovery and architecture, while implementation, testing and reviews can usually continue remotely.
Review whether the REST API has coherent resources, predictable responses, useful errors, secure access and clear documentation. Ask for examples of automated tests, contract validation, monitoring and safe changes without disrupting existing consumers.
Yes, REST API work should include authentication and authorization, input validation, transport security, secret handling and protection against abuse. The specialist should also understand data minimization, audit needs and how security controls fit the surrounding application.
Before starting REST API work, clarify the consumers, business actions, data ownership, authentication model, performance expectations and deployment process. Also agree on documentation, testing responsibilities, compatibility rules and how changes will be communicated.
The average hourly rate of freelancers in Bremen, Germany who have used REST API in their recent projects is 86 €, which corresponds to a daily rate of about 687 € based on an 8-hour working day.
Of the freelancers in Bremen, Germany who have used REST API in their recent projects, 100% hold at least a Bachelor's degree and 86% hold at least a Master's degree.
On average, freelancers in Bremen, Germany who have used REST API in their recent projects have 17 years of professional experience, with a single engagement typically lasting around 2.4 years.
The most common languages among freelancers in Bremen, Germany who have used REST API in their recent projects are German (100%), English (100%), and Spanish (25%).
The most common industries among freelancers in Bremen, Germany who have used REST API in their recent projects are Information Technology (100%), Automotive (50%), and Transportation (50%).
The most common business areas among freelancers in Bremen, Germany who have used REST API in their recent projects are Information Technology (100%), Product Development (100%), 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.
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Nuremberg Request a free demo
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