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REST API Experts in Bremen

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Hire experts who design clean REST endpoints, connect services through JSON and HTTP, and improve existing API contracts for web and mobile products. Get fast, precise matching with vetted, available freelancers.

Meet FRATCH Experts in Bremen, who have recently used REST API

Verified expert

Dimitri Simon

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Fullstack Developer, Integrator

Bremen
Dimitri Simon

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
Verified expert

Nandini Venkatesh

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Senior Software Developer

Bremen
Nandini Venkatesh

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.
Verified expert

Aschok Das

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Fullstack Developer

Bremen
Aschok Das

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
Verified expert

Timo Külbel

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Senior Fullstack Developer

Bremen
Timo Külbel

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

Discover over 15,000 top freelancers

Statistics of experts using REST API

Aggregated from the professional profiles of matched freelancers.

Experience

16 years (Germany: 17 years)

Position duration

2.7 years (Germany: 2.9 years)

Positions per freelancer

10 (Germany: 12)

Top business areas

Information Technology, Product Development, Quality Assurance

Top industries

Information Technology, Manufacturing, Retail

Bachelor's degree or higher

100% (Germany: 91%)

Master's degree or higher

80% (Germany: 54%)

Certifications per freelancer

2 (Germany: 3)

Most common languages

German, English, Spanish

Speak two or more languages

100% (Germany: 96%)

Based on our profile pool as of 30 Aug 2026.

Daily rate distribution

0 1 2 3 4
<€320 €480-​560 €640-​720 €720+

The chart shows how the daily rates of freelancers in this technology in Bremen 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 Bremen using REST API

Rates are based on recent contracts and do not include FRATCH margin.

800
600
400
200
Rate comparison chart
Daily rate avg. 678 €
Germany avg. 737 €

The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.

800
600
400
200
Rate comparison chart
Median rate 712 €
Germany median 736 €

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 is a way to let systems exchange data over HTTP in a clear, stateless format. Teams use it to connect frontends, mobile apps, partner systems, and internal services. It fits products that need simple request and response flows.

Typical work

  • Design endpoint structure and resource naming
  • Define request and response formats in JSON
  • Add authentication, versioning, and error handling
  • Document endpoints for internal teams and partners
  • Review existing APIs for clarity and consistency

Stack around it

Strong specialists know HTTP methods, status codes, JSON, OpenAPI, and tools such as Swagger or Postman. They also understand how APIs fit into authentication, logging, caching, and service boundaries. Good work here is as much about communication as code.

When to bring in help

Companies usually bring in freelance expertise when an API needs to be designed, cleaned up, or integrated under time pressure. That also applies when a product team in Bremen must align backend and frontend work, or when outside partners need stable access without long handovers.

What good looks like

A strong REST API specialist writes consistent contracts and keeps responses predictable. They think about versioning, security, and long-term maintainability from the start. They also spot where a REST approach is enough and where another integration style may fit better.

Industries and delivery

REST API work appears in e-commerce, logistics, SaaS, manufacturing, and connected services. Deliverables often include API specs, implementation support, testing guidance, and documentation that other teams can actually use. Clear delivery matters when systems must work across departments or across company borders.

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Frequently asked questions

Key details about REST API, drawn from the questions we get asked most.

A strong REST API connects software that needs to exchange data over the web. Companies use it for web apps, mobile apps, partner integrations, and internal service communication. It is a common choice when the goal is a clean, predictable interface over HTTP.

REST API is usually simpler to understand and easier to expose to many clients. GraphQL can help when clients need flexible data selection, while SOAP is still seen in some older enterprise environments. The right choice depends on how stable the data model is and who consumes the service.

A good REST API specialist also knows HTTP, JSON, authentication, OpenAPI, and testing tools like Postman. Experience with backend systems, security basics, and versioning helps a lot. For many projects, clear documentation is just as important as implementation.

A small REST API task may need someone who can review an existing endpoint set or add a few integrations. A larger product effort needs someone who can shape the contract, error model, security, and rollout plan. The more systems depend on it, the more important design experience becomes.

Yes, REST API work is often well suited to remote collaboration because most tasks are specification, review, and integration driven. For Bremen teams, a hybrid setup can help when the specialist needs direct access to stakeholders or local systems. Clear written communication matters either way.

A strong REST API expert makes interfaces consistent, easy to use, and easy to maintain. Look for clean resource naming, sensible status codes, good error messages, and documentation that matches the actual behavior. The best sign is that other teams can use the API without repeated clarification.

Often yes, REST API is still a practical default for new products that need straightforward integrations. It works well when teams want wide client support and a clear contract. If the use case needs very flexible querying or streaming, another approach may fit better.

Before starting a REST API project, a freelancer should review the current endpoints, authentication rules, data models, and documentation. Access to examples, existing tests, and known integration issues saves time. In Bremen projects, it also helps to know whether stakeholders expect workshops in English, German, or both.

The average hourly rate of freelancers in Bremen, Germany who have used REST API in their recent projects is 85 €, which corresponds to a daily rate of about 678 € 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 80% hold at least a Master's degree.

On average, freelancers in Bremen, Germany who have used REST API in their recent projects have 16 years of professional experience, with a single engagement typically lasting around 2.7 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 (33%).

The most common industries among freelancers in Bremen, Germany who have used REST API in their recent projects are Information Technology (100%), Manufacturing (50%), and Retail (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 (50%).

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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