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Spring Boot Experts in Dortmund

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Hire experts who build Spring Boot APIs, connect Spring Data and security, and deliver production-ready services for Java backends and cloud deployments. Get fast, precise matching with vetted, available freelancers.

Meet FRATCH Experts in Dortmund, who have recently used Spring Boot

Verified expert

Arkadius Sikora

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Architect; Senior Developer; Full Stack Developer; DevOps Lead

Dortmund
Arkadius Sikora

Last position:

Architect; Senior Developer; Full Stack Developer; DevOps Lead at Bitmarck Holding GmbH

  • Requirement engineering for Ombudsstelle and creation of technical user stories for EPA V3
  • Handling of objections and revocations via mail and letter with high transaction mail volume
  • Coordination with other teams on interfaces
  • Design of a highly available, high-throughput solution on OpenShift with Java backend microservices
  • Implementation and extension of microservices
  • Infrastructure setup for deployment on OpenShift/Kubernetes including Jenkins pipelines
  • Integration with BitIAM, TI-M Fachdienst, Consent Keeper and FDV
  • Capture of requirements from DevOps operations and business units
  • Continuous integration and Scrum practices
  • Use cases: Kassenfusion, Opt-Out, Last Test, Widerspruchsmanagement
  • Integration test automation and feature extensions including Spring Boot 3 updates
Verified expert

Hamza Sohail

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Software Developer

Bochum
Hamza Sohail

Last position:

Software Developer at WaslSign

  • Designed and implemented the system architecture for scalable document workflows, improving stability and performance.
  • Optimized the login flow with TOTP-based MFA, reducing complexity and login time by 35%.
  • Built secure backend APIs for document upload, signing, and management.
  • Developed encrypted file handling with AWS S3 pre-signed URLs, ensuring GDPR-compliant data protection.
  • Implemented JWT-based role authentication, strengthening access control and overall platform security and reducing code and database complexity.
  • Optimized database queries and caching using ORM, reducing API response time by 40%.
  • Integrated real-time webhook updates, enhancing workflow transparency and user experience.
Verified expert

Yasin Yildiz

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DevOps Architect & Backend Developer

Dortmund
Yasin Yildiz

Last position:

DevOps Architect & Backend Developer at Schweizerische National Bank

  • Architecting and enhancing the DevOps infrastructure in a regulated environment
  • Migration, planning, and development from a monolith to microservices (ASP.NET Core)
  • Building and maintaining CI/CD pipelines (GitLab, Jenkins) to support agile development
  • Managing artifact repositories with JFrog Artifactory and security scans via Xray
  • Migrating and integrating source code repositories (SVN → GitLab)
  • Operating and configuring a container platform with OpenShift
  • Automating deployments with Ansible, Helm, and the Ansible Automation Platform
  • Implementing monitoring and alerting solutions with Prometheus
  • Collaborating closely with the frontend development team to optimize build, test, and release processes
  • Supporting the establishment of secure and scalable infrastructure processes (Secure SDLC)
  • Documenting and sharing knowledge within the team
  • Leading refinements and designing the backend architecture
Verified expert

Jan-Niklas Freundt

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Founder

Bochum
Jan-Niklas Freundt

Last position:

Founder at Freundt Consulting GmbH

  • Porsche AG (2018 – 12/2019): Design and development of native iOS apps in motorsport/Formula E (e.g. travel app and enterprise warehouse management with SAP integration) and e-mobility (Porsche Taycan; development of a native Microsoft Excel data export).
  • StarFinanz / Sparkasse (05/2019 – 07/2021): Worked on the banking app (FinTS, HBCI, PSD2, Apple Pay); implemented Apple Pay; implemented a new TAN method; worked with the FinTS backend (PSD2); opened bank accounts via app (eID, VideoID, Authada); designed a new, modern banking experience.
  • eBay Classifieds and Adevinta (07/2021 – 06/2023): Packaging & Pricing (premium features for business customers): e.g. markdown; company page; advertising options; multi-tenant design system based on SwiftUI and UIKit.
  • Maschinensucher (07/2023 – 12/2023): Fullstack mobile (Android, iOS) and backend (PHP, Yii, Elastic Search) development; implemented search agent push notifications, InstantSearch, and modernized the design.
  • Bankverlag (02/2024 - Present): Consulting and fullstack development of white-label apps (iOS / Android / Java Spring Boot) for private banks.

Discover over 15,000 top freelancers

Statistics of experts using Spring Boot

Aggregated from the professional profiles of matched freelancers.

Experience

14 years (Germany: 17 years)

Position duration

1.3 years (Germany: 1.9 years)

Positions per freelancer

14 (Germany: 12)

Top business areas

Information Technology, Product Development, Operations

Top industries

Information Technology, Banking and Finance, Education

Bachelor's degree or higher

80% (Germany: 95%)

Master's degree or higher

60% (Germany: 55%)

Certifications per freelancer

0 (Germany: 2)

Most common languages

German, English, Latin

Speak two or more languages

100% (Germany: 96%)

Based on our profile pool as of 30 Aug 2026.

Daily rate distribution

0 2 4 6 8
<€480 €640-​720 €720+

The chart shows how the daily rates of freelancers in this technology in Dortmund 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 Dortmund using Spring Boot

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

1000
750
500
250
Rate comparison chart
Daily rate avg. 761 €
Germany avg. 740 €

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

1000
750
500
250
Rate comparison chart
Median rate 800 €
Germany median 752 €

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

Spring Boot basics

Spring Boot is the fast path to production-ready Java services. It removes much of the setup around the Spring ecosystem and helps specialists build REST APIs, internal tools, microservices, and backend systems with less wiring.

What it is used for

  • REST and JSON APIs for web and mobile products
  • Microservices and service-based architectures
  • Batch jobs, integrations, and scheduled processing
  • Cloud-ready backend services with clear configuration

It is common in systems that need strong structure, familiar Java tooling, and predictable runtime behavior.

Ecosystem and tooling

A strong Spring Boot specialist works comfortably with Spring MVC, Spring Security, Spring Data, Actuator, and testing tools like JUnit and Mockito. They also know how to package services, manage configuration, and connect the app to databases, message brokers, and external APIs.

When companies bring in experts

Companies usually look for freelance Spring Boot expertise when a backend needs to move faster, become more stable, or be prepared for growth. This is also useful when an older Spring application needs cleanup, a monolith must be split into services, or a new integration has to fit into an existing Java landscape.

What strong specialists deliver

A good specialist writes clean service layers, keeps APIs consistent, and handles security, validation, and error handling well. They also care about tests, observability, and deployment details so the service is maintainable after delivery.

Dortmund collaboration

In Dortmund, Spring Boot work often fits teams that want clear communication and reliable delivery across local offices or remote setups. Many experts can work in English, and some can join on site when a project needs close coordination with product, operations, or legacy Java teams.

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Frequently asked questions

Everything clients usually want to know about Spring Boot, in one place.

Spring Boot is used to build Java backend services that need to move into production with less setup. It is a common fit for REST APIs, microservices, internal business apps, integrations, and batch processing. Teams choose it when they want the Spring ecosystem without spending time on repetitive configuration.

Spring Boot adds opinionated defaults, auto-configuration, and starter dependencies on top of Spring. That means less manual setup and faster delivery for new services. Plain Spring can still make sense when a team needs full control, but Boot is usually easier to ship and maintain.

A company should bring in Spring Boot expertise when a backend has to be built, stabilized, or modernized quickly. It is also a good choice for security hardening, performance work, service decomposition, and integration projects. Freelance specialists are useful when the team needs focused delivery without a long hiring cycle.

A strong Spring Boot specialist often brings Java, Spring MVC, Spring Data, Spring Security, SQL, and testing skills. Depending on the project, they may also need Docker, Kubernetes, messaging systems, or cloud services. Good API design and debugging are just as important as framework knowledge.

Not always. Many Spring Boot projects can run remotely if the requirements, access, and review process are clear. On-site work in Dortmund helps when a team is modernizing a legacy Java system or needs close collaboration with local stakeholders and release owners.

That depends on the scope of the work. A small service or focused bug-fix task may only need a solid Spring Boot freelancer, while a larger platform change needs someone who understands architecture, testing strategy, and deployment. For security, data access, or production issues, proven delivery matters more than framework familiarity alone.

A strong Spring Boot specialist keeps code simple, tests important paths, and avoids unnecessary framework tricks. They know how to structure services, handle validation and errors, and expose clean APIs. They also think about logs, metrics, deployment, and maintenance from the start.

Yes, Spring Boot remains a strong choice for new Java backend systems, especially when teams want a mature ecosystem and straightforward operations. It fits well for service APIs, enterprise workflows, and cloud deployment. It is most effective when the project values reliability, clear structure, and long-term maintainability.

The average hourly rate of freelancers in Dortmund, Germany who have used Spring Boot in their recent projects is 95 €, which corresponds to a daily rate of about 761 € based on an 8-hour working day.

Of the freelancers in Dortmund, Germany who have used Spring Boot in their recent projects, 80% hold at least a Bachelor's degree and 60% hold at least a Master's degree.

On average, freelancers in Dortmund, Germany who have used Spring Boot in their recent projects have 14 years of professional experience, with a single engagement typically lasting around 1.3 years.

The most common languages among freelancers in Dortmund, Germany who have used Spring Boot in their recent projects are German (100%), English (100%), and Latin (17%).

The most common industries among freelancers in Dortmund, Germany who have used Spring Boot in their recent projects are Information Technology (100%), Banking and Finance (83%), and Education (50%).

The most common business areas among freelancers in Dortmund, Germany who have used Spring Boot in their recent projects are Information Technology (100%), Product Development (100%), and Operations (67%).

Main locations of FRATCH Experts, who have recently used Spring Boot

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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