Spring Security Experts in Berlin
for secure applications, matched in minutes with vetted freelancersHire experts who secure Spring applications with OAuth 2.0, OpenID Connect, JWT and method-level authorization, from login flows to enterprise access controls. FRATCH matches you quickly and precisely with vetted, available freelancers who fit your technical needs.
Meet FRATCH Experts in Berlin, who have recently used Spring Security
Imran A.
Last position:
Software Engineer II at LivePerson Germany GmbH
- Led development of 15+ microservices (Java 17, Spring Boot) driving customer interactions; migrated from on-prem to GCP Kubernetes, improving scalability and reducing infra cost by 20%.
- Optimized user services with CouchDB caching and API refactoring, cutting response times by 35% and enhancing customer experience.
- Implemented canary deployments, FluxCD GitOps, and CI/CD optimizations in GitLab, reducing release lead time by 25% and enabling zero-downtime rollouts.
- Set up Grafana health checks and Anodot alerts for latency, error, and throughput monitoring, reducing MTTR by 40%.
- Built secure APIs using OAuth2, DPoP, and Gatekeeper, integrated REST and GraphQL, and achieved 90%+ test coverage with unit and E2E tests.
- Mentored junior developers, promoted Agile best practices, and collaborated cross-functionally to deliver high-impact, reliable customer-facing features.
Murad H.
Last position:
Founder & Technical Lead at Hubpoint.Ai
- Founded an AI-powered scheduling and business-management SaaS for SMBs, owning technology strategy, architecture, product development, UX, billing and go-to-market execution.
- Architected and shipped a multi-tenant platform with REST APIs, RBAC, CRM, billing and notifications, powering the manager dashboard, admin console, booking experience and iOS/Android applications.
- Led and mentored 7 software engineers, 1 DevOps engineer, 1 QA engineer and 1 UX/UI designer, while remaining hands-on across backend, frontend and product delivery.
- Built AI voice and chat agents using Python/FastAPI, OpenAI and Anthropic APIs, RAG, pgvector and tool calling; integrated Twilio, Google Calendar/Meet, Stripe and Firebase.
- Owned production infrastructure and automated delivery across separate environments using Docker, Nginx, GitHub Actions and Grafana; represented the company at accelerators and international startup events.
Selected stack: Python, FastAPI, Node.js, Vue 3, React/Next.js, React Native, PostgreSQL, Redis, Docker
Karthikeyan R.
Last position:
Full-Stack Developer — Own Product at Self-employed
Java 21 · Spring Boot 3 · Keycloak · PostgreSQL · Docker · Nginx · GitHub Actions · DigitalOcean · React 18 · TypeScript · Plasmo
- Architected and shipped a production-ready Job Application Tracker end-to-end: REST API with 5-stage workflow, pagination, sorting, and dynamic filtering — full ownership from design to live cloud deployment on DigitalOcean.
- Implemented production-grade identity management: OAuth 2.0 / OpenID Connect / JWT / RBAC via Keycloak, applying Hexagonal Architecture and DDD principles.
- Built automated CI/CD pipeline (GitHub Actions); containerised with Docker; Nginx reverse proxy with path-based routing and SSL termination.
- Developed a Chrome Extension (Plasmo framework, Manifest V3) that auto-fills job applications directly from LinkedIn into the tracker — demonstrates full product thinking across backend API and browser client.
Khaled M.
Last position:
Senior/Staff Backend Engineer at Heycar (Mobility Trader GmbH)
- Heycar is a leading automotive platform redefining the used car market through intelligent data pipelines, multi-tenant services, and dealer-focused tooling. I led initiatives across backend architecture, data ingestion, and identity management to enhance scalability, reliability, and developer productivity.
- Ingestion Platform: Designed a unified ingestion platform with YAML-based configuration, enabling new dealer data pipelines to be onboarded without code changes, cutting setup time from ~2 months to 2-3 days and improving scalability by 40%.
- Keycloak Leadership: Acted as the company's Keycloak expert, scaling it for multi-tenant identity management and extending functionality with custom plugins and delegated admin APIs.
- Back-Office Tooling: Developed a back-office application integrated with Salesforce, enabling dealers to manage inventory, convert leads, and handle support requests in real time.
- Multi-Tenant Migration: Collaborated across backend teams to migrate Heycar's core services into a unified multi-tenant cluster, ensuring high availability.
- Frontend CI Optimization: Optimized monorepo delivery by implementing CircleCI dynamic config with NX, deploying only affected UI projects and drastically cutting build times.
- Observability & Mentorship: Enhanced monitoring and release reliability while mentoring backend engineers and improving code review standards.
Botirjon R.
Last position:
Security Operations Specialist at Expert Systems AG
- Programming with TypeScript, JavaScript, PHP and other technologies
- Monitoring, programming, and fixing crawlers for the ProvenExpert and ProvenEmployer websites to collect all reviews and ratings for clients
- Testing all programs required for the correct functioning of the ProvenExpert and ProvenEmployer websites
- Designing and implementing data storage in databases using MongoDB and creating backups as needed
- Maintaining all computers (installing necessary software, connecting to all databases, registering and repairing) and other equipment
Fares M.
Last position:
Software Engineer at DXC Technology
- Developed and maintained backend services for Q8's Digital Cards and Mobility Platform in Java and Spring Boot.
- Designed scalable, multi-tenant microservices with API-first principles using Swagger.
- Implemented asynchronous messaging with Apache ActiveMQ to decouple services and improve resilience.
- Managed multi-tenant architecture with data isolation and configurable tenant logic.
- Ensured secure data handling with Spring Security and PostgreSQL, supported by Liquibase version control.
- Integrated JasperReports for generating PDF reports based on user and business needs.
- Followed Agile practices and implemented thorough unit and integration testing.
Igor K.
Last position:
Freelance Software Developer
Discover over 15,000 top freelancers
Statistics of experts using Spring Security
Aggregated from the professional profiles of matched freelancers.
Experience
15 years (Germany: 16 years)
Position duration
3.6 years (Germany: 1.9 years)
Positions per freelancer
5 (Germany: 11)
Top business areas
Information Technology, Product Development, Operations
Top industries
Information Technology, Banking and Finance, Transportation
Bachelor's degree or higher
100% (Germany: 92%)
Master's degree or higher
33% (Germany: 55%)
Doctorate
17% (Germany: 14%)
Certifications per freelancer
1 (Germany: 2)
Most common languages
German, English, Arabic
Speak two or more languages
86% (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 Berlin 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 Berlin using Spring Security
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.
Spring Security 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%)
- Banking and Finance (43%)
- Transportation (29%)
- Professional Services (29%)
- Government and Administration (29%)
- Telecommunication (29%)
- Automotive (14%)
- Biotechnology (14%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What Spring Security does
Spring Security is the security framework for Spring-based applications. It handles authentication, authorization, session protection and defenses against common web threats. Teams use it to secure REST APIs, server-rendered applications, microservices and internal business systems without rebuilding core security controls.
Core capabilities
The framework supports several identity and access patterns across modern Java systems:
- Form login, HTTP Basic and passwordless authentication
- OAuth 2.0 and OpenID Connect login flows
- JWT validation for stateless APIs
- Role, scope and permission-based authorization
- Method security with annotations and policy checks
Ecosystem and tooling
Strong specialists work comfortably with Spring Boot, Spring MVC, Spring WebFlux and Spring Cloud Gateway. They connect Spring Security to identity providers such as Keycloak, Okta, Auth0 or Microsoft Entra ID, and understand JPA, database-backed users, Redis sessions and test tooling. Knowledge of TLS, HTTP, cookies, CORS and CSRF is essential for sound decisions.
When companies need specialists
Freelance expertise helps when an application is moving from basic login to federated identity, when an API needs reliable token validation or when several services must share consistent access rules. Specialists also support security reviews, migrations from older configuration styles, incident remediation and the delivery of clear authentication documentation. In Berlin, remote collaboration is common, while on-site work can help teams align quickly on sensitive systems and language expectations.
Typical deliverables
A Spring Security professional may produce configuration, reusable authorization components and integration tests alongside implementation work:
- OAuth 2.0 resource servers and OpenID Connect clients
- Secure API gateways and service-to-service authentication
- Custom UserDetailsService and identity-provider integrations
- Role and permission models mapped to business rules
- Security test suites, threat reviews and migration plans
What strong professionals show
Quality work goes beyond making a login form function. Strong professionals explain trust boundaries, choose session or token-based designs deliberately and keep authorization close to the business rules. They test denied access as carefully as successful access, handle error responses without leaking information and document key rotation, logout, token expiry and operational ownership. They also keep Spring Security configuration explicit, maintainable and aligned with the wider Spring application.
Frequently asked questions
Not sure where to start with Spring Security? These answers cover the essentials.
Spring Security protects Spring applications by controlling who can authenticate and what each user or service may access. It is commonly used for browser logins, REST APIs, OAuth 2.0 clients, OpenID Connect integrations, JWT resource servers and method-level authorization.
Spring Security is usually the natural choice for Spring applications because it integrates deeply with Spring Boot, Spring MVC and Spring WebFlux. Apache Shiro can be simpler for some standalone use cases, while custom security code gives more control but creates greater maintenance and review risk.
A strong Spring Security specialist should understand Spring Boot, Java, HTTP, TLS, cookies, CORS and CSRF. Experience with OAuth 2.0, OpenID Connect, JWT, Keycloak or cloud identity providers is also valuable, as are API gateway patterns, automated security testing and threat modeling.
The right Spring Security experience depends on the risk and integration scope. A straightforward login configuration may need focused framework knowledge, while a multi-service identity design calls for someone who has handled token lifecycles, authorization models, migrations and production troubleshooting.
Yes. Spring Security work is well suited to remote collaboration when requirements, identity flows and access decisions are documented clearly. Berlin teams may choose remote or on-site work depending on data sensitivity, while German or English communication can be agreed before the engagement.
Ask a Spring Security freelancer to explain a comparable authentication and authorization design, including its trust boundaries and failure cases. Review how they test denied access, protect tokens and sessions, handle secrets and document operational tasks such as key rotation and logout.
Spring Security supports browser applications with sessions, login pages and CSRF protection, as well as stateless APIs using bearer tokens. A specialist should select the model based on the client type and threat model rather than applying one configuration everywhere.
A good Spring Security implementation keeps authentication, authorization and business permissions distinct. Freelancers should use explicit configuration, small reusable components, focused integration tests and clear documentation for roles, scopes, token expiry, error handling and identity-provider changes.
The average hourly rate of freelancers in Berlin, Germany who have used Spring Security in their recent projects is 95 €, which corresponds to a daily rate of about 762 € based on an 8-hour working day.
Of the freelancers in Berlin, Germany who have used Spring Security in their recent projects, 100% hold at least a Bachelor's degree, 33% hold at least a Master's degree, and 17% hold a doctorate.
On average, freelancers in Berlin, Germany who have used Spring Security in their recent projects have 15 years of professional experience, with a single engagement typically lasting around 3.6 years.
The most common languages among freelancers in Berlin, Germany who have used Spring Security in their recent projects are German (86%), English (86%), and Arabic (29%).
The most common industries among freelancers in Berlin, Germany who have used Spring Security in their recent projects are Information Technology (100%), Banking and Finance (43%), and Transportation (29%).
The most common business areas among freelancers in Berlin, Germany who have used Spring Security in their recent projects are Information Technology (100%), Product Development (86%), and Operations (43%).
Main locations of FRATCH Experts, who have recently used Spring Security
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 
Munich Request a free demo
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FRATCH CEO
