JWT Experts in Berlin
, matched quickly with vetted and available freelancersHire experts who design token-based authentication, integrate OAuth 2.0 and OpenID Connect, and secure APIs across web and mobile systems. FRATCH uses fast, precise AI matching to connect you with vetted, available freelancers for your JWT project.
Meet FRATCH Experts in Berlin, who have recently used JWT
Aruldass A.
Last position:
Web Module Lead at Mphasis Limited
- Led the end-to-end delivery of enterprise full-stack web applications by driving requirement analysis, solution design, frontend and backend development, database design, API integration, code reviews, team coordination, Agile execution, CI/CD deployments, production support, performance optimization, security implementation, and stakeholder collaboration to deliver scalable, high-quality software solutions.
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
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.
Abhiroop B.
Last position:
Software Engineer III at Foundry Digital
- Developed and deployed microservices in Kotlin and Spring Boot, integrated AWS Secrets Manager to secure credentials and decreased network calls using Spring cache.
- Refactored Kafka consumer using Spring Kafka with semaphore-based backpressure to cap records and keep heap memory stable under spikes; switched to batch upserts to cut down on database invocations; added Testcontainers integration tests for Kafka and database to pave the way for future changes.
- Automated the financial reconciliation workflow in Spring Boot (Kotlin) using Spring Scheduler, transactional boundaries, JPA/Hibernate on MySQL, and Flyway migrations, saving the accounts team 16+ hours per week.
- Designed and dockerized payments end-to-end test framework in Robot (Python) with reusable keyword libraries and profiles; integrated with GitLab CI (JaCoCo XML and HTML reports) to accelerate releases and lift code coverage to 80%.
- Implemented end-to-end observability on Datadog by instrumenting services with Datadog APM, correlating metrics and logs, provisioning dashboards, and creating monitors with burn-rate alerts and anomalies to harden reliability and give stakeholders clear visibility.
Ibrahim H.
Last position:
Senior Full Stack / AI Engineer at Punktum Digital GmbH
- Context: Healthcare and laboratory teams required faster document analysis, treatment-planning support, and reliable AI workflows for MR/VR-assisted operations.
- Contribution: Built the AI healthcare platform, model/agent workflows, VR-glasses deployment platform, REST APIs, Next.js/React interfaces, and CI/CD pipelines.
- Impact: Delivered a production-ready AI product foundation that improved clinical document review, supported laboratory automation, and made VR fleet deployment manageable across environments.
Tech: TypeScript, Next.js, Node.js, React, Java, Spring Boot, Python, PyTorch, TensorFlow, Docker, PostgreSQL, OpenAPI, GitLab, GitHub Actions.
Mario J.
Last position:
Architect / Developer at handyhase
- Overhaul of the entire design and implementation of new UI/UX aspects using React
- Planning of the software architecture and structuring of the project for long-term scalability using Git for version control
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.
Julien L.
Last position:
MLOps Engineer at SAMGEN
- Building and scaling cloud infrastructure on GCP to support a SaaS platform for industrial clients
- Designing and implementing a data-driven DevOps pipeline for streamlined deployment and CI/CD workflows
- Collaborating with Data Science team on MLOps workflow to automate integrated retraining
Daniel S.
Last position:
Frontend and Web Developer at Datalyze Solutions
- Frontend development and implementation of various designs (landing pages, overview pages)
- Responsible for the content and updates of the Datalyze Solutions company website
- Joint planning and development of an admin application for listing and locating real estate projects (CBRE)
- Joint planning and development of extensive solutions for automatic staff allocation in plants (Bosch)
- Backend development of various small projects with different stacks
- Tech stack: GitLab CI/CD, Elixir, Phoenix Framework, Ecto, PostgreSQL, Docker, Hetzner, Traefik, NGINX, Python, Flask, Next.js/React, Leaflet, GeoServer, TypeScript, MongoDB
Max D.
Last position:
Tech Lead, Interim CTO/CPO at MatchDispatch
I worked on automating cold outreach.
- Developed a queue architecture to support the parallel execution of large volumes of background tasks.
- Integrated multiple email delivery providers.
- Implemented an LLM-based data enrichment process.
Technologies: TypeScript, React, Node.js, Next.js, Drizzle ORM, PostgreSQL, Next-Auth, JWT, Docker, Kubernetes, AWS, CloudFlare, Traefik, Groq, Jest, Figma
Christopher M.
Last position:
Mobile & Full-Stack Engineer at Propstack GmbH
- Refactored the mobile app by reimplementing stores, models, API client, screens and components using Typescript
- Added performant on-device storage for stores as preparation for offline mode
- Integrated RNUILib to achieve a minimal and modern UI design quickly
- Implemented native packages to provide additional features such as displaying of caller IDs
- Planned feature development and UX improvements following initial refactoring and redesign
Ines R.
Last position:
Entrepreneur at ZuManAsha
- Built and operated a successful handmade tray business sold via Etsy and Spock, fulfilling 120+ orders and maintaining 5-star customer reviews.
- Managed 100% of the operations including product design, international shipping, and marketing across Instagram, TikTok, and Etsy, growing a global customer base.
Kalpesh P.
Last position:
Intern Java Developer at Unzer GmbH
- Developed a Proof of Concept for distributed tracing using OpenTelemetry within a microservices architecture, enhancing system observability and reducing mean-time-to-resolution for issues.
- Built and maintained backend services using Java and Spring Boot, ensuring high reliability and performance for payment transaction workflows.
- Implemented comprehensive automated testing with JUnit and Mockito, achieving 95% test coverage to ensure code quality and maintainability.
- Gained insight into payment transaction workflows, validating end-to-end system reliability and gaining domain knowledge in financial processes.
- Tech used: Java, Spring Boot, Microservices, REST API, Kafka, Grafana, Datadog, Docker, MongoDB
Smit K.
Last position:
Software Engineer (Backend & API Lead) at Surpeats
- Backend & API architecture: Independently architected a scalable Node.js backend and RESTful API to handle a high volume of transactions, ensuring robust data management for users, restaurants, and administrators.
- Microservices & infrastructure: Engineered a sophisticated database architecture using PostgreSQL with geographic query optimization. Designed and deployed a robust infrastructure with three separate microservice servers and a database server.
- Performance & scalability: Implemented Redis caching and performed SQL query optimization to improve application performance and reduce load on the database, enhancing responsiveness for real-time services.
- Security & authentication: Integrated secure payment processing via Razorpay and implemented robust middleware for JWT authentication to ensure secure transactions and data integrity.
- CI/CD & deployment: Established a robust CI/CD pipeline using Docker and GitHub Actions for automated and reliable deployment, showcasing fluency in modern DevOps practices.
Sanju B.
Last position:
Portfolio for Content Management System (Flask, SQLAlchemy, Bootstrap)
- Created a CMS-driven portfolio app for showcasing projects with user authentication, CRUD operations, and Guest Mode.
- Designed and implemented full-stack architecture using Flask, SQLAlchemy, and Bootstrap 5.
- Integrated secure authentication and CSRF protection mechanisms.
- Deployed production-ready web app using Docker and Railway.
- Achieved full project cycle completion: design, development, testing, deployment, and documentation.
- Demonstrated Agile development principles and industry-standard software engineering practices.
Discover over 15,000 top freelancers
Statistics of experts using JWT
Aggregated from the professional profiles of matched freelancers.
Experience
12 years (Germany: 17 years)
Position duration
1.7 years (Germany: 2.7 years)
Positions per freelancer
8 (Germany: 13)
Top business areas
Product Development, Information Technology, Quality Assurance
Top industries
Information Technology, Banking and Finance, Manufacturing
Certification focus areas
Information Technology, Product Development, Legal
Bachelor's degree or higher
94% (Germany: 86%)
Master's degree or higher
38% (Germany: 53%)
Certifications per freelancer
1 (Germany: 3)
Most common languages
German, English, Hindi
Speak two or more languages
100% (Germany: 98%)
Based on our profile pool as of 19 Sep 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Berlin 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 Berlin using JWT
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 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
JWT 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 (94%)
- Banking and Finance (59%)
- Manufacturing (35%)
- Professional Services (35%)
- Media and Entertainment (29%)
- Retail (29%)
- Automotive (24%)
- Healthcare (24%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What JWT is
JWT, or JSON Web Token, is a compact format for securely transmitting claims between parties as a signed JSON object. It is commonly used for stateless authentication, API access and identity exchange. A token can carry verified information about a user, service or permission scope without requiring the receiving system to query a session store for every request.
Where it is used
JWT fits systems where browsers, mobile applications and services need to establish identity across clear API boundaries.
- User login and access tokens for web and mobile applications
- Service-to-service authentication in distributed systems
- API gateways that validate claims before forwarding requests
- Single-page applications with separate frontend and backend layers
- Short-lived tokens combined with refresh-token flows
Ecosystem and tooling
Strong JWT work connects token handling with OAuth 2.0, OpenID Connect and an identity provider. Professionals select suitable signing algorithms, manage public and private keys, validate issuer, audience and expiry claims, and integrate middleware for frameworks such as Spring Security, Express, NestJS, Django or .NET. Libraries must be kept current and configured rather than trusted by default.
When expertise helps
Companies often bring in freelance specialists when authentication spans several products, services or teams. Berlin companies building SaaS products, fintech systems, marketplaces and connected services may need help replacing fragile session logic or aligning separate APIs around one identity model.
- Review an existing token design and identify security gaps
- Introduce OAuth 2.0 or OpenID Connect without breaking clients
- Define claims, scopes, rotation and revocation procedures
- Connect an identity provider to backend and frontend systems
What strong professionals deliver
A capable specialist treats JWT as part of a complete security design, not as a drop-in login feature. They distinguish authentication from authorization, avoid putting sensitive data in readable claims, enforce signature and algorithm checks, and define clear expiry and refresh behavior. They also document failure responses and test invalid, expired, replayed and tampered tokens.
Collaboration and delivery
JWT projects benefit from close work with application, security and infrastructure teams. Remote collaboration works well when API contracts, threat assumptions and key ownership are documented; on-site work in Berlin can help when authentication must be coordinated across regulated or highly interconnected systems. A reliable engagement ends with tested integration, operational guidance and a practical migration path.
Frequently asked questions
What clients ask us most about JWT — answered in short.
JWT is used to carry signed claims between a client and a server, commonly for authentication and API authorization. It can support stateless request validation, service-to-service access and identity flows across web, mobile and distributed systems.
JSON Web Token authentication keeps relevant claims in the token, while server-side sessions keep state on the server and send a session identifier to the client. JWT can simplify horizontal scaling and cross-service access, but sessions often offer more direct control over revocation and immediate logout.
JWT is a token format, not an authorization protocol or identity standard. OAuth 2.0 defines delegated access flows, while OpenID Connect adds identity information; both can use JWTs for particular tokens and messages.
A strong JWT specialist should understand OAuth 2.0, OpenID Connect, API gateways, key management and secure cookie or storage choices. Experience with the application framework, identity providers, testing and deployment operations is also important because token security depends on the surrounding system.
A small integration may need a specialist who can configure a proven identity provider and validate the application flow. A larger migration or multi-service design calls for deeper JWT expertise, including threat modeling, key rotation, revocation strategy, backward compatibility and incident handling.
JWT work is well suited to remote collaboration when API contracts, environments and ownership of signing keys are clearly documented. Berlin teams may choose on-site workshops for sensitive architecture decisions, while day-to-day implementation can usually happen remotely in English or German, depending on the project.
Ask the specialist to explain signature validation, issuer and audience checks, token expiry, refresh handling and key rotation in the context of your system. A quality JWT professional can also describe how they prevent algorithm confusion, excessive claims, unsafe storage and weak logout behavior.
Common JSON Web Token mistakes include trusting decoded claims before verifying the signature, accepting unintended algorithms, storing tokens in unsafe browser locations and using long-lived access tokens. Teams also overlook revocation, key rotation, refresh-token protection and consistent authorization checks across services.
The average hourly rate of freelancers in Berlin, Germany who have used JWT in their recent projects is 67 €, which corresponds to a daily rate of about 537 € based on an 8-hour working day.
Of the freelancers in Berlin, Germany who have used JWT in their recent projects, 94% hold at least a Bachelor's degree and 38% hold at least a Master's degree.
On average, freelancers in Berlin, Germany who have used JWT in their recent projects have 12 years of professional experience, with a single engagement typically lasting around 1.7 years.
The most common languages among freelancers in Berlin, Germany who have used JWT in their recent projects are German (100%), English (100%), and Hindi (18%).
The most common industries among freelancers in Berlin, Germany who have used JWT in their recent projects are Information Technology (94%), Banking and Finance (59%), and Manufacturing (35%).
The most common business areas among freelancers in Berlin, Germany who have used JWT in their recent projects are Product Development (100%), Information Technology (94%), and Quality Assurance (65%).
Main locations of FRATCH Experts, who have recently used JWT
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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Philipp Thomaschewski
FRATCH CEO
