JWT Experts in Berlin
matched in minutes by AIHire experts who design token-based authentication, integrate OAuth 2.0 and OpenID Connect, and secure APIs across web and mobile systems. FRATCH matches you quickly and precisely with vetted, available freelancers who fit your project.
Meet FRATCH Experts in Berlin, who have recently used JWT
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.
Mukund B.
Last position:
Voice AI Chatbot - Real-Time Audio Assistant
- ▶ Built real-time voice assistant (STT → LLM → TTS pipeline) benchmarking and evaluating multiple STT providers including faster-whisper and Azure Speech. achieved sub-3s latency, Groq API (Llama 3) with multi-turn memory - directly handling edge cases in dictation, names and passcode recognition.
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.
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.
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
Yavuz Ö.
Last position:
Full-Stack Developer – Practical Project Work at Sybarium Limited
Company in the industrial sector
Projects completed during retraining
- Rebuilt the company website from WordPress using a modern stack with Astro and TypeScript, deployed on Vercel (live at sybarium.vercel.app); replaced the legacy CMS with a faster, maintainable system.
- Reduced page load time by ~80% (from 5 s to under 1 s) through optimization, caching, and asset optimization.
- Developed n8n automation workflows that integrate several REST APIs and internal systems, saving more than 3 hours of manual work per week.
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.
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.
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.
Discover over 15,000 top freelancers
Statistics of experts using JWT
Aggregated from the professional profiles of matched freelancers.
Experience
13 years (Germany: 17 years)
Position duration
1.9 years (Germany: 2.7 years)
Positions per freelancer
8 (Germany: 12)
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
89% (Germany: 86%)
Master's degree or higher
39% (Germany: 52%)
Certifications per freelancer
2 (Germany: 3)
Most common languages
German, English, Hindi
Speak two or more languages
100% (Germany: 98%)
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 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 29 Oct 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 (89%)
- Banking and Finance (53%)
- Manufacturing (37%)
- Professional Services (32%)
- Retail (32%)
- Media and Entertainment (26%)
- Automotive (21%)
- Healthcare (21%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Token-based authentication
JSON Web Token, usually called JWT, is a compact format for transmitting signed claims between systems. Applications use it to authenticate users and services without storing a session on every request. A token can carry identity, permissions and validity data, while a signature helps the receiving system verify that its contents were not changed.
Where JWT fits
JWT is common in REST APIs, single-page applications, mobile backends and service-to-service communication. It can support stateless authentication across distributed systems, but it does not replace access control, secure storage or careful token lifecycle design.
- Protect API routes with bearer tokens
- Connect web and mobile clients to backend services
- Pass identity claims between trusted services
- Support role and scope-based authorization
Ecosystem and tooling
Strong JWT work often connects the token format with OAuth 2.0 and OpenID Connect. Specialists may use identity providers such as Keycloak, Auth0 or Microsoft Entra ID, together with libraries for Java, Spring Security, Node.js, .NET, Python or Go. They also configure signing algorithms, key rotation, discovery documents and claims mapping.
When expertise matters
Companies bring in freelance JWT specialists when authentication is being added to an existing API, migrated from server sessions or shared across several services. Expertise is also useful when a token setup has unclear expiry rules, excessive claims, weak key handling or inconsistent authorization between environments.
- Review an existing token and permission design
- Integrate an identity provider with APIs
- Migrate authentication without breaking clients
- Test expiry, revocation and invalid-token paths
What good implementation requires
A sound design separates authentication from authorization and grants only the claims each service needs. It uses short-lived access tokens, secure refresh-token handling, protected signing keys and strict issuer, audience and algorithm checks. Professionals also consider replay, token theft, clock differences and logout behavior.
Choosing the right specialist
Look for practical experience with the application’s backend, client types and identity provider, not only familiarity with the JWT specification. Ask how the specialist handles key rotation, refresh tokens, compromised credentials, authorization rules and observability. For Berlin teams, remote collaboration can work well when API contracts, security decisions and documentation are clear; on-site work may help during sensitive migrations or workshops.
Frequently asked questions
What clients ask us most about JWT — answered in short.
JWT is used to carry signed claims between an issuer and a receiving application. It commonly supports API authentication, service-to-service identity and authorization decisions for web or mobile clients.
JSON Web Token authentication can let distributed services validate requests without looking up a session on every call. Server-side sessions offer simpler revocation and central control, so the right choice depends on the system’s scale, security model and operational needs.
JWT is a token format, while OAuth 2.0 defines delegated authorization and OpenID Connect adds an identity layer. OAuth and OpenID Connect may use JWTs, but a token format alone does not provide a complete login or permission system.
JWT work benefits from knowledge of HTTP APIs, OAuth 2.0, OpenID Connect, identity providers and secure key management. The specialist should also understand the project’s backend framework, client applications, authorization model and logging practices.
JWT expertise should match the risk and integration complexity of the work. A straightforward API may need focused implementation support, while a migration across services or identity providers calls for someone who can design the security model, test failure paths and guide the wider team.
JWT projects are often suitable for remote collaboration when requirements, API documentation and security ownership are explicit. Berlin companies should agree on working language, review routines and access controls early; on-site sessions can be useful for architecture reviews or high-risk migrations.
JWT implementations often fail through long-lived access tokens, unsafe browser storage, weak signing-key protection or missing issuer and audience checks. Other risks include accepting unintended algorithms, placing sensitive data in claims and treating token signing as a substitute for authorization.
JSON Web Token quality is visible in clear trust boundaries, narrowly scoped claims and documented key rotation and revocation choices. Ask the specialist to explain invalid-token handling, refresh-token protection, compromised-key response and tests for expiry, replay and permission errors.
The average hourly rate of freelancers in Berlin, Germany who have used JWT in their recent projects is 77 €, which corresponds to a daily rate of about 618 € based on an 8-hour working day.
Of the freelancers in Berlin, Germany who have used JWT in their recent projects, 89% hold at least a Bachelor's degree and 39% hold at least a Master's degree.
On average, freelancers in Berlin, Germany who have used JWT in their recent projects have 13 years of professional experience, with a single engagement typically lasting around 1.9 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 (16%).
The most common industries among freelancers in Berlin, Germany who have used JWT in their recent projects are Information Technology (89%), Banking and Finance (53%), and Manufacturing (37%).
The most common business areas among freelancers in Berlin, Germany who have used JWT in their recent projects are Product Development (100%), Information Technology (95%), and Quality Assurance (63%).
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
