API Gateway Expert in Berlin
to secure and scale connected services with fast, precise AI matchingHire experts who design API gateways, protect microservices and connect REST, GraphQL or event-driven systems. FRATCH matches you quickly with vetted, available freelancers whose experience fits your architecture, delivery model and project goals.
Meet FRATCH Experts in Berlin, who have recently used API Gateway
Vili D.
Last position:
Technical Lead, Data Engineer at Mercedes-Benz Consulting
Optimized the data architecture (Medallion) to better decouple processing steps and improve transparency and reproducibility
Ensured the technical quality of data processing in Databricks by introducing schema enforcement, data quality checks, and a structured data architecture
Pipeline orchestration with Azure Data Factory
Improved and automated the development and deployment process by integrating Git and GitHub Actions
Technical leadership of the Data Engineering team (3 employees)
Led workshops to optimize and stabilize the data platform and development process
Collected and prioritized new requests and maintained the product backlog
Technologies: Microsoft Azure (Data Lake, Data Factory), Databricks, Apache Spark (PySpark), Python, SQL, Git, Confluence, Power BI, Power Apps, Dataverse, MS Sharepoint, Mural
Jorge P.
Last position:
Software Engineer – AWS and Kubernetes Specialist at Citti
- Creation, maintenance and hardening of Kubernetes clusters employing Ansible and ArgoCD
- Keywords: Ansible, AWX, Kubernetes, NetApp, Prometheus, CI/CD ArgoCD, SSO, Fluent-bit, HAProxy, Calico, Keycloak, oauth2-proxy, SealedSecrets, kubeseal, Aqua kube-bench, CIS-Benchmarks, Aqua Trivy operator
Hamza K.
Last position:
Academic Research Contributor in Health Sector (Volunteer) at n/a
- Acted as technical consultant to optimize multi-layer ensemble models combining ResNet, CNN-BiGRU-Attention, and XGBoost.
- Guided implementation of a Logistic Regression meta-learner to solve class imbalance problems, achieving 92.86% accuracy and 0.9644 AUC on PTB-XL and Chapman-Shaoxing datasets.
Unnikuttan V.
Last position:
Managing Director (Co-Founder) at AathmaSignals
- Spearheading investor outreach and partnership development as founding MD, building the business case and technical narrative needed to attract initial funding and strategic collaborators in the digital health space
- Designing multi-agent AI systems for autonomous biosignal analysis, orchestrating LLM-based reasoning pipelines with domain-specific medical context to enable intelligent, clinical decision support
Qaiser A.
Last position:
Freelance Lead DevOps Engineer at Schwarz Gruppe Produktion
Bootstrapping a CloudOps team and building a multi-cloud provider backend for a low-code Internal Developer Platform (IDP) with env zero
Introducing user story mapping, ADRs, milestones, and backlog management
Designing and developing core APIs, setting up CI/CD pipelines, OpenTofu/Terraform scripts
Representing and communicating the team with third-party stakeholders (e.g. env zero)
(Cross-)team coaching on DevOps, software design, Terraform, Golang, and agile practices
Marina K.
Last position:
Independent Software Developer at LILARAUM
- Independently designed, developed, published, and maintained mobile games for iOS and Android.
- Implemented application architecture, gameplay systems, UI, monetization, analytics, and platform integrations.
- Managed the complete release lifecycle, including testing, store publication, production monitoring, and iterative improvements based on analytics.
Fady K.
Last position:
Senior Software Developer / Tech Lead at Specific Objects Technologies GmbH
- Project 1: Multi-Tenant SaaS Platform: Data Integration & Pricing Management
- Objective: New development of ELT pipeline (replacement for Java 6 legacy), integration of heterogeneous source systems (CSV, Excel, Email, external DBs), event-sourcing for complete auditability, multi-tenant architecture for tenant-capable data processing
- Challenge: Processing millions of records daily, audit compliance, data isolation between different tenants
- Solution: Stakeholder workshops for requirements analysis, event-driven architecture with Axon Framework and Apache Kafka, AWS services (EC2, S3, Lambda, SQS, API Gateway) for cloud integration, PostgreSQL with tenant-specific schemas for multi-tenant data isolation, REST API design with Spring Boot for external system integrations, comprehensive testing strategy (JUnit, Spring Test, Postman, PACT, ArchUnit)
- Results: ELT performance improved from 30+ min to 1-5 min; 2-3 hours daily saved through workflow automation; 10-20 hours/week saved through event-sourcing auditability; 100% audit compliance; secure multi-tenant data isolation for 10+ tenants
- Project 2: Multi-tenant CRM System Modernization
- Objective: Migration of CRM system (20+ years PHP/MySQL) to Java microservices, Domain-Driven Design implementation, establishment of Test-Driven Development, multi-tenant-capable SaaS architecture for multiple customer tenants
- Challenge: Remodeling complex business logic, no existing test culture, scalable tenant management with data isolation
- Solution: Comprehensive testing strategy (JUnit, Spring Test, Postman, PACT, ArchUnit), multi-tenant architecture with tenant-specific databases, REST API design with Spring Boot for cross-tenant integration, Kubernetes and Docker for container orchestration
- Results: 2× performance improvement; deployment time reduced from 40+ min to 5-7 min; migration without production outages; scalable multi-tenant solution for 15+ customer tenants
- Technologies: Java, Spring Boot 3.x, Angular, Apache Kafka, AWS (EC2, S3, Lambda, SQS, API Gateway), PostgreSQL, Axon Framework, Kubernetes, Docker, GitLab CI, REST API
Tino T.
Last position:
Director Technology at Forte Digital Germany
- Leading 20+ staff in development, site reliability engineering, and architecture.
- Leading the group-wide agentic AI initiative (Norway, Poland, Germany).
- Hands-on solution architect and AI consultant for over 50% of my working time on client projects in the publishing sector – from local publishers to international corporations.
- Strategic consulting and technical implementation of AI workflow platforms (n8n, Workato).
- Developing prototypes for traditional, AI-based, and agentic AI workflows.
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.
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.
Haseeb A.
Last position:
Full Stack Ruby on Rails Developer at FINLINK
- Delivered MVP for strategic enterprise client including core Links banking APIs and interest rate calculations
- Integrated German banking APIs for automated credit checks
- Built lead distribution system that improved sales team efficiency by 40%
- Developed microservices architecture for mortgage offer generation from multiple banks
- Automated document verification process for customer KYC and income validation
- Implemented GDPR-compliant consent management for customer data protection
- Deployed and managed services using Kubernetes with custom YAML configurations
- Wrote comprehensive test coverage using Rspec ensuring code reliability
- Reduced customer onboarding time by 30% through workflow optimization
Discover over 15,000 top freelancers
Statistics of experts using API Gateway
Aggregated from the professional profiles of matched freelancers.
Experience
14 years (Germany: 17 years)
Position duration
2.6 years (Germany: 2.3 years)
Positions per freelancer
7 (Germany: 11)
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Automotive, Banking and Finance
Certification focus areas
Information Technology, Product Development, Quality Assurance
Bachelor's degree or higher
100% (Germany: 96%)
Master's degree or higher
64% (Germany: 62%)
Doctorate
9%
Certifications per freelancer
2 (Germany: 3)
Most common languages
German, English, Hindi
Speak two or more languages
100% (Germany: 99%)
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 API Gateway
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.
API Gateway 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%)
- Automotive (45%)
- Banking and Finance (45%)
- Education (36%)
- Media and Entertainment (27%)
- Aerospace and Defense (18%)
- Healthcare (18%)
- Insurance (18%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What an API Gateway does
An API Gateway is the controlled entry point between clients and backend services. It routes requests, applies authentication and authorization, transforms payloads, and can combine responses from several services. It gives teams one place to manage external access without exposing internal service details.
Where it is used
Companies use API gateways for customer applications, partner integrations, mobile backends and internal service communication. They are common in microservice environments where traffic, security and versioning must be managed consistently.
- Route REST, GraphQL and gRPC requests
- Protect services with tokens, keys and policies
- Aggregate responses for web and mobile clients
- Manage throttling, caching and API versions
Ecosystem and tooling
The right specialist may work with Amazon API Gateway, Azure API Management, Google Apigee, Kong Gateway, NGINX or Tyk. Relevant tooling also includes Kubernetes ingress, service meshes, OpenAPI specifications, OAuth, JWT, Terraform and observability stacks. The choice depends on hosting, traffic patterns, governance and operational ownership.
When companies need expertise
Freelance specialists are useful when a company is splitting a monolith, exposing services to partners or replacing inconsistent edge logic. They can assess an existing gateway, define policies, migrate routes and document contracts without slowing product teams.
- Several services need one stable public interface
- Authentication and access rules differ across consumers
- Releases require controlled routing or API versioning
- Gateway latency, errors or limits are difficult to trace
Skills that matter
Strong professionals understand HTTP, networking, TLS, DNS and distributed systems. They connect gateway configuration with identity providers, cloud infrastructure, containers and CI/CD pipelines. They also know how to test failure paths, protect sensitive data and measure latency across the full request chain.
For teams in Berlin, collaboration may combine remote delivery with workshops on architecture, security or migration planning. Clear documentation and reliable communication matter when specialists work with product, security and operations groups in different locations.
How quality is judged
A capable API Gateway specialist starts with traffic flows and service boundaries rather than selecting a popular product by default. They design least-privilege policies, predictable error handling, health checks and safe rollout paths. Their work leaves behind maintainable configuration, useful runbooks and tests for authentication, routing, limits and outages.
Ask for examples of gateway migrations, policy design and production troubleshooting. Good professionals can explain trade-offs between managed services, proxy-based gateways and service-mesh approaches in terms your team can verify.
Frequently asked questions
Before you brief your next project: the most common questions about API Gateway.
An API Gateway provides a managed entry point for applications, partners and internal clients accessing backend services. It can route requests, enforce authentication, apply rate limits, transform data, cache responses and combine results from multiple services.
An API Gateway focuses on client-facing API policies, routing and composition, while a load balancer primarily distributes traffic across available targets. A service mesh manages service-to-service communication inside an environment, often with mutual TLS, retries and telemetry.
A strong API Gateway freelancer usually understands HTTP, TLS, DNS, OAuth, JWT, OpenAPI and distributed-system design. Cloud networking, Kubernetes, Terraform, CI/CD and observability are also valuable when the gateway is part of a larger delivery system.
The need depends on scope, risk and the number of services involved. A professional handling a production API Gateway should be able to show practical work with policy design, secure routing, migrations, failure testing and operational monitoring rather than only configuration knowledge.
Yes, most API Gateway work can be delivered remotely through shared repositories, infrastructure plans, architecture sessions and documented runbooks. On-site workshops in Berlin can still help when teams need to align on security boundaries, ownership or a complex migration.
A managed API Gateway is often suitable when a team wants built-in scaling, identity integration, analytics and lower operational overhead. A self-managed product may offer more control or portability, but it requires ownership of upgrades, resilience, security and capacity planning.
Ask the API Gateway specialist to explain a real routing or security decision, including its failure modes and operational impact. Strong answers cover least privilege, versioning, observability, rollback planning and how gateway behavior was tested under degraded conditions.
Common choices include Amazon API Gateway, Azure API Management, Google Apigee, Kong Gateway, NGINX and Tyk. The best fit depends on cloud alignment, protocol support, governance, integration needs and whether the company wants a managed or self-operated service.
The average hourly rate of freelancers in Berlin, Germany who have used API Gateway in their recent projects is 85 €, which corresponds to a daily rate of about 683 € based on an 8-hour working day.
Of the freelancers in Berlin, Germany who have used API Gateway in their recent projects, 100% hold at least a Bachelor's degree, 64% hold at least a Master's degree, and 9% hold a doctorate.
On average, freelancers in Berlin, Germany who have used API Gateway in their recent projects have 14 years of professional experience, with a single engagement typically lasting around 2.6 years.
The most common languages among freelancers in Berlin, Germany who have used API Gateway in their recent projects are German (100%), English (100%), and Hindi (18%).
The most common industries among freelancers in Berlin, Germany who have used API Gateway in their recent projects are Information Technology (100%), Automotive (45%), and Banking and Finance (45%).
The most common business areas among freelancers in Berlin, Germany who have used API Gateway in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (73%).
Main locations of FRATCH Experts, who have recently used API Gateway
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.
Munich 
Cologne 
Frankfurt Request a free demo
Get in touch with the FRATCH team and we will get back to you within 4 hours.
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Philipp Thomaschewski
FRATCH CEO
