API Security Experts in Germany
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Meet FRATCH Experts in Germany, who have recently used API Security
Ariel Lev
Last position:
Sr. Principal Engineer at Slalom
- Held direct line management responsibility for a team of 4 Platform Engineers — owning hiring, performance reviews, and career development — while establishing a shared engineering standards framework and coaching culture that accelerated delivery across client engagements.
- Led a team of engineers to architect a cloud-native voice AI system for a major inspection client, enabling 2,500 field inspectors to document work fully hands-free via real-time transcription and AI agents — eliminating manual data entry across 440,000 inspections per month and reducing per-user cost from $9 to $1. Stack: AWS (DynamoDB, S3, Transcribe, CloudFront, API Gateway, Bedrock), ElevenLabs, Claude.
- Led a team of engineers to automate multi-region Kubernetes cluster management for a global SaaS leader, reducing provisioning time from 3 weeks to under a day and eliminating 90% of configuration errors. Stack: EKS, Terragrunt, Python, Bash, ArgoCD.
- Accelerator - Cloud-Agnostic AI Platform: Architected and delivered a cloud-agnostic, Kubernetes-native platform as an accelerator, enabling multi-tenant, enterprise-scale management of self-hosted LLMs with concurrent deployment of multiple base models and dynamic LoRA adapter serving. Designed production infrastructure using open-source tooling (ArgoCD, Karpenter, vLLM, SGLang) with automated model lifecycle management, API security (Keycloak + LiteLLM), and cost-optimized GPU provisioning.
Hüseyin Korkut
Last position:
Senior Full-Stack Engineer at DVAG
Architecture and implementation of a fully digitalized closing flow for managing securities contracts within the DVAG infrastructure. The platform aims for maximum user-friendliness, modular extensibility and compliant handling of sensitive data.
Implementation of a reactive UI structure with a focus on user guidance & accessibility.
Dynamic control of form and closing processes including validation logic.
Reactive state management via SignalStore (signals + selective effects).
UX optimization through adaptive components and Playwright-based UI tests.
Backend modularization to connect existing sales and contract logic.
API stability and DTO design according to Clean Architecture principles.
Collaboration with domain teams to define technical contracts and service boundaries.
Management with GitHub.
Unit tests with Jest, E2E tests with Playwright.
Code reviews, CI-integrated test execution, iterative refactorings.
Ensuring high coverage and UI stability in the closing flow.
Technologies: Angular 18, RxJS, SignalStore, HTML5, SCSS, Spring Boot, Kotlin, REST, OAuth2, Jest, Playwright, Clean Architecture.
Ali Yazdani
Last position:
Principal Product Security Engineer at Payrails GmbH
- Defined and executed a comprehensive security roadmap: integrated Shift-Left Security, CNAPP, and DevSecOps principles to streamline secure product development and reduce risk exposure.
- Established a robust threat modeling framework: embedded security into design processes, enabling early identification of vulnerabilities and reducing potential risks.
- Developed a scalable Vulnerability Management program: accelerated detection and remediation of new vulnerabilities, significantly shortening the risk response cycle.
- Enhanced cloud and container security: leveraged advanced tools such as Tetragon to achieve deeper visibility and implement a defense-in-depth strategy.
- Automated security controls within CI/CD pipelines: integrated security measures into the development lifecycle to maintain continuous delivery with robust safeguards.
- Championed cross-functional collaboration: partnered with developers and infrastructure teams to prioritize threats and align remediation efforts, fostering a unified security culture.
- Ensured regulatory compliance and audit readiness: collaborated closely with the InfoSec team to adhere to internal policies and successfully support audits for standards like PCI-DSS and SOC2.
Ales Loncar
Last position:
Senior DevOps Consultant (Freelance) at European Union Agency (via IBM)
- Worked as freelance Senior DevOps Consultant on-site for IBM at a European Union Agency, operating in a highly secure, air-gapped environment managing classified systems.
- Led automation and DevOps initiatives for a large-scale OpenShift platform (>400 nodes), driving deployment efficiency, GitOps adoption, and operational automation using Ansible, Python, and Bash while ensuring compliance with security requirements.
- Spearheaded automation of release and deployment workflows in a private cloud environment hosting 400+ OpenShift nodes, significantly improving deployment speed and reliability.
- Migrated existing playbooks, roles, and templates from Ansible Tower to Ansible Automation Platform (AAP), ensuring full compliance with fully-qualified collection names (FQCN) and preparing custom Execution Environments (EE) for containerized automation.
- Implemented GitOps Agent for AAP Controller Configuration as Code, enabling automated synchronization (CRUD) of Ansible Controller objects based on repository-stored configuration definitions using GitHub webhooks.
- Designed and automated complex multi-step operational workflows including environment cleanup, Helix cluster component re-creation, Kafka topic management, and OpenShift object lifecycle management across ~100 environments.
- Achieved a reduction of multi-day manual operations to under a few hours through automation improvements spanning multiple AAP clusters and OpenShift environments.
- Integrated Ansible Automation Platform with Thycotic (Delinea) Secret Server via lookup plugin to enhance secure credential management in automated processes.
- Managed deployment tasks, platform troubleshooting, and Istio network configurations while adhering to stringent EU PSC security and compliance standards.
- Collaborated with infrastructure and application teams to refine deployment procedures, develop naming conventions, and continuously improve automation coverage in an air-gapped, classified environment.
Seyed Farhad Miri
Last position:
Senior Product Security Engineer at Delivery Hero
- Developed a custom tool using the Mistral 7B LLM to scan, validate and report security vulnerabilities.
- Security tested AI agents, bots, and other LLMs with a focus on prompt injection, model inversion, data poisoning, EDR/AV bypass and evasion techniques, membership inference, model evasion, overfitting to malicious inputs and contextual manipulation.
- Onboarded repositories to SAST solutions for security scanning, implemented secrets scanning, DAST, SCA, and utilized ZAP for DAST in CI/CD pipelines.
- Engaged in security awareness trainings, developed CTF challenges and training materials to enhance developer security knowledge.
- Planned and executed bi-annual red teaming operations based on the MITRE ATT&CK framework and led internal and external pentests based on the OWASP Top 10 framework for 70+ applications worldwide, resulting in detection, reporting, and remediation of hundreds of vulnerabilities.
- Triaged HackerOne reports.
Andreas Nolden
Last position:
Open Source Founder at Privatier
- AI-supported source code analysis
- AI image generation for a shirt shop
- AI-supported analysis of connected YouTube channels and commenting users
- AI-supported software prototyping
- Operation of a local AI environment
- 3D printing and scanning: development of a process to repair GfK parts using 3D-printed negative molds
The focus is on practical applications of new technologies, founding an open-source project for a yacht autopilot, as well as yacht refit and motorhome conversion.
Vishnu Kv
Last position:
Red Team Engineer (Professional Management Level VI) at Schwarz Group (Lidl, Kaufland, Stackit)
- Developed Red Team infrastructure for real-world attack simulations using Sliver C2 and custom tools
- Executed advanced Red Team operations, integrating AI/LLM security research for prompt injection attacks
- Conducted comprehensive breach assessment attacks and vulnerability assessments across enterprise infrastructure
- Performed root cause analysis and purple team exercises, generating executive-level reports
- Lead LLM red teaming initiatives to improve AI model security for GPT-4, Mistral, and internal GenAI models
Marcel Meyer
Last position:
Cloud-Architect, Senior Solution Architect, Senior Software-Engineer at Assignment of KPIs for the service landscape to record and analyse costs per user
- Technologies: GoLang, JavaScript, TypeScript, AWS, Terraform, Git
- Conception of AWS infrastructure and existing services
- Analysis of IAM accounts and roles
- Setup of Cost Explorer and CloudWatch monitoring
- Setup of DynamoDB and S3 persistence of collected information
- Reporting and cost calculation
- Conception of Terraform deployment
Nils Klawitter
Last position:
Vulnerability Management and Secure SDLC at DB InfraGO AG
- Successfully implemented vulnerability management with DefectDojo
- Advised on and implemented technical and procedural aspects of vulnerability management with DefectDojo
- Provided guidance on implementing a secure software development lifecycle
- Skills: GitLab, DefectDojo, Vulnerability Management, SCA, SAST, DAST, Python, Kubernetes, Argo CD, Docker, AWS, Azure, WhiteSource/Mend, Greenbone
Muhammad Fiaz
Last position:
Software Engineer at PLC Group
- Designed and maintained REST APIs connecting internal business systems with external accounting and HR tools.
- Implemented secure API authentication (JWT/OAuth2) and optimized query handling to improve data throughput by 40%.
- Built automated test suites and API documentation pipelines with Swagger and Postman.
- Worked closely with remote stakeholders to ensure seamless backend integration and version-controlled deployment.
Discover over 15,000 top freelancers
Statistics of experts using API Security
Aggregated from the professional profiles of matched freelancers.
Experience
15 years
Position duration
1.7 years
Positions per freelancer
10
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Manufacturing
Certification focus areas
Information Technology, Product Development, Business Intelligence
Bachelor's degree or higher
100%
Master's degree or higher
50%
Certifications per freelancer
4
Most common languages
English, German, Persian
Speak two or more languages
90%
Based on our profile pool as of 30 Aug 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Germany 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 Germany using API 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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
API protection
API security keeps services, apps, and partners from exposing data or actions to the wrong caller. It covers authentication, authorization, transport security, and request validation for REST, GraphQL, and event-driven interfaces. Strong experts design controls that fit how the API is actually used.
Common work
- Secure public and partner APIs
- Review OAuth 2.0, JWT, and API key flows
- Validate schemas, payloads, and rate limits
- Harden API gateways and WAF rules
- Reduce abuse, scraping, and broken access control
Tooling and standards
Good professionals know the API gateway, identity, and testing layer together. They work with OpenAPI, OAuth 2.0, OpenID Connect, JWT, mTLS, schema validation, and security testing tools. They also understand how these pieces behave across microservices, mobile backends, and third-party integrations.
When to bring in help
Companies usually need freelance API security expertise when an API is going public, changing auth logic, or connecting to sensitive systems. In Germany, this often comes up in finance, insurance, SaaS, manufacturing, and e-commerce teams that need clear controls and clean handoffs. Remote work is common, but workshops on-site can help when access rules and trust boundaries are still unclear.
What strong experts deliver
A strong specialist spots weak authorization, inconsistent token handling, missing input checks, and gaps between documentation and runtime behavior. They write clear remediation steps, support secure design reviews, and help teams avoid fixes that break clients. They should be able to explain trade-offs in plain words.
Signs you need an expert
You may need outside help if you are shipping a new API platform, exposing legacy systems, or seeing unusual traffic and account misuse. It also helps when multiple teams publish APIs and security rules are no longer consistent. The best experts leave you with patterns the team can keep using after the project ends.
Frequently asked questions
Quick answers to the questions that come up most around API Security.
API Security covers the controls that decide who can call an API, what they can do, and how requests are checked before they reach business logic. That includes authentication, authorization, token handling, input validation, transport protection, and abuse controls such as throttling. It is about keeping data and actions limited to the right callers.
API Security focuses on the API layer itself, while IAM manages identities and permissions across systems. A WAF can block some attacks at the edge, but it does not replace API-specific checks like broken object level authorization, schema validation, or token misuse detection. In practice, the best setups combine all three.
A strong API Security specialist usually knows OAuth 2.0, OpenID Connect, JWT, mTLS, API gateways, and OpenAPI. They should also understand secure coding habits, threat modeling, and how microservices and backend services expose risk. Experience with testing and incident review is a plus.
API Security is used to protect customer-facing APIs, partner integrations, internal service calls, and mobile backends. It is also common when teams publish GraphQL endpoints, move to microservices, or connect older systems to modern apps. The goal is to keep data flows controlled without slowing delivery too much.
A API Security project can start with one strong specialist if the scope is focused, such as reviewing one gateway or one set of auth flows. Broader programs, especially across many services, usually need someone who can define patterns and coach the team. The right level depends on how many APIs and teams are involved.
Yes, API Security work is often done remotely, especially for design reviews, policy checks, and testing support. For teams in Germany, a short on-site workshop can still help at the start of a project, mainly when stakeholders need to align on risk and access rules. Many specialists work well in a hybrid setup.
A good API Security expert can explain risks in the API flow itself, not just list generic best practices. Look for clear examples of broken authorization fixes, token handling reviews, gateway policy design, and practical testing methods. Strong output is specific, documented, and usable by the team after handover.
API Security is the broader discipline. GraphQL security is one part of it and adds concerns such as query depth, resolver access, and field-level exposure. A specialist should know both, because GraphQL often needs API controls plus extra query-level checks.
The average hourly rate of freelancers in Germany who have used API Security 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 Germany who have used API Security in their recent projects, 100% hold at least a Bachelor's degree and 50% hold at least a Master's degree.
On average, freelancers in Germany who have used API Security in their recent projects have 15 years of professional experience, with a single engagement typically lasting around 1.7 years.
The most common languages among freelancers in Germany who have used API Security in their recent projects are English (100%), German (70%), and Persian (10%).
The most common industries among freelancers in Germany who have used API Security in their recent projects are Information Technology (100%), Banking and Finance (60%), and Manufacturing (60%).
The most common business areas among freelancers in Germany who have used API Security in their recent projects are Information Technology (100%), Product Development (80%), and Quality Assurance (70%).
Main locations of FRATCH Experts, who have recently used API 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 Request a free demo
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Philipp Thomaschewski
FRATCH CEO
