REST API Expert in Switzerland
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Meet FRATCH Experts in Switzerland, who have recently used REST API
Nikita V.
Last position:
Salesforce Technical Architect at Fennia
- Designed and engineered a shared web component library for a customer portal serving 360,000+ private users and integrated the LWC framework with Storybook via Rollup.
- Resolved WCAG AA compliance issues to support strict accessibility requirements.
- Integrated legacy systems into a new portal via REST API to support existing products.
Max R.
Last position:
Senior ICT Solution Architect at ewb, Energy, Water
- Clarifying and discussing technical requirements and coordinating with the team
- Contributing to the objectives of the Digital Transformation Services unit and implementing them
- Analyzing, specifying, updating and delivering architecture models to implement digital solutions in line with business, data infrastructure and requirements
- Selecting suitable technical options for application design, considering interoperability, reversibility, scalability, usability, accessibility and security, and optimizing the cost/quality ratio
- Creating and maintaining concept documents, architecture models and other technical documentation
- Reviewing services to be provided and other documents for solution development
- Collaborating with the IT enterprise architect, business analyst, project manager, developers, testers and process owner on the design and documentation of technical specifications for new developments and enhancements
- Communicating concepts to relevant stakeholders and supporting them
- Participating in enterprise architecture activities and ensuring compliance with principles, standards and guidelines
- Monitoring compliance with defined designs at application, solution and enterprise levels
- Developing and testing existing and new solutions as required
- Supporting and guiding development teams in implementing new projects or maintaining existing products, taking on the product manager role if required
- Establishing and ensuring best practices in implementation, documentation, testing and packaging for distribution
- Contributing to the handling of reported incidents and requests assigned to third-level support, and following up as required
Mohamad K.
Last position:
Senior Backend Developer at Standing on Giants
- Led architecture and end-to-end engineering delivery for community-driven SaaS platforms serving 2M+ monthly active users.
- Architected and led the migration of a monolithic Python/FastAPI and PostgreSQL database and LangChain with codebase to an event-driven microservices architecture on AWS EKS, sustaining 10x traffic growth from ~150 RPS to 1,500+ RPS with zero re-architecture cycles.
- Defined and enforced engineering standards across services including API contracts, observability baselines, and deployment topology, reducing production incidents by 55% and MTTR from 2 hours to under 25 minutes within 9 months.
- Redesigned the caching and query layer using multi-tier Redis caching and database indexing/partitioning, cutting p95 API latency from 850ms to 180ms (78% reduction) and database CPU load by 45%.
- Built CI/CD platform on GitHub Actions, Terraform, and Kubernetes (EKS) with blue-green and canary rollouts, increasing deployment frequency from ~2/month to 8-12/day and reducing lead time from 10 days to under 6 hours.
- Implemented contract testing, automated load testing, and observability SLOs using Prometheus, Grafana, and OpenTelemetry, raising platform availability from 99.5% to 99.95% (10x reduction in error budget burn).
- Led and grew a cross-functional team of 8 engineers across backend, frontend, and DevOps, scaling headcount from 4 to 8 with 85% retention; owned hiring, onboarding, performance reviews, and career development.
- Partnered with Product, Design, and Client Success leadership as primary technical decision-maker; translated business goals into technical roadmaps and drove build-vs-buy decisions on authentication, search, and AI tooling.
- Introduced AI-assisted development workflows including automated code review and a RAG-based internal knowledge assistant using Graph (GraphRAG, Neo4J), increasing sprint throughput by 30% across two quarters.
- Owned incident command and production support rotation; established runbooks, postmortem culture, and on-call SLOs, reducing weekend paging incidents by 70%.
- Developed and optimized Algorithms using python libraries like Numpy and Pandas.
Urs S.
Last position:
CargoMonitor App at MSR Electronics GmbH
MVP app for shock logger to monitor and analyze transport data via BLE as a Kotlin Multiplatform solution for Android and iOS.
Christoph P.
Last position:
ICT DevSecOps Engineer & Security Coordinator at Abraxas Informatik AG
- Interface role with the SOC team; improved incident response time by 45% through structured escalation processes and proactive security monitoring.
- Defined technical standards for a multi-tenant enterprise platform (10+ services), resulting in a 30% shorter onboarding time for new clients in the public sector.
- Active knowledge transfer and mentoring of a 6-person team; increased team autonomy and established a sustainable engineering culture.
- Reduced time to market by 50% by optimizing CI/CD pipelines and establishing self-service deployments.
- Stack: GitLab CI/CD, Kubernetes, Nexus, Harbor, ArgoCD, HashiCorp Vault, Grafana, Python, PostgreSQL, Java, Spring Boot, Flyway, Quarkus, JBoss, Loki, Go, Kafka, Kustomize, MongoDB
Piotr C.
Last position:
Full Stack Software Developer at Meteomatics AG
- Created the MetX Assistant and was its primary driver from concept through production with real users; designed and oversaw telemetry and presented the system in demos.
- Built React, TypeScript and Python features for MetX, a scientific weather visualization platform; integrated internal data APIs and improved caching, request handling and rendering workflows.
- Contributed to company MCP tooling and led AI workshops and internal automation initiatives, including experiments connecting AI agents with Slack, Jira and Git.
- Acted as the team's Observability and DevOps subject matter expert, supporting service reliability, deployment workflows, monitoring and troubleshooting.
- Participated in Security, Observability and AI Communities of Practice.
Detlef W.
Last position:
Sourcing Manager at BEDAG Informatik AG
- Solely responsible for managing procurement operations
- WTO tenders in an open procedure
- Invitation process
- Direct call-offs and mini-tenders from framework contracts
- Simap.ch, SuisseOffer.ch, Confluence, Jira, Microsoft 365 applications
Malik O.
Last position:
AI Scientist at SQPS
- Intelligent Document Processing Engine with OCR & Computer Vision: Architected the end-to-end AI pipeline at the core of the SQPS GenAI document-processing product, which turns scanned paper and PDF batches into organised, searchable documents, combining image pre-processing, OCR and layout analysis for mixed-quality scans. Technologies: Python, OpenCV, Tesseract / PaddleOCR, PyTorch, FastAPI
- Automatic Document Splitting & Classification: Developed models that detect where one document ends and the next begins inside a single multi-document scan, and classify each one by type (invoices, contracts, letters, reports) to enable fully automated filing. Technologies: Python, PyTorch, scikit-learn, Hugging Face Transformers
- Information Extraction & Intelligent File Naming with LLMs: Implemented an LLM-based GenAI extraction system that reads dates, names and reference numbers from unstructured documents and uses them to generate consistent, rule-based file names, with configurable naming conventions per organisation. Technologies: Python, LangChain, OpenAI, SentenceTransformers, SQL
Gergely G.
Last position:
Blazor Founder, Certified Points of You® Business Trainer, Full Stack ASP.NET Core Developer Employee Training at Resonance Solutions GmbH
Markus S.
Last position:
Domain Architect Core Party Data at ING DiBa AG
Technologies: Confluence, PlantUML, BPMN
- As part of the modernization of ING DiBa, the master data management system is also being renewed. As the Domain Architect for this topic, I had to find a way to combine global solution approaches from the headquarters in Amsterdam with local requirements from the German branch in Frankfurt.
Yuri G.
Last position:
Senior Security Devops Engineer at Swisscom
- Implementation and maintenance of highly critical IAM solutions for B2B clients (SSO, MFA, SAML/OIDC, Entra ID, PIM/PAM)
- Security administration of Linux systems (CentOS, Red Hat) in Docker and Kubernetes environments
- Migration from Docker Swarm to Kubernetes
- Infrastructure automation with Terraform
- Planning and execution of risk assessments, threat modeling, and compliance reports
- Development and management of B2B applications (Java, REST/SOAP, Angular) and CI/CD pipelines (Python, Ansible, Jenkins, GitLab)
- Leading integration tests and UAT (Cucumber, Selenium, Katalon)
- Implementing monitoring and observability strategies with Grafana, Prometheus, and Splunk
- Integrating SAST tools like Snyk and SonarQube
- Release management and project coordination according to Scrum and SAFe
- Mentoring and technical support of junior team members
Robin O.
Last position:
Co-Founder & AI Solutions Architect at airdys
- Product strategy, architecture, and technical co-direction
- AI workshops, client onboarding and go-to-market activities
- Design and implementation of AI architectures (LLMs, RAG, MCP, agents, voice, automation)
- Hands-on development of prototypes and production-ready AI integrations
- Consulting clients on AI adoption, workflows, and integration into existing infrastructure
- Collaboration with co-founders on strategic direction
- Collaboration in sales and customer acquisition
Tools and Technologies: OpenAI, Anthropic, Azure, Vercel AI SDK, RAG (Retrieval-Augmented Generation), MCP (Model Context Protocol), FastAgent, VAPI, n8n, make.com, LibreChat, PostgreSQL, OpenAPI, Next.js, Vercel, Docker
Gwang Jin K.
Last position:
Data Scientist / Applied AI, Automation & Data Systems Researcher at Independent
- Built and explored applied GenAI, RAG, GraphRAG, local LLM, agentic AI and document-intelligence prototypes for structured analysis, evidence extraction, semantic search, technical reasoning and decision-useful reporting
- Developed private local-LLM workflows and AI system patterns focused on privacy, reproducibility, reviewability, low-cost inference and practical user control
- Built reproducible Python/R workflows for data analysis, automation, API-driven tooling, validation logic, technical documentation and AI-assisted software development
- Designed workflows around explicit assumptions, traceable inputs, reviewable outputs and failure-mode awareness rather than black-box “looks good” demonstrations
- Supported RAHN AG in a chemical/regulatory environment with data extraction and processing around WERCS, a regulatory application for chemical product and compliance data
- Explored complex application/database schemas and wrote nested SQL queries to extract information for mixture calculations, component relationships, regulatory rules and reporting logic
- Continued hands-on development in Git/GitHub/GitLab/Bitbucket, Docker/Linux deployment patterns, REST/API workflows, error handling, technical writing and fast AI-assisted prototyping
- Built technical writing and documentation workflows that turn complex systems into clear runbooks, checklists, decision notes and user-facing explanations
Christian Z.
Last position:
Software-Architect / Engineer at applyo gmbh
- Scalable platform for children and parents to discover future skills and technologies in a way that suits them
- React web frontend with microservice architecture in the backend (.Net Core, Azure Storage, Azure Entra ID, REST API)
Roland A.
Last position:
Project Manager and Senior Business Analyst at Init Services GmbH
- Project management: Implementation of SAP & EBX integration for master and reference data management and led development of AI supported services for data management and privacy-oriented solutions
- Business analysis: Executed in-depth requirement gathering and data analyzes for MDM implementation, supported service integration using REST APIs to enhance service interoperability, led the requirement gathering, analysis, and implementation of agent-based AI services
- Technologies: SAP BP & FICO & MM, Tibco EBX, n8n, custom AI development in Java, Python, RDBMS, cloud
Discover over 15,000 top freelancers
Statistics of experts using REST API
Aggregated from the professional profiles of matched freelancers.
Experience
22 years
Position duration
1.9 years
Positions per freelancer
14
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Professional Services
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
91%
Master's degree or higher
60%
Doctorate
9%
Certifications per freelancer
4
Most common languages
English, German, French
Speak two or more languages
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 Switzerland 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 Switzerland using REST API
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.
REST API 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 (95%)
- Banking and Finance (73%)
- Professional Services (45%)
- Insurance (41%)
- Manufacturing (41%)
- Government and Administration (41%)
- Media and Entertainment (39%)
- Retail (36%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What REST APIs do
REST API, short for Representational State Transfer application programming interface, lets software exchange resources over HTTP. It commonly uses JSON responses and standard methods such as GET, POST, PUT and DELETE. Companies use it to connect web applications, mobile products, internal systems and external services.
Where they fit
REST APIs sit between user-facing products and the systems that store or process data. They support customer portals, mobile back ends, payment flows, product catalogs, logistics tools and partner integrations. In Switzerland, they are common in financial services, healthcare, manufacturing and other organisations that need dependable system connections.
- Expose business data to web and mobile clients
- Connect internal applications with SaaS services
- Provide partner access with controlled permissions
- Support integrations across cloud and on-premise systems
Ecosystem and tooling
Strong REST API work combines HTTP design with a wider delivery stack. Professionals may use OpenAPI or Swagger for contracts and documentation, Postman for exploratory checks, and automated test frameworks for regression coverage. Gateways, reverse proxies, Docker, Kubernetes, CI pipelines and observability tools help operate APIs safely at scale.
Skills companies need
Companies bring in freelance expertise when an existing interface is inconsistent, poorly documented or difficult to extend. Specialists can define resource models, status codes, error formats, pagination and versioning rules, then connect those decisions to databases, queues and identity services. They also review API contracts before implementation creates costly dependencies.
- Design clear endpoints and request or response schemas
- Implement authentication, authorisation and rate controls
- Document contracts with OpenAPI
- Test compatibility, failure handling and security
Delivery and collaboration
REST API projects often involve several teams, so clear contracts and written decisions matter. Remote professionals can work effectively through version control, API specifications, test collections and shared environments. On-site collaboration in Switzerland can help when interfaces touch regulated processes, legacy systems or complex stakeholder groups, but the right setup depends on access and communication needs.
What good looks like
A strong professional treats an API as a durable product rather than a collection of endpoints. They make naming, validation, status codes, idempotency, pagination and error handling predictable. They protect sensitive data, explain trade-offs clearly and leave maintainable documentation, tests and monitoring behind. Experience with REST API alternatives such as GraphQL or gRPC is useful when a different interaction model better fits the system.
Frequently asked questions
What clients ask us most about REST API — answered in short.
A REST API lets software exchange resources through HTTP, often using JSON. Companies use it to connect websites, mobile applications, databases, internal tools and external services.
A REST API exposes resource-oriented endpoints and works naturally with standard HTTP concepts. GraphQL gives clients more control over queried fields, while gRPC uses strongly typed contracts and efficient binary communication; the right choice depends on client needs, latency, tooling and team expertise.
A strong REST API professional usually understands HTTP, JSON, databases, authentication and automated testing. Useful adjacent skills include OpenAPI, OAuth, API gateways, cloud deployment, observability and CI pipelines.
The right level for a REST API project depends on its risk and scope, not on a fixed experience threshold. A small integration may need focused implementation skills, while a public or regulated interface calls for someone who can shape contracts, security, versioning, operations and team standards.
Yes, REST API work is often well suited to remote collaboration through repositories, OpenAPI documents, test collections and shared environments. On-site work in Switzerland can still help when access controls, legacy infrastructure or stakeholder workshops require physical presence.
Assess whether a REST API has consistent resource naming, useful documentation, predictable status codes and clear error responses. Review authentication, validation, automated tests, monitoring, versioning and how the interface behaves under failure and change.
Bring in a REST API specialist when integrations are slowing delivery, contracts keep changing or different clients receive inconsistent behaviour. External expertise is also valuable for modernising legacy interfaces, preparing a public API or establishing standards across several teams.
A REST API freelancer may deliver endpoint designs, OpenAPI specifications, implementation, authentication flows, test coverage and technical documentation. Depending on the assignment, they can also improve gateway configuration, deployment pipelines, monitoring and the migration path from an older interface.
The average hourly rate of freelancers in Switzerland who have used REST API in their recent projects is 111 €, which corresponds to a daily rate of about 889 € based on an 8-hour working day.
Of the freelancers in Switzerland who have used REST API in their recent projects, 91% hold at least a Bachelor's degree, 60% hold at least a Master's degree, and 9% hold a doctorate.
On average, freelancers in Switzerland who have used REST API in their recent projects have 22 years of professional experience, with a single engagement typically lasting around 1.9 years.
The most common languages among freelancers in Switzerland who have used REST API in their recent projects are English (95%), German (93%), and French (41%).
The most common industries among freelancers in Switzerland who have used REST API in their recent projects are Information Technology (95%), Banking and Finance (73%), and Professional Services (45%).
The most common business areas among freelancers in Switzerland who have used REST API in their recent projects are Information Technology (100%), Product Development (86%), and Quality Assurance (57%).
Main locations of FRATCH Experts, who have recently used REST API
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.
Zurich 
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