REST API Experts in Switzerland
, matched with vetted freelancers in minutesHire experts who design resource-based interfaces, connect web and mobile applications, and secure integrations with OAuth, OpenAPI and JSON. FRATCH uses fast, precise AI matching to help you find vetted, available freelancers for your REST API project.
Meet FRATCH Experts in Switzerland, who have recently used REST API
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
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.
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
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
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
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
Max R.
Last position:
ICT Solution Architect Senior at ewb, Energy, Water
- Questioning and discussion of technical requirements and coordination with the team
- Contributing to objectives of the Digital Transformation Services unit and implementation of objectives
- 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 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 IT enterprise architect, business analyst, project manager, developers, testers and process owner in design and documentation of technical specifications for new and further developments
- Communicating and supporting concepts to relevant stakeholders
- Participating in enterprise architecture activities and ensuring compliance with principles, standards and guidelines
- Monitoring compliance with defined design at application, solution and enterprise level
- Developing and testing existing and new solutions as required
- Supporting and guiding development teams in implementation of new projects or maintenance of existing products, assuming product manager role if required
- Establishing and ensuring best practice in implementation, documentation, testing and packaging for distribution
- Contributing to handling of reported incidents and requests assigned to third level support and follow-up actions as required
Daniel S.
Last position:
Senior Manager at devpoint GmbH
- Design and co-implementation of an insolvency management platform in Germany for a client (based on an AI development tool)
- Concept, requirements engineering, and implementation support for a Dubai-based company to integrate processes into a CRM
- Business analysis and requirements engineering at Swisscom for integrations
- Integration of a new knowledge management system into the business processes at Swisscom AG – REST API definition
- Project manager, consultant, and sparring partner for the realignment/process digitalization at GIB Solutions AG
- Process designer and prototype for an AI-based real estate marketing system in Dubai
- Interim head of the ICT department at a telecom company, reorganizing and optimizing processes with a team of 5 at GIB Solutions AG
- Agile requirements engineer / external PO for a web-based solution for the German company DEHN AG
- Project management and consulting for the existing marketing and campaign planning solution at Swisscom AG
- Building the ALoHA nearshore offering at devpoint
Ahmed R.
Last position:
AI & Automation Engineer at Teosek GmbH
- Build prototypes, expand AI skills, and practical application in a startup context.
- Transition phase: further training in prompt engineering, APIs, AI, working on independent prototype projects, and collaborating at a friend's startup.
- Technologies: LangChain, REST, Python, Java, JS, TS, Node.
Peter S.
Last position:
Web Application Developer PHP / WordPress Plugin Development at Gemeinde Bauma
- Analysis, consulting, and development of a WordPress application for the digital processing and delivery of the Bauma chronicle archive
Patrick R.
Last position:
DevOps Engineer at Swisscard AECS AG
- PoC for various platform integration functionalities using Backstage and Crossplane
- Implementation of improvements of developer experience with Azure AVD and DevSpace
- Manage application deployment infrastructure on Kubernetes clusters
- Manage CI/CD platform
- Manage deployments into Kubernetes (Rancher and AKS) and into Azure
- Act as security champion of the DevOps team
- Manage vulnerabilities and support dev teams to manage third-party vulnerabilities using JFrog Xray
- Support building the platform team
- Manage infrastructure as code using Terraform and Atlantis
- Build and integrate a platform and IDP using Crossplane
Karim I.
Last position:
Test Engineer at Ixtrac AG for Swica
- Building a framework for automated website testing
- Testing, regression testing
- Defect management
- Release management, UAT, agile testing
- Feature discussions with business
- Test management
Yassin B.
Last position:
Senior Software Development Engineer in Test (SDET) at Schweizerweg Gmbh
- Designed and executed automated and manual test cases for REST APIs and UI workflows using Selenide, Selenium, and Postman.
- Developed and maintained Gatling-based performance tests for simulating user load and validating system responsiveness and stability under stress.
- Integrated test suites into CI/CD pipelines with Jenkins, enabling rapid and reliable delivery cycles.
- Employed Splunk, Grafana, and Prometheus to monitor logs, track metrics, and perform in-depth application performance monitoring (APM).
- Utilized Swagger for validating and documenting API contracts and ensuring consistency across environments.
- Created and managed isolated test environments using Docker, enabling reproducible and consistent test execution.
- Collaborated with cross-functional teams using Confluence, Jira, and Bitbucket for agile planning, documentation, and version control.
- Worked in a Java/Spring Boot tech stack, leveraging Maven for project build automation and IntelliJ IDEA for development and debugging.
Key Achievements:
- Built a reusable Selenide-based UI automation framework that reduced test creation time by over 50%.
- Automated end-to-end test scenarios for critical business workflows, increasing test coverage and release confidence.
- Designed a modular Gatling load testing framework, used for continuous performance benchmarking.
- Detected and resolved several critical production performance issues through proactive APM and stress testing.
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
6%
Certifications per freelancer
4
Most common languages
English, German, French
Speak two or more languages
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 Switzerland 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 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 19 Sep 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 (74%)
- Professional Services (49%)
- Insurance (42%)
- Government and Administration (42%)
- Manufacturing (37%)
- Media and Entertainment (37%)
- Retail (37%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What REST APIs do
A REST API is a web interface that lets applications exchange data through standard HTTP requests. It models business resources such as customers, orders or documents and commonly returns JSON. REST, short for Representational State Transfer, supports modular systems that can evolve without tightly coupling every client and service.
Where they fit
REST APIs connect browser applications, mobile products, partner services and internal systems. Companies use them for commerce, banking, logistics, healthcare, manufacturing and public services. They can expose account workflows, product catalogues, payment flows, reporting data and operational processes to approved consumers.
- Connect frontend applications to backend services
- Expose data for mobile and partner applications
- Integrate SaaS, ERP and CRM systems
- Support service-oriented and cloud architectures
Ecosystem and tooling
Strong REST API work includes HTTP semantics, resource modelling, status codes, pagination, filtering and versioning. Experts often use OpenAPI or Swagger for contracts and documentation, JSON Schema for validation, and tools such as Postman for testing. OAuth, OpenID Connect, API gateways, logging and automated pipelines round out the delivery stack.
When expertise matters
Freelance expertise is useful when an API must replace fragile point-to-point integrations, support a new product or open selected capabilities to partners. It also helps when documentation is incomplete, performance is inconsistent or several teams interpret the contract differently. In Switzerland, remote collaboration is common, while regulated or complex organisations may also need on-site workshops and clear communication in English or a local business language.
- Define a stable contract before implementation
- Modernise legacy endpoints and integrations
- Add authentication, permissions and audit trails
- Improve testing, observability and documentation
What strong professionals deliver
The best professionals start with consumer needs and business resources rather than designing endpoints in isolation. They create consistent naming, predictable errors, useful documentation and backward-compatible changes. They also test unhappy paths, protect sensitive data, manage rate limits and explain trade-offs to product, security and operations teams.
Choosing the right specialist
Review API specifications, example contracts and evidence of integrations that resemble your system. Ask how the professional handles breaking changes, idempotency, pagination, retries, caching and access control. A good specialist can work with an existing stack, challenge unclear requirements and leave behind maintainable code, tests and documentation that other teams can use confidently.
Frequently asked questions
What clients ask us most about REST API — answered in short.
A REST API lets software systems exchange resources over HTTP, often using JSON. Companies use it to connect web and mobile interfaces with backend services, partner systems, databases and business workflows.
A REST API uses resource-oriented endpoints and standard HTTP behaviour, which makes it familiar and widely supported. GraphQL gives clients more control over returned data, while SOAP provides stricter contracts and established enterprise features; the right choice depends on governance, consumers and integration needs.
A REST API specialist should understand backend programming, databases, authentication and automated testing. Useful adjacent skills include OpenAPI, OAuth or OpenID Connect, API gateways, cloud deployment, observability and secure handling of personal data.
A REST API project needs enough experience to model resources, define contracts and anticipate how clients will evolve. The scope, security requirements, integrations and operational risks matter more than a fixed time threshold, so assess comparable delivery work and technical reasoning.
Yes, REST API work is often well suited to remote collaboration because specifications, repositories and test environments can be shared online. On-site workshops may still help with domain discovery, security reviews or coordination across Swiss business and technology teams.
A REST API is easier to trust when its contract, authentication model, errors and versioning rules are clear. Check automated tests, OpenAPI documentation, security controls, monitoring and whether a new consumer could integrate without informal explanations.
A REST API freelancer should clarify consumers, resources, data ownership, authentication, expected traffic and compatibility constraints. They should also confirm how errors, pagination, retries, releases and support responsibilities will be handled.
A RESTful API may be a poor fit when clients need highly flexible queries, continuous event streams or strict message-driven workflows. GraphQL, WebSockets, webhooks or asynchronous messaging can complement or replace REST where those interaction patterns are central.
The average hourly rate of freelancers in Switzerland who have used REST API in their recent projects is 112 €, which corresponds to a daily rate of about 899 € 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 6% 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 (40%).
The most common industries among freelancers in Switzerland who have used REST API in their recent projects are Information Technology (95%), Banking and Finance (74%), and Professional Services (49%).
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 (56%).
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 Request a free demo
Get in touch with the FRATCH team and we will get back to you within 4 hours.
Would you rather directly get in touch?
We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
