JSON Experts in Switzerland
matched in minutes from over 15,000 CVs with the power of AIHire experts who design reliable data structures, integrate REST and GraphQL APIs, validate payloads with JSON Schema, and connect applications across cloud and enterprise systems. FRATCH matches you quickly and precisely with vetted, available freelancers.
Meet FRATCH Experts in Switzerland, who have recently used JSON
Paulo M.
Last position:
Power BI / Fabric & SAP BI Consultant at Financial Bank
- Developed Power BI semantic models, DAX and RLS, improving reporting performance and security.
- Designed Fabric Lakehouse with Medallion Architecture (Bronze/Silver/Gold), accelerating data processing and improving maintainability and scalability.
- Built Fabric Data Factory pipelines and PySpark transformations, reducing processing time by 40%.
- Delivered automated Power BI KPI dashboards, accelerating reporting and decision-making.
- Supported SAP BO 4.3 → 2025 migration across 2,000+ Webl reports and 34 universes, reducing testing effort by 35% and improving migration quality and reliability.
- Optimized UNX universes, reducing query execution time by 40%.
- Optimized SAP BO reporting solutions, improving reliability and reducing manual effort.
Environment: Power BI, Microsoft Fabric (Lakehouse, Warehouse, Pipelines, PySpark), Tabular Editor, DAX Studio, SAP BI (BO 4.3/2025, Webl, UNX Universes), 360Suite, InfoBurst, GitHub, JIRA.
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
Reinhold S.
Last position:
Senior Software Developer at Hitachi Energy
- Support and further development of the Leegoo Builder
- Handling ad hoc requests
- Definition of rules/attributes and their rules
- Optimizing and managing SQL queries
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
Reto B.
Last position:
Managing Director at Atsoft GmbH
- Consulting in ICT, business processes, system architecture, web integration, client-server computing, cross-platform development, responsive web design, social media integration, GUI
- Custom and specialized solutions
- Applications for small and medium-sized enterprises
- Web services, web applications, portals, application extensions (add-ins, plug-ins)
- Database design, interface solutions
- Outsourcing in various industries
- Solutions for other software houses
- Project management and project support (software engineering, coding)
Sibylle H.
Last position:
SAP Development ABAP-OO (cross-module) at Asendia
- Created interfaces for transferring SD orders and customer master data (including various protocols and the ability to process erroneous data)
- Analyzed and adapted existing programs due to infrastructure changes
- SOAP and REST API for creating customer master data from SugarCRM
- REST APIs in Json (SD orders, invoices, payments, PDF forms)
- Logging program for REST APIs
- Created various invoice forms in 8 languages, including document links, email delivery, and PDF generation
- Provided data for the data warehouse
- Various user exits and enhancements in SD and FI
- Intercompany sales order creation, program for creating credit memos (uploads from Excel and the server)
- Reports (VAT, sales orders, invoices)
- Correction program for CO data
- Support for various interfaces, Notes, etc.
- Enhancement for Idoc INVOIC02
- XML file upload program (Rydoo) for posting cash receipts to FI (FB01)
- Created dunning forms in various languages (Smartforms and Adobe, including email delivery)
- Account statement program (ALV displaying postings, emailed to accounts receivable as a PDF using Smartform)
Felix S.
Last position:
Senior iOS Developer at Commerzbank AG
- The comdirect app for iOS offers an intuitive and user-friendly mobile banking app that allows users to manage their banking efficiently and securely.
- Central features: bank transfers, portfolio analysis, personalized financial manager to facilitate daily banking and financial planning.
- Users: over 1 million.
- Written in native Swift using UIKit and SwiftUI.
- App-wide MVVM and Coordinator design pattern.
- Partial reactive programming using Apple’s Combine framework or vendor RxSwift.
- API integrations and data structures with JSON.
- Documented clean code.
- Continuous integration with Git and Jenkins.
- High unit test coverage with XCTest.
- Agile project setup according to Scrum.
Christoph W.
Last position:
System Architect / System Engineer / Programmer at Deutsche Vermögensberatung (DVAG)
- Create requirements for the modularization of the promotion forecast.
- Set up and expand the various competitions for 2024.
- Customize and test the CICS dialog.
- Create various reports for the department using SQL.
- Implement and test new requirements in batch processes with IWS.
- Update documentation for the new requirements.
- Provide on-call support for daily and monthly production.
- Technologies used: SCRUM, Jira, Confluence, Windows 11, Unix, Enterprise Developer, z/OS, GIT, Mineral, Moped, IWS/TWS, JES, COBOL, CICS, DB2, SQL, Rocket, FortiClient, Citrix.
Zafer B.
Last position:
Lead Test Automation Engineer at Unknown
- Playwright-based API test automation for the Oracle JD Edwards ERP system
- Development of a TypeScript/Node.js test framework with MSSQL database integration
- End-to-end business process automation for order processing, customer management, etc.
- OpenAI integration for automatic PDF document validation
- Jira/Xray integration for automated test reporting with dashboard
- REST API client development with role-based authentication
- Test data management, dynamic ID validation, and cross-test data sharing mechanisms
Discover over 15,000 top freelancers
Statistics of experts using JSON
Aggregated from the professional profiles of matched freelancers.
Experience
29 years
Position duration
2.2 years
Positions per freelancer
17
Top business areas
Information Technology, Product Development, Business Intelligence
Top industries
Information Technology, Banking and Finance, Healthcare
Certification focus areas
Information Technology, Project Management, Business Intelligence
Bachelor's degree or higher
57%
Master's degree or higher
14%
Certifications per freelancer
3
Most common languages
German, English, French
Speak two or more languages
89%
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 JSON
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.
JSON 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%)
- Banking and Finance (67%)
- Healthcare (67%)
- Manufacturing (56%)
- Food and Beverage (44%)
- Insurance (44%)
- Professional Services (44%)
- Government and Administration (44%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Data exchange
JSON, short for JavaScript Object Notation, is a lightweight text format for structuring and exchanging data. Its readable objects, arrays, strings, numbers, booleans and null values move information between browsers, mobile apps, services and databases. JSON experts define clear structures that remain easy for people and systems to consume.
API integration
JSON is central to REST APIs and is also widely used in GraphQL responses, webhooks and event-driven services. Professionals work with request and response payloads, authentication flows, pagination, error handling and backward-compatible changes. They connect internal applications with SaaS tools, payment services, analytics systems and customer-facing products.
Schemas and tooling
Reliable JSON work goes beyond formatting. Specialists use JSON Schema to describe allowed fields, types, required values and validation rules, often alongside OpenAPI for API contracts. They inspect payloads with API clients, test transformations in automated pipelines, document interfaces and use JSON-LD when structured data must be understood by search engines or knowledge systems.
Where it runs
Companies use JSON across commerce, finance, healthcare, logistics, manufacturing and public services. Typical assignments include:
- Designing payloads for new REST APIs and webhooks
- Migrating XML or CSV integrations to JSON-based services
- Validating and normalizing data from multiple sources
- Mapping JSON between cloud applications and legacy systems
- Adding structured data with JSON-LD to digital products
When expertise matters
Freelance expertise helps when integrations fail intermittently, API contracts are unclear or different teams interpret the same payload in conflicting ways. It is also valuable during platform migrations, partner onboarding, data-quality initiatives and performance reviews. In Switzerland, remote collaboration often works well for documentation, testing and integration delivery, while on-site workshops can help teams align across business and technical languages.
Quality signals
Strong JSON professionals think about semantics, not only syntax. They create stable naming conventions, explicit validation rules, useful error responses and versioning strategies that protect consuming systems. They understand JavaScript and at least one server-side language, HTTP, authentication, databases, API testing and observability. Good specialists also explain trade-offs between JSON, XML, CSV and binary formats in terms the wider team can use.
Frequently asked questions
Key details about JSON, drawn from the questions we get asked most.
JSON is mainly used to exchange structured data between applications, web browsers, mobile clients, APIs and cloud services. It is also common for configuration files, event messages, data exports and structured web content.
JSON is usually more compact and easier to work with in modern web applications than XML, while still supporting nested structures. CSV is simpler for flat tables, but it does not naturally represent objects, arrays, relationships or validation rules.
A strong JSON specialist should understand HTTP, REST APIs, authentication, API testing and at least one programming language. Experience with JSON Schema, OpenAPI, databases, webhooks and tools such as Postman is useful for production integration work.
The right level depends on the assignment. A simple payload mapping may need focused integration experience, while an API redesign or migration calls for a professional who can define contracts, handle compatibility and improve validation across several systems.
JSON projects are often well suited to remote collaboration because payloads, schemas, tests and API documentation can be reviewed online. On-site sessions may still help when several Swiss teams need to agree on data definitions, workflows or language-specific requirements.
Ask the professional to explain how they would validate payloads, handle missing or unexpected fields and introduce breaking changes safely. Review examples of API contracts, test cases and error models rather than judging quality from readable formatting alone.
JSON Schema is valuable when multiple systems exchange data and both sides need a shared contract. It helps validate incoming payloads, document fields, catch integration errors early and keep changes visible during API evolution.
JSON is suitable for many service and integration workloads, but its text format can add size and parsing overhead. For high-throughput internal communication, a professional may compare it with a binary format while keeping JSON at external API boundaries for accessibility and interoperability.
The average hourly rate of freelancers in Switzerland who have used JSON in their recent projects is 110 €, which corresponds to a daily rate of about 880 € based on an 8-hour working day.
Of the freelancers in Switzerland who have used JSON in their recent projects, 57% hold at least a Bachelor's degree and 14% hold at least a Master's degree.
On average, freelancers in Switzerland who have used JSON in their recent projects have 29 years of professional experience, with a single engagement typically lasting around 2.2 years.
The most common languages among freelancers in Switzerland who have used JSON in their recent projects are German (100%), English (89%), and French (56%).
The most common industries among freelancers in Switzerland who have used JSON in their recent projects are Information Technology (100%), Banking and Finance (67%), and Healthcare (67%).
The most common business areas among freelancers in Switzerland who have used JSON in their recent projects are Information Technology (100%), Product Development (89%), and Business Intelligence (67%).
Main locations of FRATCH Experts, who have recently used JSON
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.
Countries:
Zurich Geneva Basel Bern Request a free demo
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FRATCH CEO
