JSON Experts in Switzerland
for reliable APIs and data exchange, matched in minutes with vetted freelancersHire experts who design clear data contracts, validate payloads with JSON Schema, and connect REST APIs across business systems. FRATCH matches you quickly and precisely with vetted, available freelancers who fit your project.
Meet FRATCH Experts in Switzerland, who have recently used JSON
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)
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
Sibylle H.
Last position:
SAP ABAP-OO Development (cross-module) at Asendia
- Creation of interfaces for transferring SD orders and customer master data (including various protocols and the ability to handle erroneous data)
- Analysis and adjustment of existing programs due to infrastructure change
- SOAP and REST API for creating customer master data from SugarCRM
- REST APIs in JSON (SD orders, invoices, payments, PDF forms)
- Log program for REST APIs
- Creation of various invoice forms in 8 languages including document links, email delivery, PDF generation
- Provision of 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 from the server)
- Reports (VAT, sales orders, invoices)
- Correction program for CO data
- Support for various interfaces, notes, etc.
- Enhancement for IDoc INVOIC02
- Upload program for XML files (Rydoo) to post cash receipts into FI (FB01)
- Creation of dunning forms in various languages (Smartforms and Adobe including email delivery)
- Account statement program (ALV displaying postings, sending to debtors via email using Smartform as PDF)
Discover over 15,000 top freelancers
Statistics of experts using JSON
Aggregated from the professional profiles of matched freelancers.
Experience
30 years
Position duration
2.3 years
Positions per freelancer
17
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Healthcare
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
50%
Master's degree or higher
17%
Certifications per freelancer
4
Most common languages
German, English, French
Speak two or more languages
88%
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 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 19 Sep 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 (63%)
- Healthcare (63%)
- Manufacturing (63%)
- Insurance (50%)
- Government and Administration (50%)
- Energy (38%)
- Food and Beverage (38%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What JSON does
JSON, short for JavaScript Object Notation, is a lightweight text format for representing structured data. Its objects and arrays are easy for software to parse and easy for people to read. Companies use it to exchange records between browsers, applications, services and external partners.
Where it fits
JSON is a core format for REST APIs, event payloads, configuration files and document-oriented data stores. It carries customer records, product data, identity claims, order details and operational messages between systems. It is common in web, mobile, cloud and integration projects across Swiss industries.
Ecosystem and tooling
Strong JSON professionals work beyond basic syntax and understand the surrounding standards and tools:
- Define reusable contracts with JSON Schema
- Document endpoints with OpenAPI
- Query nested data with JSONPath
- Transform payloads between JSON, XML and CSV
- Inspect requests with API clients and command-line tools
When expertise matters
Companies bring in freelance expertise when inconsistent payloads begin causing failed integrations, unclear ownership or fragile releases. A specialist can establish naming rules, validation, versioning and error handling before these issues spread across services. This is especially useful during API launches, migrations and partner integrations.
What professionals deliver
Typical deliverables include API payload models, JSON Schema definitions, OpenAPI documentation, transformation logic, validation tests and migration plans. Experienced professionals also review security-sensitive fields, handling of null values, encoding, dates and decimal data. They connect format decisions to the systems that produce and consume the data.
Signs of strong expertise
Look for people who can explain why a structure is stable, not only whether it parses. Strong professionals test valid and invalid payloads, consider backward compatibility and trace data across service boundaries. For a Swiss project, clear remote collaboration, precise documentation and comfort working with local teams and language expectations can matter as much as syntax knowledge.
Frequently asked questions
Key details about JSON, drawn from the questions we get asked most.
JSON is mainly used to exchange structured data between web applications, APIs, services and external systems. It also appears in configuration files, event messages and document databases.
JSON is usually more compact and maps naturally to objects and arrays used in many programming languages. XML offers richer document features and mature tooling for some enterprise integrations, so the right choice depends on contracts, existing systems and validation needs.
A strong JSON specialist often works with REST APIs, HTTP, OpenAPI, JSON Schema and JSONPath. Knowledge of authentication, data transformation, automated testing and databases helps them solve integration issues rather than only format payloads.
The JSON format itself is simple, but production work can involve complex contracts, compatibility rules and distributed systems. A smaller integration may need focused support, while a broad API or migration benefits from a professional who has handled versioning, validation and failure cases.
JSON work is well suited to remote collaboration because schemas, API documentation, examples and test payloads can be reviewed asynchronously. For teams in Switzerland, agree early on communication language, meeting rhythm, access controls and how interface decisions will be recorded.
Review whether the JSON structures are consistent, validated and documented for the people who consume them. Ask for examples of edge-case testing, backward-compatible changes, clear error responses and decisions about dates, nulls, arrays and sensitive data.
JSON Schema is not mandatory for every small API, but it provides a clear way to describe and validate JSON data. It becomes particularly valuable when several teams or partners share payloads, when contracts change often, or when automated validation is important.
A capable JSON professional should leave behind agreed payload examples, schemas or interface documentation, validation tests and notes on versioning. The deliverables should make future changes predictable and help another team understand how data moves through the system.
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, 50% hold at least a Bachelor's degree and 17% hold at least a Master's degree.
On average, freelancers in Switzerland who have used JSON in their recent projects have 30 years of professional experience, with a single engagement typically lasting around 2.3 years.
The most common languages among freelancers in Switzerland who have used JSON in their recent projects are German (100%), English (88%), and French (50%).
The most common industries among freelancers in Switzerland who have used JSON in their recent projects are Information Technology (100%), Banking and Finance (63%), and Healthcare (63%).
The most common business areas among freelancers in Switzerland who have used JSON in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (75%).
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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Philipp Thomaschewski
FRATCH CEO
