PostgreSQL Experts in Zurich
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Meet FRATCH Experts in Zurich, who have recently used PostgreSQL
Gwang Jin Kim
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
Christoph Pardon
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 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% through CI/CD pipeline optimization and the introduction of 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
Robin Ochsner
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
Ahmed Rehman
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.
Claus Nielsen
Last position:
Oracle Database Engineer at BBV.ch
- Migration of databases from ODA to ExaData
- Migration of databases from ExaData to ExaCC/OCI
- Decreased UCC usage by 10%
- Developing automation scripts using Python
- Performance tuning
- Shrunk development databases from 6 TB to 3 TB using Exadata columnar compression
- Tuned application performance by 30% using inmemory option
- Tuned non-production Exadata by 20% to release CPU resources before ExaCC migration
- Database patching of Oracle 19c
- Basic Ansible scripting for deployments and database cloning
- Developing acconting model for shared Oracle platform
- Migrating single-instance databases to Oracle RAC
- Analysis of RAC issues
- Advising development teams of how to migrate to RAC
Matthias Isler
Last position:
Fractional CTO (Principal Engineer / Technical Architect)
- Designed large-scale systems and APIs serving thousands of concurrent users.
- Refactored a 650k-LOC monolith and led full AWS migration for stable performance.
- Introduced SLO-based observability, improving reliability and recovery flow.
- Optimised cloud and databases, achieving significant cost and latency reduction.
- Delivered LLM, RAG, and document-automation pipelines adopted in production.
Csaba Kéri
Last position:
ServiceNow Consultant at DXC
- Worked in mixed teams with several clients
- Performed requirement engineering, proposal and time estimation
- Developed ACLs, business rules, flows, workflows, catalog items, various scripts, UI actions, policies, scoped applications
- Customized mobile apps: Now Agent and Now Mobile
- Implemented integrations using the Integration Hub
- Coordinated continuously with clients during development
- Performed testing and helped clients with testing
- Deployed to production and applied main version upgrades and patches
- Managed CMDB, domain separation and asset management
- Integrated between instances at different clients
- Developed GlideScript: business rules, scripted REST endpoints, extension points, fix scripts, background scripts
Ala Lutz
Last position:
VR/AR/ML Project Site Lead (contract by Experis) at Meta
- Acted as project lead in different internal projects, including the development and implementation of innovative solutions based on machine learning, virtual and augmented reality with the aim of providing great user experience
- Drove project planning, execution and reporting, designed risk mitigation and schedule adjustment plans to bring the projects on the green path
- Directed the process optimization and conducted project reviews by being the liaison between engineering teams and executive stakeholders
- Served as agile coach and led the scrum ceremonies such as daily stand-ups, sprint planning, sprint review and sprint retrospective
Ioannis Kaliakatsos
Last position:
Algorithms Development Expert, Research & Development at Reishauer AG
- Mathematical specification and definition, analysis and software development of the skiving cutter tool motion planning within the skiving machine for simultaneous and sequential gear flank processing
- Twist-free topological manufacturing
- Workpiece flank line modifications
- Workpiece flank line and profile corrections
- Workpiece tooth thickness deviations
- Computer vision algorithms for automatic wear detection of the skiving cutter tool
- Software development for corrections of the machine kinematics for the profile grinding product series, including twist-free grinding
- Software development for corrections of the machine kinematics, quality measurement and evaluation for the slot grinding product series
- Performance analysis and continuous improvement of internal design tools (RTDesign)
- Tools used: C#, .NET, TeamCity, git, PostgreSQL, MySQL
Nenad Tomasic
Last position:
Contractor at Swisscom
- SAP Data Designer ETL, SQL Server, Docker for PharmaSuisse Data Warehouse Application (Application Manager and Developer)
- SAP Business Objects, ABAP on SAP HANA for the Police of the Canton of Bern (Application Manager and Developer)
- Avaloq Connectors to SAP BW for Banque Cantonale de Fribourg
Milica Maričić
Last position:
Full-Stack Developer at Holycode
- Contribute to a cross-functional team building a cloud-based bookkeeping platform for SMEs
- Design and implement Java Spring Boot microservices with clear separation of concerns
- Integrate core services via REST and gRPC APIs
- Implement event-driven workflows using RabbitMQ for reliable, decoupled messaging
- Model and manage transactional data in PostgreSQL and leverage Redis for caching
Mateusz Lipczyński
Last position:
Project Lead Developer at PwC
- Took over the analyst and leading developer role in an innovative project helping detection of financial fraud in a major financial institution in Zurich with assistance of artificial intelligence
- Analyzed and implemented new modules, improved performance and user experience, elevated technical documentation and code quality to the standard required by the end client
- Technologies: Java 17, JavaFX, Spring Boot, concurrency, UX, Gradle, Impala
Discover over 15,000 top freelancers
Statistics of experts using PostgreSQL
Aggregated from the professional profiles of matched freelancers.
Experience
23 years
Position duration
2.3 years
Positions per freelancer
12
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Banking and Finance, Healthcare
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
100%
Master's degree or higher
90%
Doctorate
10%
Certifications per freelancer
5
Most common languages
English, German, French
Speak two or more languages
100%
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 Zurich 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 Zurich using PostgreSQL
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
Core database work
PostgreSQL is a relational database for apps that need strong consistency, flexible SQL, and solid data modeling. Teams use it for product back ends, reporting stores, and systems that must keep transactions correct under load.
What specialists deliver
- Schema design for new products and feature growth
- Query tuning for slow reports and busy APIs
- Migrations from MySQL, SQL Server, Oracle, or older PostgreSQL setups
- Backup, restore, and replication setups for safer operations
Ecosystem and tooling
Strong specialists work with PostgreSQL extensions, psql, pg_dump, EXPLAIN, and monitoring tools. They also know indexes, partitioning, connection pooling, and how application code should use transactions, locks, and prepared statements.
When companies bring in help
Teams usually seek freelance PostgreSQL expertise when a database becomes a bottleneck, a migration is risky, or a release needs careful data changes. In Zurich, this often fits fintech, SaaS, analytics, and regulated environments that need clear documentation and clean handovers.
What good experts know
A strong professional reads query plans, spots missing indexes, and keeps data safe during change. They balance performance with maintainability, avoid overengineering, and can explain tradeoffs in plain language to product and engineering teams.
Signs it is time
If backups are untested, queries keep slowing down, or schema changes feel fragile, it is time to bring in help. The same applies when you need partitioning, high availability, or a controlled move to PostgreSQL 15, PostgreSQL 16, or another current release.
Frequently asked questions
Everything clients usually want to know about PostgreSQL, in one place.
PostgreSQL is used for transactional systems, reporting databases, content platforms, and products that need reliable SQL and strong data integrity. It fits anything from a customer-facing app to internal tooling when you need structured data, joins, and safe updates.
PostgreSQL is often chosen when teams want richer SQL features, stronger extensibility, and more control over data modeling. MySQL is common for simpler web apps, while SQL Server is often tied to Microsoft-heavy stacks and licensing decisions.
A strong PostgreSQL specialist should know indexing, query planning, transactions, migrations, and backup and restore routines. It also helps if they understand application-side access patterns, connection pooling, and how ORMs affect database load.
A small schema cleanup may only need a focused PostgreSQL expert for a short engagement, while a migration or high-availability setup needs deeper operational skill. The right level depends on whether the task is routine maintenance, performance work, or a structural change to the database.
Yes. PostgreSQL work is often well suited to remote collaboration because many tasks can be reviewed through schema files, migration scripts, and query plans. For systems with sensitive data or production cutovers in Zurich, teams may still want some on-site coordination for critical phases.
If PostgreSQL queries are getting slower, deployments are risky, or backups have not been tested properly, outside help is usually worth it. Other signs are unclear ownership, repeated data issues, and schema changes that keep breaking application code.
Look for clear explanations, practical tradeoffs, and evidence that the PostgreSQL specialist can read execution plans and design for real workloads. Good work also leaves behind documentation, repeatable scripts, and a database that is easier to operate after the engagement.
Yes, PostgreSQL can support both product databases and smaller analytics workloads when the data model and queries are designed well. For heavier analytics, specialists often add partitioning, materialized views, or careful indexing to keep the system responsive.
The average hourly rate of freelancers in Zurich, Switzerland who have used PostgreSQL in their recent projects is 112 €, which corresponds to a daily rate of about 900 € based on an 8-hour working day.
Of the freelancers in Zurich, Switzerland who have used PostgreSQL in their recent projects, 100% hold at least a Bachelor's degree, 90% hold at least a Master's degree, and 10% hold a doctorate.
On average, freelancers in Zurich, Switzerland who have used PostgreSQL in their recent projects have 23 years of professional experience, with a single engagement typically lasting around 2.3 years.
The most common languages among freelancers in Zurich, Switzerland who have used PostgreSQL in their recent projects are English (100%), German (92%), and French (42%).
The most common industries among freelancers in Zurich, Switzerland who have used PostgreSQL in their recent projects are Information Technology (92%), Banking and Finance (83%), and Healthcare (50%).
The most common business areas among freelancers in Zurich, Switzerland who have used PostgreSQL in their recent projects are Information Technology (100%), Product Development (92%), and Project Management (67%).
Main locations of FRATCH Experts, who have recently used PostgreSQL
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
