PostgreSQL Experts in Dusseldorf
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Meet FRATCH Experts in Dusseldorf, who have recently used PostgreSQL
Alwin G.
Last position:
IT Interim Manager & AI Strategist
- AI product development: Design of an AI-supported GRC platform to automate compliance processes.
- AI expertise: Strategic deepening in Agentic AI and GenAI as a core asset for modern IT governance
- IT interim management and strategic consulting
Marijn Scholtens
Last position:
Senior Software Engineer at Puls Security GmbH
Optimizing and acceleration of our Gitlab CI pipeline
Conceptual work for the PoC of the Zero Trust system
Extension of the policy-engine backend in Go
Extension of the policy-testing mechanism in Python
Architectural design of the PEP component of Zero Trust
Documentation of the product
Technologies: Zero Trust, Go, Python, Gitlab CI, Docker, JWT, Domain-Driven Design
Boris Solos
Last position:
Generalist expert for software development at Mercor
- Training the AI models, evaluating images and texts for UI/UX, turning the provided data into insights via OpenAI Feather as part of the machine learning workflow
Technologies: OpenAI Feather
Daniel Arnan
Last position:
Sales Development Representative (SDR) at TenderFlow GmbH
- Acquires new B2B customers for an AI SaaS startup in the public tendering space and books product demos with IT decision-makers.
- Qualifies target customers based on a defined ideal customer profile, including discovery, needs analysis, and objection handling.
- Builds domain knowledge in public procurement (EVB-IT, German and EU tender portals) for technical discussions at eye level.
Sarvesh Lunia
Last position:
Data Analytics for Renewable Energy Integration at Harz University
- Created data pipelines and visualization tools to support sustainable energy decision-making
- Developed insights that could optimize renewable energy deployment and grid integration strategies
Marc Smyk
Last position:
Fullstack Developer at PLANT-MY-TREE
PLANT-MY-TREE®-per-order
The application enables Shopify merchants to automatically place tree-planting orders for every incoming order. By integrating ecological contributions directly into the purchase process, the manual effort for tracking and billing reforestation initiatives is eliminated. The system increases transparency for end customers through real-time visualizations of the ecological impact directly in the storefront. The architecture is based on a modular monolith with Spring Boot in the backend and an integrated React app inside the Shopify admin area. The solution uses webhooks to capture order data in an event-driven way and integrates the weclapp ERP system for automated monthly invoicing. An app proxy mechanism provides dynamic statistics such as CO2 compensation and planted trees without any performance loss for the merchant shop.
Tasks:
- Design of the modular software architecture based on Spring Modulith to ensure high maintainability
- Development of the event-driven business logic for evaluating Shopify orders via webhooks
- Implementation of automated invoicing by connecting the weclapp REST API
- Building the frontend using React Router and Shopify App Bridge for native integration
- Design of the database model and implementation of the persistence layer with JPA/Hibernate and Prisma
- Integration of internationalization processes for global use in the frontend and email communication
- Automation of deployment processes using Docker and GitLab CI/CD
Project skills: Java 25, Spring Boot, Spring Security, Spring Modulith, Hibernate, JPA, REST API, PostgreSQL, Maven, Liquibase, React, TypeScript, React Router, Vite, Node.js, Prisma, Zod, Docker, Docker Compose, GitLab CI/CD, Shopify CLI, Shopify App Bridge, Polaris, weclapp, i18next, Lombok, Vitest
Olaf Radicke
Last position:
DevOps Architect / Consultant at Authority with increased security requirements
- Identification of requirements (legal, organizational, and technical)
- Design of solution architectures
- Evaluation of concepts and technologies
- Preparation of decision templates
- Architectural Decision Records (ADR)
- Coordination of implementation
- Review of implementations
- Documentation
Matthias Metzlaff
Last position:
Project Manager at HSBC
- Project manager for banking projects
Stanislaus Stelle
Last position:
Security Consultant at Rohde & Schwarz AG at Star Labs GmbH
- Worked on FPGA enhanced network encryption device with secure boot, TPM2.0 and smart card integration for BSI approved usage with Post Quantum Cryptography
- Developed and audited Linux drivers
- Collaborated using GitLab, Gerrit, Confluence and Jira
- Technologies: C, C++, Secure Boot
Gernot Lang
Last position:
Founder and Managing Director at Softwerk/Ruhr GmbH
- Architecting and developing SaaS platform for graphical definition and execution of pandas data processing pipelines
- Developed POlyglott, an open-source Python CLI tool for translation workflow management featuring PO file parsing, quality linting with glossary enforcement, and DeepL API integration for machine translation
- Developed web application for material compliance management (EU REACH) using Django and modern web technologies
- Built automated infrastructure platform using Proxmox, Terraform, and Ansible — VM provisioning, configuration management, internal DNS, and fleet-wide security hardening across multiple subnets
Matthias Schneider
Last position:
AI-assisted Web Development & SaaS Founder at Self-employed
- Full focus on AI-augmented web development
- Building and running three proprietary AI-native SaaS products (BrainButler, PageUpgrade, termin365)
- Developing a self-hosted business stack for digital sovereignty
- Daily workflow with Claude as engineering partner and Anthropic/OpenAI APIs for product features
- Using RAG systems with custom vector databases and prompt engineering for complex multi-step pipelines
- Tech stack: Python/FastAPI (backend), React/TypeScript (frontend), WordPress plugin architectures (PHP), multi-tenant systems with per-user encryption
Mitali Soti
Last position:
Freelancer at Fintom8 Fintech AI UG
- Built and launched the AI-powered “E-Invoice Corrector,” an intelligent system for validating and correcting invoices, using Python, FastAPI, and machine learning. The system is now live at Fintom8.
- Converted the Corrector into a fully functional API, published with Swagger documentation for easy access and integration by internal and external consumers.
- Designed, experimented with, and optimized advanced LLM prompts and meta-prompting strategies to improve automated reasoning, error correction, and decision-making in agent workflows.
- Wrapped and integrated existing APIs within the Google Agent Development Kit (ADK) framework to enhance automation capabilities and conversational AI workflows.
- Implemented comprehensive unit testing using pytest and unittest, and employed breakpoint debugging (VS Code, pdb) to ensure code reliability, maintainability, and smooth runtime execution.
- Utilized Pydantic and Tabulate for structured data validation, API schema management, and clear tabular data representation in testing and debugging workflows.
- Pursuing the Google Cloud Professional Certificate.
Dmitry Tarantin
Last position:
Web Software Engineer at Freelancer
Third-side integration development (REST: Amazon, OpenAI, Etsy, Shopware, Prestashop, etc)
Performance optimization (Refactoring, SQL analysis)
LMS development and deployment (Moodle)
Cloud deployment automation (Amazon, Azure, Gitlab CI/CD, Docker)
Backend and Frontend development (Laravel, VueJs)
Collaboration with partner-developers (national and international)
Shirtigo GmbH
GRELLARTIG Digital GmbH
velpTEC edutainment GmbH
Jan G.
Last position:
Master Data Application at confidential
Visualization, search, and maintenance of various types of master data, providing them via a REST API, and implementing a variety of import and export formats.
Implementation, architecture, project management.
Technologies and tools: Angular (Signals, Signal Store, swagger-codegen, standalone components), Java, PostgreSQL, ActiveMQ, JavaScript, Spring Boot (Spring Core, Spring MVC, Spring Data/JPA via Hibernate, Spring Security, Spring Modulith), JUnit, Flyway, QueryDSL, GraphQL, REST API, Node, npm, Maven, SonarQube, GitLab CI/CD pipelines, Docker, Nexus, OpenAPI + Swagger UI, Keycloak, OAuth2, OpenID Connect, IntelliJ IDEA, Jira, Confluence.
Anouar Taoussi
Last position:
Fullstack Developer Java/Spring Boot at Snipes SE (Deichmann Group)
- Migration of a .NET Core loyalty program for Snipes, used by mobile cash registers in Snipes stores
- Part of the customer’s digitalization strategy in an agile, cross-functional team with a high level of ownership
- Connecting interfaces to third-party systems (e.g. Brandung, CDS)
- Quality assurance through automated tests
- Carrying out developer, unit, and integration tests
- Patterns & methods used: Clean Code, microservice architecture, agile development with SCRUM
- Technologies & tools used: Spring Boot, Java 23, Java Persistence API (JPA), Azure DevOps, Azure Key Vault, Azure PostgreSQL, Docker & Kubernetes, Git, Graylog, Grafana, JUnit, SonarQube, Jira, Confluence, Prometheus, GitLab, GitLab CI/CD, Visual Studio Code
Discover over 15,000 top freelancers
Statistics of experts using PostgreSQL
Aggregated from the professional profiles of matched freelancers.
Experience
19 years (Germany: 17 years)
Position duration
2.3 years (Germany: 5.1 years)
Positions per freelancer
12
Top business areas
Information Technology, Product Development, Operations
Top industries
Information Technology, Banking and Finance, Telecommunication
Certification focus areas
Information Technology, Business Intelligence, Product Development
Bachelor's degree or higher
83% (Germany: 91%)
Master's degree or higher
67% (Germany: 58%)
Doctorate
11% (Germany: 7%)
Certifications per freelancer
8 (Germany: 2)
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 97%)
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 Dusseldorf 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 Dusseldorf 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
PostgreSQL use
PostgreSQL is an open-source relational database used for transactional systems, reporting, APIs, and data-heavy products. It is valued for strong SQL support, reliable consistency, and flexible modeling. Teams choose it when they need a database that can handle everyday app work and more complex queries without losing control.
What experts deliver
- Schema design for new applications and product rebuilds
- Query tuning for slow reads, writes, and joins
- Migration from MySQL, Oracle, SQL Server, or older PostgreSQL setups
- Backup, restore, replication, and high-availability planning
- Extensions and features like PostGIS, JSONB, and full-text search
Ecosystem and tools
Strong PostgreSQL specialists work with psql, pgAdmin, performance views, and migration tools. They understand indexes, constraints, transactions, roles, and permissions. They also know when to use built-in features instead of adding extra software. For companies in Dusseldorf with ERP, logistics, finance, or e-commerce systems, that practical judgment matters.
When freelancers help
Companies bring in freelance PostgreSQL experts when a database is getting slow, a release needs a safer migration, or a new service needs a clean data model. Short projects often include audit work, recovery after an incident, or help with cloud-managed PostgreSQL. Remote collaboration works well, while on-site support can help during cutovers, workshops, or handover sessions.
Strong specialist traits
Good PostgreSQL professionals do more than write SQL. They read execution plans, spot missing indexes, and understand how application code affects the database. They document changes clearly, protect data during maintenance, and balance performance with maintainability. They should also explain trade-offs in plain language to product and engineering teams.
Common project shapes
PostgreSQL work often appears in product launches, platform migrations, analytics foundations, and internal tools. A specialist may create a new schema, fix locking issues, set up replicas, or improve reporting queries. For Dusseldorf-based teams, clear communication in English is often enough, and German helps when the project includes local stakeholders or shared operations.
Frequently asked questions
Curious about PostgreSQL? Here are the answers that come up again and again.
PostgreSQL is used for transactional applications, reporting databases, APIs, and systems that need strong data integrity. Teams also use it for spatial data, JSON-heavy workloads, and search within a relational model. It fits products that need structure but still want flexibility.
PostgreSQL is often chosen when teams want more advanced SQL features, richer data types, and strong consistency options. MySQL can be simpler for basic web workloads, while SQL Server is common in Microsoft-heavy stacks. The right choice depends on the system, the team, and the existing infrastructure.
A strong PostgreSQL specialist usually understands SQL, data modeling, indexing, backup and restore, and performance analysis. Cloud knowledge helps too, especially with managed database services, replication, and failover setups. Experience with application stacks is useful because many issues start outside the database.
A small reporting fix may only need someone who knows SQL and query tuning well. A migration, high-availability setup, or production incident usually needs deeper PostgreSQL expertise and careful change control. The more business-critical the database, the more important proven hands-on work becomes.
Bring in PostgreSQL help when queries slow down, a schema change feels risky, or a migration must be done with minimal downtime. It is also smart to involve a specialist before scale, not after an outage. Early review often saves time later.
Most PostgreSQL work can be done remotely because schema review, query analysis, and migration planning do not need a desk in the office. On-site time is useful for production cutovers, stakeholder workshops, or incident response. Many teams in Dusseldorf use a mix of both.
Look for clear explanations, clean change plans, and evidence of solving real production issues with PostgreSQL. Good specialists talk about indexes, locks, backups, recovery, and rollback paths, not just about writing SQL. They should also document decisions so your team can maintain the system later.
People often mention PostgreSQL, PostgreSQL, or simply Postgres when they mean the same database. Useful features to ask about include JSONB, replication, partitions, extensions, and full-text search. A good specialist can explain which ones fit your project and which ones you can skip.
The average hourly rate of freelancers in Dusseldorf, Germany who have used PostgreSQL in their recent projects is 91 €, which corresponds to a daily rate of about 724 € based on an 8-hour working day.
Of the freelancers in Dusseldorf, Germany who have used PostgreSQL in their recent projects, 83% hold at least a Bachelor's degree, 67% hold at least a Master's degree, and 11% hold a doctorate.
On average, freelancers in Dusseldorf, Germany who have used PostgreSQL in their recent projects have 19 years of professional experience, with a single engagement typically lasting around 2.3 years.
The most common languages among freelancers in Dusseldorf, Germany who have used PostgreSQL in their recent projects are German (100%), English (100%), and French (21%).
The most common industries among freelancers in Dusseldorf, Germany who have used PostgreSQL in their recent projects are Information Technology (92%), Banking and Finance (50%), and Telecommunication (50%).
The most common business areas among freelancers in Dusseldorf, Germany who have used PostgreSQL in their recent projects are Information Technology (96%), Product Development (88%), and Operations (58%).
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.
Berlin 
Hamburg 
Munich 
Cologne 
Frankfurt 
Stuttgart 
Leipzig 
Dortmund 
Essen 
Dresden 
Hanover 
Nuremberg Request a free demo
Get in touch with the FRATCH team and we will get back to you within 4 hours.
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We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
