PostgreSQL Experts in Dortmund
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Meet FRATCH Experts in Dortmund, who have recently used PostgreSQL
Nemanja Milenković
Last position:
AI Engineer / Senior Backend Engineer at Intelycx
Manufacturing intelligence platform with enterprise workflows, RAG, real-time AI assistant features, and multi-repository backend architecture.
- Built and extended production AI/backend services with Django, DRF, FastAPI, GraphQL, Celery, PostgreSQL, MySQL, Redis, and WebSockets across a modular multi-repository platform.
- Contributed to ARIS V2, a real-time manufacturing AI assistant using LangChain, LangGraph, MCP tool orchestration, planning/execution flows, OpenAI, AWS Bedrock, Qdrant, and Elasticsearch/OpenSearch-backed retrieval.
- Supported rollout expansion from ARIS V1 in 4 of 17 client production plants to ARIS V2 currently active in 13 of 17 plants, increasing real-world deployment coverage to more than 50% of the client footprint.
- Worked on document-grounded RAG functionality including ingestion, OCR, chunking, embeddings, indexing, retrieval, reranking, and grounded answer generation for industrial workflows.
Stack: Python, Django, DRF, FastAPI, LangChain, LangGraph, GraphQL, Celery, WebSockets, OpenAI, AWS Bedrock, Qdrant, Elasticsearch/OpenSearch, PostgreSQL, MySQL, Redis, Docker.
Manuel Kübler
Last position:
.NET Developer, SAP Business One Consultant at Own Projects
- DTO class generator: In-house development of a tool for the automatic generation of classes, functions, and methods for use in .NET Core projects based on SAP Business One Service Layer metadata
- E-invoice import add-on: Development of a SAP Business One add-on / coresuite module for the automated import of ZUGFeRD e-invoices as incoming invoices – with configurable mapping to flexibly control the import logic across four mapping types (DIRECT, SQL, FIXED, EXPR). The add-on is available as a licensed product for SAP Business One customers.
Stack: SAP Business One, SAP Business One Service Layer, coresuite Country Package, C#
Laurin Hagemann
Last position:
Software Architect (Freelance) at Care4Sure
- Delivered MVP-focused full-stack architecture for a health-sector client: Vite/React frontend, backend services on Google Cloud Run, and Supabase for database plus IAM/authentication.
- Supported product requirements engineering and prioritized cost-aware workload placement, implementing browser-side/edge computation where feasible before moving logic to backend services.
Diego Espinoza
Last position:
RPG Software Developer from RPG III to Free Format
- Development of software and system support for RPG development.
- Development, optimization and maintenance of programs in RPG (RPG II to ILE Free Format).
- Performing integration tasks, data management as well as applying and managing system updates.
- User support and training to ensure smooth system operation.
Patrik Garten
Last position:
Technical Lead Conversational AI at CANCOM
- Technical lead of a team developing agentic chatbot solutions (React, TypeScript, Python, FastAPI)
- Architecture design for multi-LLM dialog systems - focus on maintainability, UX, and autonomous execution
- Stakeholder alignment, CI/CD processes, and AI integration at enterprise level
Thomas Grevenkamp
Last position:
Senior .NET / Cloud Engineer at Freelance
Building an observability and alerting solution for Business Central Job Queue monitoring
- Built a central monitoring solution to track the Business Central Job Queue in a multi-organization environment in Azure DevOps
- Integrated Azure Application Insights and Log Analytics for structured collection and analysis of job runtimes and error events
- Developed KQL queries for targeted analysis of failed jobs and detection of error patterns
- Connected Grafana and Power BI to visualize operational metrics and job status in real time
- Implemented an automated alerting workflow with Power Automate – when a job fails, a notification email is sent immediately
- Ensured transparency about the state of productive background processes during live operations
Result: Full transparency over failed Business Central jobs · Clear reduction in response time through automated email alerting · Stable foundation for proactive operation of productive background processes
Technologies: Azure DevOps | Application Insights | Log Analytics | KQL | Grafana | Power Automate | Power BI | Business Central | Azure Monitor
Felix Maas
Last position:
AI Trainer at AKIA Academy for AI & Automation
- Led the 12-week training program to become an AI and automation specialist
- Created training materials & video courses on "AI Fundamentals", "Working with ChatGPT", "Prompt Engineering", "AI Agents with N8N", "Automations with Make.com" & AI-generated marketing content (images, videos, blog posts & social media posts)
- Conducted workshops on the above topics
- Tools: Loom, N8N, Make.com, ChatGPT, Midjourney, Gamma.app, Canva, Kling AI, Magnific AI
- Result: Participants learn the technical and business know-how to successfully build a business as AI and automation specialists
Christian Weinbörner
Last position:
Interim Business Analyst / Product Owner at Bundesdruckerei GmbH (via FourEnergy GmbH)
- Initial assessment of requirements based on a business value prioritization framework
- Identification of issues as well as requirement gathering and evaluation using UML, BPMN, and design thinking methods for iterative requirements analysis through interviews and workshops
- Use of user story mapping in Miro to visualize and align functional requirements (e.g. correct transmission of all application data and attachments to the specialist system) as well as non-functional requirements (e.g. complete and verifiable deletion of an applicant's data) with stakeholders
- Proactive stakeholder management of internal and external stakeholders from public authorities, business units, organizations, and companies
- Preparation of status reports to communicate project progress and upcoming tasks transparently
- Responsibility for a REST-based integration solution (middleware) for secure data exchange between core systems and external specialist applications; ensuring stability and performance in day-to-day operations
- Support for Product Owners in prioritizing backlog items and in product discovery
- Communication of planning to internal and external stakeholders as well as interim assumption of Product Owner tasks and responsibilities during a staff change
Hamza Sohail
Last position:
Software Developer at WaslSign
- Designed and implemented the system architecture for scalable document workflows, improving stability and performance.
- Optimized the login flow with TOTP-based MFA, reducing complexity and login time by 35%.
- Built secure backend APIs for document upload, signing, and management.
- Developed encrypted file handling with AWS S3 pre-signed URLs, ensuring GDPR-compliant data protection.
- Implemented JWT-based role authentication, strengthening access control and overall platform security and reducing code and database complexity.
- Optimized database queries and caching using ORM, reducing API response time by 40%.
- Integrated real-time webhook updates, enhancing workflow transparency and user experience.
Yasin Yildiz
Last position:
DevOps Architect & Backend Developer at Schweizerische National Bank
- Architecting and enhancing the DevOps infrastructure in a regulated environment
- Migration, planning, and development from a monolith to microservices (ASP.NET Core)
- Building and maintaining CI/CD pipelines (GitLab, Jenkins) to support agile development
- Managing artifact repositories with JFrog Artifactory and security scans via Xray
- Migrating and integrating source code repositories (SVN → GitLab)
- Operating and configuring a container platform with OpenShift
- Automating deployments with Ansible, Helm, and the Ansible Automation Platform
- Implementing monitoring and alerting solutions with Prometheus
- Collaborating closely with the frontend development team to optimize build, test, and release processes
- Supporting the establishment of secure and scalable infrastructure processes (Secure SDLC)
- Documenting and sharing knowledge within the team
- Leading refinements and designing the backend architecture
Rafael Kolloch
Last position:
Senior Android Developer / Team-Lead at IBM Deutschland
- Further development and release support of a white-label e-prescription component for health insurance companies
- Technologies: Android (Kotlin), Kotlin Multiplatform, Coroutines, Jetpack Compose, MVVM, StateFlow, Gradle, ProGuard
Andreas Niemann
Last position:
Freelancer at Freelance Work
Ilja Leyberman
Last position:
Software Engineer/Architect (Tech Lead) at Mercedes-Benz Tech Innovation GmbH
- Implementation of various interfaces for subsystems and connection to external devices (cameras, scanners, digital lockers)
- Development of various interfaces in the used cars area
- Realization of various prototypes
- Support in UI/UX and data analytics
- Development of frontend and backend solutions
- Kubernetes migration
- Building CI/CD pipelines
- Communication with the business unit and technical design of new solutions
- Cross-team alignment and coordination within the team
- Overview of the entire technology stack and related systems
- Documentation, preparation, and conducting of reviews
- Supporting the team and coordinating releases and key milestones
Henning Pankratius
Last position:
Siemens
- Developed a reporting API with RESTful services and Spring Boot
- LDAP integration
- Migrated services to AWS
- Bootstrap
- Frontend development with Angular 14
- JBoss
- DynamoDB
- S3
- Athena
Discover over 15,000 top freelancers
Statistics of experts using PostgreSQL
Aggregated from the professional profiles of matched freelancers.
Experience
17 years
Position duration
2.1 years (Germany: 5.1 years)
Positions per freelancer
11 (Germany: 12)
Top business areas
Information Technology, Product Development, Operations
Top industries
Information Technology, Healthcare, Education
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
83% (Germany: 91%)
Master's degree or higher
50% (Germany: 58%)
Certifications per freelancer
3 (Germany: 2)
Most common languages
German, English, Spanish
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 Dortmund 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 Dortmund 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 in practice
PostgreSQL is a relational database used for reliable data storage, reporting, and transactional systems. It fits product back ends, internal tools, analytics layers, and applications that need clean queries and strong consistency. Many teams still call it Postgres.
What specialists deliver
- Schema design and migrations
- Query tuning and execution plan review
- Backup, restore, and replication setup
- Monitoring, indexing, and capacity planning
- PostgreSQL upgrades and extension support
Where it fits
PostgreSQL is common in SaaS products, commerce systems, logistics, finance, and data-heavy platforms. It works well when teams need JSON support, geospatial data, full-text search, or dependable SQL behavior. In Dortmund, it often supports systems that must stay stable while business rules change.
Ecosystem and tools
Strong PostgreSQL professionals know the core server, psql, and common drivers for Java, Python, PHP, and Node.js. They also work with tools such as pgAdmin, pg_dump, logical replication, connection pooling, and extensions like PostGIS or pg_stat_statements. Good specialists understand how each piece affects performance and operations.
When to bring in help
Bring in freelance expertise when queries slow down, schema changes feel risky, or a migration must happen without downtime. It also helps when a team needs a cleaner data model, better backup routines, or help moving from MySQL, Oracle, or another SQL database. Remote work is often enough, but on-site time can help with workshops or critical cutovers in Dortmund.
What strong experts do well
A strong Postgres specialist reads real workloads, not just code. They check indexes, locks, vacuum behavior, and application access patterns before changing anything. They document trade-offs clearly so your team can keep the database healthy after the project ends.
Frequently asked questions
Questions about PostgreSQL? Start with the answers below.
PostgreSQL is used for transactional systems, reporting databases, internal tools, and APIs that need dependable SQL. It is a good fit when data integrity, joins, and careful schema design matter. Teams also use Postgres for JSON storage, geospatial features, and search-friendly data models.
PostgreSQL is not automatically better, but it is often chosen when teams need richer SQL features, stronger query planning, or more advanced data types. MySQL can be simpler for some web apps, while Postgres is often preferred for complex logic and analytics-friendly workloads. The right choice depends on the application, team skills, and operations model.
A strong PostgreSQL freelancer should know schema design, indexing, query tuning, backups, restores, and replication. Useful adjacent skills include SQL, Linux, one or more application languages, and tooling such as pgAdmin or psql. For many projects, experience with PostGIS, JSON, or connection pooling is also valuable.
A small setup or cleanup task may need only a specialist who knows the basics well. A migration, performance incident, or production rollout needs someone who has handled similar PostgreSQL work before. The more critical the data path, the more important proven operational experience becomes.
Yes, most PostgreSQL work can be done remotely because schema design, query review, monitoring, and backups do not require constant on-site presence. On-site time in Dortmund can still help for stakeholder workshops, change windows, or sensitive migrations. Many teams use a mix of both.
Look for clear explanations, practical trade-offs, and evidence of work on production systems. A good PostgreSQL specialist will talk about query plans, indexes, locks, vacuum, replication, and recovery, not just general database theory. Ask how they diagnosed the last serious performance issue they solved.
Postgres is often compared with MySQL, MariaDB, Oracle Database, and Microsoft SQL Server. The best choice depends on workload, licensing, team familiarity, and integration needs. If your system needs advanced SQL features or flexible data modeling, PostgreSQL is often a strong contender.
Typical deliverables include a reviewed schema, migration scripts, tuned queries, backup plans, monitoring notes, and clear handover documentation. For a production project, a PostgreSQL expert should also explain the operational risks and the rollback path. That makes later maintenance much easier for your team.
The average hourly rate of freelancers in Dortmund, Germany who have used PostgreSQL in their recent projects is 91 €, which corresponds to a daily rate of about 731 € based on an 8-hour working day.
Of the freelancers in Dortmund, Germany who have used PostgreSQL in their recent projects, 83% hold at least a Bachelor's degree and 50% hold at least a Master's degree.
On average, freelancers in Dortmund, Germany who have used PostgreSQL in their recent projects have 17 years of professional experience, with a single engagement typically lasting around 2.1 years.
The most common languages among freelancers in Dortmund, Germany who have used PostgreSQL in their recent projects are German (100%), English (100%), and Spanish (21%).
The most common industries among freelancers in Dortmund, Germany who have used PostgreSQL in their recent projects are Information Technology (100%), Healthcare (64%), and Education (50%).
The most common business areas among freelancers in Dortmund, Germany who have used PostgreSQL in their recent projects are Information Technology (100%), Product Development (93%), and Operations (57%).
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 
Dusseldorf 
Leipzig 
Essen 
Dresden 
Hanover 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
