PostgreSQL Experts in Essen
for reliable data systems, matched in minutes with vetted professionalsHire experts who design resilient PostgreSQL databases, tune complex SQL queries, and connect data services through reliable APIs. FRATCH matches you quickly and precisely with vetted, available freelancers who fit your technical needs.
Meet FRATCH Experts in Essen, who have recently used PostgreSQL
Alwin G.
Last position:
IT Interim Manager & AI Strategist
- Founder of CheironX: AI-supported GRC management (ISO 27001, BSI IT-Grundschutz, TISAX, DORA)
- Strategic focus on Agentic AI and GenAI for modern IT Governance, Risk & Compliance Management
- IT interim management and strategic consulting
Fadi S.
Last position:
Data Scientist at E-Commerce
- Designed and developed a production-ready data platform based on Microsoft Fabric for an e-commerce company
- Built a scalable Medallion Architecture (Bronze, Silver, Gold) with Lakehouse and Delta Lake as the foundation for analytics and AI applications
- Developed a metadata-driven ETL platform with PySpark and a generic Incremental Loading Framework (SQL Server → Bronze → Silver → Gold)
- Developed reusable components for Microsoft Fabric Notebooks to standardize data integration, transformation, and validation
- Implemented automated data pipelines including monitoring, logging, error handling, and Delta MERGE strategies for stable production operations
- Built a business layer architecture for reporting, data warehousing, and reusable data products
- Integrated heterogeneous data sources via SQL Server, REST APIs, Amazon SP API, and Google Analytics 4
- Worked closely with business departments to analyze business requirements and translate them into scalable data architectures
Technologies: Microsoft Fabric, PySpark, Python, SQL Server, Delta Lake, Lakehouse, OneLake, Data Factory, Data Warehouse, REST APIs, Amazon SP-API, Google Analytics 4
Sarvesh L.
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
Asım Y.
Last position:
Freelance BI/DWH/ETL Specialist at Akbank
- Setting architectural standards for Informatica Power Center development teams
- Maintenance-performance-health for DWH (Exadata) environments
- Qlik Sense / BO reports architectural standards
- Implementing best practices in ETL tasks
- Documentation ETL standards on Confluence
- Dynamic Data Masking rules for GDPR/KVKK regulations by using Informatica DDM tool
- DWH Data model Power Designer
- Upgrade Qlik Sense versions
- Merge all Informatica server's repository databases on one Oracle DB
Timo T.
Last position:
Gronic Ident & Sign at Gronic Systems GmbH
Gronic Ident & Sign
Core technologies: Android, Jetpack Compose, Retrofit, Regula Document Reader, Adobe Sign
Android app on dedicated devices for identifications and electronic signatures at the PoS
Boris S.
Last position:
Generalist expert for software development at Mercor
- Training AI models, evaluating images and text UI/UX, turning the provided data into insights through OpenAI Feather as part of the machine learning workflow
Technologies: OpenAI Feather
Daniel A.
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 procurement portals) for conversations on equal footing.
Laurin H.
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.
Saruna M.
Last position:
Master's Thesis at Heinrich Heine Universität
- Title: Enhancing Syntactic Awareness in Transformer Language Models for Hindi Dependency Parsing
- Investigated syntactic knowledge captured by transformer language models (RoBERTa, XLM-RoBERTa) for Hindi dependency parsing, a morphologically rich and low-resource language.
- Developed structure-aware model variants (Struct_Roberta_hi, Struct_XLMR) by integrating a CNN-based parser network between transformer layers, inspired by the StructFormer architecture.
- Conducted extensive error analysis including label-wise, distance-based, direction-based, sentence length-based, and LVC/Non-LVC evaluations.
- Evaluated models on downstream NLP tasks (NER, POS tagging) using the IndicXTREME benchmark.
Dennis G.
Last position:
AI & Automation Consultant at Flow10x
- AI consulting for HR & recruiting (identification and implementation of AI potential throughout the candidate journey)
- Development and implementation of AI-supported recruiting systems
- Building automations to optimize hiring processes (screening, communication, follow-ups)
- Design and integration of chatbots & AI assistants for candidate communication
- Analysis and optimization of existing HR processes with a focus on efficiency, time-to-hire & candidate experience
- Development of custom software solutions for recruiting workflows
- Integration of AI systems into existing HR tools & infrastructures
- Focus on scalability, automation, and measurable impact
- Advising companies on digital transformation in HR
Anupriya P.
Last position:
Senior Software Engineer at Telefonica Germany
(Maternity/Parental Leave: July 2023 – Aug 2024)
- Domain: Payment Domain | Client: Telefonica Germany
- Project: General Payment Service
The General Payment Service is responsible for processing of online payments via external payment service provider like Safer pay and PayPal
- Developed Design of Use (DOU) and interface contract documentation, ensuring clarity and compliance across system integrations
- Designed and delivered REST/SOAP web services with Spring Boot and Spring Data JPA, publishing Swagger contracts through WSO2 API Gateway to improve accessibility and governance.
- Spearheaded the on-premises to AWS Cloud migration, re-platforming from Oracle to PostgreSQL on AWS RDS and deploying services on EC2, improving scalability and cost efficiency.
- Containerized microservices using Docker and orchestrated deployments with Kubernetes, streamlining deployment pipelines and improving system reliability.
- Implemented proactive monitoring and logging via AWS CloudWatch and Kibana, ensuring stability and performance during cutover.
- Enhanced collaboration through code reviews and peer reviews, promoting maintainability and clean coding standards.
- Strengthened quality by writing comprehensive JUnit tests and preparing detailed test cases enabling early defect detection
- Delivered automated API testing with Ready API, Postman, and SOAPUI, and conducted performance testing with JMeter, ensuring reliability in high-transaction environments.
Celil U.
Last position:
ZÜRS Geo 2021 at adesso SE
- Frontend development
- Spring Boot
- Swagger
- Git
- GitLab
- SonarQube
- Docker
- Maven
- Java
- Angular
Nils S.
Last position:
Backend System and Web Client for Replacing Electricity Meters for Energy Suppliers at Freelance
Design and implementation of a system for controlling the complete process of installing, removing, and replacing electricity meters by external service providers for an energy supplier
Automated retrieval of orders and available devices through defined interfaces (e.g. from SAP)
Orchestration of the process steps (assignment of meters, processing of meter data, transfer of updated information back to the source system) through a Spring-Boot backend
Provision of a React-based web client for operational tracking and control of orders, e.g. to continue failed process steps or resend notifications
Adem S.
Last position:
IT Consultant (Test Manager) & CEO at Trikolon Consulting GmbH
- Development and implementation of test concepts for complex, multi-layered systems
- Creation of regular management reports and presentations for stakeholders and clients
- Technical and disciplinary leadership of international test teams (coordination, coaching, resource planning)
- Responsibility for quality assurance across multiple test levels (unit, integration, system, and acceptance tests)
- Design of test cases and test plans in Azure DevOps; ensuring traceability and coverage
- Use of BDD approaches (Gherkin/Cucumber) to prepare test automation
- Building a test automation architecture with Playwright and integrating new tests into CI/CD pipelines
- Performing API tests (REST) and tests for mobile/PWA applications
- Setup and maintenance of test environments across multiple stages (integration, QA, UAT, pre-production)
- Test data management (synthetic and production-like data), ensuring consistency and reproducibility
- Collaboration with DevOps teams for containerization (Docker/OpenShift) and CI/CD integration
- Working under SAFe & Scrum, closely coordinating with product owners and DevOps teams
- Active participation in PI plannings, sprint reviews, and retrospectives
- Promoting an agile QA culture through coaching and knowledge sharing
- Introducing scalable test automation with Playwright → significant reduction of manual testing efforts
- Increasing test transparency through clean defect and reporting management in Azure DevOps
- Improved release quality through an end-to-end QA strategy and automated regression tests
- Strategic leadership of Trikolon Consulting GmbH and responsibility for finance, personnel, and business development
Felix M.
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
Discover over 15,000 top freelancers
Statistics of experts using PostgreSQL
Aggregated from the professional profiles of matched freelancers.
Experience
15 years (Germany: 17 years)
Position duration
1.9 years (Germany: 5.1 years)
Positions per freelancer
11 (Germany: 12)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Banking and Finance, Professional Services
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
95% (Germany: 91%)
Master's degree or higher
79% (Germany: 59%)
Certifications per freelancer
4 (Germany: 2)
Most common languages
German, English, Spanish
Speak two or more languages
100% (Germany: 97%)
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 Essen 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.
Discover detailed PostgreSQL rate benchmarks:
Explore rate insightsAverage rates of experts in Essen 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 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
PostgreSQL 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 (95%)
- Banking and Finance (59%)
- Professional Services (45%)
- Education (41%)
- Healthcare (41%)
- Energy (32%)
- Government and Administration (32%)
- Automotive (27%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Relational foundation
PostgreSQL is an open-source object-relational database system built for dependable storage, complex queries, and transactional workloads. It supports SQL while adding rich data types, constraints, extensions, full-text search, and strong consistency. Companies use it behind web applications, business systems, analytics services, and data-heavy products.
Ecosystem and tooling
PostgreSQL fits into a broad ecosystem of application frameworks, cloud services, migration tools, and observability solutions. Strong specialists work with SQL, indexing, query plans, replication, backups, connection pooling, and access control. They may also use PostGIS for spatial data, JSONB for flexible records, and tools such as pgAdmin, psql, Flyway, or Liquibase.
Practical workloads
Teams bring in PostgreSQL expertise for systems where correctness, maintainability, and predictable performance matter:
- Design schemas for transactional applications and shared business data
- Migrate from MySQL, MariaDB, proprietary databases, or legacy systems
- Build reporting, search, and analytics queries over large datasets
- Add PostGIS, JSONB, full-text search, or custom extensions
- Connect database services with APIs, queues, and application frameworks
When expertise matters
Freelance specialists are useful when a database has become a bottleneck, a migration carries operational risk, or an application needs a sound data model before launch. They can review schema decisions, identify inefficient queries, establish backup and recovery procedures, and document standards for the internal team. In Essen, they may support local industrial, logistics, retail, and service businesses while collaborating on-site or remotely.
Reliable database practice
Quality PostgreSQL work goes beyond writing SQL. Strong professionals explain trade-offs, use execution plans to validate tuning decisions, protect sensitive data through roles and least-privilege access, and test recovery rather than assuming backups are enough. They also understand how application code, infrastructure, connection limits, and deployment workflows affect database reliability.
Choosing the right specialist
Look for a professional who can show how they approached a comparable workload, not just list PostgreSQL on a profile. Ask about schema design, indexing strategy, migrations, monitoring, replication, and incident response. Clear communication matters when a remote specialist works with an Essen-based team, especially when requirements, documentation, and collaboration need to be handled in English or German.
Frequently asked questions
Questions about PostgreSQL? Start with the answers below.
PostgreSQL is used to store and manage structured business data for websites, SaaS products, internal applications, financial workflows, analytics, and location-aware systems. It is a strong fit when transactions, data integrity, complex relationships, or extensibility are important.
PostgreSQL and MySQL or MariaDB can all support common web applications, but they differ in SQL behavior, extensibility, tooling, and operational preferences. PostgreSQL is often chosen for complex queries, advanced data types, strict integrity rules, and workloads that benefit from standards-focused features.
A strong PostgreSQL specialist should understand SQL, data modeling, Linux or cloud infrastructure, backup and recovery, monitoring, and application connectivity. Experience with APIs, containers, infrastructure automation, and frameworks such as Django, Rails, or Spring can also improve project delivery.
The right level depends on the risk and complexity of the database work. PostgreSQL schema reviews, query tuning, or migrations may need a focused specialist, while a high-availability platform or sensitive production system calls for deeper operational and recovery expertise.
Yes. PostgreSQL work is well suited to remote collaboration when access, deployment, documentation, and incident procedures are defined clearly. An Essen-based company may combine remote delivery with occasional on-site workshops, and it should agree early on language, working hours, and escalation paths.
Ask how the specialist validates schema choices, query performance, migrations, permissions, backups, and recovery. Good PostgreSQL work is measurable through clear documentation, repeatable tests, useful monitoring, and explanations that connect technical decisions to business risk.
Bring in a PostgreSQL freelancer when a migration is blocked, queries are slowing key workflows, data models are changing quickly, or the team lacks production database expertise. A specialist can also provide an independent review before launch or help establish operational practices.
PostgreSQL can handle both through features such as JSONB and the PostGIS extension. This allows teams to keep relational integrity while supporting flexible records, location queries, full-text search, and other data patterns that may otherwise require separate systems.
The average hourly rate of freelancers in Essen, Germany who have used PostgreSQL in their recent projects is 83 €, which corresponds to a daily rate of about 667 € based on an 8-hour working day.
Of the freelancers in Essen, Germany who have used PostgreSQL in their recent projects, 95% hold at least a Bachelor's degree and 79% hold at least a Master's degree.
On average, freelancers in Essen, Germany who have used PostgreSQL in their recent projects have 15 years of professional experience, with a single engagement typically lasting around 1.9 years.
The most common languages among freelancers in Essen, Germany who have used PostgreSQL in their recent projects are German (100%), English (100%), and Spanish (14%).
The most common industries among freelancers in Essen, Germany who have used PostgreSQL in their recent projects are Information Technology (95%), Banking and Finance (59%), and Professional Services (45%).
The most common business areas among freelancers in Essen, Germany who have used PostgreSQL in their recent projects are Information Technology (95%), Product Development (95%), and Project Management (55%).
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.
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FRATCH CEO
