Data Quality Experts in Hamburg
in minutes from over 15,000 CVs with the power of AI.Hire experts who improve data profiling, validation rules, deduplication, lineage checks, and data stewardship across your key systems. They keep reporting trustworthy, reduce manual cleanup, and help teams ship with cleaner data. Fast, precise matching with vetted, available freelancers.
Meet FRATCH Experts in Hamburg, who have recently used Data Quality
Christian Frauer
Last position:
Department Head (Interim) at Municipal utilities and transport company
- Definition and setup of the subject areas
- Building a governance model for the department with the areas of responsibility
- IT strategy, project management, process management, and quality and sustainability management
- Developing a communication strategy within the group
- Creating the IT strategy
- Designing templates, guidelines, and processes for consistent work
- Capturing strategic guardrails and grouping ongoing projects – deriving a roadmap for strategic planning
- Reviewing ongoing projects
- Creating staffing calculations and volume structure
- Defining job profiles
Manfred Böttcher
Last position:
Interim Manager Managing Director
- Optimization of business results and expansion of sales activities
- Responsible for personnel organization
- Introduction of a document management system (DMS)
- Introduction and optimization of the ERP, CMS and CRM landscape
- Introduction of digital signatures
- Increase in revenue, reduction in costs and increase in EBIT
Oliver Voss
Last position:
Interim Manager and Business Consultant at Self-employed
- Development of an entry strategy for the claims area of an insurance service provider.
- Analysis and optimization of existing claims processes.
- Definition of management metrics and KPIs to improve performance and efficiency.
- Advising management on market positioning and process digitalization.
- Leading an IT team with 13 employees in a temporary vacancy role.
- Ensuring stable IT operations and managing external IT service providers.
- Leading regulatory projects, especially for the implementation of the DORA regulation.
- Preparation for and support during an IT security audit.
- Change management and conflict moderation in a challenging transformation environment (FI migration).
Vinod Goyal
Last position:
Freelancer: SAP MDG Consultant at Logistics service provider
- Support for one of the largest logistics service providers in handling ServiceNow tickets in the areas of SAP MDG, Business Partner (BP), customer and supplier master data
- Technical analysis and resolution of tickets through in-depth review of various database tables
- Creation and maintenance of accounting clerks in the system
- Deactivation of company codes using transports
- Carrying out mass changes with LSMW (Legacy System Migration Workbench)
Heena Patel
Last position:
Retirement Spend & Tax Optimizer Agentic AI App (Vibe Coding) at Personal Project
Self-directed exploration of agentic AI development methods, taken from idea to a working, publicly usable application
- Built an interactive planning tool for modelling retirement withdrawals and tax strategy using an agentic AI (vibe coding) development approach – demonstrating self-directed investigation of new AI-assisted development methods
- Delivered live, tax-aware spending projections and adjustable user inputs; shipped as a free, install-free browser application built in Python, with attention to usability for non-technical users
Jenny Lam
Last position:
Product Manager – Data & Sustainability at shipzero GmbH
Designed and implemented an initial product management framework
Created a process for prioritizing the product roadmap with internal stakeholders, considering business impact, resources, and technical feasibility
Led the migration to a product discovery tool to improve transparency and cross-team collaboration
Served as a liaison between tech and business teams
Managed data-driven sustainability projects for the largest key account, including implementing regulatory reporting (ISO 14083) on greenhouse gas emissions
Delivered complete data integration across 20+ source systems, coordinating onboarding and translating business requirements into technical specs for the development team
Enhanced the client's emission tracking and reporting accuracy through data quality analyses and identifying optimization opportunities
Thorsten Boock
Last position:
Senior Backend Engineer at VTG Rail Europe
traigo is VTG's digital rail logistics and fleet management platform. It processes large volumes of telemetry, mileage, geofence, sensor and wagon-movement events in near real time and provides operational services for rail logistics customers across Europe.
As part of Team Customer Selfcare, I worked on the design, implementation, optimisation and operation of large-scale backend services and event-driven processing pipelines — covering both feature development and operational ownership of business-critical production systems. I also regularly acted as first responder for production incidents, data inconsistencies and performance investigations across multiple distributed services.
- Design and implementation of event-driven backend services.
- Migration and replacement of legacy processing pipelines.
- Development of replay / rebuild mechanisms for large event datasets.
- High-throughput asynchronous event processing on SNS / SQS.
- Database and query optimisation for PostgreSQL and DynamoDB.
- Design of scalable read / write models and aggregation pipelines.
- Production troubleshooting and operational support.
- Performance tuning and infrastructure scaling.
- Design and stabilisation of integration and system tests.
- Technical concepts, architecture documentation, and cross-team collaboration.
- Support the further development of existing GitLab CI/CD pipelines
Geofence & Wagon Stay Processing
- Algorithm to detect vehicles within geofences (entry, exit, dwell time).
- Event sourcing with guaranteed chronological order within the affected time window.
- Refactored geofence event and wagon-stay processing logic for performance.
- Resolved race conditions and event-ordering problems in distributed services; server-side filtering, aggregation and optimised query pipelines.
- Repair and replay tooling for corrupted or inconsistent movement data.
Fleet Metadata & Mileage
- Modernised the service; migrated storage from DynamoDB to PostgreSQL to improve traceability and accelerate new features.
- Scalable mileage aggregation and replay mechanisms.
- Read / write models and optimised queries for high-volume mileage calculations.
Sensor & Telematics Integration
- Integrated telemetry and sensor processing pipelines.
- Snapshot and state-calculation logic for sensor systems.
- APIs and persistence models for wagon sensor data; data-quality improvements.
- Further development of a service using gRPC for intra-service communication.
Movement Segment Processing & Routing
- Migrated services to new movement-segment event streams.
- Built replay and rebuild tooling for segment correction.
- Optimised throughput and reliability for high-volume event processing.
Condition Monitoring & Wagon Analytics
- APIs and backend services for wagon condition monitoring.
- Brake-wear prediction processing and wagon analytics functionality.
- PostgreSQL views and optimised query models for operational dashboards.
Operational Reliability - First Responder
- Investigated production incidents and distributed-system failures; DLQ analysis, replay and operational recovery.
- Tuned database performance and AWS infrastructure under production load.
- Improved observability, monitoring and operational tooling.
- Supported rollout strategies, monitoring and post-deployment stabilisation.
Hemangi Tawade
Last position:
Founder & Principal Advisor
- Diagnose genuine AI-readiness in procurement environments before technology investment is committed
- Identify where data quality gaps, process immaturity, and governance failures will cause AI initiatives to stall
- Guide leadership teams through the strategic, organisational, and technical decisions that determine whether AI deployments succeed or fail
- Conduct the PAF-I Diagnostic (Procurement AI-Fitness Index), a structured assessment across procurement data, process maturity, technology landscape, governance, and organisational capability
- Produce a scored AI-readiness profile with a prioritised action roadmap for leadership
- Deliver engagement models including clarity work packages, alignment work packages, momentum work packages, transformation advisory, and executive workshops
Serkan Uyanik
Last position:
Manager Finance, Risk & Regulatory Reporting at movisco AG
- Project leadership and management
- Implementing reporting solutions in banks
- Enhancing and optimizing reporting processes in bank finance and risk departments
- Consulting through all phases of regulatory requirement implementation, including requirements analysis, defining business requirements, testing, tool development, and audit-compliant documentation
- Supporting regulatory implementation projects
- Analyzing business requirements and implementing reports
- Acting as a liaison between business and IT
- Publishing on regulatory changes
- Training internal colleagues on regulatory topics
Marleen Kertscher
Last position:
Atlassian Specialist E2E Processes at Energy, Water and Environment
- Atlassian & Business expert
- Lead of 1st, 2nd and 3rd level support, process mapping, process optimization, introduction of a project standard (global user management and documentation) and development of a collaboration platform to optimize teamwork, data management, reporting, ERP transformation
- The client is a sustainability-focused chemical park and offers its employees a full service for the Atlassian product suite. In addition, the adoption of the ERP software by employees, the improvement of data quality and internal exchange or collaboration should be promoted by sharing knowledge and best practices
- Process and standards development
- Project configuration and creation of technical concepts
- Workshops with employees
- Development of scalable solutions and processes and their optimization/automation
- Coordination with department process owners and management
- Process mapping and further development
- Data migration and data mining
- Lead as Scrum Master
- Dashboard for project management with project overview / development of reporting structures
Shahram Djafari
Last position:
IT Project Manager & Consultant (Concept and implementation of EU regulations) at Witt Group / Otto Group
- Planning, steering, and monitoring the Corporate Responsibility Tech Enablement project for IT
- Concept and implementation of the EUDR (EU Deforestation Regulation)
- Concept and implementation of the Eco-Design Regulation
- Continued support of projects within the Corporate Responsibility strategy
- Definition and review of guidelines (e.g. governance, success metrics) and, if needed, analysis of issues and their solutions
- Overall project management, marketing, communication, and quality assurance for the projects
- Creation of the project plan including timeline/roadmap, budget, and resources
- Ensuring compliance with budget and deadlines
- Defining guidelines for project control, methods, and priorities
- Planning and tracking resources and effort, also together with other IT teams
- Evaluation of projects and preparation of results (reporting to management)
- Identification and reduction of risks
- Regular communication with stakeholders
- Steering internal and external stakeholders and service providers (Jira, Confluence, backlog management, task tracking, SharePoint, MS 365 platform etc.)
- Development of standards and process automation
Label: Azure Cloud, Jira, Confluence, Power BI, SAP BW, AWS, Miro, Bee360, Draw.io, SharePoint, MS 365 platform, Trello etc.
Adriana Van Boxtel
Last position:
Board Member – Data Governance & Digital Strategy at IWCA Germany e.V.
- Co-founded the German chapter of the International Women's Coffee Alliance, contributing to strategic vision development and organizational structuring for international development initiatives
- Optimized internal workflows and reduced administrative overhead through systematic process analysis and documentation
- Designed and implemented governance frameworks and data governance standards to support ESG compliance and transparency requirements for NGO operations
- Developed comprehensive data strategy to enhance data quality, transparency, and reporting capabilities across international stakeholder network
Nikolas Reichardt
Last position:
Data Protection Coordinator for Online-Services and Tracking-Technology at Telefónica Germany GmbH & Co. OHG
As a bridge between Legal, IT, and Marketing, my responsibilities include conducting technical due diligence, documentation, and designing privacy-compliant IT functions across multiple B2P Telefónica Germany brands as part of the RAITT digitalization program. Focused on aligning web and app services with GDPR, TDDDG, and Privacy by Design & Default principles.
Core responsibilities included analysing and visualising data flows across customer journeys, validating tracking and martech integrations, and supporting IT teams in designing privacy-compliant digital architectures. Delivered documentation for internal legal assessments and maintained OneTrust governance and cookie-banner accuracy.
Services and technologies involved:
- Identity & Authentication: CIAM (OAuth2, OIDC), login and session handling, customer account services
- Analytics & Measurement: Google Analytics (GA4), Google Tag Manager (Server-side Tagging & Data Stream Design), event tracking and tagging
- Advertising & Attribution: Google Ads, Google DoubleClick / Campaign Manager, Meta Pixel, affiliate partner integrations
- Experience & Personalisation: Adobe Experience Manager (AEM), Adobe Target, Adobe Experience Platform (AEP), Adobe Edge Network
- Security & Delivery: Cloudflare (CDN), PayPal FraudNet
- Compliance & Governance: OneTrust CMP, consent categories, cookie governance, TDDDG-compliant banner logic
- General web/app services: partner APIs, data transfers, tracking schemas, consent-dependent data activation
Saba Malik
Last position:
IT Business Analyst at United Bank Limited
- Gathered and analyzed User Requirements Documents (URDs), authored Functional Specification Documents (FSDs), and synchronized backlog with dev and QA teams to maintain focused release scope.
- Led gap analysis of EDMS (OpenText, FileNet) and RPA PoC (UiPath, Blue Prism), projecting 10% cost savings in document handling and improved screening accuracy.
- Monitored sprint progress, presented roadmap status in technical reviews to C-level executives, and facilitated stakeholder alignment.
- Developed user stories and epics to drive project execution and ensure alignment with business objectives.
- Championed Agile methodologies, enhancing team collaboration and iterative delivery.
Dirk Laudan
Last position:
Project management; Coordinator
- Renovation, refurbishment and construction of two houses in Southern Europe.
- Organization and management of the trades, including hands-on tasks.
- Project management, coordination, documentation and execution.
- Preparation and execution of the sale of the land and buildings.
Discover over 15,000 top freelancers
Statistics of experts using Data Quality
Aggregated from the professional profiles of matched freelancers.
Experience
19 years (Germany: 16 years)
Position duration
2.2 years (Germany: 3 years)
Positions per freelancer
12 (Germany: 10)
Top business areas
Information Technology, Business Intelligence, Project Management
Top industries
Information Technology, Banking and Finance, Transportation
Certification focus areas
Project Management, Information Technology, Business Intelligence
Bachelor's degree or higher
93% (Germany: 96%)
Master's degree or higher
73% (Germany: 68%)
Doctorate
13% (Germany: 11%)
Certifications per freelancer
3
Most common languages
German, English, Spanish
Speak two or more languages
100% (Germany: 98%)
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 Hamburg 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 Hamburg using Data Quality
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
What it covers
Data quality is the discipline of making data fit for use. It focuses on accuracy, completeness, consistency, timeliness, and uniqueness across operational systems, analytics, and reporting. Strong work here prevents bad inputs from spreading into dashboards, customer records, and automated decisions.
Common work
- Profiling source tables and finding outliers, duplicates, and missing values
- Defining validation rules for master data, events, and reference data
- Setting up checks for pipelines, warehouses, and lakehouse layers
- Improving issue handling with clear ownership and remediation steps
Tools and methods
Professionals working with Data Quality often use SQL, dbt tests, Great Expectations, Monte Carlo, Informatica, Talend, Ataccama, or native checks in cloud data stacks. They also work with lineage, catalog, and governance tooling so quality rules stay close to the data and easy to maintain.
When teams need help
Companies bring in freelance experts when data problems block reporting, migrations, integrations, or regulatory work. In Hamburg, that often includes logistics, trade, media, and finance teams that rely on clean master data and reliable event flows across many systems. The right specialist can quickly trace root causes and turn manual fixes into repeatable controls.
What strong experts do
Good professionals do more than spot broken records. They design practical rules, explain trade-offs, and work with product, analytics, and operations teams to fix the source of the problem.
- Balance strict checks with business reality
- Document rules in a way teams can maintain
- Separate one-off cleanup from lasting control
- Improve trust without slowing delivery
Signs to hire
If reports keep disagreeing, duplicates return after cleanup, or imports fail for unclear reasons, Data Quality work is missing or too weak. A seasoned expert can assess the damage, prioritize the highest-risk data sets, and help your team build controls that last.
Frequently asked questions
Everything clients usually want to know about Data Quality, in one place.
Data Quality is used to keep business data reliable enough for reporting, operations, and automation. It helps teams catch missing fields, duplicates, inconsistent codes, and broken formats before those issues affect dashboards or customer processes. In practice, it is part cleanup, part prevention.
Data Quality focuses on whether the data itself is fit for use. Data Governance defines the policies, ownership, and standards around the data, while Master Data Management is about keeping core entities like customers or products aligned across systems. Many projects need all three, but the work and deliverables are different.
A strong Data Quality specialist usually combines SQL, data profiling, rule design, and pipeline testing with a good understanding of source systems. Experience with tools such as Great Expectations, dbt, Informatica, Talend, or Ataccama is useful, but the ability to define clear business rules matters just as much. They should also be comfortable working with analysts, platform teams, and data owners.
You do not need a huge program to justify Data Quality expertise. Freelance help is useful as soon as repeated data issues start hurting reporting, migrations, integrations, or compliance work. A specialist can often add value quickly by assessing the worst problem areas and setting up a practical first layer of controls.
Most Data Quality work can be done remotely because the core tasks are analysis, rule design, and collaboration around data definitions. On-site time in Hamburg can help when teams need workshops, stakeholder alignment, or access to local business context. Many engagements work best as a mix of both.
Ask which data domains the Data Quality expert has handled, how they approach root-cause analysis, and how they turn findings into lasting checks. It also helps to ask how they document rules, handle exceptions, and measure whether the fixes actually stick. The best answers are concrete and tied to real data flows.
If the same issues keep coming back, your Data Quality controls are probably too weak or too manual. Another sign is when teams do their own cleanup in spreadsheets because they do not trust the source data. Frequent reconciliation work and unexplained report mismatches are also clear warnings.
Look for clear rule definitions, traceable fixes, and a practical way to monitor whether issues return. A strong Data Quality expert should be able to explain what was checked, why it mattered, and how the process will keep working after they leave. Good work reduces noise without creating unnecessary friction for the business.
The average hourly rate of freelancers in Hamburg, Germany who have used Data Quality in their recent projects is 106 €, which corresponds to a daily rate of about 847 € based on an 8-hour working day.
Of the freelancers in Hamburg, Germany who have used Data Quality in their recent projects, 93% hold at least a Bachelor's degree, 73% hold at least a Master's degree, and 13% hold a doctorate.
On average, freelancers in Hamburg, Germany who have used Data Quality in their recent projects have 19 years of professional experience, with a single engagement typically lasting around 2.2 years.
The most common languages among freelancers in Hamburg, Germany who have used Data Quality in their recent projects are German (100%), English (100%), and Spanish (16%).
The most common industries among freelancers in Hamburg, Germany who have used Data Quality in their recent projects are Information Technology (84%), Banking and Finance (47%), and Transportation (47%).
The most common business areas among freelancers in Hamburg, Germany who have used Data Quality in their recent projects are Information Technology (95%), Business Intelligence (79%), and Project Management (68%).
Main locations of FRATCH Experts, who have recently used Data Quality
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 
Munich 
Cologne 
Frankfurt 
Stuttgart 
Dusseldorf 
Hanover 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
