A/B Testing Experts in Hamburg
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Meet FRATCH Experts in Hamburg, who have recently used A/B Testing
Thomas Kostrewa
Last position:
Agile Coach / Release Train Engineer (SAFe) – Product & Cross-functional Delivery Focus at Autonomous Driving / Connectivity (OEM, confidential)
- Orchestrate cross-functional delivery across organisational units in the Connectivity domain, aligning teams around integrated end-to-end, customer-testable value rather than isolated component delivery.
- Drive a shift from local component optimisation towards shared outcomes and a common delivery goal, increasing focus and enabling significantly faster integrated delivery.
- Coordinate across 15 cross-functional organisations in a highly complex OEM environment; bring Product, Engineering, Programme Management and specialist functions together to resolve dependencies and improve decision-making.
- Coach Product Managers, Product Owners and stakeholders on product responsibility, prioritisation, outcome orientation and aligned backlogs.
- Use Claude through an AWS Bedrock integration to analyse Jira and Confluence content, identify patterns, dependencies and quality gaps, and support structured product and delivery decisions.
- Establish AI-native requirements excellence with LLM-supported quality gates for epics, features, stories, acceptance criteria, roadmaps and task breakdowns; scale adoption through templates and prompt playbooks.
Melika Alborzi
Last position:
UX/UI Designer at Twoloox GmbH
- Sole UX designer on a full product redesign and the foundations of a design system for Widget Designer, a B2B professional desktop tool for real-time media control used in live events and installations, working with a product manager and two engineers.
- Grounded the redesign in user feedback, a product audit, and competitor analysis, which surfaced where the tool's depth had outgrown its usability, leaving expert operators to manage complexity in live moments where errors are immediate and irreversible.
- Restructured the workspace, navigation, and panels around the operator's real workflow, so they keep the full depth of control while gaining the clarity to act with confidence under live pressure.
- Extracted a design system from the redesign: semantic color roles, component states, spacing rules, and reusable dialog and form patterns, with foundational accessibility built into color contrast and state feedback, validated through prototypes against the legacy codebase and giving design and engineering a shared foundation to build from consistently and at speed.
Thomas Wittlinger
Last position:
Chief Product Officer at OWNLY FinTech GmbH
Freelance work for a large German family office
Built and further developed a modular B2B SaaS platform for professional wealth management and family offices, alongside freelance delivery of production-ready AI, data management, and automation solutions for the wealth management sector.
- Developed an AI governance framework for regulated finance and asset management workflows, aligned with DORA, BaFin-related governance expectations, and data protection requirements, including role definitions, access levels, and decision rules.
- Designed an agentic system with a locally operated open-source language model, including Qwen2.5 via Ollama, for secure querying of an asset database through text-to-SQL-to-text workflows.
- Built AI-supported analysis and reporting capabilities that generate structured answers, tables, and charts from asset data, with domain validation through resolver logic and RAG elements.
- Developed production-grade data import workflows for financial service provider data from CSV, PDF, and API sources, including validation, plausibility checks, and reconciliation with existing asset data.
- Solved the asset matching problem without a cross-system primary key through multi-stage validation rules and human-in-the-loop approvals.
Results:
- Secured EUR 250,000 in SaaS revenue in 2024, exceeding the forecast by 20%.
- Acquired family office clients with EUR 1.6bn in assets under management.
- Reduced manual effort for the largest client by approx. 3 days per month through automated data import and reconciliation processes.
- Reduced operational error risk through structured data validation, multi-stage asset matching, and human-in-the-loop approvals.
Sascha Moses
Last position:
Freelance Mandate at PAYONE
- Strategic support for the CRM team in Kiel for Jaguar Land Rover.
- Development and implementation of industry-specific CRM strategies for marketing automation for Jim Beam.
- Development and implementation of target group-specific anti-churn and retention strategies for Landesbank Berlin.
- Selection and onboarding of service providers and agencies for Melitta.
- Consulting on the development of strategic processes and on the selection and implementation of a marketing automation software for Miles & More.
- Development and establishment of segmentation approaches based on use cases and customer value for NIVEA.
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.
Tim Adamitz
Last position:
Performance Marketing Freelancer at Self Employed
- I develop tailored online marketing strategies for my clients that reach the target audience and fit the budget
- My marketing expertise covers Google Ads, Meta Ads, Pinterest Ads
- Strategic and operational marketing support, strategy development and implementation
- Set up, optimization and supervision of online marketing campaigns including target groups, budget recommendations, forecasts, keyword research and general planning of campaigns
- Generation of reports including interpretations and action recommendations for the media part
Marc Clasen
Last position:
Consultant and Interim Manager at Marc Clasen Consultancy
- Strategic marketing and IT consulting with a focus on CRM
- Consulting for companies after buyout and restructuring of the business (eCommerce, marketing, IT, product management) in retail, automotive, DIY, building materials, TIMES, and tourism
- Strategy development for marketing, sales, and digital strategy, among other things
- Running IT tenders and implementation (ERP, CRM, POS, eCom, PIM, CMS, DAM)
- Implementation and data integration of CRM in marketing including loyalty program and campaigns
- Support for pitches for IT systems, implementation service providers, and agencies
- Development of omni-channel sales campaigns (online and offline) including customer journey and definition of insights and channels
- International scaling of business models
- Processes, organization, setup, and optimization of agile structures
- Development of SEO/SEA/content and CRM processes and structures
- Building marketing structures and strategies
Matthias Eymers
Last position:
Lead Android Developer at Star Finanz-Software Entwicklung und Vertriebs GmbH
- Further development of the Android app "StarMoney"
- Major XML to Compose redesigns
- Introduction of new technologies and architecture
- Implementation of instant bank transfer
- Development following the agile Scrum process
Jonas Taulien
Last position:
IT Consultant at Bechtle AG
- Prequalified 200 demands within five weeks on the multi-cloud-commerce platform bechtle-clouds.com with three external consultants
- Served a dual role as project manager and requirements engineer for various enhancements
- Domain topics: reimplementation of Entra ID Sync, improvement of support processes, optimizations in the product catalog
- Demand and project management in ServiceNow
- Refinement of epics and stories with internal teams and external service providers
- Management of the external international service provider
Nazanin Hemmati
Last position:
E-Commerce & Marketing Consultant at Freelance
- Built and optimized Shopify storefronts end-to-end: setup, UX flow, analytics, and Go-To-Market Strategy (GTM) conversion tracking.
- Implemented Klaviyo for segmentation and lifecycle automations (welcome, abandoned-cart, post-purchase, win-back).
- Planned and executed full-funnel acquisition and retention programs across Meta, Google, TikTok, and email channels.
- optimized campaign performance and ROAS through A/B testing, refined audience targeting, and ongoing conversion-rate improvements.
- Supported brand-building efforts through content planning, campaign calendars, and on-site optimization.
- Key project: Lucky Bambino Studios, a creative streetwear concept where I led digital strategy, e-commerce setup, and performance marketing.
Silke Faust
Last position:
Email Marketing Manager at Stage Entertainment
- Planning and execution of the automated customer journey for newsletter mailings, including improving the conversion rate.
- Developing and implementing targeted and seasonal email campaigns.
- Analyzing campaign data to optimize customer outreach.
- Increasing open rates through targeted segmentation strategies.
- Coordinating the creative team to design engaging content.
- Creating monthly performance reports to measure success.
Andzelika Gürich
Last position:
Axel Springer SE
Travelbook & MyHomeBook
- › Short-form video formats for Travelbook & MyHomeBook.
- › Editorial preparation of travel and home topics.
Timo Daedrich
Last position:
External Consultant for E-Commerce and Online Shops at Wörner Medizinprodukte und Logistik GmbH
- Project leadership for the relaunch of the B2B online shop based on SAP Commerce (formerly Shopware 5)
- Coordination of internal and external resources
- Stakeholder management and requirements management
- Support in the functional concept design of features
- Creation of project reports and running SteerCo meetings
- Leading and moderating regular meetings and alignments
- Consulting on the company's e-commerce strategy
- Sparring partner for the Head of E-Commerce
Padma Priya Srinivasan
Last position:
Certified Data Scientist at XDi
- Successfully completed a 3.5 month data science course, earning the ‘Certified Data Scientist’ title from XDi, Germany (AZAV certified).
- Covered supervised and unsupervised machine learning algorithms.
- Covered natural language processing using Python.
Aravind Sasi Nair Purayath
Last position:
AI – Data Specialist at Emirates Islamic Bank
- Architected and deployed LLM based AI agents, RAG pipelines, and vector search solutions for decision support across retail banking department.
- Developed and shipped robust AI pipelines with guardrails, error handling, monitoring, and fallback logic ensuring high reliability outcomes and compliance with data privacy.
- Developed and deployed ML models to identify transactional anomalies, improving fraud detection and risk assessment in high-volume datasets for credit risk modelling.
- Built, evaluated and fine-tuned ML models to generate propensity scores for customers used to drive personalized targeting campaigns for credit cards and personal finance/loan products.
- Developed an NLP pipeline using BERT embeddings and spaCy NER for SMS/email analysis and customer query logs.
- Trained machine learning models using Isolation Forest to classify user behaviour and detect anomalies.
- Extracted, cleaned, enriched and feature engineered datasets from different sources to build feature stores that powered ML model training.
- Led development of dashboards using Power BI, Grafana, and Prometheus to monitor model performances, KPI trends, and marketing metrics.
- Built multi-touch attribution models using logistic regression and time-decay weights to evaluate lead quality.
- Developed scalable ETL pipelines from CRM, T24, SAP, and ERP, supporting millions of monthly transactions.
- Integrated testing and CI/CD workflows for robust data pipeline deployment.
Discover over 15,000 top freelancers
Statistics of experts using A/B Testing
Aggregated from the professional profiles of matched freelancers.
Experience
15 years (Germany: 14 years)
Position duration
2.2 years (Germany: 2.1 years)
Positions per freelancer
10 (Germany: 8)
Top business areas
Marketing, Product Development, Business Intelligence
Top industries
Information Technology, Advertising, Banking and Finance
Certification focus areas
Information Technology, Marketing, Product Development
Bachelor's degree or higher
89% (Germany: 93%)
Master's degree or higher
42% (Germany: 62%)
Certifications per freelancer
2
Most common languages
English, German, Persian
Speak two or more languages
100% (Germany: 99%)
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 A/B Testing
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
A/B testing compares two or more variants to see which one performs better on a defined goal. Teams use it to improve landing pages, checkout flows, email campaigns, product features, and pricing tests. It is also called split testing, and in some teams the work sits inside broader experimentation programs.
Where it fits
- Web and app conversion work
- Product feature rollout decisions
- Marketing message and creative tests
- Funnel, onboarding, and retention work
Strong experts define the hypothesis, choose the metric, and keep the test isolated enough to trust the result. They know when a test is too small, when it is polluted by traffic issues, and when a result is only a short-term lift.
Tooling and data
A/B testing usually sits near analytics, tag management, feature flags, and event tracking. Common work includes setup in tools such as Optimizely, VWO, Adobe Target, or in-house experimentation stacks. Good specialists also work with statistics, QA, and product analytics so the test design matches the data model.
When to bring in help
Companies often bring in freelance expertise when tests stall, tracking is messy, or the team needs a clean experiment plan fast. In Hamburg, this is common for e-commerce, media, travel, and SaaS teams that need careful collaboration across product, marketing, and analytics. Remote work is often enough, but on-site sessions can help align stakeholders on goals and edge cases.
What strong experts do
Strong A/B testing professionals write sharp hypotheses, validate event tracking, and check that samples and segments make sense before launch. They review experiment guardrails, look for biased traffic, and explain results in plain language. They also know when split testing is not enough and a multivariate test or a different research method is a better fit.
Good signs
- They ask about goals, not just variants
- They can explain confidence, lift, and guardrails simply
- They check tracking before launch
- They know Optimizely, VWO, or similar tooling
- They can turn results into next steps
A strong specialist leaves teams with a clearer decision, not just a report. That matters when tests affect revenue, user experience, and product direction at the same time.
Frequently asked questions
Everything clients usually want to know about A/B Testing, in one place.
A strong A/B testing expert helps turn ideas into clean experiments. They define the hypothesis, choose the right metric, set up the variant logic, and check the result so the team can trust it. That work is common in conversion pages, product features, onboarding flows, and email testing.
A/B testing and split testing are often used to mean the same thing: comparing two versions to see which performs better. Some teams use A/B for two variants and reserve split testing for traffic splits or broader experiment setups. The important part is the test design, not the label.
A A/B testing specialist often works with Optimizely, VWO, Adobe Target, or a company’s own experimentation stack. They also need analytics tools, tag management, and event tracking to make sure the data is reliable. The best choice depends on how the site or app is built and how much control the team needs.
A good A/B testing freelancer usually brings analytics, tracking setup, basic statistics, and some product or CRO thinking. Many also understand feature flags, QA, funnel analysis, and how experiments affect SEO or app release flows. That mix matters because the test only works if the data and implementation are solid.
A small A/B testing task may only need someone who can audit tracking and refine one experiment plan. A larger program needs someone who can design a test roadmap, review sample quality, and help the team interpret edge cases. If decisions are business-critical, choose a specialist who has worked through false positives and bad data before.
Yes, most A/B testing work can be done remotely because the key inputs are product access, analytics access, and clear stakeholder communication. In Hamburg, on-site sessions can still help when teams need fast alignment across product, marketing, and analytics. Remote collaboration works well if the setup process and reporting rhythm are clear.
A strong A/B testing expert asks about goals, traffic, tracking, and decision rules before talking about variants. They should be able to explain why a result is reliable, why it is not, and what to do next. If they only talk about lifts and ignore data quality, that is a warning sign.
Even with tools in place, A/B testing can fail if the hypothesis is vague, the tracking is inconsistent, or the variant logic is flawed. A specialist can review your setup, improve test design, and help the team avoid misleading conclusions. That is useful when the tool is there but the process is not.
The average hourly rate of freelancers in Hamburg, Germany who have used A/B Testing in their recent projects is 93 €, which corresponds to a daily rate of about 744 € based on an 8-hour working day.
Of the freelancers in Hamburg, Germany who have used A/B Testing in their recent projects, 89% hold at least a Bachelor's degree and 42% hold at least a Master's degree.
On average, freelancers in Hamburg, Germany who have used A/B Testing in their recent projects have 15 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 A/B Testing in their recent projects are English (100%), German (95%), and Persian (20%).
The most common industries among freelancers in Hamburg, Germany who have used A/B Testing in their recent projects are Information Technology (65%), Advertising (55%), and Banking and Finance (50%).
The most common business areas among freelancers in Hamburg, Germany who have used A/B Testing in their recent projects are Marketing (85%), Product Development (70%), and Business Intelligence (65%).
Main locations of FRATCH Experts, who have recently used A/B Testing
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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Philipp Thomaschewski
FRATCH CEO
