Apache Spark Experts in Hamburg
in minutes from 15,000 CVs with the power of AIHire experts who build Spark batch jobs, streaming pipelines, and lakehouse workflows with PySpark, Scala, and Spark SQL. From ETL tuning to cluster troubleshooting, get fast, precise matching with vetted, available freelancers.
Meet FRATCH Experts in Hamburg, who have recently used Apache Spark
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.
Marc Matt
Last position:
Freelance Data Specialist at BrightlySoftware – A Siemens Company
- Migration of customer data from a private cloud to AWS
- Optimizing data transformation jobs and migration from Talend to AWS Glue
- Automation of all migration steps
- Used technologies: AWS, Python, Lambda, CloudFormation, SQLServer, AWS Stepfunctions, Glue, PySpark
John Von Saurma
Last position:
Interim Head of Content & Social Media at Luckychef.com
- Creation and planning of the content plan
- Editorial planning for 10 channels
- Image shoot (organization, coordination, execution)
- Selection of image, text and video content
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.
Ahmed Marzouk
Last position:
Head of Data Department at Fotograf Gmbh
- Building teams of data people - BI Analysts, Data Scientists, Data Engineers
- Defining data strategy across all business units to support short, mid & long-term business goals
- Collaborating with the product leads & management & heads of departments to provide data support
- Defining budget to make everything happen
- Aligning the data teams goals with company vision, strategy & objectives
- Responsible for the data governance as well as for the strategic development planning
- Defining and developing joint OKRs
- Reporting directly to the CTO & CEO
Hannah Teichert
Last position:
Product & UX Designer at Freelance
Moin-Inbox! | Brand & Web Design
- End-to-end rebrand development (discovery, mood boards, logo, style guide) and consulting on web design implementation.
Tools: FigJam, Figma, Claude
Mission-Mittelstand (Bubora) | Product Designer (in tandem)
Web app that relieves small and medium-sized business owners of administrative processes – including onboarding and knowledge sharing via an LMS and AI assistant, plus community channels, time tracker, org chart and forms.
- Drove prioritisation of strategic next steps – first around stakeholder management, later around feature and page scope
- Managed project coordination, documentation and audits, including maintaining a Notion-based task board
- Developed the information architecture (IA) in tandem in FigJam and translated it into stakeholder-ready frames and prototypes based on shadcn UI components
- Used AI-assisted workflows to structure discovery input and speed up early-stage wireframe iteration
- Independently delivered 70+ screens and 15+ new global components for the MVP rewrite within a 5-week timeline
- Designed the AI assistant as a core feature, including all edge cases and flows
- Drafted initial concepts for the LMS as the second core feature
- Designed the org chart, profile page, login page, and all global design system components
Tools: FigJam, Figma, Claude, Notion, Hotjar, Google Analytics
DAILIA | Founding Designer
Native app conceived as a digital best friend for FLINTA and menstruating people – focused on the female body and holistic support through all life stages.
- Owned the UX strategy from the initial idea as founding designer
- Led UX workshops and developed proto-personas and user flows as a foundation for product decisions
- Created IA, Lo-Fi Wireframes and Prototypes for stakeholder and investor presentations
- Developed the branding and a brand style guide
Tools: FigJam, Figma, Loom
Jobcenter Dortmund | Agency: WAYS | UX Design
Website for a public-sector client, implemented as a mobile-first web app – going beyond pure information delivery with a smart form that adapts to individual user needs.
- Tested and validated the information architecture for a mobile-first web app for a public-sector client
- Designed a smart, adaptive form that dynamically adjusts to individual user needs
- Built wireframes with a strong focus on accessibility for a broad, diverse user group, plus documentation
Tools: Miro, Figma, Google Docs
Hartmann Direct | Agency: Valtech | UX/UI Design
- UX/UI design and ongoing design system maintenance for an enterprise setup
Tools: Figma, JIRA, Confluence
VW Autosuche | Agency: Dayone | UI Design
- UX/UI design, design system maintenance and illustration for an automotive client project
Tools: Figma, Adobe Illustrator
ZASTA | UX/UI Design
- UX audit of the onboarding flow, followed by UI design and prototyping
Tools: Figma
swat.io | Social Media & Web Design
- UX audit of the pricing page, including web design implementations, video editing and social media templates
Tools: Figma, Adobe Photoshop, CapCut
AHEAD Automotive | UX/UI Design
- UX audit of a dashboard, followed by UI design and prototyping
Tools: Figma, Loom
vigo Versicherungen | Agency: disphere | UX/UI Design
- Brand design, wireframing, UI design and prototyping
Tools: FigJam, Figma
C.O.X. Steuerberatung | Agency: jut-so | UX/UI Design
- Wireframing, UX/UI design, and prototyping
Tools: Figma
BibelTV | UX/UI Design
- Wireframing, UI design, and prototyping
Tools: Figma, Adobe Photoshop
RegioHealthNews | Agency: Tigerbytes | UI Design
- UI design
Tools: Figma
ME2BE | Graphic & Web Design
- Web design, editorial magazine design, and social media templates
Tools: Figma, Adobe Photoshop, Adobe InDesign, Adobe Illustrator, Canva
Waterways Protection | Art Direction
- Podcast design assets, social media design, and art direction
Tools: Adobe Photoshop
Paul Valentine | Packaging Design
- Packaging design and illustration
Tools: Adobe Illustrator, Adobe Photoshop
Daniel Pape
Last position:
Professional Development
Attained AWS Certified Cloud Practitioner certification.
Mastered Rust through self-study, including books, online courses, and open-source contributions.
Developed a serverless web application using AWS (RDS, Lambda, Polly, Amplify) and TypeScript/React/D3, managed infrastructure with CDK.
Continuously stayed updated with industry trends through self-education, webinars, and workshops, exploring Data Mesh and FastAPI.
Frank Wolf
Last position:
Fullstack Software Developer at Goodright GmbH
- Built backend APIs using Quarkus, Kotlin, MongoDB, Docker Compose and NGINX
- Developed frontend with React, TypeScript and Ant Design
Mirco Marahrens
Last position:
Senior Software Engineer at Vattenfall
- Lead of the platform engineering team for the development of a platform for energy trading, focusing on high availability, low latency, and scalability of libraries and services
- Supporting quants and market access solutions for energy trading, including market access integration and deployment of algorithmic trading strategies
Discover over 15,000 top freelancers
Statistics of experts using Apache Spark
Aggregated from the professional profiles of matched freelancers.
Experience
16 years
Position duration
2.2 years (Germany: 2.7 years)
Positions per freelancer
10 (Germany: 11)
Top business areas
Information Technology, Product Development, Business Intelligence
Top industries
Information Technology, Advertising, Retail
Certification focus areas
Business Intelligence, Information Technology, Product Development
Bachelor's degree or higher
100% (Germany: 96%)
Master's degree or higher
71% (Germany: 73%)
Doctorate
14% (Germany: 11%)
Certifications per freelancer
5 (Germany: 4)
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 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 Apache Spark
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
Spark at a glance
Apache Spark is a distributed data processing engine for large-scale analytics, batch jobs, and streaming workloads. Companies use it to transform raw data, join large tables, and feed dashboards, ML pipelines, and lakehouse layers. It fits teams that need speed, scale, and clear control over data flow.
Common projects
- ETL and ELT pipelines
- Structured Streaming jobs
- Spark SQL reporting layers
- Feature engineering for ML
- Data lake and lakehouse processing
Spark appears in data platforms that run on Hadoop, cloud storage, and managed clusters. In Hamburg, it often supports logistics, trade, media, and analytics teams that work with mixed batch and near-real-time data.
Skills that matter
Strong Apache Spark professionals know DataFrames, RDDs, Spark SQL, and the runtime model behind partitioning and shuffles. PySpark and Scala are the most common ways to work with it, and many projects also touch Delta Lake, Kafka, Hive, or Airflow. Good experts write code that is readable and efficient.
When freelancers help
Companies bring in Spark specialists when jobs run too slowly, pipelines fail under load, or a new data product needs to launch quickly. Freelance help is also useful for migration work, code review, cost reduction, and setting up reliable jobs across dev, test, and production. Clear handover matters.
What strong experts do
They inspect plans, data sizes, and cluster settings before changing code. They reduce shuffles, manage memory, and design jobs that recover cleanly after failures. They also document schemas, inputs, outputs, and scheduling so internal teams can keep the system stable.
Ecosystem and fit
Spark is often chosen with cloud storage, Kafka, Delta Lake, and notebook tools. It is a strong fit when a company needs one engine for large batch processing and streaming, rather than separate systems for each task. In Hamburg, remote collaboration works well when access to data and cluster logs is set up early.
Frequently asked questions
The facts hiring teams ask for most often when it comes to Apache Spark.
Apache Spark is used for large-scale data processing, including ETL, streaming, analytics, and feature preparation for machine learning. It is a good fit when data arrives in many formats and needs to be cleaned, joined, and reshaped before people or systems use it.
Spark is often chosen for flexible batch processing and shared code across SQL, Python, and Scala. Compared with Hadoop MapReduce, it is much better for iterative work; compared with a warehouse, it gives more control over transformation logic; compared with Flink, it is often simpler for teams that focus on batch first and stream second.
A strong Apache Spark specialist usually knows PySpark or Scala, Spark SQL, and basic data modeling. Common adjacent skills include Kafka, Delta Lake, Hive, Airflow, cloud storage, and cluster operations, because Spark work rarely lives on its own.
A Spark project that only needs a few transformations is very different from one that must process millions of records, handle late data, and recover from failures. For complex pipelines, look for someone who has worked with partitioning, memory pressure, joins, and production monitoring, not just notebooks.
Yes, most Apache Spark work can be done remotely if the team provides access to code, logs, and data environments. On-site time is only needed when the setup is sensitive, the data platform is being redesigned, or the internal team wants hands-on workshops.
Look for clear answers about shuffles, serialization, data skew, and job recovery in Spark. Good specialists explain trade-offs, show how they measure performance, and write code that is easy to maintain, not just fast on one test case.
PySpark is enough for many projects, especially when the team already works in Python. Scala becomes more important when the codebase is deeply tied to Spark internals, performance tuning, or an existing Scala platform, but it is not required for every engagement.
Prepare sample data, pipeline diagrams, recent failure logs, and a clear goal for the Apache Spark work. The best results come when the specialist can see where the data starts, how it moves, and what output the business expects.
The average hourly rate of freelancers in Hamburg, Germany who have used Apache Spark in their recent projects is 98 €, which corresponds to a daily rate of about 783 € based on an 8-hour working day.
Of the freelancers in Hamburg, Germany who have used Apache Spark in their recent projects, 100% hold at least a Bachelor's degree, 71% hold at least a Master's degree, and 14% hold a doctorate.
On average, freelancers in Hamburg, Germany who have used Apache Spark in their recent projects have 16 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 Apache Spark in their recent projects are German (100%), English (89%), and French (33%).
The most common industries among freelancers in Hamburg, Germany who have used Apache Spark in their recent projects are Information Technology (89%), Advertising (56%), and Retail (56%).
The most common business areas among freelancers in Hamburg, Germany who have used Apache Spark in their recent projects are Information Technology (100%), Product Development (89%), and Business Intelligence (78%).
Main locations of FRATCH Experts, who have recently used Apache Spark
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 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
