Haskell Experts in Germany
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Meet FRATCH Experts in Germany, who have recently used Haskell
Kiriakos Krastillis
Last position:
Tech Lead / Architect : OTTO API Platform at OTTO
maturing their API Practices on both, a Business and Technology level. My role encompasses strategy, architecture, developer advocacy as well as hands on software engineering, enabling both technical teams and business leadership to adopt and act on API- centric principles effectively. Coincidentally, we also establish GitOps, DX and Platform Best practices with this project.
Highlights:
- Aligning executives with the initiative by clarifying strategy, replacing misconceptions and myths with facts, clarifying the value of existing assets and enabling informed decision-making
- Formulating a way forward for API Lifecycle Management at OTTO
- Driving platform progress and fostering developer engagement by hands-on engineering work towards strategic goals
API Lifecycle Management, Team Topologies, Organizational Evolution, Regulatory, Platform Advocate, Developer Platform, Communities of Practice, Terraform, Kotlin, Kafka, Kong, WSO2, Apigee, Gravitee, Backstage, AsyncAPI, OpenAPI, API Design, AWS, react, nodejs, typescript, redocly, reactive programming, CDC, golang, gingonic, GitOps, DX (developer experience), stakeholder management, roadmaps, workshops, discovery.
Hans-Christian Riess
Last position:
AI Voice Systems Consultant at QuantaLingo
Consulting and prototype work on AI voice and multilingual agent systems, using AI-assisted delivery across realtime translation prototypes, call-centre automation, and voice-to-voice consultation workflows.
- Built and advised on AI voice / agentic conversation prototypes, including realtime translation and consumer-facing consultation experiences.
- Worked across call-centre automation, voice UX, product architecture, implementation tradeoffs, and prototype development.
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
Wolfgang Oellinger
Last position:
Fullstack Software Developer at Gematik
Development of the frontend of DEMIS (German Electronic Reporting and Information System for Infection Protection)
Technologies: Angular, Typescript, Single-SPA MicroFrontend, Java, Docker, Kubernetes, Postgres, REST
Prototype development of a compiler from HL7 FHIR to AngularFormly
Albrecht Noack
Last position:
Senior Project Manager IT at HAYS Technology Solutions GmbH
- Leasing, lifecycle and process management for Apple iPhones, maintenance and expansion of the MDM system, coordination of leasing, device integration into DEP and MDM, followed by a rollout and hardware swap process, plus a BYOD and Android option
- Migration of the IT ticket system from ManageEngine ServiceDesk Plus to Atlassian Jira Service Management: project management, definition of ticket types, seamless execution according to a detailed timeline, user communication, decommissioning of the old system
- Project lead: SAP interface in workforce management to automate reading of working hours
- Sub-project lead for inventory software EZO AssetSonar: demand management, software selection, procurement
Ivan Greguric-Ortolan
Last position:
Technical Lead at Porsche Digital GmbH
- Contributed to the design of the new financial services integration layer and moderated the architectural discussions
- Oversaw the security concept and approval of the application
- Prepared infrastructure setup and best practices for the Kotlin backend
Stephan Sahm
Last position:
Senior Data/ML Consultant & Technical Lead at Jolin.io
Role: Software Engineer & Applied Mathematician (Mathematical optimization for scheduling; duration: 1 months; team setting: Team of 2, remote; technologies: JuMP, Julia, Pluto, Svelte, JavaScript, TypeScript, JetBrains Space, Terraform, Nomad)
Role: Software & Cloud & Web Engineer (Building scalable data science compute cluster from scratch; duration: 11 months; team setting: Team of 1, on-site; technologies: Terraform, Kubernetes, k8s ingress, k8s services, k8s RBAC, k8s networking, k3s, etcd, S3, DNS, certificates, Julia, Pluto, JavaScript, Tailwind, Astro, npm, Parcel, Preact, MUI, JWT, AWS SQS, AWS RDS, Python, GitLab, GitHub)
Role: AI & Web Engineer (Custom ChatGPT service; duration: 1 months; team setting: Team of 2, remote; technologies: Python, Poetry, LangChain, Tailwind, ChatGPT API, Flask, FastAPI)
Role: Architect & Data Engineer (Central datalake setup and ingestion; duration: 9 months; team setting: Team of 5, remote; technologies: Infrastructure-as-code, AWS CDK, Python, Boto3, PySpark, AWS Glue, IAM, S3, ECS, Fargate, Lambda, Apache Hudi, DeltaLake, Databricks, GitHub, Jira, Miro)
Role: Software Engineer (PoC Julia migration of scikit-decide; duration: 1 months; team setting: Team of 2, remote; technologies: Python, Julia, GitHub)
Kaan Dönmez
Last position:
IT Consultant at Tensora GmbH
Atef Abdel-Rahman
Last position:
System, load, acceptance and performance testing and QA manager for banking systems
- Test concept, planning and execution
- Coordination of the different test phases
- Project planning within the team, design of the structure and test strategy
- Coordination and review of test activity execution and deviation management
- Derivation of test cases for newly developed features with respect to functional and non-functional requirements and subject matter
- Participation in status meetings
- Documentation of technical components
- Description of the qualitative and quantitative goals of the test measures
- Definition of testable acceptance criteria
- Screening of new and existing customers for negative information
- Evaluation of information and decision on whether a business relationship is still possible
- Assessment of negative information regarding sanction or terror lists
- Assessment of whether individuals have a criminal record or are politically exposed
- Continuous Integration and quality assurance (QA)
- Description of using various testing methods and approaches (static/dynamic tests, functional/non-functional tests, black-/white-box tests)
- Execution of manual and automated tests
- Fixing errors from the testing phases in applications/components
- Integration of test management in the introduction, establishment and expansion of test automation
- Creation of system test documentation
- Reporting risks and issues to technical architects and project management
- Definition of requirements for the test infrastructure
- IT system environment: Windows, SAP, Perl, C, Git, Cloud, Oracle, JavaEE, C#, SOA, XML, JavaScript, HTML5, Angular, JBoss, UML, Linux, Jira, Robot Framework, TypeScript, Python, JMeter, Tosca, Selenium, DWH, AWS Cloud, Doors
Ege Paksoy
Last position:
AI Research Collaborator at NPO
- Contributed to the Karakutu project, developing AI-driven tools to analyze news in Turkey.
- Assisted in web scraping, applied NER for entity extraction, and built interactive filtering interfaces (Vue.js, Plotly.js) for entity and location based search.
- Performed sentiment and content-shift analysis to detect editorial influence in modified news articles.
Can Celebi
Last position:
Backend development, consulting at Kloppe Media GmbH
- Development and implementation of APIs and SDKs for online services in the telecom environment
- Platform improvements and development of new features for comprehensive telecom solutions
Thomas Hain
Last position:
Software Developer at IT-Spoon GmbH
- New full-stack development and bug analysis and fixing
- Refactoring to a framework
- Customization of shop software
- Connecting SAP interface and exporting data to the shop
- Production control with scheduling
- Integrating invoicing with ZUGFeRD (electronic invoice transmission)
- Technologies used: PHP, MySQL, Symfony, Laravel, JS, jQuery, MSSQL, ZUGFeRD
Heidi Albarazi
Last position:
Venture Developer in Product Design at TUM Venture Labs
- Taught German language and mathematics to children aged 4-16, providing homework assistance and tutoring
- Supported startups in UX, MVP development, and Lean Startup methodology
- Assisted with branding, communication, and design to strengthen market presence
- Maintained website and Venture Lab app; coordinated and ran events
- Developed presentations to support internal and external communications
Jan Wahler
Last position:
Technical Consultant at AI Beratung (KMU)
- Evaluation of RAG for legal advisory (build or buy)
- Evaluation and POC of RAG for an ERP time tracking module
- Consulting on foundation model selection
- Setup AI development environment (eliminating shadow AI)
- AI strategy consulting
- AI-assisted code creation and context engineering make change sets larger
- Strong software engineering expertise, code reviews and safeguarding through pipelines and domain-specific automated test cases
Ananthu M S
Last position:
Research Assistant and Doctoral Student at ESCP Business School
- Conducts doctoral research at the intersection of Artificial Intelligence, optimization, and operations management with a strong emphasis on mathematical modeling and problem-solving.
- Supports academic teaching by assisting in undergraduate mathematics courses, fostering analytical thinking and quantitative skills in students.
Discover over 15,000 top freelancers
Statistics of experts using Haskell
Aggregated from the professional profiles of matched freelancers.
Experience
17 years
Position duration
2.4 years
Positions per freelancer
10
Top business areas
Information Technology, Product Development, Research and Development
Top industries
Information Technology, Education, Professional Services
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
100%
Master's degree or higher
65%
Doctorate
12%
Certifications per freelancer
2
Most common languages
English, German, French
Speak two or more languages
100%
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 Germany 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 Germany using Haskell
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
Functional Core
Haskell is used for software that needs strong correctness, clear logic, and careful control over side effects. Companies use it for backend services, domain-heavy systems, compilers, and data processing jobs where a pure functional style helps keep behavior predictable. It is a fit when the codebase must stay maintainable over time.
Ecosystem
The Haskell stack usually centers on GHC, Cabal, and Stack. Strong specialists work with libraries for web services, parsing, serialization, concurrency, and testing. They also know how to read type errors, shape modules well, and keep builds stable across environments.
Typical Work
- Build APIs and internal services
- Refactor legacy Haskell code
- Design domain models and types
- Add tests and property-based checks
- Improve builds, packaging, and CI
When to Bring in Help
Companies bring in freelance Haskell experts when a project stalls on type complexity, performance tuning, or hard-to-review functional design. They are also useful for short delivery bursts, code reviews, and rescue work on mature systems. In Germany, remote collaboration is common, but on-site work can help when teams need close pairing on a critical platform.
What Strong Experts Do
A good specialist writes small, explicit functions and uses the type system to prevent bugs before runtime. They balance purity with practical integration points, handle concurrency with care, and keep code easy to test. They should be comfortable discussing tradeoffs, not just syntax.
Signs of Fit
If your team needs safer changes in a core backend, a parser, a compiler, or a data pipeline, Haskell is often the right tool. Look for experts who can explain GHC features, manage dependencies cleanly, and turn abstract business rules into clear types. They should leave behind code that is precise, readable, and easy to extend.
Frequently asked questions
Need clarity? These are the questions we hear most often about Haskell.
Haskell is commonly used for backend services, compilers, parsers, finance tooling, and data-heavy systems that benefit from strong static typing. It fits projects where correctness, maintainability, and clear business rules matter more than quick-and-dirty delivery.
Haskell is usually chosen when teams want a very strong functional style and a powerful type system. Compared with Scala, it is more purely functional; compared with OCaml, it often has a larger emphasis on type-level expressiveness; compared with Rust, it focuses less on systems-level ownership and more on elegant domain modeling.
A strong Haskell specialist usually knows GHC, Cabal, and Stack, plus testing tools and common libraries for web, parsing, and serialization. Many projects also need skill with property-based testing, dependency management, and CI setup.
Haskell projects with a small, well-bounded task may only need a specialist for reviews or a focused implementation step. Large legacy systems, complex type work, or performance-sensitive services usually need someone who has shipped Haskell in production and can guide design choices.
Yes. Haskell work is often well suited to remote collaboration because most tasks are code, review, and design focused. For teams in Germany, remote is common, though some companies prefer on-site sessions for architecture workshops or intensive pairing.
Ask which parts of Haskell they have built themselves, how they approach type design, and how they test behavior. It also helps to ask about GHC, build tooling, and how they handle legacy code or unclear requirements.
Look for clear explanations, careful use of types, and code that is easy to test and extend. A strong Haskell expert should be able to simplify a problem, not just add advanced language features.
Haskell can be an excellent choice for APIs and internal systems when the domain is complex and mistakes are costly. It is less about fast prototype churn and more about building a codebase that stays reliable as rules grow.
The average hourly rate of freelancers in Germany who have used Haskell in their recent projects is 99 €, which corresponds to a daily rate of about 794 € based on an 8-hour working day.
Of the freelancers in Germany who have used Haskell in their recent projects, 100% hold at least a Bachelor's degree, 65% hold at least a Master's degree, and 12% hold a doctorate.
On average, freelancers in Germany who have used Haskell in their recent projects have 17 years of professional experience, with a single engagement typically lasting around 2.4 years.
The most common languages among freelancers in Germany who have used Haskell in their recent projects are English (100%), German (94%), and French (22%).
The most common industries among freelancers in Germany who have used Haskell in their recent projects are Information Technology (94%), Education (50%), and Professional Services (44%).
The most common business areas among freelancers in Germany who have used Haskell in their recent projects are Information Technology (94%), Product Development (89%), and Research and Development (67%).
Main locations of FRATCH Experts, who have recently used Haskell
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 Dortmund Essen Bremen Dresden Hanover Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
