Are you looking for a TYPO3 freelancer or developer for your challenging TYPO3 projects? Then I’m the person for you. My key strengths include my certification as a TYPO3 CMS Certified Developer and TYPO3 CMS Certified Integrator, my ability to grasp concepts quickly, and my skill as a freelancer in understanding both your requirements and those of your clients. In my role as a TYPO3 developer, I will meet these requirements to the best of my ability. I always aim to deliver cleanly developed TYPO3 solutions using FLUID and Extbase, which are easily scalable yet simple for the client to maintain.
My commitment to TYPO3 is also reflected in my Bronze Membership of the TYPO3 Association.
Public Profile auf typo3.org:
https://my.typo3.org/u/marcelmarty
As a certified TYPO3 developer with Bronze Member status, I have been carrying out complete relaunches and building new, sophisticated websites for over 20 years. From concept development and user experience analysis through to technical implementation, testing and going live – I will support your project comprehensively and transparently.
I begin with a detailed analysis of your existing website, business objectives and target audiences. My TYPO3 websites are GDPR-compliant (where necessary), performance-optimised and built using modern front-end technologies. From small business websites to complex enterprise CMS solutions – I create bespoke websites that are tailored precisely to your needs.
For companies with multiple websites, subsidiaries or product lines, I implement scalable TYPO3 multisite solutions based on a single central instance. You can manage all websites from a single backend using consistent standards and shared extensions – this significantly reduces maintenance costs.
My multisite architectures allow for customisation of each site, whilst central functions such as user management, extension updates and performance optimisations are shared. Each site can have its own design, content structures and language configurations. I develop solutions for international corporate websites, product websites and e-commerce sites. My architectures are scalable, performance-optimised and compatible with modern deployment strategies.
I carry out professional TYPO3 upgrades to the latest version and ensure that your website remains technically sound, secure and future-proof. This includes analysing the existing installation, checking for compatibility, customising templates, extensions and configurations, and conducting comprehensive testing before and after the update.
This allows you to benefit from enhanced security, improved performance, more stable system operations and a solid TYPO3 foundation for further enhancements, content customisation and SEO measures. A well-planned upgrade reduces technical risks, improves maintainability and ensures that your website continues to run reliably and efficiently even after a major version upgrade.
I seamlessly integrate third-party systems, APIs and external data sources into your TYPO3 website and ensure that all systems communicate reliably with one another. This includes connecting CRM systems to synchronise customer data, newsletter tools for automated campaigns, ERP and accounting systems for product and order data, and PIM systems for the centralised management of your product information.
Customised interfaces to internal applications or external platforms can also be implemented flexibly, for example via REST, JSON, XML or other suitable exchange formats. The aim is to achieve a stable, secure and maintainable integration in which data is transferred correctly, processes are automated and manual tasks are reduced. In this way, TYPO3 becomes the central platform for your web communications and your system landscape, where content, customer data and business processes interlock seamlessly.
A well-designed integration with third-party systems creates genuine long-term added value, as information can be utilised consistently, in real time and without any data disconnects. This makes processes more efficient, transparent and scalable, which is particularly crucial in the context of expanding system landscapes and data-intensive processes.
Where technically feasible, I will handle the complete migration of CMS systems to TYPO3 – ensuring that all content data, structural information, metadata, user accounts and SEO settings are preserved without any loss of data.
I develop a bespoke migration strategy and use automated migration tools combined with manual quality assurance. The migration includes content transfer, structural migration, user migration, SEO migration (URLs, meta tags, redirects), implementation of extensions for functionality, performance optimisation and comprehensive testing phases prior to going live.
Following the migration, I offer support and long-term maintenance. Thanks to my professional migration experience, you can switch to TYPO3 securely, completely and without any problems.
I develop custom TYPO3 extensions that are precisely tailored to your functional requirements and enhance your website with specific features. Whether it’s custom front-end or back-end functionality, complex workflows, automated data processing, specialised form logic or the extension of existing modules: the development is cleanly structured, maintainable, updatable and designed for long-term stability.
This provides you with a TYPO3 solution that integrates flexibly into your existing system landscape, remains technically transparent and can be efficiently developed further to meet future requirements. Custom extension development is particularly useful when standard solutions reach their limits and a precise, scalable implementation is required.
Before and after a TYPO3 upgrade, I carefully check your extensions for compatibility, functionality and any potential technical conflicts. Not every extension is automatically compatible with the latest version of TYPO3, which is why I analyse dependencies, deprecated functions, interfaces, data structures and any necessary adjustments at an early stage and in a systematic manner.
This will help you minimise downtime, avoid errors during live operation and ensure that your TYPO3 website continues to run smoothly, efficiently and is future-proof following the update. A thorough compatibility check is a key component of any professional TYPO3 project, as it reduces follow-up costs and safeguards the technical quality of your installation in the long term.
I develop websites in TYPO3 based on existing layouts and designs – for example, from Figma, Adobe XD or other design tools – and convert your templates into a clean, high-performance and responsive website structure. In doing so, I ensure a pixel-perfect, technically precise implementation that delivers excellent results both visually and in terms of day-to-day maintenance.
In addition, I take into account structure, usability, semantics, loading times, mobile optimisation and SEO-related aspects, so that your website not only looks good, but can also be found, maintained efficiently and expanded effectively in the long term. Implementation starting from the layout stage is particularly suitable when design and development need to be closely integrated and a high-quality, consistent end result is expected.
I optimise the accessibility of your TYPO3 website to ensure that content is accessible, understandable and usable for as many people as possible. This includes an improved semantic structure, meaningful alternative text, optimised keyboard navigation, clear contrasts, intuitive navigation patterns and an overall user-friendly design in line with the latest accessibility standards.
An accessible website not only improves the user experience for people with disabilities, but also enhances the overall quality of your website, broadens the reach of your content and supports professional, modern web communication. Accessibility is therefore not just a technical issue, but an important aspect of usability, quality and digital responsibility.
I analyse and improve the performance of your TYPO3 website so that pages load faster, content is delivered more efficiently and users enjoy a noticeably better experience. This includes optimisations relating to caching, image size, code structure, database access, front-end resources and technical processes running in the background.
A faster website results in lower bounce rates, a better user experience on mobile devices and creates better conditions for SEO, conversion optimisation and a strong overall online presence. Performance optimisation is particularly important if your TYPO3 website handles a lot of content, complex functions or a large number of visitors, yet needs to remain fast and stable.
I review quotations and proposals for TYPO3 projects in a professional, structured and transparent manner, so that you can better assess technical services and make informed decisions. In doing so, I evaluate the scope, quality, maintainability, potential risks, technical assumptions and the plausibility of individual items in relation to your requirements.
This enables you to identify more quickly whether a quote is truly suited to your project, whether key services have been taken into account, and whether the price is commensurate with the service provided. A professional review of quotes helps you to avoid making the wrong decisions, allocate budgets more effectively, and ensure that TYPO3 projects are built on a solid foundation right from the start.
TYPO3 extension for AI readiness
So ChatGPT, Perplexity and Google AI find, understand and correctly cite your content
AI readiness means your website is as accessible to AI systems as it is to people — AI accessibility in the literal sense. AI Bridge publishes your TYPO3 content in a format language models can use directly — as an llms.txt to specification and as Markdown for every single page.
That is what raises your AI search visibility: AI crawlers such as GPTBot, ClaudeBot and PerplexityBot find your content, place it correctly and cite it in their answers instead of guessing. A log shows you in black and white who came by and when.
On top of that comes an AI search assistant that answers visitor questions right on the site — citing the pages an answer came from instead of inventing facts.
AI readiness has two sides: AI accessibility — how well AI systems can reach and parse your content in the first place — and the quality of the answers on the site itself. AI Bridge covers both: it prepares your content so language models quote it correctly instead of guessing, and it answers visitor questions on the page before they go back to the search engine.
The extension writes an llms.txt following the llmstxt.org specification — with navigation structure, topics, contact details and description. Served at /.well-known/llms.txt. For AI crawlers it is the direct route through your site.
Appending .md to a page URL returns its content as Markdown — the format ChatGPT, Claude and Perplexity handle most reliably. No navigation, no scripts, no noise.
A backend module shows which AI crawler — GPTBot, ClaudeBot, PerplexityBot and others — fetched which page and when. That is how you see your AI readiness paying off. A rate limiter slows down access that gets out of hand.
A chat window answers visitor questions right on the page. Without an API key it returns matching pages as suggestions; with a key, Claude writes a short answer and names the pages it came from.
The «AI Assistant Log» module shows what visitors asked and where the answer came from — the most reliable source for what your site is still missing.
In the «Corrections» module editors maintain question and answer pairs. A question that matches in meaning is answered verbatim; a looser match is handed to the language model as a binding hint.
The building blocks of AI readiness — llms.txt, the Markdown export and the AI crawler log — are free for good and run without a key. The AI search assistant and its two backend modules are unlocked by a subscription key.
CHF 0 for good
The complete base — no registration, no key, no expiry date.
CHF 29.90 per month
Everything in Free — plus the search assistant on the site and both backend modules, valid for up to two domains.
Billed once a year: CHF 358.80 for 365 days.
The key is issued encrypted and signed and is valid for the domains given when ordering. A term runs for 365 days and renews automatically afterwards. A cancellation that arrives at least 30 days before the end of the current term prevents the next charge; if it arrives later, the upcoming term is still charged and the subscription ends at the end of that term. Price excl. VAT.
I have been working with Marcel Marty for a good four years now. Before that, I worked with a number of other webmasters, some of whom were more convincing than others. Anyone today who is not an expert in programming or the internet and needs a website that is attractive to customers and generates revenue is faced with a multitude of ‘opinions’ on what such a site should be like, which doesn’t make decision-making any easier. I have found my ongoing collaboration with Marcel to be professional and highly reliable. His advice is sound and well-founded. He has always dealt with my requests – which haven’t always been straightforward – promptly and at a fair price, and I can wholeheartedly recommend him as a professional, no-nonsense point of contact.
Marcel Marty has an extremely thorough knowledge of the TYPO3 CMS. I am particularly impressed by his practical and customer-focused approach. Marcel has a solution for every need and request, which is always implemented quickly and without fuss. I greatly appreciate our professional working relationship.
In my collaboration with Marcel, I have come to appreciate three things in particular: he plans very thoroughly, implements his work with technical precision, and always keeps his clients’ needs in mind. His many years of experience and his in-depth technical knowledge prove their worth in every project. Marcel not only works reliably, but also explains clearly what he is doing and why. His solutions are well thought out and sustainable. I can say from my own experience that projects are in good hands with him.
Working with Marcel Marty was an extremely pleasant, inspiring and, above all, highly professional experience! He was always on hand to provide us with very swift and effective solutions and support during the implementation of a TYPO3 website redesign, particularly throughout the entire migration phase, but also afterwards. We’d be happy to work with him again at any time!
Marcel developed a fantastic website for us, complete with a CMS, in no time at all. I was particularly impressed by his quick response to our requests and his clear, open communication throughout the project. His expertise in TYPO3 was exactly what we were looking for.
Very quick response times, highly professional, always friendly and cheerful. We have always been very satisfied with Marcel Marty’s services.
I find working with Marcel to be a very reliable and dedicated experience. He is always quick to respond and helps to resolve any issues straight away. He is also happy to provide information on minor and/or less urgent matters, and is very patient when dealing with queries from clients outside the industry who have limited knowledge of the world of computing.
No matter how intractable the problem, Marcel always finds a creative solution – and does so quickly and flexibly.
Marcel Marty
Schlossmuhlestrasse 218
CH-8408 Winterthur
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