Web professions explained simply: who does what?
Developer, designer, SEO, webmaster, host, writer or AI agent: understand who does what and how to choose the right partner for your web project.

summary13 sections
Developer, designer, SEO consultant, webmaster, host, managed service provider, web writer or AI agent: here is everyone's role and how to build a project without getting lost in the jargon.
Short answer: each web profession answers a different question: the designer works on experience and identity, the developer builds functionalities, the SEO consultant helps you be found, the webmaster maintains and evolves the site, the managed service provider ensures technical operation, the host provides the environment where it runs, the ghostwriter produces content and the AI agent automates certain tasks. For a small business, these roles can be handled or coordinated by a single main contact who understands the entire project.
These needs are different. A person can be very good at designing an interface without being the best placed to manage a server. A developer can build a complex functionality without having the availability or the method necessary to produce all the content. A writer can write a clear article without having to manage site backups or updates.
Professions have therefore specialised to address each part of the project. This specialisation is useful, but it can give the impression that you need to recruit an entire team to launch or improve a site. In reality, the most important thing is to know which roles are necessary, at what time, and who ensures consistency between them.
We often distinguish between the front-end, which concerns what the visitor sees and uses in their browser, and the back-end, which concerns logic, data, accounts, processing and connections with other systems. In small structures, the same person may work on several parts.
The developer doesn't just "make a feature work". Good development must also remain maintainable, secure, fast enough and adapted to the real level of complexity of the project. For a small business, this avoids paying for a disproportionate architecture or depending on a stack of solutions that are impossible to evolve.
Contact if: the site needs to integrate a specific functionality, connect to a business tool, fix a technical problem or evolve beyond simple content.
The UI designer focuses more on the visible interface: components, screens, typography and graphic details. The UX designer is more interested in the experience: what the visitor is looking for, the steps they must follow and the obstacles that might prevent them from finding information or making contact. In practice, these dimensions complement each other.
For a tradesperson or a small business, the design must above all help the visitor to quickly understand the offer and build trust. A spectacular but confusing site does not fulfil its role any better than a sober and well-organised one.
Contact if: the site no longer reflects the company's level, feels dated, lacks consistency or makes the journey difficult to understand.
SEO is not just about placing a keyword several times in a text. It can involve page architecture, titles, content, internal links, performance, structured data, technical errors, external links and results analysis. The priority depends on the site and the business: a local company doesn't necessarily have the same needs as an e-commerce site or a software publisher.
The SEO consultant must also link visibility to a concrete objective. Being first for a search that produces no contact is not necessarily a success. The right indicator might be a quote request, a call, an appointment booking or a qualified visit.
Contact this professional if: the site has low visibility, if traffic doesn't match the targeted customers or if the company wants to develop regular content without publishing at random.
The term covers different realities depending on the company. Some webmasters are very content-oriented, others more technical. In all cases, their value often lies in continuity: someone knows the site, its history, its priorities and the small improvements that prevent problems from accumulating.
For a small business, the webmaster can represent a significant time saving. The manager doesn't need to look for a different provider for every simple modification nor reset the entire context for every request.
Contact if: the site needs to be updated regularly, if requests are piling up or if no one is clearly responsible for its monitoring.
Their work often remains invisible when everything is going well. However, a breakdown, a bad configuration or an unusable backup can interrupt business and make repairs much more expensive. Managed services are therefore as much about prevention as they are about repair.
The MSP should not be confused with the webmaster. The webmaster works more on the site and its content; the MSP watches over the technical platform that allows the site to remain available and exploitable. Depending on the project size, these two responsibilities can be handled by the same team.
Contact if: the site experiences outages, if backups are not clear, if access is scattered or if the company wants to reduce technical risks.
Choosing hosting is not about taking the cheapest offer. You need to look at availability, backups, security, performance, data location, support quality and the ability to evolve the environment. The need for a simple showcase site is not the same as for a business application or a client area.
The host provides the environment; they do not always take charge of the detailed configuration of the site, its updates or its backup strategy. This is why hosting and managed services are often complementary.
Contact if: the company is creating a site, changing providers, looking to reduce downtime or wants to check that its hosting really matches its activity.
A good web writer doesn't just string sentences together. They must understand the audience, the industry vocabulary, the search intent, the brand tone and the action the content should encourage. They transform internal expertise into understandable text for someone who doesn't know the company yet.
Ghostwriting is particularly useful when the manager has a lot to say but no time to structure, write and publish regularly. The content remains based on their expertise; the writer helps to make it clear, useful and consistent.
Contact if: the site lacks content, if pages don't speak enough to customers or if ideas stay in a notebook for lack of time to write them.
The value doesn't come from the word "AI" itself. You have to start from a repetitive need, define the data the agent can access, plan the necessary checks and know when a person must take over. Poorly framed automation can save a few seconds while creating new errors.
In a small business, the AI agent can complement the work of the manager or the team: it doesn't automatically know the trade, the commercial limits or the commitments made to customers. It must be designed around a precise use and remain controllable.
Contact if: certain tasks recur often, follow identifiable rules and take time without systematically requiring a complex human decision.
Cadarsir takes on or coordinates these different roles according to needs: project framing, design, development, content, SEO, webmastering, maintenance, hosting and technical environment, with uses of AI agents when it brings a real benefit. The goal is not to pretend that one profession replaces all others, but to offer a manager who understands the links between them.
This approach is particularly suited to entrepreneurs, tradespeople and SMEs who need a professional site without setting up their own digital department. The level of support can evolve: creation or redesign, ongoing monitoring, content production, SEO improvement, maintenance and targeted automation.
A single contact doesn't mean everything is done in isolation. It means the project has a clear coordination point, that choices are explained without unnecessary jargon and that decisions remain linked to the business.
The developer builds, the designer clarifies, the SEO consultant makes visible, the webmaster maintains, the MSP secures the environment, the host provides the platform, the ghostwriter gives a voice to content and the AI agent automates certain tasks. These roles each have their use, but they produce more value when they are linked by a common vision.
For a small business or an SME, the challenge is therefore not to become a specialist in every trade. It is to find support capable of explaining choices, mobilising the right skills and remaining responsible for the consistency of the result.
With Cadarsir, the goal is to allow you to move forward with a single contact for your site, your visibility, your content and your evolutions, in an offer that is accessible and adapted to the reality of your business.
Short answer: each web profession answers a different question: the designer works on experience and identity, the developer builds functionalities, the SEO consultant helps you be found, the webmaster maintains and evolves the site, the managed service provider ensures technical operation, the host provides the environment where it runs, the ghostwriter produces content and the AI agent automates certain tasks. For a small business, these roles can be handled or coordinated by a single main contact who understands the entire project.
Why are there so many web professions?
A website is not just a page with a logo, some text and a form. To be truly useful, it must be understandable, pleasant to consult, technically solid, visible in search engines, regularly maintained and capable of evolving with the business.These needs are different. A person can be very good at designing an interface without being the best placed to manage a server. A developer can build a complex functionality without having the availability or the method necessary to produce all the content. A writer can write a clear article without having to manage site backups or updates.
Professions have therefore specialised to address each part of the project. This specialisation is useful, but it can give the impression that you need to recruit an entire team to launch or improve a site. In reality, the most important thing is to know which roles are necessary, at what time, and who ensures consistency between them.
1. The web developer: building and running the site
The web developer transforms an idea or a mockup into a functional site. They write and organise the code that allows pages to be displayed, forms to be managed, tools to be connected, client areas to be created or multiple services to communicate.We often distinguish between the front-end, which concerns what the visitor sees and uses in their browser, and the back-end, which concerns logic, data, accounts, processing and connections with other systems. In small structures, the same person may work on several parts.
The developer doesn't just "make a feature work". Good development must also remain maintainable, secure, fast enough and adapted to the real level of complexity of the project. For a small business, this avoids paying for a disproportionate architecture or depending on a stack of solutions that are impossible to evolve.
Contact if: the site needs to integrate a specific functionality, connect to a business tool, fix a technical problem or evolve beyond simple content.
2. The web designer: making the site clear, credible and pleasant
The web designer works on how the site is perceived and used. Their role is not just about choosing pretty colours. They think about information hierarchy, user journeys, contrasts, spacing, buttons, images and consistency with the company's identity.The UI designer focuses more on the visible interface: components, screens, typography and graphic details. The UX designer is more interested in the experience: what the visitor is looking for, the steps they must follow and the obstacles that might prevent them from finding information or making contact. In practice, these dimensions complement each other.
For a tradesperson or a small business, the design must above all help the visitor to quickly understand the offer and build trust. A spectacular but confusing site does not fulfil its role any better than a sober and well-organised one.
Contact if: the site no longer reflects the company's level, feels dated, lacks consistency or makes the journey difficult to understand.
3. The SEO consultant: helping the right visitors find you
The SEO consultant — for Search Engine Optimization — works on the site's organic visibility. They seek to understand what potential customers are typing, which pages answer those searches and what might prevent the site from being correctly understood by search engines.SEO is not just about placing a keyword several times in a text. It can involve page architecture, titles, content, internal links, performance, structured data, technical errors, external links and results analysis. The priority depends on the site and the business: a local company doesn't necessarily have the same needs as an e-commerce site or a software publisher.
The SEO consultant must also link visibility to a concrete objective. Being first for a search that produces no contact is not necessarily a success. The right indicator might be a quote request, a call, an appointment booking or a qualified visit.
Contact this professional if: the site has low visibility, if traffic doesn't match the targeted customers or if the company wants to develop regular content without publishing at random.
4. The webmaster: keeping the site alive daily
The webmaster is the operational point of contact for the site. They can publish a page, update content, modify a form, check links, track statistics, coordinate a fix or report a risk before it becomes a blocker.The term covers different realities depending on the company. Some webmasters are very content-oriented, others more technical. In all cases, their value often lies in continuity: someone knows the site, its history, its priorities and the small improvements that prevent problems from accumulating.
For a small business, the webmaster can represent a significant time saving. The manager doesn't need to look for a different provider for every simple modification nor reset the entire context for every request.
Contact if: the site needs to be updated regularly, if requests are piling up or if no one is clearly responsible for its monitoring.
5. The managed service provider: monitoring the technical environment
The managed service provider (MSP) looks after the IT environment in which the site operates. They can work on servers, systems, access, security, backups, supervision, infrastructure updates and incident resolution.Their work often remains invisible when everything is going well. However, a breakdown, a bad configuration or an unusable backup can interrupt business and make repairs much more expensive. Managed services are therefore as much about prevention as they are about repair.
The MSP should not be confused with the webmaster. The webmaster works more on the site and its content; the MSP watches over the technical platform that allows the site to remain available and exploitable. Depending on the project size, these two responsibilities can be handled by the same team.
Contact if: the site experiences outages, if backups are not clear, if access is scattered or if the company wants to reduce technical risks.
6. The host: providing the place where the site is installed
The host provides the space and resources that allow the site to be accessible online. They provide servers, storage, network connection and different levels of service according to the chosen plans.Choosing hosting is not about taking the cheapest offer. You need to look at availability, backups, security, performance, data location, support quality and the ability to evolve the environment. The need for a simple showcase site is not the same as for a business application or a client area.
The host provides the environment; they do not always take charge of the detailed configuration of the site, its updates or its backup strategy. This is why hosting and managed services are often complementary.
Contact if: the company is creating a site, changing providers, looking to reduce downtime or wants to check that its hosting really matches its activity.
7. The ghostwriter or web writer: giving the site a voice
The ghostwriter writes for a person or a company without necessarily appearing as the public author of the content. On the web, they can write service pages, blog articles, newsletters, posts or content intended to strengthen a leader's credibility.A good web writer doesn't just string sentences together. They must understand the audience, the industry vocabulary, the search intent, the brand tone and the action the content should encourage. They transform internal expertise into understandable text for someone who doesn't know the company yet.
Ghostwriting is particularly useful when the manager has a lot to say but no time to structure, write and publish regularly. The content remains based on their expertise; the writer helps to make it clear, useful and consistent.
Contact if: the site lacks content, if pages don't speak enough to customers or if ideas stay in a notebook for lack of time to write them.
8. The AI agent: automating certain tasks without replacing the profession
An AI agent is software capable of using an artificial intelligence model to perform a task or a sequence of tasks within a defined framework. It can, for example, help qualify a request, prepare a response, summarise an exchange, classify information, feed a FAQ or trigger an action according to rules.The value doesn't come from the word "AI" itself. You have to start from a repetitive need, define the data the agent can access, plan the necessary checks and know when a person must take over. Poorly framed automation can save a few seconds while creating new errors.
In a small business, the AI agent can complement the work of the manager or the team: it doesn't automatically know the trade, the commercial limits or the commitments made to customers. It must be designed around a precise use and remain controllable.
Contact if: certain tasks recur often, follow identifiable rules and take time without systematically requiring a complex human decision.
How do these professions work together?
A web project rarely moves in a straight line. The business need influences the architecture; the architecture influences the content; the content influences the journeys and SEO; going live then creates needs for maintenance, monitoring and improvement.- Understand the need: target, activity, offer, constraints, objectives and priorities.
- Organise the project: sitemap, journeys, content, functionalities and technical choices.
- Design the experience: identity, interface, messages, calls to action and accessibility.
- Build and integrate: development, content, forms, tools and hosting environment.
- Go live and monitor: tests, SEO, backups, maintenance, measurement and improvements.
Which partner to choose according to your need?
- You are starting from scratch and don't know where to begin: a partner capable of framing the project and identifying the necessary roles.
- The site is pretty but doesn't generate enough requests: an SEO consultant or a specialist capable of analysing content, journeys and conversion.
- The site is difficult to modify or accumulates errors: a webmaster or developer who can diagnose the existing setup and secure evolutions.
- You want to publish but lack time: a webmaster, a web writer or a ghostwriter depending on the need.
- You fear outages, data loss or scattered access: a technical lead who masters hosting, backups and managed services.
At Cadarsir, a single contact can combine these roles
For an entrepreneur, the difficulty is not just finding a good developer or a good writer. It's knowing who to call, repeating the project context and checking that every contributor is moving in the same direction.Cadarsir takes on or coordinates these different roles according to needs: project framing, design, development, content, SEO, webmastering, maintenance, hosting and technical environment, with uses of AI agents when it brings a real benefit. The goal is not to pretend that one profession replaces all others, but to offer a manager who understands the links between them.
This approach is particularly suited to entrepreneurs, tradespeople and SMEs who need a professional site without setting up their own digital department. The level of support can evolve: creation or redesign, ongoing monitoring, content production, SEO improvement, maintenance and targeted automation.
A single contact doesn't mean everything is done in isolation. It means the project has a clear coordination point, that choices are explained without unnecessary jargon and that decisions remain linked to the business.
No. Some projects require very specialised expertise, but a small business can often entrust the framing and coordination to a main contact. This person takes on the roles suited to the project and brings in a specialist when relevant.
Conclusion: the right profession is the one that solves the right problem
Web professions are not a collection of complicated titles. They correspond to concrete needs: being understood, being found, functioning correctly, remaining available, publishing, evolving and saving time.The developer builds, the designer clarifies, the SEO consultant makes visible, the webmaster maintains, the MSP secures the environment, the host provides the platform, the ghostwriter gives a voice to content and the AI agent automates certain tasks. These roles each have their use, but they produce more value when they are linked by a common vision.
For a small business or an SME, the challenge is therefore not to become a specialist in every trade. It is to find support capable of explaining choices, mobilising the right skills and remaining responsible for the consistency of the result.
With Cadarsir, the goal is to allow you to move forward with a single contact for your site, your visibility, your content and your evolutions, in an offer that is accessible and adapted to the reality of your business.



