Website developer in Luxembourg under business permit 10077275 / 3

Direct answer

A website developer in Luxembourg is not a regulated profession and carries no protected title. Mickaël LOC delivers web development as a commercial service under business permit 10077275 / 3, whose official wording covers auxiliary commercial activities and services, verifiable on Guichet.lu. The sites are built for professional-service and regulated businesses: accounting, legal, construction, technology. Each one carries claims that can be verified, a legal notice and a privacy notice under the GDPR, French, English and German versions, structured data and lead measurement. Thirteen live projects are referenced on the work page, built with Next.js and deployed on Vercel.

Key facts

Basis: Commercial service under business permit 10077275 / 3 (auxiliary commercial activities and services), issued 25/03/2025. No professional title claimed
Who it is for: Accounting, legal, construction, technology and other professional-service firms in Luxembourg
Languages: French, English and German versions with hreflang, planned from the start rather than translated afterwards
Compliance: Legal notice, privacy notice and consent handled under the GDPR (Regulation 2016/679, supervised by the CNPD); claims written to be verifiable
Measurement: Leads counted as requests received, meetings held and files opened, not as traffic
Track record: 13 projects shipped across 8 sectors, built with Next.js and deployed on Vercel, listed with live links on the work page
Firm: Engagements are contracted through Financial Services Luxembourg, RCS B213987, established 2017
Public reference: Business permit No. 10077275, nine activities, verifiable on Guichet.lu
Last verified: 8 October 2026

Business permit · official record

What business permit 10077275 / 3 authorises. Official wording in the public register: “Activités et services commerciaux — activités auxiliaires telles que prévues à l'article 1 de la loi du 10 juin 1999 portant organisation de la profession d'expert-comptable”. In English, the Luxembourg business permit (autorisation d'établissement, Niederlassungsgenehmigung) is the authorisation required under the amended law of 2 September 2011 to carry out a commercial, craft or liberal activity. It is granted by the Ministry of the Economy to a named person who must direct the business in a real, effective and permanent way. Issued 25/03/2025. Personal and revocable.

What a professional firm needs from a website

A regulated or professional-service firm has three readers, not one. The client reads to decide whether to call. The authority or the professional body reads to check that the firm claims only what it is entitled to claim. The counterparty, the bank or the buyer reads to verify a name, a number and an authorisation before a meeting. A site written for the first reader alone is a liability in front of the other two.

The consequence is a different build standard. Every claim on the site must be sourced or flagged. The legal notice must identify the publisher, the firm and its registration. The privacy notice must describe the processing honestly, and the consent mechanism must be real. Service pages must describe the perimeter of the activity, including what the firm does not do. For a Luxembourg firm this usually also means three languages, because clients, administrations and staff do not all read the same one.

I came to web development from the other side of the desk. I hold a business permit for accounting and auxiliary commercial services, I have read the legal notices, engagement letters and authorisations of my own firm, and I know which sentence a regulator or a buyer checks first. This site is built on that standard, and so are the sites on the work page.

Verifiable, fast, multilingual: the build standard

Each site is delivered against the same checklist, whatever the sector.

Verifiable claims. Numbers, titles and authorisations are sourced or flagged, following the same editorial rule as this site. A claim the firm cannot prove is removed before launch, not after a complaint.
Legal and privacy pages. Legal notice, privacy notice and consent handling under the GDPR, drafted from a structured template and submitted to the firm's legal adviser for validation.
Three languages. French, English and German versions with correct hreflang, each reviewed by the firm before publication. The site structure handles the three from day one.
Structured data. Organisation, service, FAQ and breadcrumb markup on every page, so that search engines and answer engines can read what the firm is and does.
Measured performance. Pages checked for a unique title, a meta description, a single H1 and a declared language, then measured with Lighthouse. A score is shown only when a run has been made.
Measured leads. Forms and calls are tracked so that the firm knows which page produced which request. Traffic without a request is not a result.

The stack is Next.js, built and deployed on Vercel, which is what the thirteen live projects use. The firm owns the domain, the code and the accounts; the handover is documented.

How a site is built, from brief to measurement

Step 01

Brief and compliance read

What the firm is authorised to do, which titles it holds, which languages it needs, who signs the content. The perimeter is written down before a page is designed.

authorisations · titles

Step 02

Architecture and content

Positioning line, service pages, FAQ and legal pages written with the firm. Every number has a source. The three language versions are planned together.

FR · EN · DE

Step 03

Build and launch

Next.js build, structured data, redirects where a site already exists, Lighthouse run, launch checklist signed by the firm.

Next.js · Vercel

Step 04

Measurement

Forms, calls and files opened are tracked and reported monthly. Positioning is reviewed quarterly against the requests actually received.

leads · report

When a site already exists, the rebuild starts with an inventory of its URLs and of the pages that bring requests. A one-to-one redirect map is written before anything is moved. Rankings are never guaranteed, but losing them by omission is avoidable, and that is the part I take responsibility for.

Three typical situations

Most requested

01 · Site

Site for a professional firm

Accounting, legal, construction and technology firms with no site, or a site that describes without qualifying.

Architecture, positioning and service pages written with the firm
French, English and German versions with hreflang
Legal notice, privacy notice and consent under the GDPR
Structured data, lead forms and tracking

Project feeFixed in writing after the brief and the compliance read.

02 · Rebuild

Rebuild or migration with SEO continuity

Firms with an existing site whose pages and rankings must survive the move.

Inventory of URLs and of the pages that bring requests
One-to-one redirect map written before the move
Content migrated, corrected and sourced
Launch checklist and post-launch check

Project feeQuoted after the existing site has been crawled, never before.

03 · Care

Monthly care and measurement

Firms that want the site maintained, updated and measured without an internal team.

Updates, security and dependency maintenance
Content changes within a monthly budget
Lead report: requests, meetings, files opened
Quarterly review of positioning against the requests received

Monthly feeScope and hours fixed in writing.

Why a compliance reader builds better sites

Most agencies write what sells. A regulated firm can only publish what it can prove. Having read the authorisations, the legal notices and the engagement letters of my own firm, I know which sentence a regulator or a buyer will check first, and I write the site so that it survives the check.

What my business permit covers, and what stays outside

Step

What is delivered

Basis

Website build, rebuild, migration, monthly care

coveredDesign, build, deployment and maintenance of the site, delivered as a commercial service.

Business permit 10077275 / 3 · auxiliary commercial activities and services

Content on accounting, corporate and compliance subjects

coveredService pages and FAQ written with the firm, by someone who practises the subject; signed off by the firm before publication.

Engagement letter · content approved by the firm

Professional title of “web developer”

partialNo specific title exists in Luxembourg for web development and none is claimed. The service is commercial, and its perimeter is written into the contract.

Not a named activity · perimeter in the engagement letter

Hosting, domain, third-party services

partialContracted in the client's name; I configure and document them, the client owns them.

Client contracts with the providers

Legal advice on terms, privacy notices, consumer law

outsideThe legal notice and privacy notice are drafted from a template and must be validated by a legal professional before use.

Separate regulated profession

Paid advertising, press relations, social media management

outsideNot delivered. The site is built to be measured; campaigns stay with the client or a specialist.

Outside the engagement

What I do not accept

A page that claims a title, an authorisation or a result the firm cannot prove.
A site launched without a legal notice and a privacy notice.
A migration without a redirect map, however urgent the launch.
Content copied from a competitor, or generated and published without review by the firm that signs it.
A fee quoted before the brief and, for a rebuild, before the existing site has been crawled.

Start with the NDA

Document · Mutual NDA · Luxembourg law

Confidentiality agreement before any engagement

To be signed before any name, structure, asset or counterparty is discussed. Readable online, or downloadable as a PDF to return signed.

Download the NDA (PDF)Read online

Draft subject to legal validation. The NDA is a structured template, not legal advice. Its scope and wording must be validated by a Luxembourg legal professional before use.

Search intents covered by this page

IntentWebsite developer LuxembourgSites for professional-service firms, delivered under a business permit Luxembourg's public register lists.IntentWeb developer for professional services LuxembourgAccounting, legal, construction, technology: thirteen live projects.See the projects →IntentSEO website for an accounting, legal or construction firmVerifiable claims, FR/EN/DE, structured data, measured leads.IntentBusiness website Luxembourg business permit holderWhat permit 10077275 / 3 covers for web development, and what it does not.Authorisations →

Business permit certificates to download (PDF)

Each certificate is the official business permit issued by the Ministry of the Economy, with its QR code. Scan the QR code with the GouvCheck app, which checks the authenticity and currency of the document.

10077275 / 3

Auxiliary commercial activities and services

Issued 25/03/2025

Download PDF ↓

The business permit is personal and revocable. Public verification: official Guichet.lu register.

Evidence and verification

Every statement on this page that can be verified independently is listed below with its source. Items that cannot yet be verified are flagged and are not presented as facts.

Claim

Evidence

Source

Business permit 10077275 / 3, auxiliary commercial activities and services

verifiableIssued 25/03/2025 by the Ministry of the Economy; listed under gérant Loc, Mickael.

Public register Guichet.lu; certificate below

No professional title claimed for web development

verifiableWeb development is delivered as a commercial service; no specific title is claimed on this site.

This page; business permit 10077275 / 3

GDPR applies to the sites delivered

verifiableRegulation (EU) 2016/679, supervised in Luxembourg by the CNPD.

Regulation 2016/679; CNPD

Financial Services Luxembourg

verifiableAccounting and corporate-services firm established in 2017, RCS B213987.

Luxembourg Business Registers

13 projects shipped across 8 sectors, Next.js on Vercel

declaredListed with live links on the work page; structure snapshots verified against the live pages, Lighthouse scores shown only when measured.

Work

18+ years in accounting, reporting and corporate services

declaredCareer summary on the CV page; employer references available under NDA.

This page follows the site's editorial policy: a statement is either sourced or flagged. Corrections follow the corrections policy. The content is general information, not legal, tax or accounting advice.

Frequently asked questions

Do you need a business permit to build websites in Luxembourg?

Any commercial activity carried out in Luxembourg requires a business permit (autorisation d'établissement, Niederlassungsgenehmigung) under the amended law of 2 September 2011. There is no specific permit or professional title for web development. I deliver it as a commercial service under business permit 10077275 / 3, whose official wording covers auxiliary commercial activities and services, and that permit can be checked by anyone on Guichet.lu.

Are you a web agency?

No. I am one person with a business permit, a defined number of projects a year, and a firm through which the engagements are contracted. The thirteen projects on the work page are the track record. If a project needs a team of designers and developers working in parallel, I say so at the brief.

What does “verifiable” mean for a website?

Every statement that can be checked is sourced, and every statement that cannot be checked yet is flagged as declared rather than presented as fact. Titles, authorisations, years of experience, project counts and client names are the usual problem areas. It is the editorial rule of this site, applied to yours.

Do you build the French, English and German versions?

Yes. The three versions are planned from the start, with correct hreflang between them, and each language version is reviewed by the firm before publication. A site built in one language and translated later usually ends up with broken links, duplicate pages and a legal notice in the wrong language.

Can you rebuild my site without losing my Google rankings?

I can avoid losing them by omission: inventory of the existing URLs, one-to-one redirect map written before the move, content migrated and corrected, launch checklist and post-launch check. I do not guarantee rankings, and nobody honest does. The business permit covers the service, not the search engine.

How do you measure results?

In requests received, meetings held and files opened, attributed to the page that produced them. Forms and calls are tracked, and a monthly report shows the figures. Traffic alone is not a result, and it is not what a professional firm pays for.

Which stack do you use, and who owns the site?

Next.js, built and deployed on Vercel, which is what the live projects use. The firm owns the domain, the code, the hosting account and the analytics. The handover is documented so that another developer can take over without me.

Send the address of your current site, or the brief if there is none.

One message with the firm's activity, its authorisations and the languages needed is enough for a first answer on architecture and calendar. Fees are quoted after the brief and the crawl, never before.

Open a website discussion →

A website developer in Luxembourg who builds for regulated firms.