Terms of Use & Legal Notice

This document has two parts. Part A sets out the legal notice (mentions légales) required by French law and the terms for browsing gessli-dev.com (the “Site”). Part B sets out the terms that apply once a client engages Gessli Dev for a project. These terms are written for business clients; nothing here is intended to remove protections a consumer is entitled to under French law.

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01. Company identification

This website is published under the obligations of Article 6-III of French Law No. 2004-575 of 21 June 2004 (LCEN) by:

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02. Nature of business

Principal activity under APE/NAF code 7410Z (specialised design activities), covering custom website design and development, web application development, front-end and back-end engineering, API and backend integration, e-commerce platforms, and CMS implementation. Gessli Dev is not a regulated financial, legal, or accounting adviser and gives no advice of that kind.

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03. Contact details

Enquiries are handled by email at konstantin@gessli-dev.com, with correspondence addressed to the registered address above. As a solo practice, there is no walk-in office and no reception desk — all enquiries go through email, with a reply typically within one business day.

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04. Hosting provider

This website is hosted by a third-party infrastructure provider operating within the European Union or under an appropriate EU data-transfer safeguard. The host provides infrastructure only and has no editorial control over the content of this Site. The current provider's name and registered address are available on request at konstantin@gessli-dev.com.

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05. Use of this website

You may use this Site for lawful purposes only. You agree not to:

• use the Site in any way that violates applicable local, national, or international law or regulation
• attempt to gain unauthorised access to any part of the Site or its underlying infrastructure
• probe, scan, or test the vulnerability of the Site, or introduce malware of any kind
• transmit unsolicited advertising or promotional material through the enquiry form
• scrape or systematically extract content from the Site without prior written permission

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06. Intellectual property in website content

All content on this Site — including text, design, layout, code, and overall visual presentation — belongs to Konstantin Gessli or is used with the rightsholder's permission, and is protected by French and international copyright law. You may not copy, reproduce, distribute, or create derivative works from any part of this Site without prior written consent. Case-study figures shown on this Site are real outcomes from completed engagements; client names are withheld under standard confidentiality terms and no client data appears in any illustrative material.

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07. External links

This Site may contain links to third-party websites, provided for information only. We do not endorse, and take no responsibility for, the content or privacy practices of any third-party site. Linking to the Site's home page is permitted; framing the Site or implying an affiliation without consent is not.

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08. Accuracy of website content

We make reasonable efforts to keep this Site accurate and current, but information on it is general and not guaranteed, and nothing on the Site forms part of a contract. Service descriptions, timelines, and prices shown here are indicative; a binding agreement is governed only by the Terms of Service in Part B and a signed proposal.

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09. Scope of services

Gessli Dev provides custom website design and development, web application development, e-commerce platforms, API and backend integration, CMS implementation, and ongoing support, as described on the Services & Pricing page. The scope of any individual engagement is set only by its signed proposal or statement of work, not by this Site.

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10. Enquiries, quotes and proposals

Submitting an enquiry creates no obligation on either party. A quote is valid for 30 days from the date issued unless another period is stated in writing.

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11. Formation of contract

A binding contract forms only once a written proposal or statement of work is accepted in writing (including by email) and, where applicable, a deposit is received. A client's own purchase-order terms do not apply unless Gessli Dev accepts them in writing.

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12. Client responsibilities

The client is responsible for providing accurate project information, naming a single decision-maker for approvals, giving timely feedback at each review stage, and supplying any licences, accounts, or system access required for the work. Delay in any of these may extend the project timeline and, where significant, may incur additional charges.

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13. Change control

Any change to the agreed scope must be agreed in writing by both parties before work on it begins, along with its effect on timeline and price.

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14. Timescales

Delivery dates are estimates unless the signed proposal states a fixed deadline. Time is not of the essence except where expressly agreed.

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15. Charges and payment

Pricing is fixed-price or milestone-based as set out in the proposal. Invoices are due within 14 days of issue unless otherwise agreed. Late payment may incur statutory interest in accordance with French commercial law (Article L441-10 of the Code de commerce).

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16. Deposits and staged payments

Projects typically require an upfront deposit before work begins, with further payments tied to agreed milestones. A deposit reflects time reserved in the schedule and is non-refundable once work has started, except where required by law.

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17. Acceptance and validation

The client has 10 business days from delivery of a milestone to report any material non-conformity with the agreed specification. A deliverable is deemed accepted if no such report is received within that period, or once the client uses it in a live environment.

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18. Warranties

Gessli Dev warrants that work will be carried out with reasonable care and skill, in line with the agreed specification. Beyond this, no other warranty is given to the extent permitted by French law.

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19. Maintenance and support

Ongoing maintenance and support are not included by default once a project is delivered. Support is available as a separate arrangement with its own defined scope, described on the Services & Pricing page.

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20. Intellectual property in deliverables

Ownership of deliverables is set out in the signed proposal. Unless stated otherwise, rights in custom-built deliverables transfer to the client only on receipt of full payment. Pre-existing tools, components, and internal frameworks used to build the deliverable remain the property of Gessli Dev, and the client receives a licence to use them as part of the delivered project. Open-source components retain their own licence terms.

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21. Portfolio and anonymised references

Gessli Dev may describe completed work, including measurable outcomes, in anonymised form for marketing purposes, as reflected on the Work page. Naming a client, or using their logo or brand, requires the client's prior written consent.

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22. Confidentiality

Both parties agree to keep confidential any non-public information disclosed during an engagement, with standard exceptions for information that is public, independently developed, or required to be disclosed by law. This obligation survives for five years after the engagement ends, and indefinitely for trade secrets.

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23. Limitation of liability

Nothing in these terms limits liability for death, personal injury, fraud, or any other matter that cannot be excluded under French law. Subject to that, liability for indirect or consequential loss is excluded, and total liability arising from an engagement is capped at the fees paid for that engagement in the preceding 12 months.

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24. Suspension and termination

Either party may terminate an engagement on 30 days' written notice, or immediately in the event of an unremedied material breach or insolvency of the other party. Clauses relating to confidentiality, intellectual property, and payment for work already performed survive termination.

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25. Governing law and jurisdiction

This Site and any engagement with Gessli Dev are governed by French law. Disputes are first addressed through good-faith discussion between the parties and, where that fails, submitted to the exclusive jurisdiction of the competent courts of Paris, France, unless mandatory consumer-protection rules in the client's country of residence provide otherwise.

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26. Reporting a concern

To report a concern about this Site, including an intellectual property claim, contact konstantin@gessli-dev.com with a description of the issue, the relevant page or content, and your contact details. We aim to acknowledge reports within 5 business days.

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27. Changes to these terms

These terms may be updated from time to time; the version number and date at the top of this page reflect the latest revision. Continued use of the Site after a change is posted constitutes acceptance of the revised terms. Any engagement already under a signed proposal is governed by the terms in force on the date that proposal was accepted.

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Contact

• Konstantin Gessli
• 8 Rue Edmond Valentin, Appartement 3, 75007 Paris, France
• konstantin@gessli-dev.com