Engagement Terms

Last updated: September 18, 2026

These terms describe how I contract, deliver and invoice engineering work. They apply to all services offered on this site unless a signed contract with a client states otherwise.

1. Who you are contracting with

I contract as an independent business (B2B). I am not an employee, agent or representative of any client, and no engagement creates an employment relationship, partnership or joint venture.

2. How I work

• Own resources. I supply my own computer equipment, development tooling and software licences. I do not depend on client-provided workplace infrastructure beyond the access strictly required to deliver the agreed scope (e.g. repository and environment credentials).
• No subordination. Clients define what is to be achieved — the objective, scope and acceptance criteria. I decide how it is achieved: technical approach, tooling, sequencing and working method. I do not receive or issue binding instructions of the kind an employer issues to an employee.
• No exclusivity. I run several client engagements in parallel and remain free to take on new clients at any time during an engagement.
• Substitution. Where a contract permits it, I may perform work with the support of my own subcontractors, remaining fully responsible to the client for the result.

3. Engagement model

Every engagement is defined before it starts and records, as a minimum: the scope of work, the deliverables, the acceptance criteria, the milestone schedule, the fee and the end date. Work outside the agreed scope is handled as a separate, separately priced change.

Engagements are outcome-based. I am paid for delivered and accepted results, not for time spent being available.

4. Deliverables and acceptance

Deliverables are handed over at the milestones set out in the contract. The client has an agreed review window to accept a deliverable or report defects against the acceptance criteria. Silence past the review window counts as acceptance.

5. Fees and invoicing

Fees are agreed per engagement — fixed price per milestone, fixed price per deliverable, or a capped project fee. I invoice from mackan.it Maciej Kankowski against accepted milestones. Standard payment term is 14 days from the invoice date unless agreed otherwise. Prices are net; VAT is added at the applicable statutory rate.

6. Warranty, risk and liability

• 6.1 Warranty. I warrant that accepted deliverables conform to the agreed acceptance criteria.
• 6.2 Remediation at my cost. Defects reported within the warranty period are corrected at my own expense and in my own time.
• 6.3 Economic risk. I bear the economic risk of my work: fixed-price work that takes longer than estimated is not re-billed, and rework caused by my error is not chargeable.
• 6.4 Cap. Unless mandatory law provides otherwise, my aggregate liability under an engagement is limited to the fees paid under that engagement.

7. Intellectual property

Economic copyright in deliverables created specifically for a client transfers to that client upon full payment for the relevant milestone, on the fields of exploitation set out in the contract. I retain rights to pre-existing components, generic tooling and know-how developed independently of the engagement, and grant the client a licence to use them as embedded in the deliverables.

8. Confidentiality

Client information disclosed to me is kept confidential and used solely to deliver the engagement. Client names on this site are generalised by industry where an NDA is in force.

9. Term and termination

Engagements run for the term set out in the contract. Either party may terminate on the notice period agreed there. On termination, accepted and delivered work is invoiced and paid; no notice-period entitlement, severance, leave compensation or comparable employment-type benefit arises.

10. Governing law

Polish law applies. Disputes are subject to the court having jurisdiction over my registered seat, unless the contract provides otherwise.

11. Contact

Questions about these terms: use the contact details on the homepage. See also the Privacy & Cookie Policy.