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Sergio Cortes

Let's discuss your project

Tell me a little about your project, your team, or the engineering support you're looking for. I'll get back to you within one business day.

Book a call

Pick a time that works — 15 minutes to confirm fit, stack, and timeline.

1

You share context

~7 min

Your team, stack, timeline, and whether you need overflow, a sprint, or a review.

2

I confirm fit and approach

~5 min

We align on scope, availability, and how I'd slot into your delivery — honestly, including if it's not a match.

3

Next steps if we proceed

~3 min

Written scope, B2B contract terms, and start date — or a clear redirect if you need the CTO / MVP offer instead.

Schedule a call with Sergio Cortes

Common questions

Contractor B2B only — remote from Poland, EMEA-friendly hours. I slot into your delivery as senior frontend capacity; I am not open to permanent employment through this page.

No. This is temporary senior frontend help on an existing team and codebase. Strategic product leadership or building from zero is a different offer on the CTO site.

Primarily Next.js (App Router), React, TypeScript, GraphQL, Tailwind. I can work with your design system and CI. I do not build greenfield Express/Nest backends — Next.js server layer and BFF patterns yes.

Yes — common model for software houses. We align on client communication boundaries and IP upfront on the intro call.

Depends on current commitments — often within 1–2 weeks for sprint work. Share timeline on the intro call and I will confirm availability.

No — use CTO / MVP on demand (cto-mvp-on-demand.vercel.app) for founder partnerships, MVP planning, and production rebuilds from zero.