Packages

Choose your
engagement.

Three productized tracks. Public pricing in USD. Pick the one that matches your timeline; if none fit, the last section covers custom scopes.

Validation MVP
$1,500
5–7 days

For founders with an AI idea who need a working prototype to test with real users this week. Outcome: a live webapp on your domain with one core AI feature, ready for investors or beta testers.

  • Discovery call, scope locked day 1
  • 1 AI feature end-to-end (chat / classification / generation / search)
  • Auth + database (Supabase)
  • Production deploy on custom domain
  • Documented codebase, fully owned by you
  • 14 days post-launch support
Scale MVP
$7,500
4–5 weeks

For post-seed startups or B2B SaaS teams who need a production system handling 1,000 users. Outcome: a multi-tenant production system with observability and cost controls, ready for Series A diligence.

  • Everything in Launch, plus:
  • Multi-tenant + RBAC
  • RAG + agent pipelines with full eval harness
  • Observability (Logfire / OpenTelemetry)
  • Per-tenant cost tracking + rate limiting
  • CI/CD + staging environment
  • 60 days post-launch support + handover walkthrough
01 / COMPARE

Compare engagements

 ValidationLaunchScale
Timeline5–7 days4–5 weeks
Investment$1,500$7,500
Discovery + scope lock
Auth + database
AI features1 (core)5+
Custom domain + deploy
Stripe billing
Eval harness
Multi-tenant + RBAC
Observability
CI/CD + staging
Post-launch support14 days60 days

Validation MVP

$1,500
5–7 days
  • Discovery + scope lock
  • Auth + database
  • AI features1 (core)
  • Custom domain + deploy
  • Stripe billing
  • Eval harness
  • Multi-tenant + RBAC
  • Observability
  • CI/CD + staging
  • Post-launch support14 days

Scale MVP

$7,500
4–5 weeks
  • Discovery + scope lock
  • Auth + database
  • AI features5+
  • Custom domain + deploy
  • Stripe billing
  • Eval harness
  • Multi-tenant + RBAC
  • Observability
  • CI/CD + staging
  • Post-launch support60 days
HOW I WORK · 5 STEPS

From brief to production.

01
Discovery
Free · 30 min

We define scope, success criteria, and deliverables. You leave with a written brief, even if we don't work together.

02
Kickoff
50% deposit

Scope locked in writing. Slack/Linear access. Daily async updates start from day one.

03
Build
Daily updates

Staging URL updated daily. You see real progress, not slide decks.

04
Launch
50% on delivery

Production deploy. Custom domain. Codebase walkthrough video. Full IP transfer on final invoice.

05
Support
14–60 days

Bug fixes, small tweaks, refinement. After that, optional retainer.

03 / TRACK RECORD · VERIFIED

What's actually shipped.

5.0 ★
Rating
Freelancer.com — 100% job success score.
$5k+
Earnings
Verified across freelance engagements.
2
npm packages
@massiangelone — open source, MIT licensed.
2+ years
Engineering
Altesia, Airplay Control — broadcasting & enterprise.
04 / FAQ

Frequently asked.

Nine questions I get most often. If yours isn't here, write me — I'll answer it.

Have you actually shipped this for paying clients, or are the case studies demos?

Honest answer: the projects on this site are portfolio engagements — I built them to production specs, not for paying tenants. The technical work is real: multi-tenant RLS, streaming chat, Gmail OAuth, cost tracking, all measurable in the running demos. What's missing is the messiness of an actual customer relationship — adversarial users, edge-case requests, support tickets at 11pm. I'm transparent about that distinction, here and in proposals. Real client engagements are covered by NDA; references are available on request.

What does fixed-price actually mean?

Scope is locked on day one in a written brief that lists exactly what's in and what isn't. The price doesn't move unless you decide to add scope mid-engagement, in which case I'll come back with a written delta — never a surprise invoice. If something inside the agreed scope takes me longer than I estimated, that's mine to eat.

Who owns the code, and what if I want another developer to take over later?

You own everything. On final invoice payment, full IP transfers to your company — source code, designs, infrastructure config, eval harness, the works. The repository moves to your organization's GitHub. I retain nothing except the right to mention the engagement on this site, and only if you give permission. Handover is built into every timeline: by delivery you have a runnable codebase that any competent Next.js developer can pick up without calling me.

How do we communicate during the project?

Async by default. Daily written updates Monday through Friday — with screenshots and short Loom videos when something needs visual context. One synchronous call per week, thirty minutes. I'm based in Tenerife (GMT+1): clean overlap with European business hours in the morning and US East Coast in the afternoon.

What happens if the project goes wrong or I need to stop midway?

If I deliver something that doesn't match the agreed brief, I fix it on my own time until it does. If you decide to stop midway, on Upwork or Freelancer.com the platform's milestone-based escrow handles it — you pay only for milestones already released and keep everything I've built. On direct contracts, my standard MSA includes a kill-fee of fifteen percent of remaining scope, plus work completed. Either way: no held-hostage repository, no surprise fees.

What kinds of projects do you not take?

Crypto and Web3 projects. Mobile-native apps with deep platform integration (Bluetooth, AR, native ML). Marketing websites without an application layer. Anything that asks me to deceive users at the design level — gambling mechanics, dark patterns, fake urgency.

Why solo? What's the bus-factor answer?

Solo is the multiplier: same person designing, building, deploying, with no agency overhead and no telephone-game between roles. The bus answer: every engagement ships with a written architecture document, a runnable handover, CI that doesn't depend on me, and a CLAUDE.md file that lets any developer or AI assistant pick up where I left off.

Why USD pricing?

Most clients reference USD as baseline. Invoices are issued in EUR at the day-of-invoice ECB rate via SEPA bank transfer (no Stripe fees).

What payment methods do you accept?

SEPA bank transfer or Wise (recommended for non-EU clients). 50% deposit at kickoff, 50% on final delivery. Invoices include EU VAT where applicable.

Custom scope

Need something custom?

Long-term retainer, an existing codebase to harden, or something none of the three tracks describe — write me a paragraph and I'll come back within 48 hours.