Bonjour.Welcome.Willkommen.Benvenuto.Olá.

Folio — 2026

Currently booking

Zürich, CH

Danilson Ramos —
engineer and product
designer. I build
the first version of
SaaS products.

I work with early-stage founders who need their product built right the first time. Currently booking — one to two projects per quarter.

Email — hello@bynilson.chSee selected work ↓

Reply within 24h, Mon–Fri.

Scroll ↓

47.37°N · 8.54°E

The toolkit — not a skills bar

Next.jsTypeScriptTailwindPostgresStripeResendVercelPythonNext.jsTypeScriptTailwindPostgresStripeResendVercelPython

01 — Work

Selected work.

Project
SponsorsMetrics
Category
Creator Economy · Pricing
Client
Self · product
Year
2026 · Solo build

SponsorsMetrics — the pricing cockpit for YouTube talent agents

A pricing, deal and reporting cockpit for the agents who sell YouTube sponsorships. It benchmarks real FR-market CPM by niche, runs the deal pipeline, and ships verified post-campaign reports — so an agent defends a price with external data, not a gut feeling.

  • Built the FR-market CPM benchmark — median, P25, P75 by niche from the public YouTube API
  • Shipped verified post-campaign reports from the YouTube Analytics API over OAuth read-only
  • Solo across the stack: pricing engine, deal desk, ROI simulator, the data pipeline
Open project
sponsorsmetrics.com
SponsorsMetrics — the pricing cockpit for YouTube talent agents
sponsorsmetrics.com — 2026
Project
atamatax
Category
Fintech · Tax
Client
Self · product
Year
2025 · Solo build

atamatax — file your taxes without an accountant

A guided, question-by-question tax engine that turns the annual return into a 20-minute conversation. No spreadsheet, no accountant, no jargon — answer plain questions, atamatax computes and fills the rest.

  • Built the tax-logic calculation engine from scratch — every rule, no library
  • Solo across the stack: product, UX, frontend, backend, tax engine
  • Turned an accountant-only domain into a 20-minute self-serve flow
Open project
atamatax.com
atamatax — file your taxes without an accountant
atamatax.com — 2025
Project
Neucelle
Category
B2B Ops · Inventory
Client
Self · product
Year
2025 · Solo build

Neucelle — inventory small teams actually keep up to date

Stock tracking built for businesses too small for an ERP and too real for a spreadsheet. Scan, count, get low-stock alerts — inventory that stays accurate because keeping it accurate takes seconds.

  • Designed the scan-count-alert loop to beat opening a spreadsheet
  • Solo full-stack — from data model to the mobile scan UI
  • Scoped hard against ERP bloat — every feature earns its place
Open project
neucelle.ch
Neucelle — inventory small teams actually keep up to date
neucelle.ch — 2025
Project
Vellaci
Category
Consumer · Personal CRM
Client
Self · product
Year
2025 · Solo build

Vellaci — a personal CRM that keeps you in touch

A private CRM for your actual life — friends, family, the network you keep meaning to nurture. Vellaci nudges you before relationships go cold and remembers the details you forget.

  • Built a reminder engine that scores relationship "coldness" and nudges in time
  • Privacy-first architecture — data never leaves the user's account
  • Solo: the product, the design system, the full stack
Open project
vellaci.ch
Vellaci — a personal CRM that keeps you in touch
vellaci.ch — 2025

The conviction

A prototype
impresses.
A v1 has to survive
its first real user.

That is the only version I build — the one a founder can put in front of an investor, or a real customer, without flinching.

02 — Process

How I work.

Four steps, fixed scope, price agreed upfront. No hourly billing, no black box, no surprises.

Start a project →

Step 1 — 20 minutes, free.

  1. Step 01

    Scope call

    20 minutes, free. We figure out what you want to ship, for whom, and by when. If I’m the wrong person, I’ll say so.

  2. Step 02

    Fixed-fee proposal

    Within 48h. Scope, deliverables, one fixed fee agreed upfront, dated milestones. No "starting at".

  3. Step 03

    Delivery sprint

    4 to 6 weeks. A Friday demo every week on a Vercel preview. You watch the product grow live — no black box.

  4. Step 04

    Hand-off + 30 days

    You leave with the repo, the accounts, the pipeline. One month of 24h replies. Beyond that: a fresh fixed-fee scope.

03 — About

One brain.

Danilson Ramos — Zürich, CH
Danilson Ramos47.37°N · 8.54°E

FR (native) · EN (fluent) · PT (heritage)

Ten years writing software, five pairing it with design. Portuguese by heritage, French by birth, Swiss by address — I work out of Zürich, mostly with founders shipping their first product.

I build the v1 most agencies subcontract. End to end: positioning, design system, Next.js codebase, Postgres schema, billing, transactional email, deploy pipeline. Fixed-scope sprints, one fixed fee.

I don’t subcontract. I don’t ship Figma without code, or code without design review. When the data model is shaky, I rewrite it in week two so you don’t pay for it in week ten.

Default stack

  • Next.js
  • TypeScript
  • Tailwind v4
  • Postgres
  • Vercel

Also fluent in

Python · SQLite · Stripe · Resend · BrightData

Now

This week
Rebuilding this portfolio — Swiss, paper direction
Availability
1–2 projects · per quarter
Current stack
Next.js 16 · motion · Tailwind v4
Last shipped
d5874e1 · Add liquid-glass nav, scroll progress, multilingual welcome rota