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Available for freelance & product teams

Juliano Alves.

Senior Full Stack Engineer

I design and build fast, conversion-focused web & mobile products — from payment rails and credit journeys to race-day tooling.

years shipping
companies & clients
people reached

Trusted by teams at

RiachuelobyxPorsche Cup BrasilMIKA PaymentsBanco BMGSwisherTransferoSanofiPrudentialRiachuelobyxPorsche Cup BrasilMIKA PaymentsBanco BMGSwisherTransferoSanofiPrudential

Iturncomplexproducts—payments,credit,factoryfloorsandracetracks—intofast,accessibleexperiencesthatpeopletrustandbusinessesgrowwith.

Selected work

Products I've helped ship.

Payments, credit, e-commerce and real-time racing ops — drag, swipe or use ← →.

01Platform

Portal Industrial — BOL & BOM

Riachuelo · 2026

Factory software for clothing production management — bill of labor and bill of materials across Riachuelo's manufacturing.

ReactTypeScriptJavaREST APIs
02Platform

Race admin platform

Porsche Cup Brasil · 2026

Lap tracking, race closures, and vehicle damage reporting.

ReactNext.jsTypeScriptReal-time data
03Web

KYC

MIKA Payments · 2025

Know-your-customer onboarding and verification UI.

ReactNext.jsTypeScriptGraphQL
04Platform

Checkout & Backoffice

MIKA Payments · 2025

Operator and customer-facing tooling for payments and operations.

ReactNext.jsTypeScriptTailwind CSS
05Web

PIX & Boletos

Banco BMG · 2025

Digital payment experiences for BMG customers.

ReactNext.jsTypeScriptREST APIs
06Web

Crédito Consignado

Banco BMG · 2025

Consignado credit journeys on the web.

ReactTypeScriptAccessibility
07Web

Rogue Nicotine

Swisher · 2025

Enterprise e-commerce experience.

ReactNext.jsGraphQLNode.js
Visit project
08Mobile

Transfero App

Transfero · 2024

Cross-platform financial app in Flutter.

FlutterDartREST APIsWebSockets
09Mobile

White-label solutions

Transfero · 2024

Customizable apps for partners with full branding flexibility.

FlutterReactNext.jsTypeScript
10Web

Programa Viva

Sanofi · via Valtech · 2023

Patient-support platform — client and public areas — built with Next.js and Contentful.

Next.jsReactContentfulTypeScript
11Platform

Customer area

Prudential · via Valtech · 2022

Customer area for Prudential do Brasil, a multinational life insurer — as tech lead.

ReactTypeScript.NETDevOps

Why work with me

Engineering that moves your numbers.

Beautiful is the baseline. I build products that are fast, reliable and designed to turn visitors into customers.

Built to convert

Interfaces designed around the action that matters — sign-up, checkout, onboarding — and measured after launch.

Fast by default

Core Web Vitals treated as a feature. Snappy pages keep users moving and rank better.

Production-grade

Typed, tested and accessible. Shipped in regulated domains — payments, credit, KYC — where mistakes cost real money.

Design-minded

Fluent in Figma and design systems, so the details designers care about survive into production.

How I work

A process with no surprises.

Four steps, from first call to a product in production — the same rhythm I've used with banks, startups and racing teams.

  1. 01

    Discover

    We align on goals, users and the metric that defines success. I map the risks before writing code.

  2. 02

    Design & architect

    Flows, components and data contracts. A plan you can review — no surprises later.

  3. 03

    Build in the open

    Short cycles, preview links on every change and weekly demos. You always know where things stand.

  4. 04

    Ship & measure

    Launch with monitoring, analytics and a performance budget — then iterate on real data.

FastAccessibleScalableConvertingTypedTestedFastAccessibleScalableConvertingTypedTested

What I do

End-to-end, from pixel to pipeline.

Six ways I can help — scroll through them.

01 / 06

Frontend Development

Building responsive and interactive user interfaces using modern frameworks like React and Next.js.

  • Responsive Web Design
  • Single Page Applications
  • Progressive Web Apps
  • Cross-browser Compatibility
02 / 06

Backend Development

Developing robust server-side applications and APIs to power your web applications.

  • RESTful API Development
  • Database Design
  • Authentication & Authorization
  • Server Management
03 / 06

Mobile Development

Creating native and cross-platform mobile applications for iOS and Android.

  • React Native Development
  • iOS Development
  • Android Development
  • App Store Deployment
04 / 06

Code Review & Mentoring

Providing code reviews and mentoring services to help teams improve their development practices.

  • Code Quality Assessment
  • Best Practices Implementation
  • Team Training
  • Architecture Review
05 / 06

DevOps Services

Setting up and maintaining development operations pipelines for efficient deployment.

  • CI/CD Pipeline Setup
  • Docker Containerization
  • Cloud Deployment
  • Performance Optimization
06 / 06

Technical Consultation

Offering expert advice on technical decisions and architecture planning.

  • Technology Stack Selection
  • Architecture Planning
  • Security Assessment
  • Performance Auditing

Stack

Tools I reach for daily.

Battle-tested across fintech, retail, e-commerce and motorsport — the numbers are years in production.

Daily drivers

core
  • React

    years · Riachuelo · MIKA · Banco BMG · Porsche Cup

  • Next.js

    years · Swisher · Sanofi · MIKA · Transfero

  • TypeScript

    years · Every product since 2020

  • Node.js

    years · APIs, BFFs and integrations

Full toolbox

tools used in production

ReactNext.jsTypeScriptNode.jsTailwind CSSReact QueryRadix UIAngularFramer MotionREST APIsNest.jsGraphQLPostgreSQLWebSocketsPythonGitHub ActionsDocker
AWSAzure DevOpsVercelCloudflareBigCommerceBloomreachContentfulStrapiFigmaAccessibilityDesign systemsWebflowTesting LibraryJestPlaywrightFlutter

Front-end

Interfaces that load fast and feel effortless.

  • Tailwind CSS4y
  • React Query4y
  • Radix UI3y
  • Angular3y
  • Framer Motion3y

Back-end & APIs

Services and data layers behind the UI.

  • REST APIs8y
  • Nest.js4y
  • GraphQL4y
  • PostgreSQL4y
  • WebSockets4y
  • Python2y

Cloud & DevOps

Pipelines, hosting and the edge.

  • GitHub Actions4y
  • Docker4y
  • AWS4y
  • Azure DevOps4y
  • Vercel4y
  • Cloudflare3y

Commerce & CMS

Headless storefronts and content platforms.

  • BigCommerce1y
  • Bloomreach2y
  • Contentful2y
  • Strapi2y

Design & UX

Where design and code meet.

  • Figma5y
  • Accessibility5y
  • Design systems4y
  • Webflow2y

Quality & mobile

Tests you can trust and apps in the stores.

  • Testing Library5y
  • Jest5y
  • Playwright2y
  • Flutter2y

Open source

Small tools, shared.

Contributing to and maintaining open source projects to improve the developer ecosystem.

Writing

Latest articles.

Knowledge and experiences, written down in depth.

    FAQ

    Questions, answered.

    Something else on your mind? Ask me directly.

    • Web and mobile products where quality matters: fintech flows (payments, credit, KYC), e-commerce storefronts, internal platforms and dashboards. I join as a freelancer, as a contractor inside your squad, or full-time.

    Have a project in mind?

    contato@julianoalves.me

    Rio de Janeiro · UTC−3