Digital presence and performance
Websites, editorial platforms, technical SEO, and Core Web Vitals for pages that need to convert and rank.
Experience
Real delivery translated into B2B services
Product platforms, editorial systems, privacy workflows, ERP, financial portals, and automation shaped into services a business can use.
This page shows how Sergio’s background becomes SPFG Tech delivery. Some work was delivered through SPFG contracts. Other work is founder background, used here to show the technical depth behind each project.
What this experience proves
The showcase is organized by business value, not by resume chronology.
Custom systems
Portals, dashboards, logged-in areas, product flows, and backoffices that reduce manual work.
Integrations and automation
CRM, payments, ERP, APIs, webhooks, and data moving between tools without rework.
Privacy and sensitive data
Products with consent, dynamic forms, privacy workflows, auditability, and care for critical information.
Analytics and growth
Tracking, funnels, dashboards, and behavioral insight to improve acquisition and conversion.
Applied AI
AI used to speed discovery, prototyping, refactoring, and automation with technical review.
SPFG contracts
SPFG contract Digital media and publishing
The Daily Beast
Frontend architecture for a headless Astro and React editorial platform on Arc XP, serving tens of millions of monthly users with a focus on performance, editorial integrations, and AI-assisted delivery.
Outcomes and proof
- Tens of millions of monthly users
- Core Web Vitals improvements
- OpenWeb, Zephr, and Sanity integrations
- Scripts and pipelines for faster validation
Related services
Web performance Editorial platform Frontend architecture AI-assisted delivery
Stack
Astro, React, Arc XP, Sanity, OpenWeb, Zephr
Gallery
Homepage content platform
High-traffic editorial homepage designed to surface breaking news, trending stories, and personalized content at scale.
Editorial article experience
Core reading experience optimized for engagement, performance, and monetization through ads, comments, and content discovery.
Paywall and conversion flow
Subscription gate designed to convert readers into paid users through clear value messaging and frictionless access paths.
Subscription and pricing system
Structured pricing experience supporting multiple plans, promotional offers, and recurring revenue models.
Newsletter acquisition system
Email subscription flows designed to capture users and drive long-term engagement through segmented content delivery.
User engagement and comments
Integrated discussion system enabling real-time engagement, community interaction, and increased session depth.
SPFG contract Restaurants, retail, and digital product
ItsPleinAir
SPFG contract through ItsPleinAir on customer-facing platforms, dashboards, loyalty flows, and product work for restaurant and retail environments spanning 30+ brands and thousands of physical locations.
Outcomes and proof
- 30+ restaurant and retail brand environments
- Customer-facing flows for thousands of physical locations
- Better consistency across projects
- AI-assisted prototyping and refactoring
Related services
Web product Dashboards Conversion flows Shared components
Stack
React, Next.js, Vue, Nuxt, TypeScript
Gallery
Checkout Experience
Optimized checkout flow focused on speed, clarity, and conversion, supporting scheduling, pickup/delivery logic, and seamless payment integration.
Menu Experience
Dynamic menu system designed for performance and scalability, enabling fast browsing across large catalogs with clear product hierarchy.
Product Customization
Flexible configuration system supporting complex modifiers, real-time pricing, and intuitive UX for highly customizable products.
Location Selection
Store discovery experience combining maps, search, and structured lists to handle large datasets and ensure smooth ordering entry points.
Marketing Experience
High-impact landing experiences built to drive engagement, highlight promotions, and guide users into ordering flows.
Growth & Engagement
Integrated rewards, upsells, and promotional modules designed to increase average order value and user retention.
SPFG contract Media, SEO, affiliates, and monetization
Leaf Group
Shared platform for high-traffic editorial brands reaching millions to tens of millions of monthly users, including Vue/Nuxt to React/Next.js migration, SEO, accessibility, and monetization.
Outcomes and proof
- Millions to tens of millions of monthly users
- Component architecture across brands
- LCP, CLS, FCP, and FID optimization
- Apple News, affiliate, and advertising integrations
Related services
Content websites Technical SEO Performance Digital monetization
Stack
React, Next.js, Vue, Nuxt, Node.js, GraphQL, MongoDB, Cloudflare
Gallery
Featured editorial system
Module for highlighting stories, interviews, and curated content inside a high-traffic editorial platform.
Predictive content search
Search with suggestions that helps readers find articles and guides with less friction.
Filtered inspiration gallery
Visual grid with filters for browsing large content collections without hurting performance.
Editorial authority system
Pages designed to communicate editorial authority, medical review, and quality standards for sensitive content.
Consumer technology publication
Editorial experience for consumer technology content, built on shared layouts across brands.
Personal finance platform
Personal finance editorial platform prepared for SEO, recurring content, and monetization.
SPFG contract Privacy, compliance, and SaaS
Certsys
Part-time SPFG contract for PrivacyFlow.ai, a SaaS platform created to help small and mid-sized businesses comply with Brazil’s LGPD.
Outcomes and proof
- Conditional questionnaires
- Consent and DSR workflows
- Full-stack architecture for a scalable product
Related services
SaaS Privacy workflows Dynamic forms Brazilian payments
Stack
React, Next.js, Node.js, NestJS, Vue, MongoDB, WordPress
Gallery
PrivacyFlow dashboard
Central panel for managing consent, privacy policies, and data subject request workflows.
Dynamic DSR form
Configurable flow for access, correction, and deletion requests related to personal data.
Cookie consent customization
Visual and behavior configuration for consent banners on business websites.
Privacy policy generator
Guided questionnaire that turns company data into privacy documents and settings.
Product landing page
Commercial page explaining privacy maturity, governance, and LGPD compliance benefits.
Business value of privacy
Messaging around trust, credibility, and organization for companies that handle personal data.
Founder background
Founder background Private pension and financial institutions
Sinqia
Modernization of financial systems and participant self-service portals, including web, mobile, and APIs.
Outcomes and proof
- Migration to web-first architecture
- Reusable interfaces across enterprise products
- APIs integrated with Oracle
Related services
Secure portals Financial dashboards Legacy modernization Mobile apps
Stack
Angular, Ionic, C# .NET Core, React, Node.js, Oracle
Gallery
Mobile pension dashboard
Summary view for participants to track balance, profitability, and account operations.
Profitability by investment profile
Historical performance view for comparing profiles and supporting participant decisions.
Risk profile allocation
Interface for reviewing portfolio composition across fixed income, multi-market, and equity options.
Contribution setup
Flow for defining monthly contribution percentages based on plan rules and salary ranges.
Benefit simulation
Tool for projecting retirement scenarios based on contributions and balance growth.
Participant financial portal
Self-service portal for balances, contributions, statements, and financial indicators.
Founder background Pension and enterprise systems
ADS Prev
Enterprise systems for private pension, including admin portals, financial dashboards, and participant simulation tools.
Outcomes and proof
- Angular apps for large clients
- Modular components
- Custom flows based on business rules
Related services
Enterprise systems Financial portals Reusable components Oracle integrations
Stack
Angular, C# .NET Core, Oracle, TFS
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HR administration portal
Interface for HR teams to manage participants, contributions, and pension plan processes.
Retirement simulator
Interactive tool for estimating benefits, contribution scenarios, and projected balances.
Participant financial dashboard
Panel for displaying balance, contributions, indicators, and participant financial history.
Secure portal access
Authenticated entry point for a financial platform with sensitive data and access rules.
Founder background ERP, retail, manufacturing, food, and fuel stations
Teknisa, Pebbian e Odhen
ERP, POS, commercial automation, manufacturing systems, and legacy-to-web migrations with technical leadership and direct enterprise client contact.
Outcomes and proof
- Systems for pharma, food, and retail industries
- POS integrated with pumps and inventory
- Team leadership in web migration
Related services
ERP and operations POS and retail BI and dashboards Legacy-to-web migration
Stack
Delphi, AngularJS, PHP, Oracle, SQL Server, PostgreSQL, MongoDB
Gallery
Retail point of sale
POS for stores and convenience retail, with catalog, checkout, pricing, and inventory integration.
Fuel pump monitoring
Panel for tracking pumps, fuel types, and transactions in gas station operations.
Modernized web ordering
Web module created from legacy modernization to improve usability and maintenance.
Commercial dashboard
Indicator view that supports commercial, financial, and operational decisions.
Field sales app
Mobile app for field representatives to create orders and sync them with the ERP.
Production management
ERP module for production, traceability, and factory workflows in industrial companies.
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