Saulo Araújo — .NET & React Developer

01 — EXPERIENCE AND SKILLS

Solid back end, modern front end, integration-focused

I work across the whole development cycle: architecture, implementation, testing, code review and mentoring.

.NET back end

C#, .NET Framework and modern .NET up to version 10, ASP.NET Web API, RESTful and SOAP APIs.

EF Core
Dapper
MediatR / CQRS
OData
SignalR
Polly
Hangfire
FluentValidation

Front end

React and TypeScript apps and back offices, integrated with internal portals.

React
TypeScript
Vite
Material UI
Ant Design

Architecture

Domain-oriented design, design patterns and testable code.

Repository
Unit of Work
Strategy
Factory
DI / IoC
Clean Code

Data and messaging

Modeling, migrations and tuning of relational and NoSQL databases.

SQL Server
PostgreSQL
MongoDB
Redis
RabbitMQ
Azure Service Bus

Cloud and DevOps

Cloud-hosted applications with CI/CD, monitoring and logging.

Azure
Azure Functions
AWS
Docker
Kubernetes
CI/CD
Testcontainers

Applied AI

AI as a productivity tool and as a product feature.

OpenAI API
N8N
GitHub Copilot
Claude Code

05/2020 — present

Senior C# Developer · Techub

Lead developer of the Techub HR integration engine (~30 connectors to ERPs, payroll, occupational health and Brazil's eSocial) and of the digital onboarding platform. Since 2020 I have maintained Tecnoset's equipment amortization system (CAE), and I work on the customer portal, where I took part in the .NET 7 migration and in optimizations that made queries over 100× faster. .NET back end, React front end, SQL Server and MongoDB.
02/2019 — 05/2020

.NET Developer · InfoPartners

Decision-support system for hotel revenue management, with demand forecasting and integration with the hotel's PMS. ASP.NET Core, React, SignalR and Azure SQL.
10/2017 — 05/2020

.NET / PHP Developer · Esfera Informática

Projects for Serra Verde, CBL, CeqNep and Rede Massa — including the architecture of the massanews.com and redemassa.com.br portals, using IdentityServer, Redis, MongoDB and AWS.
06/2015 — 07/2017

Developer · TIVIT

Built and tested systems for internal and external clients with ASP.NET MVC, WebForms, Web API, Oracle, SQL Server and Informix.
2013 — 2015

Developer · Instituto Atlântico and Ânima Informática

Windows 8 apps, a gamified internal training web system, and migration of Delphi systems to C#.NET.

02 — SELECTED PROJECTS

Production systems with real users

Techub · HR tech · since 2021

Techub HR integration engine

.NET 8 worker that syncs new hires into client systems: about 30 connectors, each isolated in its own adapter, running as supervised tasks with retries and reprocessing. Complemented by HTTP- and queue-triggered Azure Functions.

.NET 8
Dapper
Polly
Azure Functions
MongoDB
SOAP / REST

Author of more than half of the repository's commits

Techub · HR tech

Digital onboarding platform

From candidate to employee: pre-hire, document collection with OCR, legal review, rule-based benefits, e-signature and automatic export to the client's ERP.

ASP.NET Core
EF Core
OData
SignalR
React

Migrated the Senior, RM and TecfyRH exports to the new engine version

Tecnoset · Finance · since 2020

CAE — equipment amortization

System that calculates and tracks equipment amortization across contracts: installment simulation, rate recalculation, monitored automatic amortization and historical reports.

.NET
EF Core
SQL Server
React
Jobs

Owner: over 90% of commits, including idempotency against duplicate records

Tecnoset · Customer portal

Customer and ticketing portal

Portal integrated with the Protheus ERP and Oracle RightNow. Migration to .NET 7, fixes for stuck task queues and diagnosis of distributed-transaction deadlocks.

.NET 7
EF Core
Protheus (SOAP)
Oracle RightNow

Access listing 263 s → 1.8 s; roles per user 27 s → 218 ms

InfoPartners · Hospitality

Hotel revenue management

Platform that helps hotel managers set room prices and inventory based on guest consumption patterns and demand forecasts, integrated with the hotel's PMS.

ASP.NET Core
React
SignalR
Azure SQL
Azure DevOps

Esfera Informática · Media

Massa News and Rede Massa portals

Planned and built the portal solution with a focus on performance, scalability and maintainability, including centralized authentication.

ASP.NET MVC
IdentityServer
Redis
MongoDB
AWS

03 — OWN PRODUCTS

SaaS products I designed, built and run in production

From domain model to infrastructure: back end, front end, tests, deployment and operations.

Multi-tenant SaaS · Travel

Veraneie

Management platform for vacation rental homes. Each subscriber manages homes, bookings, guests, payments, expenses and leads — and every home gets a public website with an availability calendar.

Multi-tenant isolation and a rule-based seasonal pricing engine
Dashboard with revenue, occupancy, ADR, RevPAN and year-over-year comparison
Availability calendar shipped as an embeddable Web Component
Per-subscriber audit trail with automatic retention
Integration tests with Testcontainers, including booking race conditions

veraneie.com.br ↗

SaaS · Events

Cenaro

Scheduling, client, quote and payment management for event professionals — DJs, photographers, planners and more.

Event calendar with blocked dates and availability control
Quotes and installment payments per event
Email/password, Google and Microsoft (Entra ID) sign-in unified into one account
Account-takeover protection for sign-ups with unverified email

cenaro.com.br ↗

04 — INTEGRATIONS

Integrations with enterprise systems and external services

About 30 connectors in the Techub HR integration engine, across SOAP web services and REST APIs, with OAuth 2.0, client-certificate and WS-Security authentication, plus retries and reprocessing so no data gets lost along the way.

TO

TOTVS

New-hire export to RM Labore, and sync of clients, projects, invoices and tickets with Protheus — Brazil's leading ERP suite.

Protheus · RM Labore

SE

Senior

Export of onboarded employees to Senior's HCM, including bank details. I migrated this integration to the new engine version.

Senior HCM

AD

ADP

New-hire delivery to ADP's payroll and HR platform, authenticated with a client certificate (mTLS) and OAuth token.

REST · mTLS

SO

Occupational health and eSocial

Employees, medical exams and fitness certificates in SOC; eSocial submission and physician validation through Midas.

SOC (SOAP + WS-Security) · Midas

ER

Other ERPs

New-hire and contract export to the Sankhya and Globus ERPs.

Sankhya · Globus

BG

Background checks

Criminal-record and lawsuit checks on candidates during pre-hire.

NextCode

VT

Benefits and commuting

Route planning and transit-pass purchase for new employees.

Capta

BK

Bank account validation

Automatic validation of the employee's bank account before it is exported to payroll.

Transfeera

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How I integrate

One adapter per system, supervised workers, Polly for resilience, queue-driven Azure Functions, export logs and reprocessing.

05 — EDUCATION AND CERTIFICATIONS

Continuous learning

Faculdade Sirius · 2025 — 2026 · 360 h

MBA DevXpert .NET Full-Stack

Graduate specialization with an international extension from Arizona State University (ASU). Advanced ASP.NET Core, software architecture and quality, enterprise applications and DevOps.

Faculdade Farias Brito · 2015

B.Sc. in Computer Science

Arizona State University · Najafi Global Initiative

Global Entrepreneurship and Innovation Foundations

Certification from the 100 Million Learners program.

Certifications and courses

Microsoft 98-361 — MTA: Software Development Fundamentals (C#)
Microsoft 70-480 — Programming in HTML5 with JavaScript and CSS3
.NET Software Architecture — desenvolvedor.io
Professional Programming with Clean Code — desenvolvedor.io
Mastering Software Testing — desenvolvedor.io
Docker from Zero to Advanced — desenvolvedor.io
Mastering Kubernetes — desenvolvedor.io
Introduction to DevOps — desenvolvedor.io
AI: Machine Learning and Supervised Learning — desenvolvedor.io (in progress)
Code & AI Workshop — Next Wave Education
N8N Fundamentals for Developers
Implementing / Maintaining a SQL Server 2005 Database

Let's talk

Open to remote .NET / full-stack roles, in Brazil and internationally.

Download résumé (PDF)

Emailsauloandrade.araujo@gmail.com

WhatsApp+55 41 98732-8014

LinkedInin/sauloaraujo

GitHubsauloaraujoo