01
Software & Product Engineering
React · React Native · TypeScript · JavaScript
Next.js, Expo, web and mobile applications in production, from requirement to deploy
Open to work
Software Engineer · São Paulo, Brazil
Igor Pereira dos Santos
I build and maintain systems in production — React, React Native, integrations and automation.
5 years between product, integrations and business: REST APIs, Azure Logic Apps, SQL and Bubble.io across enterprise and financial operations.
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Trusted with solutions for
ItaúUnimedAssaíPluxeeAPetPipeimobItaúUnimedAssaíPluxeeAPetPipeimob
Product, integrations and automation — in systems that actually run.
I'm Igor, a software engineer based in São Paulo. For 5 years I've built and maintained systems in production inside enterprise operations and financial products — contexts where a mistake costs real money. My work sits at the boundary between product, integrations and business: understanding the need, designing the solution, shipping it and keeping it alive.
Today I build web and mobile applications in React and React Native with TypeScript, integrations and automation on Azure (Logic Apps and API Management), REST APIs and SQL. Bubble.io is one of my strongest specialities — complex workflows, custom plugins and enterprise systems running in production. I use Claude Code daily as part of an AI-assisted engineering workflow: codebase exploration, planning, implementation, debugging, refactoring, testing and documentation.
- 0+years
- shipping in production
- 0clients
- enterprise channels served
- 0+systems
- integrated through APIs
Igor S.São Paulo · BR
Where I'm genuinely strong.
Organised by capability, not by a wall of logos: what I use in production comes first, what is knowledge stays labelled as knowledge.
02
Integration & Automation
REST APIs · Azure Logic Apps · Azure API Management
System-to-system integration, financial APIs, webhooks, automation and troubleshooting
03
Low-Code Engineering
Bubble.io · Custom plugins
Complex workflows, API integrations, performance and standardisation in production
04
Data
SQL · SQL Server · PostgreSQL
Modeling, queries, data manipulation, troubleshooting, Power BI
05
AI-Assisted Engineering
Claude Code · Agentic development workflow
Codebase exploration, planning, implementation, debugging, refactoring, testing and documentation
06
Additional knowledge
Node.js · Angular · Java/Spring
Technologies I studied or touched briefly — listed as knowledge, not as professional experience
5 years shipping — since 2021.
Systems in production across enterprise and financial contexts — from standing up an IT function to keeping the product running.
- 2021 — Present
MPDS
Partner · Software Engineer
Company where I'm a partner — on-demand development of mobile and web applications, integrations, automation and recurring technical support.
- Mobile app in React Native + Expo with TypeScript, running in production — multi-tenant architecture, authentication, offline-first behaviour, notifications and store releases.
- Websites and web applications in React/Next.js and TypeScript — from requirement to deploy, focused on performance, accessibility and SEO.
- On-demand integrations and automation: REST APIs, Azure flows, payment integrations, SQL queries and recurring technical support. AI-assisted development with Claude Code as part of the workflow.
- 2025 — 2026
Pipeimob
Software Engineer
Real-estate transaction platform (TRM) integrated with a Digital Bank — I worked across two squads, with Bubble.io and integrations as my main front.
- Banking squad — commission split, receivables anticipation and tax document issuance on a product moving R$ 40MM/month in commissions.
- Rentals squad — end-to-end TRM (contracts, recurring billing, tax documents) with notary offices certified in São Paulo, Rio de Janeiro, Santa Catarina and Rio Grande do Sul.
- Bubble.io as the main stack: custom plugins, REST API integrations with banking and tax services (Asaas, Celcoin), and performance work on the critical workflows of both squads.
- Apr/2023 — May/2025
APet (Amigoo Pet)
IT Specialist
Pet health insurance — I joined as a developer and was the first full-time hire for IT. I helped build the area from scratch and owned the SAV, the integrations and BI.
- SAV — Sales SaaS Portal (Bubble.io + Azure) end-to-end for a broad set of enterprise partners (Itaú, Unimed, Assaí, Pluxee, among others), at the security standard a bank like Itaú demands; Vindi integration wired into the sales flow.
- Integrations and automation on Azure Logic Apps and API Management connecting the SAV, partners, SutHub and Power BI; SQL and data modeling behind leadership reporting and day-to-day troubleshooting.
- IT function built from zero alongside a partner consultancy: gathering needs with business areas, prioritising demand, Scrum + ClickUp as the team's ritual, and coordinating developers and vendors.
Recent work.
Cuts of systems I worked on — from the real problem to what stayed running.
Bubble.io · Plugins · REST APIs · Financial integrationsPipeimob — TRM integrated with a Digital Bank
Brazil's first TRM platform integrated with a Digital Bank — serving 400+ agencies across 13 states (Lopes, RE/MAX, Keller Williams, among others). I worked across the Banking and Rentals squads, with Bubble.io, custom plugins and API integrations as my main front.
2025 — 2026View project
Bubble.io · Azure · SQL · Itaú-grade securityAPet — Tech, Enterprise Sales and Claims
Pet health insurance — I built the IT department in Scrum, ran the SAV (Bubble.io + Azure) for many enterprise partners (Itaú, Unimed, Assaí, Pluxee, among others) at Itaú-grade security, and supported the claims team. During the period, APet took 2nd place at the Reclame Aqui Award 2024 and returned as a finalist in 2025.
2023 — 2025View project
Education · Peer mentorship · ETEC + EACH USPECEM
Free tutoring that started among ETEC friends during the pandemic and grew into a multi-course project with institutional backing. I served as co-founder, peer mentor and tutor.
2021 — 2023View project
Formal study and certifications.
Software Engineering, technical IT diploma and certifications in cloud, data and low-code.
Universidade São Judas Tadeu
Software Engineering
2023 — 2026
ETEC
Systems Analysis and Development
2020 — 2022
CNA Languages
English — conversational
2014 — 2017
Certifications
- Microsoft Azure Fundamentals (AZ-900)
- Bubble.io Specialist
- Scrum Foundation Professional
- Databases — modeling and SQL
- English Proficiency — CNA
Peer mentorship
ECEM — tutoring that grew from inside ETEC.
I co-founded ECEM in 2021, during the pandemic, with a classmate at ETEC. It started as free tutoring for friends in our class and grew into other courses — Software Development, gastronomy, business administration, tourism — with a partnership with EACH USP, which brought us logic and math content and opened up the campus to our group. I served as peer mentor and tutor until early 2023.
- 100% free tutoring from day one
- 4+ ETEC courses reached
- Content taught: logic, Java, Spring, React, JS
- Partnership with EACH USP
Let's talk.
Project, opportunity or a virtual coffee — inbox is open.
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