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Alexsandro Richard Martins de Souza

@alexrms

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I build scalable SaaS, fintech, and AI products from architecture through production.

Brazil

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What I'm looking for

I'm looking for opportunities as an AI Engineer, Senior Backend Engineer, Senior Software Engineer, or Senior Full-Stack Engineer, especially building scalable SaaS platforms, cloud architecture, fintech products, and applied AI.

I've built and evolved financial services, digital asset, and integration products at Loopi, owning work from business discovery through backend and frontend delivery, testing, and continuous deployment.

I founded Wapzi and built its B2B SaaS platform end-to-end: multi-tenant architecture, AI agents, RAG knowledge retrieval, omnichannel messaging, CRM workflows, and production infrastructure. I led product strategy, software architecture, integrations, positioning, and execution.

At Redação Online, I helped build Nivia.ai and reduced essay-correction turnaround time by up to 95%. Earlier at Flexy Digital, I reduced daily database requests by around 70% with Redis caching and helped cut backlog and technical debt by an estimated 50%.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Loopi

Jul 2021 - Present (5 years 1 month)

Designed and implemented scalable backend APIs and software solutions for financial services and digital products. Contributed to systems supporting game tokens, stablecoins, crypto products, and asset-related financial solutions.

TypeScript NestJS React Next.js AWS GCP Claude Code Clean Architecture SOLID Refactoring Smart Contracts Blockchain

AI Engineer

Wapzi

Jan 2025 - Feb 2026 (1 year 1 month)

Side project - part-time.
Founded and built a B2B SaaS platform combining AI agents, RAG-powered knowledge retrieval, omnichannel customer service, CRM workflows, and business automation. Architected a multi-tenant platform with Firebase Authentication, Firestore, and AI-driven workflows.

TypeScript NestJS Next.js React Firebase Firestore Vercel OpenTelemetry Payload CMS OpenAI Telegram Bot API RAG LLM AI Agents

AI Engineer

Redação Online

Jul 2024 - Dec 2025 (1 year 5 months)

Side project - part-time.
Built and evolved an AI-powered EdTech platform for automated essay correction, OCR transcription, and student dashboards. Generated up to 95% reduction in essay correction turnaround time.

TypeScript Express Firestore Cloud Storage RBAC Next.js React OpenAI Claude Gemini Google Vision Cloud Functions Prompt Engineering

Software Engineer

Flexy Digital

Dec 2018 - Jul 2021 (2 years 7 months)

Built customer-specific features, integrations, and platform improvements in a PHP/Symfony environment. Reduced daily database requests by around 70% through a Redis-based cache and data invalidation system.

PHP Symfony Redis Caching Backend Integrations Frontend Architecture