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Luis User

@luisuser14

Software Architect at Nexo Stack designing distributed AI systems and event-driven billing for a multi-tenant SaaS platform.

Colombia

Message

At Nexo Stack, I designed the architecture for a multi-tenant SaaS ecosystem spanning AI applications, inventory management, and tracking systems. I also architected a distributed billing system with recurring subscriptions, payment retries, and idempotency.

I built AI workflows combining state machines with natural language fallback using Amazon Bedrock and RAG pipelines. Earlier, I developed data pipelines and backend systems at Globant and as an independent consultant, using AWS services to support event-driven processing and analytics.

Experience

Work history, roles, and key accomplishments

Current

Software Architect (Distributed Systems & AI)

Current

Nexo Stack

Feb 2025 - Present (1 year 8 months)

• Designed and led the architecture of a multi-tenant SaaS ecosystem for AI applications, inventory management and tracking systems, with clear domain separation between Hub, Payments and platform applications.
• Architected and implemented a distributed billing system supporting recurring subscriptions, payment retries, webhook orchestration, idempotency and eventual consistency across services.

Senior Backend Engineer & Cloud Architect (Node.js | AWS)

Independent Consultant – Backend & Cloud Architecture

Mar 2023 - Feb 2025 (1 year 11 months)

Migrated data sources from NoSQL schemas to structured pipelines using Python-based ETL processes.
• Designed batch processing systems in Node.js using AWS Step Functions and SQS.
• Developed centralized platforms aligned with business activities to display actionable data.
• Automated CI/CD workflows with AWS Lambda, improving delivery cycles.
• Built systems for company-wide sales closing, docum

Back End Developer

Globant

Jun 2022 - Mar 2023 (9 months)

• Developed ETL systems for Colombian accounting platforms with NestJS and AWS Lambda.
• Used Prisma ORM and PostgreSQL for effective data modeling.
• Optimized system performance and scalability with AWS-native tools.

Back End Developer

igloolab

Jul 2021 - Jul 2022 (1 year)

• Designed and implemented microservices architecture for healthcare systems using NestJS and Digi-
talOcean.
• Led cross-functional teams to build and deploy micro frontends using Angular and ReactJS.

Full Stack MID Engineer

Siigo

Jul 2020 - Apr 2021 (9 months)

• Re-engineered frontend modules of Colombian accounting platforms using Angular and Azure Func-
tions.
• Enhanced analytics capabilities through integration with Google tools (e.g., Analytics, Tag Manager).

Full Stack JR Engineer

TiQal S.A.S.

Mar 2019 - Mar 2020 (1 year)

• Developed a real-time monitoring system using Node.js and Angular 8 for operational visibility.
• Built and integrated a recruitment module into the existing ERP, enhancing HR workflows.