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Andrés López

@andrslpez2

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Backend engineer at SONDA building a healthcare MVP with NestJS, TypeScript and PostgreSQL.

Colombia

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What I'm looking for

I'm open to remote backend and full-stack opportunities.

At SONDA, I'm building the backend from scratch for sales portals and the back office of a healthcare application MVP. I designed its backend architecture and data model using NestJS, TypeScript and PostgreSQL.

At Globant, I developed merchant features for a banking mobile wallet, including secure payment services and bulk merchant onboarding. I also optimized PostgreSQL queries and Redis caching to cut response times by 40%.

At Sofka Technologies, I built REST APIs and microservices for the back office of a mobile banking wallet serving 2M+ active users. The work included processing monetary adjustments, integrating third-party services and reducing latency by 35% through optimization and caching.

I’ve also delivered frontend features with React and Angular, mentored junior developers and contributed to code reviews. My background includes degrees in Systems Engineering and Civil Engineering, and I’m open to remote backend and full-stack opportunities.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer

Current

SONDA

Apr 2026 - Present (7 months)

Building from scratch the backend for the sales portals and the back-office of a healthcare-sector application (MVP stage).
• Designed the backend architecture and data model for a greenfield MVP using NestJS, TypeScript and PostgreSQL.
• Develop RESTful APIs that serve the online sales portals and the back-office application.
• Implement Redis caching and integrations with third-party services in

Semi-Senior Node.js Developer

Globant

Sep 2024 - Mar 2026 (1 year 6 months)

Backend development of merchant features for a high-volume banking mobile wallet, using a microservices architecture with NestJS.
• Designed and implemented secure payment processing services with NestJS, TypeScript and Kafka.
• Developed a bulk merchant creation system that onboards hundreds of merchants at once.
• Refactored legacy code, improving maintainability and cutting technical debt by 30

Development Consultant

Sofka Technologies

Jul 2022 - Sep 2024 (2 years 2 months)

Backend development for the back-office of a mobile banking wallet serving 2M+ active users.
• Built RESTful APIs and microservices with NestJS that process hundreds of manual monetary adjustments daily, with accuracy and audit compliance.
• Used Kafka for event-driven data processing and AWS for cloud deployment.
• Integrated third-party services: Oracle CRM, PTS, Mambu and Auth0.
• Managed a mul