Available for opportunities

Senior Software Engineer
& Tech Lead

Developing and leading backend services with Node.js, NestJS, TypeScript, microservices, and Kubernetes on cloud platforms.

Experienced with PostgreSQL, MongoDB, and observability tools to keep high-traffic, business-critical systems stable and performant.

< About Me />

I'm a Senior Software Engineer and Tech Lead with 7+ years of experience building high-traffic payment, promotion, and risk systems for e-commerce.

My background includes a strong focus on Node.js/NestJS, microservices, event-driven architectures, and cloud platforms (GCP/AWS). I previously served as CTO at Miss Berni, where I launched a Resume Builder SaaS that generated over 100,000 CVs in just 6 months.

Currently, I lead teams building scalable services with resilient architectures and zero-downtime deployments. I'm passionate about observability, reliability, and mentoring developers to build world-class software.

< Featured Projects />

Payments Hub

Microservices platform for payments with integrations to multiple processors, agnostic vaults and tokenization.

Nest.jsExpressGolangGKEMongoDBBigQueryELKDatadog

Eval Risk

Event-driven risk evaluation system integrating fraud tools, Cybersource, and in-house blacklists.

Nest.jsMicroservicesEvent-drivenBigQueryCybersource

Resume Builder (SaaS)

SaaS for CV generation and class planning, using OpenAI to assist Chilean teachers.

Next.jsNest.jsMongoDBGraphQLOpenAIAzureGCPDatadog

AniReveal

Anime discovery and recommendation platform

Next.jsReactTypeScriptTailwind CSS

Findly Now

Real-time search and discovery service built with Elixir

ElixirPhoenixPostgreSQL

< Experience />

Software Engineer IV / Technical Lead

Ripley Chile

Remote

Jan 2025 - Present

Leading teams building scalable payment, promotion and fraud services with event-driven microservices and PCI-compliant tokenization.

  • Led teams building scalable payment, promotion and fraud services with event-driven microservices
  • Ensured reliability and continuity of critical digital products through resilient architectures
  • Achieved zero-downtime deploys and strong observability

Chief Technology Officer (CTO)

Miss Berni

Remote

Jul 2023 - Apr 2024

Launched web platform and backend services, defining technical standards and roadmap. Directed full product lifecycle.

  • Launched web platform and backend services with Nest.js and Next.js
  • Defined technical standards and roadmap
  • Directed full product lifecycle and led a multidisciplinary agile team
  • Generated 100,000+ CVs in 6 months

Software Engineer III

Ripley Chile

Remote

Nov 2021 - Dec 2024

Developed and integrated e-commerce payment, promotion and fraud modules.

  • Developed and integrated e-commerce payment, promotion and fraud modules
  • Contributed to architecture, testing practices, and integrations with Webpay & Transbank
  • Worked on fraud systems integration

Senior Full Stack Developer

Clever IT

Remote

Jan 2021 - Nov 2021

Built backend services in Java and Node.js with relational and NoSQL databases.

  • Built backend services in Java and Node.js
  • Worked with relational and NoSQL databases
  • Enhanced system performance and ensured production stability

< Get In Touch />

I'm always open to discussing new projects, creative ideas, or opportunities to be part of your vision. Feel free to reach out!

© 2025 Juan Sarabia. All rights reserved. Built with Next.js & TailwindCSS