Senior Full-Stack Engineer (Backend, Integrations & Observability) · 17 Years
Santiago, Chile | Open to Remote
Professional Summary
Full-stack engineer and technical lead with 17+ years shipping production systems in React, Node.js, and TypeScript across AWS and Azure. Currently contracting for SaaS companies across the U.S., owning integrations, observability, and backend services — most recently building a full monitoring stack from scratch and identifying 3 confirmed bugs in external provider APIs. Enterprise background spans banking, retail, healthcare, and telecommunications. Author and maintainer of miqro on npm, a modular Node.js framework backed by 10 standalone packages under the same scope — combining a JSX-based static site generator, a runtime web framework, and a CLI that compiles apps to standalone cross-platform binaries. 6 peer-reviewed academic publications.
Core Skills
Area
Technologies
Languages
JavaScript, TypeScript, Python, Bash, Java, C#
Frontend
React.js, Next.js, Angular, HTML5, CSS3
Backend
Node.js, Serverless Functions, REST APIs, RESTful Services, Microservices, Queue Systems, Distributed Systems, System Design, Scalability, Django, Spring
Multiple SaaS Companies (U.S. and Local) · Remote Contract
Highlights from the most recent engagement:
Reduced database load from critical saturation to ~1% during a production lock incident, identifying and fixing a leaking abstraction in the data layer.
Built the product's entire observability stack (Sentry, alerting, logging), improving incident detection and reducing time-to-resolution across all services.
Discovered, isolated, and formally reported 3 confirmed provider-side API bugs; shipped interim workarounds that kept the platform operational while coordinating fixes upstream.
Own and operate the integration layer and production support across a hybrid serverless and Docker-containerised architecture — payment gateways, external data sync pipelines, and third-party connectors (Next.js, TypeScript, Prisma, Bash), with CI/CD via GitHub Actions and full root-cause resolution on live failures.
Maintain and extend the platform's AI integration layer — working with Anthropic Claude API and additional AI services embedded in production workflows to support intelligent automation across the product.
Earlier engagements in this period included integration and backend work for additional SaaS clients across South America and the U.S.
DevOps / R&D Engineer II — 2022 – 2023
Technology Company · Remote Fixed-term Contract
Designed and maintained CI/CD pipelines using GitLab CI and Jenkins for a legacy large-scale system, plus deployment workflows and developer tooling for a distributed international engineering team across multiple time zones.
Authored internal technical documentation, onboarding tutorials, and engineering standards — standardising code review practices, testing expectations, and deployment procedures across the team.
Managed cloud infrastructure operations and environment configuration for the legacy platform, ensuring stable and reproducible development and production environments during active R&D cycles.
Co-founded a technology consultancy with a business partner to deliver a fixed-term healthcare engagement — jointly managed company operations, general accounting, and client acquisition.
Served as Technical Lead — hired and coordinated external developers, set technical direction, and delivered cloud-native solutions for healthcare clients on Azure (React.js, Node.js, SQL Server).
Designed and built data collection and reporting services end-to-end, from cloud architecture through deployment; managed external contributors across the delivery lifecycle.
Identified and resolved a race condition in serial number generation left by a previous provider — a critical fix preventing duplicate identifiers under concurrent load across a large retail marketplace.
Designed and built internal APIs and multi-party integration layers for the same marketplace, including full courier service integration for shipment tracking, fulfilment workflows, and optimised thermal label PDF generation.
Delivered multi-cloud architecture and automation across AWS and Azure supporting cross-business data exchange for banking and retail clients.
Earlier Experience
Technical Lead & Pre-Sales Engineer | IT Solutions Company — 2016 – 2017
Promoted from developer to company-wide technical lead; co-led commercial proposals end-to-end with the Sales Director — scoping, feasibility, estimation, and solution design.
Built proof-of-concept applications in Angular and React.js for client evaluations; coordinated all development team leads across technical and commercial workstreams.
Developed a Python/Django production application for a retail client, protected by Cloudflare to withstand mass traffic during high-volume cyber retail events.
Systems Developer / Technical Lead | Telecommunications Product Company — 2014 – 2016
Extended a proprietary C++ application bus (CMake) by implementing a runtime plugin architecture supporting dynamically loaded Java runtimes, a Drools expert system connector, and a BPMN workflow engine.
Promoted to Technical Lead of the legacy product line; built Angular-based GUI tooling for internal platform management.
Delivered 7 projects over 4 years as sole developer or small-team lead — including a Warehouse Management System with SAP integration (C#, .NET MVC3), an Android mobile meter-reading app, and a home automation platform (Android + Spring).
Researcher & Developer | University Research Department — 2007 – 2009