Open to opportunities

Jeremias Rivarola

@jeremiasrivarola

Message

Senior full-stack engineer delivering end-to-end production web apps with Python, Node.js, and React/Next.js.

Argentina

Message

What I'm looking for

I’m looking for a Senior full-stack role where I can own end-to-end delivery—architecture to monitoring—build with Python/Node/React/Next.js, and ship high-impact performance and AI/RAG features with strong engineering standards.

I’m a senior full-stack engineer with 7+ years building and shipping production web applications, including 6+ years working with U.S. teams across enterprise platforms and startups. I take products end to end—architecture, API design, deployment, monitoring, and scale—using Python, Node.js, and React/Next.js.

Recent wins include cutting API p95 latency by ~35% and reducing infrastructure cost by ~25%. I’ve designed REST and GraphQL services, built real-time front ends, and used caching and query optimization to keep performance stable under load.

I also ship AI features in production—building LLM/RAG capabilities with eval-based quality gates. I harden delivery pipelines with Docker, Kubernetes, and CI/CD automation, and I mentor engineers while driving quality through testing practices like TDD and strong CI standards.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

City Park Authority

Oct 2023 - Present (2 years 8 months)

Owned end-to-end delivery of customer-facing services on Oracle Cloud, designing REST and GraphQL APIs and cutting p95 latency from ~800 ms to ~520 ms using Redis caching and query optimization. Shipped React/Next.js front ends and production RAG features, and reduced deploy time from ~25 minutes to under 8 minutes by hardening CI/CD with Docker and Kubernetes.

fastAPI Django GraphQL Redis Next.js Pgvector GitHub Actions Docker Kubernetes

Full-Stack Developer

Net At Work

Apr 2021 - Oct 2023 (2 years 6 months)

Built Node.js (NestJS) and Python services handling 500K+ daily API requests via GraphQL and FastAPI, adding caching and queueing to keep p99 stable under load. Delivered an AI search and recommendation system that improved relevance by ~30% and implemented AWS serverless workloads that reduced infrastructure cost by ~25%.

NestJS fastAPI GraphQL AWS Lambda Caching Queueing Systems LlamaIndex TDD

Frontend Developer

Arctiq

Jan 2020 - Apr 2021 (1 year 3 months)

Built and shipped React and Vue.js interfaces, improving responsiveness by ~25% through code-splitting and memoization. Created a reusable Tailwind CSS component library and partnered with backend teams to integrate REST APIs.

React Vue.Js Tailwind Memoization Component Libraries REST APIs

Frontend Developer

AsiaPac

May 2019 - Jan 2020 (8 months)

Developed responsive, cross-browser web interfaces and collaborated with designers to deliver client projects. Focused on ensuring consistent UI behavior across browsers while shipping client-ready frontend experiences.

Responsive Web Design Frontend Collaboration With Designers