Gael
Espinosa.

full stack engineer Valparaíso, Chile

Full stack engineer with 10+ years across Python, JavaScript, and cloud infrastructure. Known for deep curiosity, fast learning, and being the person teammates turn to when problems get hard. Equally at home designing backend systems from scratch or diving into complex existing codebases.

Avatar of Gael Espinosa

Where I’ve
worked

Senior Software Engineer

@ tvScientific

Lead full stack engineer on a fast-paced adtech SaaS platform, owning backend architecture and frontend foundations across a major codebase overhaul. Led a backend refactor that reduced system complexity and improved performance, built the foundational architecture for a new core frontend app, and drove shift-left practices to catch bugs earlier in the pipeline.

Python TypeScript React AWS

Technical Lead

@ Unholster

Technical lead for multiple cloud-native SaaS products on AWS and GCP, responsible for system design, delivery, and team mentoring. Designed and led the implementation of a scalable near real-time HIPAA-compliant medical data ETL pipeline and built a serverless organizational governance platform.

Python AWS GCP Serverless

Software Engineer

@ BitterSweet

One of two engineers with full technical ownership over a data science platform for the oil and gas industry. Translated research notebooks into production-ready features and designed REST APIs, covering everything from infrastructure to UI for an oilfield resource optimization product.

Python REST APIs Data science

Consultant — Developer

@ ThoughtWorks

Delivered CI/CD infrastructure and resource provisioning at scale for a major airline, enabling multiple parallel feature teams to develop and ship independently. Eliminated weekly CI/CD infrastructure failures by modernizing legacy Jenkins instances.

CI/CD Jenkins DevOps

Software Engineer

@ Unholster

Full stack engineer delivering mission-critical software for Chile's national power grid coordinator. Automated manual financial calculations with zero-tolerance accuracy requirements and built web platforms, real-time data processing pipelines, and reporting tools that eliminated error-prone manual processes.

Python Data pipelines Integrations

Software Engineer

@ Nuwit

Backend engineer building customer-facing web applications for a major retail mall — discovery, ticketing, and parking systems. Implemented a TF-IDF-based recommendation engine for similar product suggestions.

Java Python NoSQL

Software Engineer & Founder

@ QWERTY

Co-founded a software consultancy delivering web and mobile solutions across energy, legal, and small business sectors. Grew the client base to 10+ — the consultancy continues operating today — and established its core technical infrastructure and development processes.

PHP WordPress Web & mobile

Selected
work

all projects

This portfolio itself. A markdown-driven static site built with Pelican, Tailwind CSS v4, and daisyUI 5, wearing a dark neubrutalist theme and deployed to GitHub Pages on every push.

python pelican tailwind daisyui github.io
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A free event discovery platform for Chile — find what's happening near you, or publish your own event with zero friction. Django 6 on Python 3.13, PostgreSQL, deployed on Fly.io.

django postgresql tailwind fly.io
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A freemium web tool that exports ClickUp workspace docs as portable markdown files. Python library + CLI at the core, Django web UI on top, deployed on Fly.io.

python django tailwind fly.io
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Full-stack AI career toolkit built and deployed in 3 days. ATS scoring against job descriptions, batch multi-JD comparison, interactive per-role resume coaching, and resume export as structured RenderCV YAML with PDF download.

django htmx claude-api fly.io
read writeup →

A year of
commits

Contribution activity for @picklecillo, straight from the source.

GitHub contribution chart for picklecillo

Say
hello

Have a project in mind, a role to discuss, or just want to talk shop? Drop a message with the form and it lands straight in my inbox.