Santiago Salas 👋 Senior Frontend Engineer · 7 years of experience

Frontend architecture
State management
Performance
UX & product
Applied AI

I build and evolve complex frontends: data-dense, legacy-bound and used in production.

Seven years across enterprise SaaS, scientific data, computer vision and a ticketing product I co-founded. I own frontend architecture, state, performance and UX, and I work with AI both inside products and in how I engineer.

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Frontend engineering is the core. Product and AI widen its reach.

Architecture & state

Modular React and TypeScript applications, shared components and complex state, including inside legacy and multi-repository systems.

Performance & quality

Interfaces that stay responsive over large datasets and image sets, backed by unit, component and integration tests.

Product & AI

From validating a problem to live operation, and AI both integrated into products and used in my engineering work.

Career

Work experience

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01 Public data products

Servicio Geológico Colombiano

Mar 2020 – Nov 2021

Built the public seismic and volcanic viewers from scratch, from experience definition to frontend.
02 Specialized tooling

LinkedAI

Nov 2022 – Feb 2024

Built annotation, segmentation and review tools on HTML Canvas and integrated Segment Anything (SAM).
03 Product & AI

57Blocks

May 2024 – May 2025

Led the technical planning and first MVP of an AI app for project documentation; also web, Flutter and event work for client projects.
04 Enterprise scale

Cafeto Software / Apptega

May 2025 – Aug 2026

Full-time Senior Frontend Developer on an enterprise SaaS platform for a client of Cafeto Software, modernizing it progressively with React next to Angular.

Case studies

Projects

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Co-founded product

PASSTIX

A ticketing platform I co-founded, from problem validation to live events.

I lead the product experience and the frontend; my co-founder owns the backend. The work covers the digital product and the real operation around it: sales, QR access, reports and settlements with organizers and attendees.

Validation & MVP
UX & frontend
Live operation

See the story

Applied AI

AI in products, and AI in my engineering

AI inside products

Models and AI workflows integrated into product experiences I built. My part is the product and the frontend around them, not the model research.

AI in my engineering work

Claude Code and Cursor are part of how I build software, notably at Apptega and on PASSTIX. They speed up exploring code, implementing, testing and documenting. They don't replace technical judgment: I frame the problem, review what they produce and answer for the result.

Toolbox

Capabilities

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Architecture & state: React · TypeScript · Redux Toolkit · TanStack React Query
Performance & data-heavy UI: HTML Canvas · Interactive maps · Data visualization · Information-dense interfaces
AI in products: Segment Anything (SAM) integration · Dify workflows · AI workflow design

New opportunities

Available for the next challenge

I'm looking for remote senior frontend roles on complex products, where architecture, state, performance and product judgment matter.

Senior Frontend Engineer · Frontend Architecture · Product Engineering

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a.santiago.salas.b@gmail.com · Colombia · Remote