/01 — portfolio
lat 52.2297° n
lng 21.0122° e
status
available · q2 2026

ivoiturrietasalinas

Senior software engineer & tech leader — architecting resilient systems at Fortune 500 and YC scale.

currently
Unlayer · YC W22
san francisco · remote
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React
Angular
TypeScript
Next.js
Redux
JavaScript
CSS
Node.js
Ruby on Rails
ASP.NET Core
C#
Go
PostgreSQL
Swift
React Native
Ionic Framework
AWS
Firebase
Git
CI/CD
Docker
REST
GraphQL
SQL
PostgreSQL
MongoDB
Jira
Confluence
React
Angular
TypeScript
Next.js
Redux
JavaScript
CSS
Node.js
Ruby on Rails
ASP.NET Core
C#
Go
PostgreSQL
Swift
React Native
Ionic Framework
AWS
Firebase
Git
CI/CD
Docker
REST
GraphQL
SQL
PostgreSQL
MongoDB
Jira
Confluence
/02 — about
[ident]
full-stack · systems · lead

Building resilient software that scales to millions — without losing the craft.

A decade shipping production systems — from investment banking compliance at Finalis to real-time sports data at LiveScore (10M+ daily users). Currently at Unlayer (YC W22) embedding AI into an enterprise email builder used by Fortune 500 companies.

I've led distributed teams of 12+, shipped offline-first mobile experiences to 15k international students, scaled educational platforms from 0 to 50k, and secured $500K in seed funding through technical execution alone.

10M+
daily users served
99.99%
uptime maintained
12+
devs led
$500K
funding secured
/03 — selected work

Featured projects

/04 — trajectory

Career arc

/ 01
10/2022 – Present
Unlayer (YC W22)

Senior Software Engineer

Contributing to an enterprise-grade email builder used by Fortune 500 companies. Implementing new features including AI-powered capabilities, adapting components following best practices, and collaborating on product iterations to enhance the platform's functionality and user experience.

San Francisco, USA (Remote)
/ 02
01/2019 – 08/2022
Swarmob

Chief Technical Officer

Scaled an educational platform from 0 to 50,000+ active students while maintaining 99.9% uptime. Pioneered an innovative offline-first architecture that enabled learning in low-connectivity areas, increasing user retention by 65%. Led a distributed team of 12 developers, implemented agile methodologies, and secured $500K in seed funding through demonstrated technical excellence and market impact.

Remote
/ 03
03/2021 – 09/2022
Livescore

Tech Lead

Orchestrated the frontend architecture for a platform serving real-time sports data to 10M+ daily users. Implemented advanced caching strategies and lazy-loading techniques that reduced page load times by 40%. Led the migration to Next.js, resulting in a 60% improvement in SEO metrics. Established code quality standards and mentored 8 developers while maintaining 95% test coverage.

Prague, Czech Republic
/ 04
08/2019 – 03/2021
Defined.ai

Senior Software Engineer

Revolutionized the AI data annotation workflow by developing intuitive interfaces that increased annotator productivity by 35%. Architected RESTful APIs handling 1M+ daily requests and implemented automated quality assurance systems that reduced error rates by 45%. Collaborated with data scientists to optimize machine learning pipelines and reduce model training time by 30%.

Porto, Portugal
/ 05
11/2017 – 06/2019
Finalis

Software Engineer

Developed a comprehensive compliance management system processing $2B+ in investment banking transactions. Implemented SOC 2 compliant security measures and automated due diligence workflows that reduced client onboarding time from 2 weeks to 5 days. Built real-time document verification system that achieved 99.9% accuracy in fraud detection.

San Francisco, USA
/ 06
12/2014 – 01/2019

Independent Freelancer

Delivered 20+ full-stack applications across diverse industries, achieving 100% client satisfaction rate. Notable projects included a real estate platform that automated 90% of property management tasks, university apps serving 15,000+ students, and e-commerce solutions processing $1M+ in annual transactions. Consistently delivered projects under budget while exceeding performance requirements.

Chile
/05 — stack

Tools of the trade

/01
07

Frontend

  • React
  • Angular
  • TypeScript
  • Next.js
  • Redux
  • JavaScript
  • CSS
/02
06

Backend

  • Node.js
  • Ruby on Rails
  • ASP.NET Core
  • C#
  • Go
  • PostgreSQL
/03
03

Mobile

  • Swift
  • React Native
  • Ionic Framework
/04
05

Cloud & DevOps

  • AWS
  • Firebase
  • Git
  • CI/CD
  • Docker
/05
05

APIs & Data

  • REST
  • GraphQL
  • SQL
  • PostgreSQL
  • MongoDB
/06
02

Tools

  • Jira
  • Confluence
/06 — signal

Let's build
something remarkable.