Emmanuel Barrera Salazar

Sr Software Engineer

Computer Science Engineer

EmailBarreraSlzr@gmail.com
Websitebarreraslzr.internetfriends.xyz
LocationGuadalajara, Mexico - Remote
Phone+52 (33) 1165-4324

About

Senior Software Engineer specializing in industrial and fintech solutions consolidating enterprise-grade applications, with proven expertise delivering scalable systems serving 1M+ users.

Core Competencies:

  • Deep technical proficiency across modern web architecture, automation, and developer tooling using Typescript, EffectTS, NextJS, Playwright, and Azure ecosystems.
  • Rapid adaptation skills: learned C#, Python, React Native, Java/Spring Boot, Ruby on Rails to deliver work requirements.
  • Track record of modernizing legacy systems and leading performance optimizations.
  • Architecting secure payment integrations with Stripe, RevenueCat, and financial platforms.

Professional Impact:

  • Building InternetFriends — personal brand focused on developer tools, automation, and knowledge sharing.
  • Day-to-day: delivering mission-critical fintech applications at scale for 1M+ users.
  • Previously drove innovation at Robert Bosch, building web applications and consulting cross-functional teams.
  • Adept at navigating complex technical challenges while maintaining focus on business impact and user experience.

Additional Information

Nationality🇲🇽 Mexican
Time ZoneAmerica/Mexico_City

Career Summary

  • ✔ Total Years of Experience: 11 years
  • ✔ Total Projects Completed: 14
  • ✔ Technologies Mastered: 41+

Professional Experience

Sr Software Engineer

Comunidad de Prestamos SAPI de CV

Mar. 2025 - Present

Building and scaling mission-critical fintech applications serving 1M+ users in Mexico. Leading mobile development with React Native and maintaining backend infrastructure with Ruby on Rails, working directly with C-level leadership to deliver high-impact features.

Featured Project: Zenfi App (Mexico) - Android & iOS

Development and maintenance of a financial React Native app for managing personal finances and payments ensuring secure and efficient transactions with 1M+ Mexican users. Work directly for CTO and Product Manager to deliver high-quality features and improvements in-app.

TypeScriptReact NativeReact Native SkiaReanimatedRuby on RailsRSpecRevenueCatStripeSQL Language - CTEsSSO - OAuth2Social SkillsTech Consultor

Sr Software Engineer

Farmacias Guadalajara, S.A. de C.V.

Oct. 2024 - Feb. 2025

Led modernization initiatives for legacy enterprise systems, focusing on warehouse logistics, inventory management, and supply chain optimization for one of Mexico's largest pharmacy chains.

Featured Project: Legacy Desktop Application Modernization for Purchasing & Logistics

Transformed performance and usability of a specialized Delphi desktop application critical for managing product distribution, vendor discounts, and logistics operations. Resolved severe latency issues by implementing custom hash-tree data structures that dynamically respond to local user filters, significantly improving system responsiveness.

Delphi/PascalJavaSpring BootSQL Language - CTEsGeneral Hardware AcknowledgeSocial SkillsEmbrace newest techTech Consultor

Software Engineer L3

Robert Bosch México S.A. de C.V.

Aug. 2019 - Apr. 2024

Led full-stack development and technical consulting for global enterprise applications at Bosch. Part of agile 3-developer team delivering high-velocity solutions across HR, financial systems, security compliance, and Industry 4.0 initiatives. Pioneered setting up LLM, DevOps, QA automation infrastructure while driving innovation and empowering non-technical teams through technology education and workflow automation.

Featured Project: National Platform for Preboarding and Onboarding Management

Development of a web application for the management of the recruitment of human resources with external users, internal administrators and different roles involved.

ReactNext.jsPlaywrightSASSSSO - OAuth2Azure WebAppMailingAzure Blob StorageQA AutomationAzure DevOps - CI/CDPWA - Progressive Web App

Tech Support and Marketing Content Creator

Zapata Camiones S.A. de C.V.

Mar. 2015 - Feb. 2018

Assisted in tech support of the company's tech devices and created content for the company's social networks. Position held through various outsourcing companies (RJN Desarrolladora de Servicios, Excel Technical Services de Mexico).