Simera Professional Key (SPK)

Diego A

El Salvador

Senior Frontend Engineer

$ 5,700/month

10+ yrs exp

I'm a Senior Full Stack Engineer with over 10 years of experience building web applications using React, Next.js, TypeScript, Node.js, and cloud-based architectures. Throughout my career, I've worked with U.S. companies leading frontend and full-stack initiatives, architecting scalable solutions, and collaborating directly with stakeholders.

Skills

  • A/B Testing
  • Adobe Illustrator
  • AngularJS
  • Docker
  • Git
  • GitHub
  • HTML
  • HTML5
  • HubSpot
  • iOS Development
  • JavaScript
  • Jenkins
  • Jira
  • MySQL
  • Node.js
  • PHP
  • PostgreSQL
  • Redux
  • SASS/SCSS
  • Scrum
  • Typescript
  • Vue.js
  • Wordpress
  • JavaScript ES6
  • Angular
  • Ant Design
  • API Testing
  • Code Review
  • Enzyme
  • ExpressJS
  • Figma
  • Front End
  • Gatsby
  • GitLab
  • GraphQL
  • Jest
  • JWT
  • Laravel
  • Material UI
  • Miro
  • NestJS
  • NextJS
  • Sketch
  • SketchUp
  • Software Engineer
  • Tailwind
  • Wed Development
  • RESTful APIs
  • SEO Principles
  • Performance Optimization
  • WordPress CMS
  • React.js
  • Web Performance Optimization
  • Contentful
  • Remixjs
  • Process Optimization
  • Backend Development (Node.js with TypeScript).
  • team development
  • AI Design
  • Nuxt.js
  • Hubspot
  • XR Development
  • TailwindCss
  • Nest.js
  • Micro
  • Next.js
  • Express
  • React js
  • Next js
  • Sales Development
  • AEM
  • press
  • SOP Development
  • React,js
  • Astro
  • AstroJS
  • Sketchu
  • Angular+17
  • CI/CD Pipelines
  • Express.js
  • REST APIs
  • MSQL
  • R&D Development
  • Microfrontend
  • Software Engineering
  • Git Hub
  • Tailwind CSS
  • KPI Development
  • SOLID Principles
  • React Query
  • React Testing Library

Diego A

El Salvador

Senior Frontend Engineer

$ 5,700 /month

10+ yrs exp

Intro Video

I'm a Senior Full Stack Engineer with over 10 years of experience building web applications using React, Next.js, TypeScript, Node.js, and cloud-based architectures. Throughout my career, I've worked with U.S. companies leading frontend and full-stack initiatives, architecting scalable solutions, and collaborating directly with stakeholders.

Skills

  • A/B Testing
  • Adobe Illustrator
  • AngularJS
  • Docker
  • Git
  • GitHub
  • HTML
  • HTML5
  • HubSpot
  • iOS Development
  • JavaScript
  • Jenkins
  • Jira
  • MySQL
  • Node.js
  • PHP
  • PostgreSQL
  • Redux
  • SASS/SCSS
  • Scrum
  • Typescript
  • Vue.js
  • Wordpress
  • JavaScript ES6
  • Angular
  • Ant Design
  • API Testing
  • Code Review
  • Enzyme
  • ExpressJS
  • Figma
  • Front End
  • Gatsby
  • GitLab
  • GraphQL
  • Jest
  • JWT
  • Laravel
  • Material UI
  • Miro
  • NestJS
  • NextJS
  • Sketch
  • SketchUp
  • Software Engineer
  • Tailwind
  • Wed Development
  • RESTful APIs
  • SEO Principles
  • Performance Optimization
  • WordPress CMS
  • React.js
  • Web Performance Optimization
  • Contentful
  • Remixjs
  • Process Optimization
  • Backend Development (Node.js with TypeScript).
  • team development
  • AI Design
  • Nuxt.js
  • Hubspot
  • XR Development
  • TailwindCss
  • Nest.js
  • Micro
  • Next.js
  • Express
  • React js
  • Next js
  • Sales Development
  • AEM
  • press
  • SOP Development
  • React,js
  • Astro
  • AstroJS
  • Sketchu
  • Angular+17
  • CI/CD Pipelines
  • Express.js
  • REST APIs
  • MSQL
  • R&D Development
  • Microfrontend
  • Software Engineering
  • Git Hub
  • Tailwind CSS
  • KPI Development
  • SOLID Principles
  • React Query
  • React Testing Library

Senior Frontend Engineer

AKUREY
January 2025 - present

Contribute to the development and maintenance of Flow Life’s real estate platform. Led architectural decisions for key platform initiatives at Flow Life, including evaluating and selecting technical approaches for new features, defining component structure standards, and conducting proof of concepts (POCs) that shaped the direction of production implementations. Developed custom HubSpot widgets, automation solutions, and messaging systems to improve prospect management and internal operational workflows. Led GrowthBook implementation for feature flags and A/B testing, enabling safer rollouts and experimentation-driven product decisions. Work within a distributed architecture composed of multiple Strapi instances and shared services, supporting scalable communication and data management across the platform. Led architecture discussions and made independent technical decisions across frontend and backend systems. Provide technical mentorship to AKUREY engineers through 1:1s, code reviews, and hands-on guidance, contributing to engineering quality standards and individual growth within the team. Contributed to CI/CD pipeline workflows using Jenkins, supporting consistent deployments across the distributed Strapi and Next.js platform.

Senior Software Engineer

NBCUniversal
January 2024 - January 2025

Contributed to the development and continuous improvement of NBCUniversal’s multiplatform authentication SDK supporting web and mobile experiences across brands, including NBC, Bravo, and E! News. Supported authentication workflows, including sign-in, registration, session management, profile updates, and SSO integrations for millions of end users across NBCUniversal digital products. Debugged and resolved high-impact production issues, improving authentication reliability, platform stability, and user experience across multiple applications. Worked on complex authentication challenges involving token/session management, cross-platform compatibility, scalability constraints, multi-application integrations, and edge-case handling. Collaborated with security, platform engineering, product, and application teams to support secure integrations and improve SDK performance and reliability.

Senior Frontend Developer

Timewise LLC
October 2023 - January 2024

Contributed to the development of a SaaS scheduling and business management platform used by small businesses to manage appointments, reservations, customer interactions, and class bookings. Developed and maintained frontend features using React.js, React Query, and GraphQL, supporting real-time scheduling workflows and dynamic data-driven interfaces. Improved application maintainability and development efficiency by reducing technical debt and optimizing legacy frontend implementations. Contributed to performance optimization efforts involving real-time updates, filtering systems, and scheduling-related user flows.

Senior Software Engineer

ApplaudoStudios
March 2020 - October 2023

Led frontend development for the CILL Errors UI platform, an internal Walmart operational tool used to monitor, edit, and reprocess failed enterprise transactions. Designed scalable frontend solutions using React, Redux, TypeScript, and Ant Design to support complex transaction workflows and high-volume datasets. Improved application performance by implementing virtualized tables for large datasets, reducing load times from 30–60 seconds to a few seconds on views containing 1000+ records. Collaborated directly with Walmart teams in an embedded environment, participating in technical discussions, requirement analysis, and solution planning. Served as the primary frontend point of contact for the Walmart CILL team, working on architecture decisions, improving application structure, scalability, and development workflows. Built advanced filtering and data visualization capabilities and integrated frontend applications with enterprise APIs and backend services.

Senior Software Engineer

Freelancer
January 2017 - present

Designed and developed web applications, SaaS platforms, dashboards, e-commerce solutions, and custom websites for startups and clients across industries, including real estate, hospitality, e-commerce, SaaS and operational services. Delivered end-to-end solutions using modern technologies, including React.js, Vue.js, Next.js, Remix, Node.js, Laravel, JavaScript, and TypeScript. Collaborated directly with clients to gather requirements, validate technical feasibility, conduct proof of concepts (POCs), and translate business needs into scalable technical solutions. Led architecture discussions and independently delivered projects across frontend and backend systems, adapting quickly to new technologies and fast-paced product environments. Strengthened engineering versatility through hands-on experience building applications across multiple stacks, frameworks, and business domains.

Full-stack Developer

Ideaworks International
June 2016 - February 2020

Developed websites, CMS platforms, and e-commerce solutions using JavaScript, Vue.js, PHP, Laravel, MySQL, and REST APIs. Contributed across frontend and backend development tasks, including feature implementation, API integrations, debugging, and application maintenance. Collaborated with product, design, and client teams to deliver scalable and maintainable web solutions while strengthening full-stack engineering practices. Built a custom pet adoption platform from scratch and worked with CMS-driven platforms, including WordPress and Laravel-based solutions.

Mid Software Engineer

studio503
December 2015 - June 2016

Contributed to the development of internal websites, marketing sites, and custom web applications using HTML, CSS, JavaScript, jQuery, and Ruby on Rails. Supported frontend and backend feature implementation while strengthening frontend foundations, responsive development practices, and Agile workflows.

Smart Scores

Communication
70
Role Fit
100
Adaptability
80
Problem-solving
80

Smart Skills

beta