About Jefferson Moises
Hey! I’m a Software Engineer with 4+ years of experience building real-world MERN (Node, React, TypeScript) applications. I design user-driven, scalable systems that save costs and boost performance, such as cutting DB costs by 71% or decreasing job executions from hours to 2 minutes. Using my circular knowledge in backend, frontend, and cloud, I can completely build entire vertical stacks fully ready for production. Let's discuss further your ideas!
Spanish
Native or bilingual
English
Fluent
Catalan
Fluent
Remote only
Primarily works remotely
Experience
- LambdaLoopersSoftware Engineer | Enterprise Cloud & Digital Workspace OrchestrationDIGITAL AND ITFebruary 2022 - November 2025 (3 years and 9 months)Oviedo, Spain
- Shipped an event-driven application tracking module that facilitated organization-wide system performance visibility for 100,000 devices using React, GraphQL, Node.js, and TypeScript.
- Reduced MongoDB costs by 71% in less than 2 months by optimizing data structures, indexes, migrating legacy collections, enforcing clear data retention policies, and sharding the database.
- Optimized aggregation pipelines in Node.js, cutting processing time from 8 hours to less than 2 minutes.
- Implemented IaC with CI/CD pipelines using Bicep and GitHub Actions, ensuring every environment was replicable and every change was tracked within Git.
- Successfully stabilized a legacy Python codebase, reducing error rates from 70% to less than 1% by covering the code with automated testing, applying clean code practices, and adhering strictly to TDD workflow to avoid regressions.
- Built data consumers in Node.js using Azure Function that processed +20,000 events per minute from Azure Event Hub.
- FreelancerWordPress Web DeveloperCONSULTING AND AUDITSJanuary 2020 - January 2022 (2 years)Spain
- Developed custom WordPress themes and plugins using PHP, JavaScript, and the WordPress Hooks API, eliminating 3rd party software subscription costs for specific simple use cases.
- Delivered websites under tight deadlines for time-sensitive launches by leveraging boilerplate templates and reusable components from the WordPress Core.
- Optimized search rankings and performance metrics by implementing schema markup, metadata structures, and caching with specific infrastructure configurations in Nginx, Apache, and writing optimized JavaScript and PHP code.
Recommendations
Be the first to recommend Jefferson Moises
Help this freelancer shine by sharing your experience working together.
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- Bachelor in Computer ScienceUniversitat Oberta de Catalunya (UOC)
Certifications
- Microsoft Certified: Azure Developer AssociateMicrosoft2023