Languages
C#.NET Core.NET FrameworkTypeScriptJavaScriptPython 3Java
Fullstack developer / Architect
Marcos Barrera builds practical systems for real business workflows.
Software developer and architect with 11 years of combined experience delivering custom platforms, cloud infrastructure, ETL pipelines, and team-level technical leadership.
La Libertad, El Salvadordev.mbarrera@gmail.com
Data
SQL ServerT-SQLOraclePL/SQLNoSQL
Web
Node.jsReactAngularMicro-frontends
Cloud and Infrastructure
Google Cloud PlatformDockerKubernetesTerraformCI/CD
Practices
Solution ArchitectureDevOpsTDDUnit TestingAgile ScrumCOBIT 5
Experience
EXP-01
Lead Applications Developer Analyst IB
Telus Digital Experience
November 2024 - Present
Santa Tecla, El Salvador (Remote)
- Promoted from Senior Application Developer Analyst to Lead Applications Developer Analyst IB within 2.5 years.
- Recognized twice as Top Performer for critical client project contributions under tight deadlines.
- Architected custom end-to-end solutions across on-premise, hybrid, and GCP environments.
- Built backend, frontend, database, ETL, CI/CD, Docker, Kubernetes, and Terraform delivery paths.
- Engineered ETL pipelines, micro-frontend applications, and bespoke message brokers for distributed systems.
- Provided on-call support for mission-critical services and delivered BI reporting for stakeholders.
- Led technical training on Microsoft technologies, Docker, and Kubernetes while supporting hiring assessments.
EXP-02
Software Developer / Technical Lead
The Office Gurus
October 2019 - April 2022
El Salvador
- Developed custom business applications using the Microsoft technology stack.
- Engineered ETL pipelines and internal web applications to streamline operations.
- Led teams of 4 to 8 engineers through code reviews, mentorship, and technical delivery.
- Contributed to architecture and system design decisions for internal infrastructure.