Luis Vargas
Tech Lead | Senior Software Engineer | AWS Certified Solutions Architect | Serverless & GenAI
About
Tech Lead and Senior Software Engineer focused on cloud-native, serverless architectures that scale. I design and ship end-to-end solutions on AWS using CDK — with a strong focus on reliability, observability, and cost-aware design. Experienced integrating Generative AI (Amazon Bedrock) into real production workflows to automate complex document processing and decision-making. Product-minded, execution-driven, and calm under pressure. I thrive in high-ownership environments where engineering quality directly impacts business outcomes.
Execution-Driven
Ship fast, iterate, and deliver measurable impact.
Product-Minded
Engineering decisions grounded in business outcomes.
Reliability-First
Build systems that are observable, resilient, and cost-aware.
Team Multiplier
Elevate team capabilities through mentoring and collaboration.
Experience
Tech Lead
Itemize · Remote
- Leading technical direction and architecture decisions for core platform systems, driving alignment across engineering squads.
- Defining and enforcing engineering standards for serverless microservices, ensuring consistency in code quality, testing, and observability.
- Collaborating with product and stakeholders to translate business goals into scalable technical roadmaps.
- Mentoring engineers through code reviews, architecture discussions, and pairing sessions to grow team capabilities.
Software Engineer
Itemize · Remote
- Designed and built event-driven serverless pipelines for financial document automation using AWS Lambda, SQS, and DynamoDB.
- Integrated Amazon Bedrock LLMs into asynchronous processing workflows, improving extraction accuracy for complex document types.
- Implemented reliability patterns (dead-letter queues, circuit breakers, retry policies) to ensure zero-data-loss processing at scale.
- Built comprehensive observability with structured logging, custom CloudWatch metrics, and distributed tracing.
Senior Software Engineer II
Allied Global Technology Services · Remote
- Architecting and delivering enterprise-grade serverless solutions on AWS for multiple client engagements.
- Driving infrastructure-as-code adoption with AWS CDK, reducing deployment friction and environment drift.
- Leading cross-functional collaboration between engineering, QA, and DevOps to ship reliable releases on tight timelines.
- Establishing patterns for multi-tenant integrations, connectors, and workflow orchestration.
Founder & Principal Software Engineer
Techxperto · Guatemala City
- Founded and ran a software consultancy delivering SaaS and enterprise solutions for clients across Latin America.
- Designed full-stack architectures from scratch — backend APIs, database schemas, cloud infrastructure, and modern frontend UIs.
- Managed end-to-end project lifecycles: discovery, estimation, development, deployment, and ongoing support.
- Built reusable component libraries and internal tooling to accelerate delivery across projects.
Projects
AI-First Financial Document Automation
End-to-end serverless pipeline that extracts, classifies, and processes financial documents using GenAI — replacing manual review workflows.
- Integrated Amazon Bedrock LLMs for intelligent document classification and data extraction
- Built fault-tolerant async pipelines with SQS, Lambda, and DynamoDB ensuring zero data loss
- Reduced document processing time significantly through parallel execution and smart batching
Serverless Event-Driven Platform
Scalable platform components built on AWS serverless primitives, powering high-throughput, event-driven workloads.
- Designed event sourcing patterns with SQS, SNS, and EventBridge for decoupled microservices
- Implemented comprehensive observability with CloudWatch metrics, alarms, and X-Ray tracing
- Infrastructure fully managed as code with AWS CDK, enabling consistent multi-environment deployments
Multi-Tenant Integrations Hub
Centralized integration layer managing connectors, workflows, and data synchronization across multiple tenant environments.
- Architected tenant isolation patterns for secure multi-tenant data processing
- Built configurable workflow engine supporting custom connector logic per tenant
- Implemented retry, circuit breaker, and dead-letter patterns for reliable integrations
Techxperto SaaS Platform
Full-stack SaaS product built from the ground up for enterprise clients, featuring modern UI and scalable backend services.
- Designed and shipped complete product from architecture to production deployment
- Built modular React frontend with reusable component library and design system
- Implemented secure API layer with authentication, authorization, and rate limiting
Trading Signals & ML Experimentation
Side project exploring machine learning models for market signal detection and automated trading strategy backtesting.
- Built data pipelines for real-time market data ingestion and feature engineering
- Experimented with ML models for pattern recognition and signal generation
- Developed backtesting framework to validate strategies against historical data
Skills
Cloud & Architecture
Backend
Frontend
Data & AI
Databases
Blockchain & Web3
Soft Skills
Certifications
AWS Certified Solutions Architect - Associate
Amazon Web Services
Registered Scrum Master
Scrum Inc.
Mindfulness Facilitator
Mindfulness Without Borders
Education
B.S. in Systems Engineering
Universidad de San Carlos de Guatemala
2017 - 2021
Let's Connect
Interested in collaboration, consulting, or just talking tech? Drop me a line — I reply fast.