Helmer Davila

Software Engineer and Fullstack Developer
Scroll

About me

I am a full-stack software engineer who builds product-focused systems across logistics, e-commerce, healthcare, developer experience, and startups. My work usually sits where business workflows meet reliable software: backend services, cloud architecture, integrations, automation, and interfaces that help teams move faster.

What I do

AI

I connected real applications with AI models such as Gemini, using MCP to expose useful tools and context so AI features can work with product workflows instead of isolated prompts.

Frontend

I used languages like HTML(5), CSS(3) and JavaScript to create useful UI in different projects. I built sites from scratch, with or without frameworks.

Backend

I coded the requirements and restrictions for the businesses, using backend frameworks with excellent scalability options and faster releases of new features.

SysOps

I deployed new updates with pipelines, setting test and production environments, using logging tools for constants reviews of where and when the code failed.

Certifications

AWS certifications that support my work across cloud architecture, serverless systems, and AI-enabled products.

AWS Certified AI Practitioner badge

AWS Certified AI Practitioner

AWS

Validates foundational knowledge of AI, machine learning, generative AI concepts, responsible AI, and how AWS AI services fit into real products.

AWS Certified Solutions Architect Associate badge

AWS Certified Solutions Architect - Associate

AWS

Validates designing secure, resilient, high-performing, and cost-aware AWS architectures across compute, storage, networking, and managed services.

How I work

The patterns I bring to teams: understanding the domain, connecting systems carefully, improving developer workflows, and keeping software observable.

Product-minded engineering

I start from the business workflow and use AI-assisted analysis where useful to shape software around real constraints, users, and operational feedback faster.

Integration-heavy systems

I connect product workflows with external systems such as ERP platforms, HL7 healthcare flows, AI models, MCP tools, and cloud services.

Developer experience

I improve local setup, component libraries, tooling, documentation, and support paths, using AI where it helps engineers spend less time fighting the platform.

Reliability habits

I use tests, monitoring, automation, and deployment discipline to make changes easier to review, release, and operate.

My stack

Mastra | Vercel AI | Model Context Protocol SDK

AI Frameworks

Python | NodeJS | PHP

Backend

React | Angular | Vue

Frontend

AWS | Google Cloud | Docker

Server management

Experience domains

Business domains where I have built and maintained software, from logistics and e-commerce to healthcare workflows and developer platforms.

Portless

Warehouse operations

Backend services for fulfillment, logistics workflows, reconciliation, ERP integrations, and operational diagnostics.

GCPFirebaseCloud RunPub/SubERP
SSENSE

Luxury e-commerce returns

Returns and post-purchase flows powered by event-driven systems, serverless infrastructure, monitoring, and test automation.

AWSServerlessPythonTypeScriptDatadog
AlayaCare

Home care developer experience

Developer experience and platform tooling for healthcare teams, including setup-time reduction, component libraries, and CLI workflows.

DXVueNodeJSDockerStorybook
Ambrea

Food delivery e-commerce startup

Co-founded a food delivery marketplace in 2017, leading platform development, product delivery, and a small engineering team.

LaravelPHPVueReactLeadership
Referwell

Healthcare referrals

Patient referral workflows in the US healthcare system, with microservices and healthcare interoperability work around HL7.

HL7PHPNodeJSMicroservicesAWS
Biteline

Dental staffing and healthcare hiring

Hiring platform for dental professionals, connecting hygienists, assistants, dentists, and offices with staffing opportunities.

ReactIonicGraphQLNestJSAWS
Mesa24/7

Restaurant reservations

Reservation system for gourmet restaurants in Peru, including a direct integration with Maido for booking experiences.

Ruby on RailsAWSReservationsHospitality
View full CV

Blog

AI is making technical work easier, but developer judgment and experience still matter.

AI Is Reducing Context Switching, But Experience Still Matters

How we deployed our backend using AWS

Using AWS to deploy a Startup project: Part 2 - Backend

See full post list