Backend Engineer · AWS Serverless · Cloud & Data

Ángel Lillo

Backend Engineer · AWS Serverless Architecture · Cloud & Data

Computer Engineer specialized in backend development and AWS serverless architecture for critical systems. I combine technical design, implementation, and production operations to build resilient, scalable, and maintainable solutions, with continuous learning in AI applied to software development.

Critical systems Event-driven architecture Cloud & Data

Backend Node.js, AWS Lambda, APIs, enterprise integration

Architecture Step Functions, event-driven systems, resilience

Delivery QA, production incidents, continuous improvement

Let's talk View case studies Professional CV ATS CV

Currently focused on High-criticality serverless backend systems

Technical design, enterprise integration, and cloud operations with reliability at the center.

Results

Production impact already demonstrated

Resolution of critical production incidents
Complex workflow design with AWS Step Functions
Advanced DynamoDB modeling and inconsistency remediation
Enterprise integration with SAP and AS400 systems
Continuous learning in AI applied to software development and technical automation

Highlighted experience

Where backend, cloud, and delivery meet

01 / 01

COPEC FFAA

High-scale system for critical information management.

Responsibilities

Backend development with Node.js in a serverless architecture.
Process orchestration with AWS Step Functions.
AWS Lambda implementation with robust retry and error handling.
Integration with SAP (events, batch, RFC/IDoc/API) and AS400.
Resilience using SQS + DLQ.
DynamoDB data modeling and inconsistency remediation.

Outcomes

Resolution of critical production incidents.
Code quality improvements with SonarQube.
Cross-functional contribution to QA, estimations, and technical design.

Links

FFAA COPEC

Tech stack used

Node.jsAWS LambdaStep FunctionsSQS / DLQDynamoDBSAPAS400SonarQube

RVA (Red Virtual de Alimentos)

Mobile application and API integration.

Responsibilities

Mobile frontend development with Flutter.
REST API integration.
Implementation of functional interfaces and user flows.

Links

RVA Android RVA iOS

Tech stack used

FlutterDartREST APIs

Data Warehouse Subproject

Design and implementation of analytics data components in AWS.

Responsibilities

Data architecture design.
ETL implementation with AWS Glue.
Crawler and data catalog configuration.
Analytical querying with Athena.
Resolution of data visualization and availability issues.

Tech stack used

AWS GlueAthenaS3ETLData Catalog

Stack

Core stack

Node.jsC#AWS LambdaAWS Step FunctionsAmazon SQSDynamoDBS3Serverless ArchitectureEvent-Driven DesignAWS GlueAthena

Complementary

Tools and supporting layers

PostgreSQLOracle (SQL / PL-SQL)AngularFlutterDjangoDockerGitLinux / ZshSonarQubeAI applied to developmentTechnical promptingAI-assisted automation

Current focus

Areas where I deliver the most value today

Scalable software architecture
Distributed systems
Advanced serverless in AWS
Data engineering
Software quality and QA process maturity
Practical AI adoption for software development

Contact

Direct channels to connect or coordinate

LinkedIn GitHub Corporate email Personal email