Senior Backend Engineer - AWS, Microservices, LLMs

Juan E. Morales Calvo

JUAN E. MORALES CALVO

Senior Software Engineer Backend • Cloud • AI/LLM Integration Boynton Beach, FL 786-***-**** ***********************@*****.*** linkedin.com/in/juan-enrique-morales-calvo PROFESSIONAL SUMMARY

Senior Software Engineer with 8+ years of experience building backend services, APIs, cloud-native systems, and data-intensive applications. Strong expertise in Python, Django/DRF, AWS, PostgreSQL, microservices, serverless architecture, and API design, with additional experience in Node.js, TypeScript, NestJS, GraphQL, Docker, and AI/LLM-enabled engineering workflows. Proven record of improving application performance, integrating enterprise services, and delivering production software in Agile, cross- functional environments.

TECHNICAL SKILLS

Languages & Frameworks: Python, Django, Django REST Framework (DRF), FastAPI, Node.js, TypeScript, JavaScript, NestJS, React.js, C#, C/C++

Cloud & Architecture: AWS Lambda, EC2, S3, RDS, SQS, SNS, Step Functions, DynamoDB, Microservices, Serverless, Event- Driven Architecture, REST APIs, GraphQL

Data & DevOps: PostgreSQL, MySQL, MongoDB, Oracle, Redshift, Redis, Elasticsearch, Kibana, Docker, Kubernetes, CI/CD, Git, GitHub, Linux, Pandas, PySpark

AI & LLM Engineering: OpenAI APIs, Claude Code, GitHub Copilot, Windsurf, MCP, RAG, AI Agents, Prompt Engineering, LLM Evaluation, Hugging Face

PROFESSIONAL EXPERIENCE

IT Senior Software Engineer NextEra Energy Sep 2024 – Present

• Build and maintain serverless microservices using AWS Lambda, SQS, SNS, and DynamoDB for enterprise applications.

• Develop and integrate GraphQL APIs supporting internal and customer-facing systems.

• Optimized PostgreSQL datasets and queries, reducing response times from approximately 8 seconds to near-instant.

• Implement Model Context Protocol (MCP) integrations connecting LLM-powered agents with enterprise APIs, databases, and business services.

• Use AI-assisted engineering workflows to analyze large codebases, generate technical specifications, accelerate feature delivery, improve documentation, and streamline debugging.

• Support CI/CD pipelines and Agile/SCRUM delivery across cross-functional engineering teams. Backend Engineer Credit Apps Software Inc. Nov 2023 – Sep 2024

• Developed and maintained backend services for a financial software platform using Python, Django, and PostgreSQL.

• Integrated Equifax, Trello, SendGrid, and other third-party APIs to automate workflows and expand platform capabilities.

• Implemented secure credit-report workflows and enterprise API integrations with attention to compliant data handling.

• Optimized complex Django ORM queries and database access patterns to improve application performance and reduce latency.

• Deployed and managed application infrastructure on AWS using EC2, S3, and RDS; collaborated with cross-functional teams in Agile delivery.

Backend Engineer Datamart Feb 2022 – Dec 2023

• Designed, developed, tested, and deployed AWS-based microservices using Python, C#, YAML, Lambda, and Step Functions.

• Created functional and technical specifications for APIs and services based on customer and business requirements.

• Built data-processing and analytics integrations using Redshift, AWS Glue, Pandas, PySpark, MySQL, and PostgreSQL.

• Developed a business intelligence dashboard with Amazon QuickSight, Pandas, and NumPy to support operational insights.

• Collaborated with distributed US and LATAM teams to troubleshoot production issues, optimize modules, and deliver features in Agile/SCRUM.

Software Engineer SwagUp Feb 2020 – Feb 2022

• Developed and maintained RESTful APIs using Python, Django REST Framework, and Pandas in Linux-based environments.

• Implemented integrations and backend solutions using Redis, AWS S3, DataDog, Jira, and related engineering tools.

• Contributed to AI-powered logo generation, shipping optimization, troubleshooting, and performance improvements.

• Worked with US-based cross-functional teams to design, test, and deliver backend functionality in Agile/SCRUM. Instructor, Linux Systems Programming & Networks MATCOM, University of Havana Sep 2017 – Jun 2020

• Taught C programming, Linux systems programming, networking, algorithms, and low-level development concepts.

• Supervised academic software projects and developed backend components using Python, PostgreSQL, and MySQL.

• Mentored students on software design, distributed algorithms, debugging, and implementation of university systems. EDUCATION

Bachelor of Computer Science University of Havana, Havana, Cuba Graduated 2015

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