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Luis Serrano

@luisserrano2

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Senior Python full-stack engineer specializing in scalable, secure cloud-native and AI-driven systems.

United States

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What I'm looking for

I seek senior engineering roles building scalable, secure cloud-native and AI/LLM-enabled systems with strong observability, mentorship opportunities, and cross-functional impact.

I am a senior Python full-stack engineer with deep experience architecting cloud-native, high-throughput systems and modernizing legacy monoliths into scalable microservices. I combine backend expertise with frontend fluency to deliver reliable, maintainable software that meets business goals.

At Microsoft, I designed distributed FastAPI and gRPC services handling >10K RPS, built LLM-enhanced backends with LangChain/OpenAI, and implemented data pipelines processing terabytes daily with Airflow and Kafka. I emphasize performance tuning and observability using OpenTelemetry, Prometheus, and Grafana.

Previously at Adobe, Intuit, and Salesforce I led cross-functional squads to deliver AI-enhanced consumer and B2B products, implemented vector search (FAISS/Weaviate), and deployed secure, PCI- and SOC-compliant financial systems. I have hands-on experience with Kubernetes, Terraform/Pulumi, CI/CD, and multi-cloud deployments.

I mentor engineers in design patterns, testing, and typing best practices, and I seek to build pragmatic, well-instrumented systems that scale, remain secure, and accelerate time-to-value for customers and stakeholders.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack Engineer

Current

Microsoft

Jul 2023 - Present (2 years 6 months)

Architected cloud-native Python microservices and LLM-enhanced backend systems on AKS, handling >10K RPS with multi-region failover and reducing task throughput bottlenecks by 72% through event-driven refactoring.

Python fastAPI gRPC Terraform OpenAI API PostgreSQL Kafka Apache Airflow

Lead Full Stack Developer

Adobe

Aug 2021 - Jun 2023 (1 year 10 months)

Led architecture and delivery of AI-enhanced full-stack web applications using Go, Python, and React, improving Lighthouse performance metrics by 40%+ and reducing duplicated code by 60% via a modular monorepo.

Go Python React Next.js Kubernetes Faiss Docker CI CD Redis

Python Tech Lead

Intuit

Jan 2019 - Jul 2021 (2 years 6 months)

Architected secure financial APIs and microservices in Python, supporting 50M+ monthly transactions with PCI-DSS compliance and improving anomaly detection precision by 47% via integrated ML fraud models.

Python fastAPI PostgreSQL Celery Kafka scikit learn XGBoost Kubernetes Terraform OpenTelemetry

Senior Full Stack Developer

Salesforce

Nov 2015 - Dec 2018 (3 years 1 month)

Led development of a global content platform using React and Next.js serving 20M+ monthly users, migrated to JAMstack to improve SEO and reduce TTFB by 60%.

React Next.js Python Contentful Cloudflare Workers Elasticsearch Docker CI CD WebSockets

Mid-Senior Python Developer

Humana

Oct 2014 - Oct 2015 (1 year)

Built HIPAA-compliant healthcare web applications and microservices in Python, improving claim prediction and operational efficiency by 28% through ML models and background job automation.

Python Flask Django PostgreSQL Celery XGBoost HL7 FHIR Docker AWS

Mid Web Developer

Montclair State University

Jun 2013 - Sep 2014 (1 year 3 months)

Developed and maintained academic web portals in Python and JavaScript, improving portal load times by 40% and introducing CI practices to increase test coverage to 85%.

Python Flask Vue.Js AngularJS MySQL Celery Docker Jenkins LDAP

Education

Degrees, certifications, and relevant coursework

Montclair State University

Bachelor of Science, Information Technology

Bachelor of Science in Information Technology completed at Montclair State University, focusing on web and backend development applied to academic systems.