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Hi, I'm Nicholas Sean Petrillo, a seasoned full-stack developer with over 11 years of experience crafting high-quality, scalable B2B SaaS MVPs. I specialize in frontend and backend development, AI integration using OpenAI API, and cloud-native solutions primarily on AWS and GCP. I enjoy transforming complex business workflows into user-friendly software that drives efficiency and innovation. I thrive in Agile team environments where I can contribute my skills in React, Node.js, Python, and cloud technologies while mentoring junior developers. Whether building intelligent data pipelines or developing real-time collaboration tools, I’m passionate about writing clean, maintainable code and delivering solutions that genuinely enhance business processes across healthcare, e-commerce, and real estate sectors.…Hi, I'm Nicholas Sean Petrillo, a seasoned full-stack developer with over 11 years of experience crafting high-quality, scalable B2B SaaS MVPs. I specialize in frontend and backend development, AI integration using OpenAI API, and cloud-native solutions primarily on AWS and GCP. I enjoy transforming complex business workflows into user-friendly software that drives efficiency and innovation. I thrive in Agile team environments where I can contribute my skills in React, Node.js, Python, and cloud technologies while mentoring junior developers. Whether building intelligent data pipelines or developing real-time collaboration tools, I’m passionate about writing clean, maintainable code and delivering solutions that genuinely enhance business processes across healthcare, e-commerce, and real estate sectors.

Nicholas Sean Petrillo

Back-End Developer, Full Stack Developer, DevOps Developer, +4

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Hi, I'm Nicholas Sean Petrillo, a seasoned full-stack developer with over 11 years of experience crafting high-quality, scalable B2B SaaS MVPs. I specialize in frontend and backend development, AI integration using OpenAI API, and cloud-native solutions primarily on AWS and GCP. I enjoy transforming complex business workflows into user-friendly software that drives efficiency and innovation. I thrive in Agile team environments where I can contribute my skills in React, Node.js, Python, and cloud technologies while mentoring junior developers. Whether building intelligent data pipelines or developing real-time collaboration tools, I’m passionate about writing clean, maintainable code and delivering solutions that genuinely enhance business processes across healthcare, e-commerce, and real estate sectors.…Hi, I'm Nicholas Sean Petrillo, a seasoned full-stack developer with over 11 years of experience crafting high-quality, scalable B2B SaaS MVPs. I specialize in frontend and backend development, AI integration using OpenAI API, and cloud-native solutions primarily on AWS and GCP. I enjoy transforming complex business workflows into user-friendly software that drives efficiency and innovation. I thrive in Agile team environments where I can contribute my skills in React, Node.js, Python, and cloud technologies while mentoring junior developers. Whether building intelligent data pipelines or developing real-time collaboration tools, I’m passionate about writing clean, maintainable code and delivering solutions that genuinely enhance business processes across healthcare, e-commerce, and real estate sectors.

Available to hire

Hi, I’m Nicholas Sean Petrillo, a seasoned full-stack developer with over 11 years of experience crafting high-quality, scalable B2B SaaS MVPs. I specialize in frontend and backend development, AI integration using OpenAI API, and cloud-native solutions primarily on AWS and GCP. I enjoy transforming complex business workflows into user-friendly software that drives efficiency and innovation.

I thrive in Agile team environments where I can contribute my skills in React, Node.js, Python, and cloud technologies while mentoring junior developers. Whether building intelligent data pipelines or developing real-time collaboration tools, I’m passionate about writing clean, maintainable code and delivering solutions that genuinely enhance business processes across healthcare, e-commerce, and real estate sectors.

Skills

Experience Level

Expert

Expert

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Expert

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Intermediate

Intermediate

Intermediate

Beginner

Language

English

Fluent

Work Experience

Senior Backend Developer at HealthBookplus, Inc

April 30, 2025 - July 30, 2025

Spearheaded backend development for a modern, HIPAA-compliant patient management system, integrating HL7/FHIR APIs and secure messaging between providers and patients. Designed and maintained RESTful APIs using Spring Boot and FastAPI for claim management, scheduling, and secure communication workflows. Implemented real-time event-driven microservices architecture using AWS EventBridge and SNS to support scalable communication across clinical modules. Developed EHR integration pipelines using AWS Lambda, RDS, and DocumentDB to process and store critical health data efficiently. Delivered cloud-native microservices deployed via EKS and monitored using CloudWatch and Prometheus, reducing incident recovery time by 30%. Collaborated with cross-functional teams in agile ceremonies to deliver FDA-compliant features supporting patient dashboards, appointment tracking, and outcome reporting. Mentored junior developers and enforced backend engineering standards, including code reviews and docum

Backend Developer at Presidium Health Corp

April 30, 2022 - July 30, 2025

Designed and implemented backend services for patient onboarding and care plan automation using Spring Boot and Node.js in a HIPAA-regulated environment. Developed secure RESTful APIs to support mobile and web front ends, enabling real-time care coordination and claims submissions. Integrated EHR data via HL7/FHIR protocols and implemented AWS-based architecture using Lambda, SQS, and RDS. Built CI/CD pipelines with Jenkins and GitHub Actions to ensure consistent and secure production releases. Implemented patient-facing features including appointment reminders, care analytics dashboards, and secure chat using WebSockets and API Gateway. Enhanced overall platform reliability and test coverage through unit and integration testing using JUnit, PyTest, and Jest.

Backend Developer at Outreach, Corporation

September 30, 2018 - July 30, 2025

Led development of internal tools to support care coordination, reporting, and resource allocation for large healthcare clients. Built backend systems using Java and Python, focusing on reliability and security in data processing and analytics. Managed deployments on AWS using EC2, Lambda, CloudFormation, and S3, ensuring platform compliance with healthcare regulations. Developed infrastructure as code with Terraform and implemented CI/CD automation using Jenkins. Supported HL7 data ingestion, visual analytics, and audit logging features to support compliance and traceability.

Full Stack Developer at Amazon.com, Inc

February 28, 2017 - July 30, 2025

Developed internal services for e-commerce platform supporting millions of users across marketplaces. Led the creation of microservices in Java and Node.js deployed via ECS and Lambda. Built secure APIs and integrated authorization/authentication workflows across platforms. Monitored system health using Prometheus and Grafana, implemented self-healing architecture for key backend services. Wrote comprehensive unit and load tests, optimizing backend workflows for 20% higher throughput under peak loads.

Senior Full Stack Developer at HealthBookplus, Inc

April 30, 2025 - July 30, 2025

Led frontend development of a healthcare SaaS MVP platform focusing on patient management and provider dashboards using React, TypeScript, Redux, and TailwindCSS. Transformed Figma and clinician wireframes into pixel-perfect UIs and developed AI-assisted data ingestion pipelines with data cleaning and validation. Integrated OpenAI API to automate data mapping and built forecasting dashboards to support clinical planning. Developed real-time notification and messaging using WebSockets and AWS SNS. Maintained CI/CD pipelines with GitHub Actions and Docker, deployed on AWS services. Collaborated on HIPAA-compliant backend APIs and mentored junior developers while influencing frontend architectural decisions.

Full Stack Developer at Presidium Health Corp

April 30, 2022 - July 30, 2025

Designed and implemented a healthcare SaaS MVP with real-time patient updates, dashboards, appointment scheduling, and secure messaging using React, Next.js, TailwindCSS, and TypeScript. Built data ingestion connectors with AI-assisted auto-mapping leveraging OpenAI API. Created interactive dashboards supporting what-if scenarios and led CI/CD workflows with Docker and AWS. Integrated OAuth2 authentication securing multi-role access. Developed real-time chat features, collaborated with backend teams for analytics, and mentored junior developers to ensure high-quality delivery under Agile methodologies.

Full Stack Developer at Outreach, Corporation

September 30, 2018 - July 30, 2025

Contributed to a healthcare SaaS platform by building backend services and data ingestion workflows integrating AWS infrastructure components. Automated deployment pipelines with Jenkins, Git, Docker, and Kubernetes. Developed Python-based data cleaning and analytics scripts using Django and Pandas. Configured network security for multi-tenant SaaS hosting and implemented collaboration features including role-based access and admin dashboards. Led DevOps automation using Terraform and Ansible on AWS.

Full Stack Developer at Amazon.com, Inc

February 28, 2017 - July 30, 2025

Developed scalable SaaS microservices for healthcare and e-commerce sectors, improving efficiency by 20%. Designed RESTful APIs with Django and Node.js using async programming for performance optimization. Led frontend development with AngularJS and React. Architected event-driven microservices for reliability and fault tolerance. Managed relational databases and optimized queries. Collaborated cross-functionally to deliver SaaS MVPs integrating AI-powered recommendations. Maintained high code quality via Git version control and code reviews.

Senior Full Stack Developer at HealthBookplus, Inc

April 30, 2025 - July 30, 2025

Led frontend development of a healthcare SaaS MVP platform focusing on patient management and provider dashboards using React, TypeScript, Redux, and TailwindCSS. Delivered responsive, medical standards-compliant interfaces and reusable design systems. Developed AI-assisted data ingestion pipelines, integrated OpenAI API for data auto-mapping, and engineered forecasting dashboards for clinical planning. Built real-time notifications with WebSockets and AWS SNS, maintained CI/CD pipelines, and mentored junior developers while collaborating on HIPAA-compliant backend APIs.

Full Stack Developer at Presidium Health Corp

April 30, 2022 - July 30, 2025

Designed and implemented a healthcare SaaS MVP enabling real-time patient updates, dashboards, appointment scheduling, and secure messaging with React, Next.js, TailwindCSS, and TypeScript. Built AI-assisted data connectors, patient outcome dashboards with what-if scenarios, and integrated OAuth2 authentication securing multi-role access. Led Docker and GitHub Actions CI/CD workflows, developed real-time chat features, collaborated on backend analytics, and mentored junior developers on React and SaaS patterns.

Full Stack Developer at Outreach, Corporation

September 30, 2018 - July 30, 2025

Contributed to a HIPAA-compliant healthcare SaaS platform by building backend services, data ingestion workflows on AWS, real-time data analytics APIs, and ETL pipelines. Automated deployment pipelines using Jenkins and Kubernetes. Developed data cleaning scripts and analytics dashboards. Configured secure multi-tenant environments and developed collaboration features including role-based access and admin dashboards.

Full Stack Developer at Amazon.com, Inc

February 28, 2017 - July 30, 2025

Developed scalable SaaS microservices for healthcare and e-commerce, improving application efficiency by 20%. Designed REST APIs with Django and Node.js, led frontend development of dashboards using AngularJS and React, architected event-driven microservices, managed relational databases, and collaborated on AI-powered recommendation engines. Maintained high code quality and streamlined cross-functional delivery.