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Senior Software Engineer with 10+ years of experience building production web applications, backend services, and cloud-native systems. Hands-on expertise across Node.js, Java (Spring Boot), C#, React, Next.js, TypeScript, and Python FastAPI, with a focus on performance, reliability, and measurable product outcomes. Experienced in integrating LLM and RAG capabilities, designing event-driven architectures, and delivering across AWS/Azure/GCP using Docker, Kubernetes, and Terraform. Proven ability to lead technical initiatives, mentor engineers, and improve software quality through testing, monitoring, and automation.…Senior Software Engineer with 10+ years of experience building production web applications, backend services, and cloud-native systems. Hands-on expertise across Node.js, Java (Spring Boot), C#, React, Next.js, TypeScript, and Python FastAPI, with a focus on performance, reliability, and measurable product outcomes. Experienced in integrating LLM and RAG capabilities, designing event-driven architectures, and delivering across AWS/Azure/GCP using Docker, Kubernetes, and Terraform. Proven ability to lead technical initiatives, mentor engineers, and improve software quality through testing, monitoring, and automation.

Aaron Harnage

Software Engineer, Full Stack Developer, Back-End Developer, +2

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Senior Software Engineer with 10+ years of experience building production web applications, backend services, and cloud-native systems. Hands-on expertise across Node.js, Java (Spring Boot), C#, React, Next.js, TypeScript, and Python FastAPI, with a focus on performance, reliability, and measurable product outcomes. Experienced in integrating LLM and RAG capabilities, designing event-driven architectures, and delivering across AWS/Azure/GCP using Docker, Kubernetes, and Terraform. Proven ability to lead technical initiatives, mentor engineers, and improve software quality through testing, monitoring, and automation.…Senior Software Engineer with 10+ years of experience building production web applications, backend services, and cloud-native systems. Hands-on expertise across Node.js, Java (Spring Boot), C#, React, Next.js, TypeScript, and Python FastAPI, with a focus on performance, reliability, and measurable product outcomes. Experienced in integrating LLM and RAG capabilities, designing event-driven architectures, and delivering across AWS/Azure/GCP using Docker, Kubernetes, and Terraform. Proven ability to lead technical initiatives, mentor engineers, and improve software quality through testing, monitoring, and automation.

Available to hire

Senior Software Engineer with 10+ years of experience building production web applications, backend services, and cloud-native systems. Hands-on expertise across Node.js, Java (Spring Boot), C#, React, Next.js, TypeScript, and Python FastAPI, with a focus on performance, reliability, and measurable product outcomes.

Experienced in integrating LLM and RAG capabilities, designing event-driven architectures, and delivering across AWS/Azure/GCP using Docker, Kubernetes, and Terraform. Proven ability to lead technical initiatives, mentor engineers, and improve software quality through testing, monitoring, and automation.

Skills

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Work Experience

Senior Software Engineer at Infinite Red

January 1, 2022 - Present

Led backend architecture and development using Node.js and Java Spring Boot, improving API response times by ~20% through production monitoring and service profiling. Owned frontend architecture using React, Next.js, and TypeScript, reducing page-load times by ~25% via bundle optimization, lazy loading, and browser performance profiling. Drove LLM integration through Python FastAPI services for summarization, conversational workflows, and structured extraction, reducing manual processing effort by ~33% across selected workflows. Designed event-driven workflows using Kafka and AWS SQS for asynchronous processing, improving resilience for background jobs and reducing blocking API dependencies. Directed multi-cloud delivery across AWS, Azure, and GCP using Docker, Kubernetes, Terraform, and automated CI/CD pipelines. Established monitoring with Prometheus and Grafana to reduce troubleshooting time by ~20–30%, and expanded automated testing with Jest, Cypress, PyTest, and JUnit to increa

Software Engineer at Particle Health

May 1, 2019 - October 1, 2021

Developed Node.js and Java Spring Boot services for healthcare workflows, reducing API latency by ~15–20% through profiling, query optimization, and application-level caching. Designed and optimized PostgreSQL and MongoDB data access patterns, improving provider-search response times by ~20% based on monitoring. Implemented OAuth2 and JWT authentication/authorization controls for sensitive provider and healthcare data. Integrated LLM capabilities via Python FastAPI for document summarization and structured extraction, reducing manual review effort by ~25%. Built RAG workflows using FastAPI with Elasticsearch-backed retrieval to provide relevant healthcare context to internal AI-assisted applications. Improved quality with Jest, PyTest, JUnit, and API integration testing, reducing regression issues reaching later release stages by ~20%. Supported production reliability with structured logging, API validation, error handling, and troubleshooting in distributed healthcare workflows, col

Full Stack Developer at Snowflake

November 1, 2017 - February 1, 2019

Built responsive enterprise interfaces using Angular, React, JavaScript, and TypeScript for data-intensive analytics and reporting workflows. Developed Node.js backend services and REST APIs supporting frontend applications, reporting features, and internal platform integrations. Implemented Java Spring Boot services for workflows requiring structured business logic and reusable backend components. Added OAuth2 and JWT-based authentication and authorization for administrative and data-driven application workflows. Automated testing, builds, and deployments using Docker and Jenkins, shortening CI processing time by ~20%. Collaborated with frontend, backend, and platform engineers through code reviews, API design, debugging, and coordinated production releases.

Web Developer at Ribbon Health

May 1, 2015 - December 1, 2018

Developed patient-facing interfaces using React, AngularJS, JavaScript, HTML5, CSS3, and Bootstrap for healthcare provider-search workflows. Built Node.js and Express services supporting provider lookup, frontend data retrieval, and integration with healthcare workflows. Integrated frontend applications with C#/.NET and ASP.NET backend services via REST APIs. Improved page-loading performance by ~25% through JavaScript refactoring, asset optimization, and browser performance analysis. Collaborated on API integration, UI implementation, defect resolution, and production support, working through code reviews and cross-functional troubleshooting.