Open to opportunities

Rolly Sebastian

@rollysebastian

Senior backend software engineer building HIPAA-compliant microservices for healthcare, telehealth, and revenue cycle systems.

Philippines

Message

What I'm looking for

I'm looking for a backend or full-stack engineering role where I can build scalable products, solve challenging technical problems, and work with a collaborative team that values ownership, quality, and continuous learning.

I’m a senior backend software engineer with 10+ years of experience designing and building scalable backend platforms for healthcare, telehealth, and revenue cycle management products. I focus on delivering reliable APIs and event-driven services that perform predictably at scale.

I build high-performance microservices with Java (Spring Boot) and Python (FastAPI), and I’m comfortable owning projects from architecture through production. I’ve led integrations with Epic, Oracle Cerner, and athenahealth, delivering secure, HIPAA-compliant systems that support interoperability and AI-powered clinical workflows.

I also prioritize performance optimization and operational excellence—tuning persistence with Hibernate/JPA, improving caching strategies, and refining database queries. From OAuth2/JWT/RBAC security to cloud-native deployments on AWS and Google Cloud with Docker and Kubernetes, I collaborate closely with product, infrastructure, and machine learning teams, and mentor engineers through reviews and technical design discussions.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Ambience Healthcare

Jul 2024 - Present (2 years 1 month)

Designed and delivered backend services for an AI-powered clinical documentation platform, building secure REST and GraphQL APIs and HIPAA/PHI-compliant access to patient and clinical data. Led integrations with Epic, Oracle Cerner, and athenahealth and built event-driven services using Kafka, PostgreSQL, and Redis on AWS and Google Cloud.

Java Spring Boot Python fastAPI REST APIs GraphQL Microservices HIPAA PHI Kafka PostgreSQL Redis Hibernate JWT RBAC Epic Cerner AWS Docker Kubernetes OAuth Event Driven Architecture Google Cloud Platform

Senior Full Stack Developer

Collectly

Mar 2021 - Jun 2024 (3 years 3 months)

Led backend development for revenue cycle management services including billing, payments, eligibility verification, and reconciliation. Built scalable asynchronous workflows with Celery, Redis, and PostgreSQL and implemented secure authentication/authorization using OAuth2 and JWT across distributed services.

Spring Boot fastAPI Flask Healthcare Interoperability Cerner Change Healthcare Celery Redis PostgreSQL SQL JWT RBAC Junit Pytest GitHub Actions OAuth Testing Automation

Full Stack Developer

Doctor Anywhere

Sep 2018 - Feb 2021 (2 years 5 months)

Developed backend microservices for teleconsultation scheduling, prescription workflows, and provider management. Built REST APIs for patient and pharmacy operations, implemented secure authentication/authorization and encryption, and supported WebRTC-based teleconsultation sessions.

Spring Boot Python Microservices REST APIs Encryption WebRTC Redis AWS Google Cloud Platform

Web Developer

Global BrainForce

Jul 2016 - Aug 2018 (2 years 1 month)

Developed backend applications and REST APIs for healthcare portals, administrative systems, and enterprise web platforms. Built reporting and data processing services using PostgreSQL and Redis and introduced automated unit testing with JUnit and Pytest in agile development environments.