Open to opportunities

Rolly Sebastian

@rollysebastian

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Senior Full-Stack Software Engineer with 10+ years of experience building production secure, scalable software

Philippines

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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.

Senior Full-Stack Software Engineer with 10+ years of experience building production secure, scalable software across AI-powered platforms, Healthcare, Fintech and enterprise SaaS platforms.

Strong experience to take complex business challenges from concept to production by designing reliable solutions, leading engineering efforts, and delivering products that create measurable impact for users and organizations.

Experienced in owning projects end-to-end, collaborating with cross-functional teams, driving architectural decisions, and improving engineering practices to deliver secure, maintainable, and high-quality software.

A results-driven engineer and a hands-on technical engineer who thrives on solving complex problems, creating simple solutions, and helping teams build products that make a real-world impact.

Experienced in mentoring engineers, guiding teams through complex initiatives, and delivering solutions that improve reliability, efficiency, and long-term business value.

Energetic person, Great Team player, Excellent communicator and Problem solver.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Ambience Healthcare

Jul 2024 - Present (2 years 4 months)

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.